Active NPI 1548251168 Individual Practitioner Male Practitioner

Dr. James C Mackenzie , MD

Internal Medicine • Troy, MI

✓ Accepts Medicare Assignment Telehealth Available

Public Directory Information & Medical Disclaimer

This profile is compiled from official public domain records provided by CMS and the NPPES registry. TRUE-MEDINFO is an independent reference directory and does not provide medical advice, diagnosis, or treatment recommendations. Always consult a licensed medical professional for personal health decisions.

Professional Overview & Biography Verified Profile Summary

Dr. James Mackenzie, MD is a registered Internal Medicine practitioner in Troy, MI. With approximately 55 years of clinical practice since graduating from Northwestern University Feinberg Medical School in 1971, Dr. Mackenzie provides healthcare services at the registered practice location at 1380 COOLIDGE HWY.

Dr. Mackenzie accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include established patient outpatient office visit, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, annual depression screening, 5 to. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1380 Coolidge Hwy
Suite 100

Troy, MI 480847018

Telephone 2482884000

Fax 2482883900

Associated Practice Facility / Clinic

🏢 James T Courtney Md,pc Facility NPI 1255380234

Medicare Profile & Education

Medical School

Northwestern University Feinberg Medical School

Graduation Year

1971

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Troy, MI

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

55 Yrs +25.8 yrs vs City Avg

City Avg: 29.2 Yrs

State Avg: 26.5 Yrs

Regional Practice Density

122 Specialists

Practicing in Troy, MI (6010 Statewide)

Telehealth Adoption Rate

37.7% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

30.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Mackenzie (55 Years) 55 Yrs

Troy Specialty Average (29.2 Years) 29.2 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	287	119	$125.00	$91.00
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	155	155	$250.00	$129.50
G0444 Annual depression screening, 5 to 15 minutes	147	147	$35.00	$18.61
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	83	77	$149.88	$128.34
99442 Telephone medical discussion with physician, 11-20 minutes	43	29	$100.00	$90.28
99441 Telephone medical discussion with physician, 5-10 minutes	41	36	$75.00	$56.09

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	285	124	$125.00	$85.10
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	162	162	$250.00	$118.04
G0444 Annual depression screening, 5 to 15 minutes	149	149	$35.00	$16.74
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	81	79	$145.68	$120.88
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	63	12	$35.00	$13.57
J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg	61	12	$6.00	$1.58
99441 Telephone medical discussion with physician, 5-10 minutes	34	25	$75.00	$52.60
99442 Telephone medical discussion with physician, 11-20 minutes	28	23	$100.00	$85.09
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	18	11	$100.00	$49.89
99422 Online digital evaluation and management service for an established patient for up to 7 days, total time 11-20 minutes	16	15	$75.00	$24.04
69210 Removal of impacted ear wax	14	12	$70.00	$46.00

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	354	150	$125.00	$91.34
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	170	170	$250.00	$132.73
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	113	107	$140.00	$130.74
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	74	19	$35.00	$14.60
J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg	68	14	$6.00	$1.71
99441 Telephone medical discussion with physician, 5-10 minutes	42	37	$66.07	$53.15
G0444 Annual depression screening, 5 to 15 minutes	40	40	$35.00	$18.49
99442 Telephone medical discussion with physician, 11-20 minutes	28	25	$95.18	$88.39
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	20	14	$100.00	$54.24

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	414	157	$117.52	$91.67
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	199	199	$250.00	$136.28
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	109	26	$35.00	$14.50
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	88	78	$140.00	$131.49
J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg	84	16	$6.00	$1.96
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	29	21	$59.83	$52.11
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	22	15	$100.00	$54.39
99441 Telephone medical discussion with physician, 5-10 minutes	21	19	$32.86	$31.65
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	14	14	$250.00	$172.27
69210 Removal of impacted ear wax	13	11	$70.00	$50.38
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	11	11	$250.00	$172.62

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	536	210	$98.87	$73.06
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	223	223	$250.00	$118.77
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	194	179	$138.61	$109.63
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	150	36	$35.00	$14.58
J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg	124	25	$6.00	$2.00
36415 Insertion of needle into vein for collection of blood sample	112	96	$11.50	$2.91
G0008 Administration of influenza virus vaccine	105	105	$35.00	$17.06
90653 Vaccine for influenza for injection into muscle	93	93	$62.26	$59.52
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	69	62	$20.00	$7.61
80061 Blood test, lipids (cholesterol and triglycerides)	66	65	$40.00	$13.12
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	45	40	$59.11	$38.31
83735 Magnesium level	40	40	$20.00	$6.57
84443 Blood test, thyroid stimulating hormone (TSH)	39	39	$50.00	$16.46
82306 Vitamin d-3 level	39	39	$75.00	$29.01
83090 Homocysteine (amino acid) level	35	35	$55.00	$17.56
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	31	18	$40.00	$23.10
82607 Cyanocobalamin (vitamin B-12) level	28	28	$40.00	$14.78
93000 Routine ekg using at least 12 leads including interpretation and report	26	26	$55.00	$17.60
81003 Automated urinalysis test	25	24	$5.00	$2.20
69210 Removal of impacted ear wax	24	22	$70.00	$50.90
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	22	17	$100.00	$55.12
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	17	17	$250.00	$163.28
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	14	14	$250.00	$174.96

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	794	261	$90.50	$75.17
36415 Insertion of needle into vein for collection of blood sample	689	366	$11.50	$2.92
80061 Blood test, lipids (cholesterol and triglycerides)	472	309	$40.00	$14.54
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	441	324	$20.00	$8.38
82306 Vitamin d-3 level	344	306	$75.00	$32.23
84443 Blood test, thyroid stimulating hormone (TSH)	330	302	$50.00	$18.26
83735 Magnesium level	299	276	$20.00	$7.29
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	293	74	$35.00	$16.83
82607 Cyanocobalamin (vitamin B-12) level	286	265	$40.00	$16.41
83090 Homocysteine (amino acid) level	280	262	$55.00	$18.37
86141 Measurement c-reactive protein for detection of infection or inflammation, high sensitivity	270	255	$25.00	$14.10
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	247	247	$250.00	$117.33
G0008 Administration of influenza virus vaccine	242	238	$34.96	$16.66
J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg	229	44	$6.00	$1.80
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	215	202	$130.00	$110.52
81003 Automated urinalysis test	181	169	$5.11	$2.42
93000 Routine ekg using at least 12 leads including interpretation and report	177	173	$55.00	$17.38
90653 Vaccine for influenza for injection into muscle	170	170	$60.00	$58.00
84152 PSA (prostate specific antigen) measurement	102	101	$50.00	$20.03
90674 Influenza vaccine, quadrivalent derived from cell cultures, preservative and antibiotic free	74	73	$35.07	$27.25
69210 Removal of impacted ear wax	57	49	$70.00	$49.05
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	31	17	$60.00	$45.73
87804 Detection test by immunoassay with direct visual observation for influenza virus	26	13	$30.00	$16.22
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	25	18	$100.00	$54.12
99496 Transitional care management services for problem of high complexity	17	15	$350.00	$234.84
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	16	16	$250.00	$168.48
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	14	14	$250.00	$173.97
87880 Detection test by immunoassay with direct visual observation for streptococcus, group a (strep)	14	14	$45.00	$16.20
94010 Test to measure expiratory airflow and volume	11	11	$75.00	$35.75
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$200.00	$168.81

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	807	264	$89.99	$71.46
36415 Insertion of needle into vein for collection of blood sample	670	363	$11.50	$2.93
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	456	338	$19.99	$9.38
84443 Blood test, thyroid stimulating hormone (TSH)	324	304	$49.88	$20.33
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	319	56	$35.00	$19.90
82306 Vitamin d-3 level	315	297	$75.00	$35.82
82607 Cyanocobalamin (vitamin B-12) level	284	272	$40.00	$18.24
J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg	269	45	$6.00	$1.95
G0008 Administration of influenza virus vaccine	257	254	$35.00	$20.47
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	246	246	$250.00	$113.85
90653 Vaccine for influenza for injection into muscle	232	232	$59.16	$52.92
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	231	225	$130.15	$105.78
80061 Blood test, lipids (cholesterol and triglycerides)	230	190	$39.93	$16.13
93000 Routine ekg using at least 12 leads including interpretation and report	168	166	$55.00	$16.78
86141 Measurement c-reactive protein for detection of infection or inflammation, high sensitivity	144	142	$25.00	$15.66
85610 Blood test, clotting time	116	11	$15.00	$4.75
83735 Magnesium level	110	108	$20.00	$8.10
83090 Homocysteine (amino acid) level	107	106	$55.00	$20.41
81000 Manual urinalysis test with examination using microscope, non-automated	99	94	$10.00	$3.94
84152 PSA (prostate specific antigen) measurement	94	91	$44.68	$22.26
81003 Automated urinalysis test	78	77	$6.60	$2.71
69210 Removal of impacted ear wax	70	57	$70.00	$48.55
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	66	36	$59.92	$42.97
83036 Hemoglobin A1C level	45	44	$25.00	$11.75
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	34	13	$40.00	$20.89
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	27	27	$250.00	$167.89
81002 Urinalysis, manual test	27	27	$5.19	$3.41
90674 Influenza vaccine, quadrivalent derived from cell cultures, preservative and antibiotic free	26	26	$33.46	$23.57
87086 Bacterial colony count, urine	22	19	$25.00	$9.76
99495 Transitional care management services for problem of at least moderate complexity	18	17	$350.00	$160.33
87430 Detection test by immunoassay technique for streptococcus, group a (strep)	18	17	$45.00	$16.47
87070 Bacterial culture	17	16	$25.00	$10.43
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	17	16	$100.00	$52.77
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	15	15	$250.00	$160.41
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	14	14	$200.00	$163.29
83540 Iron level	12	11	$20.00	$7.83
83550 Iron binding capacity	12	11	$40.00	$10.57

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	858	259	$89.49	$70.42
36415 Insertion of needle into vein for collection of blood sample	654	337	$11.51	$2.93
80061 Blood test, lipids (cholesterol and triglycerides)	520	318	$40.00	$17.03
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	419	313	$20.00	$10.42
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	327	61	$35.00	$24.40
84443 Blood test, thyroid stimulating hormone (TSH)	305	291	$50.00	$22.44
82306 Vitamin d-3 level	302	288	$75.00	$39.67
J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg	290	55	$6.00	$2.99
82607 Cyanocobalamin (vitamin B-12) level	281	271	$40.00	$20.27
G0008 Administration of influenza virus vaccine	265	263	$34.55	$25.25
83735 Magnesium level	262	259	$20.32	$8.98
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	243	233	$130.49	$103.54
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	235	235	$250.00	$109.98
81000 Manual urinalysis test with examination using microscope, non-automated	220	188	$10.00	$4.20
83036 Hemoglobin A1C level	216	111	$25.00	$13.05
86141 Measurement c-reactive protein for detection of infection or inflammation, high sensitivity	209	203	$25.00	$17.40
83090 Homocysteine (amino acid) level	208	204	$55.00	$22.68
90653 Vaccine for influenza for injection into muscle	203	203	$53.74	$49.08
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	198	62	$60.00	$41.99
93000 Routine ekg using at least 12 leads including interpretation and report	171	169	$55.00	$16.34
Q9966 Low osmolar contrast material, 200-299 mg/ml iodine concentration, per ml	104	12	$5.00	$0.20
85610 Blood test, clotting time	102	12	$15.00	$5.28
84152 PSA (prostate specific antigen) measurement	100	98	$40.00	$24.24
84436 Thyroxine (thyroid chemical), total	75	72	$20.00	$9.23
84479 Thyroid hormone evaluation	74	72	$20.00	$8.69
83550 Iron binding capacity	72	40	$40.00	$11.58
83540 Iron level	72	40	$20.00	$8.70
77080 Dxa bone density measurement of hip, pelvis, spine	67	67	$175.00	$38.88
69210 Removal of impacted ear wax	61	50	$70.00	$47.19
99347 Residence visit for established patient with straightforward medical decision making, per day, if using time, at least 15 minutes	57	27	$100.00	$53.40
90674 Influenza vaccine, quadrivalent derived from cell cultures, preservative and antibiotic free	55	55	$30.00	$23.57
87086 Bacterial colony count, urine	49	34	$25.00	$10.85
J7321 Hyaluronan or derivative, hyalgan, supartz or visco-3, for intra-articular injection, per dose	45	12	$100.00	$84.67
20610 Aspiration and/or injection of fluid from large joint	42	12	$75.00	$56.97
77002 Fluoroscopic guidance for needle placement	40	12	$125.00	$88.97
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	36	27	$100.00	$52.07
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	36	15	$40.00	$19.33
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	34	34	$200.00	$159.66
80053 Blood test, comprehensive group of blood chemicals	33	26	$75.00	$13.93
87430 Detection test by immunoassay technique for streptococcus, group a (strep)	29	29	$45.00	$16.11
73562 X-ray of knee, 3 views	28	16	$60.00	$30.86
87070 Bacterial culture	27	27	$25.00	$11.58
87804 Detection test by immunoassay with direct visual observation for influenza virus	26	13	$30.00	$16.11
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	20	20	$250.00	$163.78
83721 Ldl cholesterol level	18	18	$40.00	$12.83
83718 Hdl cholesterol level	18	18	$25.00	$11.02
82947 Blood glucose (sugar) level	15	14	$20.00	$5.19
80048 Blood test, basic group of blood chemicals (calcium, total)	14	12	$75.00	$11.62

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License MI 4301030901

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

11 Associated Practitioners

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Internal Medicine

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Doctor of Medicine (M.D.)

Dr. Naveed Aslam , MD

Internal Medicine - Medical Oncology

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Doctor of Medicine (M.D.)

Kathleen Riley

Acupuncturist

NPI 1255886545

Dr. Hadeel Kado , MD

Family Medicine

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Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events

✅

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location July 08, 2007

Registered at 1380 COOLIDGE HWY, SUITE 100, TROY, MI 480847018 (Tel: 2482884000)

📍

Updated Business Mailing Address July 08, 2007

Registered at 1380 COOLIDGE HWY, SUITE 100, TROY, MI 480847018 (Tel: 2482884000)

👤

Provider Name / Credentials Updated July 08, 2007

Recorded as JAMES MACKENZIE, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Internal Medicine (License #4301030901 in MI)

🟢

Initial NPI Registration & Enumeration November 02, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1548251168

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: November 02, 2005

Last Update: July 13, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

1380 Coolidge Hwy, Suite 100

Troy, MI 480847018

Phone: 2482884000

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.