Active NPI 1144220369 Individual Practitioner Male Practitioner

Dr. John P Williams , DO

Internal Medicine • Willits, CA

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. John Williams, DO is a certified Internal Medicine practicing in Willits, CA. With approximately 37 years of clinical experience since graduating from University Of New England, College Of Osteo Medicine in 1989, Dr. Williams delivers high-quality medical care to the local community at 1712 S MAIN ST.

Dr. Williams 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, testing for presence of drug, read by direct observation, hemoglobin a1c level. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1712 S Main St
Ste C

Willits, CA 954904400

Telephone 7074595585

Fax 7074593548

Medicare Profile & Education

Medical School

University Of New England, College Of Osteo Medicine

Graduation Year

1989

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Willits, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

37 Yrs -5.5 yrs vs City Avg

City Avg: 42.5 Yrs

State Avg: 26.6 Yrs

Regional Practice Density

6 Specialists

Practicing in Willits, CA (18502 Statewide)

Telehealth Adoption Rate

16.7% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

36.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Williams (37 Years) 37 Yrs

Willits Specialty Average (42.5 Years) 42.5 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	832	235	$200.00	$124.32
80305 Testing for presence of drug, read by direct observation	334	78	$125.00	$12.35
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	235	134	$227.00	$174.39
99213 Established patient office or other outpatient visit, typically 15 minutes	176	108	$115.00	$87.64
83036 Hemoglobin A1C level	58	45	$20.00	$9.52
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	51	23	$211.00	$147.11
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	28	22	$69.00	$55.39
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	28	19	$211.00	$147.56
81002 Urinalysis, manual test	27	20	$15.00	$3.41
98925 Osteopathic manipulative treatment, 1-2 body regions	25	19	$50.00	$30.60
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	22	15	$50.00	$14.13
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	22	22	$322.00	$215.12
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	18	18	$184.00	$123.27
36415 Insertion of needle into vein for collection of blood sample	18	17	$15.00	$8.65

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	963	205	$200.00	$130.22
80305 Testing for presence of drug, read by direct observation	460	82	$125.00	$12.35
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	244	132	$227.00	$181.99
99213 Established patient office or other outpatient visit, typically 15 minutes	175	98	$115.00	$92.25
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	173	51	$211.00	$154.65
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	87	67	$69.00	$58.20
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	85	42	$143.00	$107.99
99306 Initial nursing facility visit, typically 45 minutes per day	54	43	$259.00	$183.28
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	54	24	$211.00	$154.55
83036 Hemoglobin A1C level	48	35	$20.00	$9.52
98925 Osteopathic manipulative treatment, 1-2 body regions	36	24	$50.00	$31.97
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	33	14	$143.00	$107.78
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	23	17	$50.00	$14.61
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	23	23	$322.00	$223.46
96127 Assessment of emotional or behavioral problems	22	16	$10.00	$4.88
17111 Destruction of skin growth, 15 or more growths	21	11	$211.00	$139.66
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	20	20	$184.00	$131.91
99306 Initial nursing facility visit, typically 45 minutes per day	19	18	$259.00	$183.13
81002 Urinalysis, manual test	18	15	$15.00	$3.41
82043 Urine microalbumin (protein) level	17	15	$9.00	$5.66
36415 Insertion of needle into vein for collection of blood sample	17	17	$15.00	$8.40

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	1,139	226	$200.00	$131.98
80305 Testing for presence of drug, read by direct observation	626	101	$125.00	$12.43
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	400	172	$227.24	$185.23
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	154	59	$142.67	$91.86
99213 Established patient office or other outpatient visit, typically 15 minutes	151	87	$115.00	$93.54
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	149	26	$143.00	$92.18
98925 Osteopathic manipulative treatment, 1-2 body regions	93	45	$50.00	$32.61
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	91	39	$210.20	$135.29
99306 Initial nursing facility visit, typically 45 minutes per day	88	82	$257.03	$166.57
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	83	49	$69.00	$58.47
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	62	19	$211.00	$135.56
81002 Urinalysis, manual test	51	37	$15.00	$3.44
36415 Insertion of needle into vein for collection of blood sample	50	46	$15.00	$2.96
83036 Hemoglobin A1C level	44	37	$20.00	$9.41
96127 Assessment of emotional or behavioral problems	31	27	$10.00	$4.95
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	29	17	$50.00	$14.97
93000 Routine ekg using at least 12 leads including interpretation and report	22	19	$27.00	$14.78
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	21	21	$322.00	$227.16
99306 Initial nursing facility visit, typically 45 minutes per day	14	12	$259.00	$167.59
J1040 Injection, methylprednisolone acetate, 80 mg	14	13	$50.00	$10.90
20610 Aspiration and/or injection of fluid from large joint	12	12	$100.00	$67.33

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	1,417	250	$169.09	$130.90
80305 Testing for presence of drug, read by direct observation	694	105	$125.00	$12.58
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	320	144	$227.00	$184.17
99213 Established patient office or other outpatient visit, typically 15 minutes	271	133	$115.00	$92.72
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	175	38	$143.00	$93.30
J1885 Injection, ketorolac tromethamine, per 15 mg	109	16	$40.00	$0.47
36415 Insertion of needle into vein for collection of blood sample	91	76	$15.00	$2.97
98925 Osteopathic manipulative treatment, 1-2 body regions	87	48	$50.00	$32.74
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	82	32	$50.00	$14.85
J1030 Injection, methylprednisolone acetate, 40 mg	81	21	$25.00	$5.66
83036 Hemoglobin A1C level	73	51	$20.00	$9.60
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	70	38	$69.00	$58.83
96127 Assessment of emotional or behavioral problems	67	39	$10.00	$4.99
81002 Urinalysis, manual test	45	32	$15.00	$3.48
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	42	16	$108.00	$70.57
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	36	18	$211.00	$138.25
99306 Initial nursing facility visit, typically 45 minutes per day	31	29	$259.00	$169.94
20610 Aspiration and/or injection of fluid from large joint	28	22	$100.00	$70.26
17110 Destruction of up to 14 skin growths	19	12	$178.00	$118.63
93000 Routine ekg using at least 12 leads including interpretation and report	19	18	$27.00	$15.43
99407 Smoking and tobacco use intensive counseling, more than 10 minutes	16	11	$17.00	$17.00
82270 Stool analysis for blood to screen for colon tumors	16	16	$15.00	$4.38
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	14	14	$258.00	$173.77
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	14	14	$322.00	$229.24

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	1,048	225	$169.00	$103.32
99213 Established patient office or other outpatient visit, typically 15 minutes	635	216	$115.00	$69.68
80305 Testing for presence of drug, read by direct observation	322	97	$125.00	$12.36
96127 Assessment of emotional or behavioral problems	228	100	$10.00	$5.00
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	155	96	$227.00	$143.82
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	116	33	$143.00	$91.96
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	101	54	$69.00	$45.62
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	78	25	$50.00	$14.38
98925 Osteopathic manipulative treatment, 1-2 body regions	77	56	$50.00	$31.04
85610 Blood test, clotting time	50	12	$8.00	$4.25
36415 Insertion of needle into vein for collection of blood sample	49	44	$15.00	$2.98
J1040 Injection, methylprednisolone acetate, 80 mg	45	29	$50.00	$11.51
81002 Urinalysis, manual test	40	26	$15.00	$3.46
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	35	23	$108.00	$68.99
20610 Aspiration and/or injection of fluid from large joint	28	20	$100.00	$62.04
83036 Hemoglobin A1C level	24	19	$20.00	$9.59
99306 Initial nursing facility visit, typically 45 minutes per day	14	12	$259.00	$165.86
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$258.00	$164.88

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	1,709	278	$169.00	$111.99
96127 Assessment of emotional or behavioral problems	781	146	$10.00	$5.53
99213 Established patient office or other outpatient visit, typically 15 minutes	566	192	$115.00	$76.53
80305 Testing for presence of drug, read by direct observation	539	125	$125.00	$12.35
98925 Osteopathic manipulative treatment, 1-2 body regions	229	84	$50.00	$32.51
J1885 Injection, ketorolac tromethamine, per 15 mg	214	29	$40.00	$0.50
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	189	42	$143.00	$93.43
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	160	102	$227.00	$148.76
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	158	53	$50.00	$17.42
36415 Insertion of needle into vein for collection of blood sample	114	94	$15.00	$2.94
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	82	56	$69.00	$46.79
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	78	19	$32.00	$23.91
85610 Blood test, clotting time	69	12	$8.00	$4.28
81002 Urinalysis, manual test	65	39	$15.00	$3.41
J1040 Injection, methylprednisolone acetate, 80 mg	57	28	$50.00	$12.16
83036 Hemoglobin A1C level	41	33	$20.00	$10.57
99497 Advance care planning, first 30 minutes	37	37	$132.00	$86.72
99306 Initial nursing facility visit, typically 45 minutes per day	32	31	$259.00	$169.71
98926 Osteopathic manipulative treatment, 3-4 body regions	31	12	$72.00	$46.68
93000 Routine ekg using at least 12 leads including interpretation and report	29	26	$27.00	$17.61
20610 Aspiration and/or injection of fluid from large joint	27	22	$100.00	$63.87
94010 Test to measure expiratory airflow and volume	24	22	$58.00	$37.42
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	24	23	$203.00	$132.56
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	23	11	$211.00	$138.08
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	20	20	$258.00	$168.61
17110 Destruction of up to 14 skin growths	13	13	$178.00	$116.24

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	1,543	267	$169.00	$104.86
99213 Established patient office or other outpatient visit, typically 15 minutes	647	213	$115.00	$70.94
80305 Testing for presence of drug, read by direct observation	514	133	$125.00	$13.17
98925 Osteopathic manipulative treatment, 1-2 body regions	331	102	$50.00	$30.91
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	226	57	$50.00	$20.37
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	213	34	$143.00	$88.51
J1885 Injection, ketorolac tromethamine, per 15 mg	156	30	$29.56	$0.57
85610 Blood test, clotting time	118	17	$8.00	$4.75
J1040 Injection, methylprednisolone acetate, 80 mg	113	46	$50.00	$12.98
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	111	68	$225.99	$140.72
96127 Assessment of emotional or behavioral problems	106	97	$10.00	$6.30
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	103	21	$32.00	$21.43
98926 Osteopathic manipulative treatment, 3-4 body regions	76	43	$72.00	$44.77
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	75	45	$68.51	$42.91
94010 Test to measure expiratory airflow and volume	52	33	$58.00	$35.96
20610 Aspiration and/or injection of fluid from large joint	51	35	$98.35	$58.31
83036 Hemoglobin A1C level	45	39	$20.00	$11.75
81002 Urinalysis, manual test	42	31	$12.38	$3.41
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	31	14	$108.00	$66.97
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	22	22	$258.00	$160.13
83037 Hemoglobin a1c level, by device for home use	19	17	$16.00	$11.75
93000 Routine ekg using at least 12 leads including interpretation and report	16	15	$27.00	$16.59
99306 Initial nursing facility visit, typically 45 minutes per day	15	15	$259.00	$161.08
99305 Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes	14	13	$203.00	$126.02
82270 Stool analysis for blood to screen for colon tumors	13	13	$10.08	$4.29
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	12	12	$169.00	$105.16

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J1071 Injection, testosterone cypionate, 1 mg	18,830	12	$0.24	$0.02
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	1,068	226	$169.05	$103.85
99213 Established patient office or other outpatient visit, typically 15 minutes	846	245	$115.00	$70.62
80305 Testing for presence of drug, read by direct observation	304	113	$125.00	$14.66
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	192	49	$50.00	$25.24
85610 Blood test, clotting time	163	18	$8.00	$5.28
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	126	31	$143.00	$87.68
98925 Osteopathic manipulative treatment, 1-2 body regions	117	66	$50.00	$30.46
J0696 Injection, ceftriaxone sodium, per 250 mg	113	11	$3.00	$0.62
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	107	33	$69.00	$42.39
99308 Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes	81	26	$108.00	$66.49
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	77	62	$227.00	$139.59
J1885 Injection, ketorolac tromethamine, per 15 mg	67	14	$3.00	$0.64
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	66	19	$32.00	$19.88
J1040 Injection, methylprednisolone acetate, 80 mg	45	24	$50.00	$11.37
J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg	42	11	$67.62	$2.83
81002 Urinalysis, manual test	28	16	$5.00	$3.43
20610 Aspiration and/or injection of fluid from large joint	26	18	$94.00	$61.44
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$258.00	$158.50
98926 Osteopathic manipulative treatment, 3-4 body regions	15	11	$72.00	$44.07
93000 Routine ekg using at least 12 leads including interpretation and report	14	14	$27.00	$16.49
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	13	11	$211.00	$130.46
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	12	12	$314.00	$179.26
99306 Initial nursing facility visit, typically 45 minutes per day	12	11	$259.00	$159.39

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License CA 20A6027

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

00AX60271 (CA)

Commercial Insurance / Payer ID Blue Shield Provider #

020A60270 (CA)

Commercial Insurance / Payer ID Railroad Medicare

110228689 (CA)

Commercial Insurance / Payer ID Blue Cross Provider #

20A6027 (CA)

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active March 07, 2012

NPI status registered as active in NPPES database

📍

Updated Practice Location March 07, 2012

Registered at 1712 S MAIN ST, STE C, WILLITS, CA 954904400 (Tel: 7074595585)

📍

Updated Business Mailing Address March 07, 2012

Registered at 1712 S MAIN ST, STE C, WILLITS, CA 954904400 (Tel: 7074595585)

👤

Provider Name / Credentials Updated March 07, 2012

Recorded as JOHN WILLIAMS, D.O.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 07, 2012

Internal Medicine (License #20A6027 in CA)

🟢

Initial NPI Registration & Enumeration July 29, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1144220369

Entity Type:

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

Enumeration Date: July 29, 2005

Last Update: December 19, 2018

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

1712 S Main St, Ste C

Willits, CA 954904400

Phone: 7074595585

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

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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.