Active NPI 1487654091 Individual Practitioner Male Practitioner

Dr. Michael A Marshall , MD

Internal Medicine • Southfield, MI

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Michael Marshall, MD is a certified Internal Medicine practicing in Southfield, MI. With approximately 52 years of clinical experience since graduating from Wayne State University School Of Medicine in 1974, Dr. Marshall delivers high-quality medical care to the local community at 22255 GREENFIELD RD.

Dr. Marshall is affiliated with Henry Ford Health Providence Hospital and accepts Medicare assignment.

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, subsequent hospital care with moderate levelof medical decision making, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

22255 Greenfield Rd
410

Southfield, MI 480753710

Telephone 2488492850

Fax 2488495751

Associated Practice Facility / Clinic

🏢 Oncology Associates Pc Facility NPI 1194852798

Medicare Profile & Education

Medical School

Wayne State University School Of Medicine

Graduation Year

1974

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Southfield, MI

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

52 Yrs +23.0 yrs vs City Avg

City Avg: 29.0 Yrs

State Avg: 26.5 Yrs

Regional Practice Density

221 Specialists

Practicing in Southfield, MI (6010 Statewide)

Telehealth Adoption Rate

16.3% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

26.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Marshall (52 Years) 52 Yrs

Southfield Specialty Average (29.0 Years) 29.0 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
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	99	61	$124.00	$98.23
99213 Established patient office or other outpatient visit, typically 15 minutes	64	56	$84.00	$66.67
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	33	33	$210.00	$130.67
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	23	13	$100.00	$79.45
99231 Follow-up hospital inpatient care per day, typically 15 minutes	17	11	$60.00	$50.42

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	94	58	$124.00	$99.37
99213 Established patient office or other outpatient visit, typically 15 minutes	61	46	$84.00	$67.32
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	44	44	$210.00	$129.71

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	71	53	$124.00	$100.72
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	27	27	$210.00	$133.52
99213 Established patient office or other outpatient visit, typically 15 minutes	22	22	$84.00	$69.02

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	146	95	$116.98	$102.19
99213 Established patient office or other outpatient visit, typically 15 minutes	58	51	$80.14	$68.77
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	44	44	$210.00	$136.28
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	42	21	$100.00	$73.99
99231 Follow-up hospital inpatient care per day, typically 15 minutes	40	25	$60.00	$39.44
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	18	18	$263.00	$206.20
99442 Telephone medical discussion with physician, 11-20 minutes	17	16	$96.00	$70.72
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	17	15	$15.00	$8.59
99238 Hospital discharge day management, 30 minutes or less	14	14	$132.00	$71.29

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	147	99	$103.18	$82.71
99213 Established patient office or other outpatient visit, typically 15 minutes	69	61	$67.25	$53.94
99442 Telephone medical discussion with physician, 11-20 minutes	62	53	$86.15	$52.90
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	60	60	$203.40	$118.85
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	28	14	$100.00	$75.32
99443 Telephone medical discussion with physician, 21-30 minutes	20	20	$123.00	$80.03
99231 Follow-up hospital inpatient care per day, typically 15 minutes	18	11	$60.00	$41.41
99497 Advance care planning, first 30 minutes	15	15	$109.00	$82.45
99238 Hospital discharge day management, 30 minutes or less	13	13	$132.00	$75.83
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	11	11	$263.00	$211.38

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	283	177	$99.00	$81.10
99213 Established patient office or other outpatient visit, typically 15 minutes	112	95	$64.00	$52.73
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	53	53	$140.89	$117.63
99231 Follow-up hospital inpatient care per day, typically 15 minutes	43	22	$60.00	$40.72
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	26	25	$15.00	$8.75
99238 Hospital discharge day management, 30 minutes or less	25	25	$129.92	$75.04
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	20	14	$100.00	$74.93
99496 Transitional care management services for problem of high complexity	16	16	$197.50	$164.35
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	16	16	$209.25	$173.97
99495 Transitional care management services for problem of at least moderate complexity	14	13	$136.29	$113.26
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	11	11	$174.27	$141.84

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	256	152	$99.91	$81.02
99213 Established patient office or other outpatient visit, typically 15 minutes	94	83	$64.00	$53.02
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	62	62	$203.00	$174.83
G0444 Annual depression screening, 5 to 15 minutes	47	47	$12.00	$9.74
99231 Follow-up hospital inpatient care per day, typically 15 minutes	44	33	$60.00	$40.68
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	40	30	$100.00	$75.20
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	32	32	$133.00	$118.55
99238 Hospital discharge day management, 30 minutes or less	29	27	$128.00	$75.30
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	24	23	$15.00	$8.76
99495 Transitional care management services for problem of at least moderate complexity	19	19	$135.00	$113.42
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	18	18	$164.00	$135.13
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	17	17	$256.00	$209.81
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	15	15	$174.00	$142.00

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	257	164	$98.00	$80.20
99213 Established patient office or other outpatient visit, typically 15 minutes	158	139	$64.00	$52.08
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	82	82	$133.00	$116.68
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	62	41	$100.00	$73.50
99231 Follow-up hospital inpatient care per day, typically 15 minutes	59	40	$60.00	$40.20
G0444 Annual depression screening, 5 to 15 minutes	25	25	$12.00	$9.65
99238 Hospital discharge day management, 30 minutes or less	23	22	$128.00	$70.44
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	22	22	$203.00	$172.28
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	20	20	$138.00	$113.49
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	18	17	$15.00	$8.65
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	17	13	$32.00	$26.19
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	14	14	$174.00	$131.66
99496 Transitional care management services for problem of high complexity	13	11	$196.00	$162.68
99495 Transitional care management services for problem of at least moderate complexity	11	11	$135.00	$112.27

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License MI 4301035094

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.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

448574110 (MI)

Hospital & Practice Group Affiliations

Henry Ford Health Providence Hospital

16001 W 9 Mile Rd 3rd Floor, Southfield, MI 480754818

Phone: 2488496033

Henry Ford Health Providence Hospital

16001 W 9 Mile Rd 3rd Fl, Southfield, MI 480754818

Phone: 2488496033

Henry Ford Health Providence Hospital

16001 W 9 Mile Rd, Southfield, MI 480754818

Phone: 2484243000

Henry Ford Health Providence Hospital

22250 Providence Dr, Southfield, MI 480756211

Practice Associates & Co-Workers

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

1 Associated Practitioners

Dr. Michael Williams , MD

Internal Medicine

NPI 1841291325

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 February 24, 2011

NPI status registered as active in NPPES database

📍

Updated Practice Location February 24, 2011

Registered at 22255 GREENFIELD RD, 410, SOUTHFIELD, MI 480753710 (Tel: 2488492850)

📍

Updated Business Mailing Address February 24, 2011

Registered at 15990 W 9 MILE RD, SOUTHFIELD, MI 480754826 (Tel: 2488494226)

👤

Provider Name / Credentials Updated February 24, 2011

Recorded as MICHAEL MARSHALL, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) February 24, 2011

Internal Medicine (License #4301035094 in MI)

🟢

Initial NPI Registration & Enumeration July 26, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1487654091

Entity Type:

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

Enumeration Date: July 26, 2005

Last Update: February 24, 2011

Sole Proprietor: No

Update or Correct Profile

Mailing Address

15990 W 9 Mile Rd

Southfield, MI 480754826

Phone: 2488494226

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.