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Internal Medicine Providers in Grass Valley, CA

Browse 22 Internal Medicine providers listed in NPPES with a practice address in Grass Valley, California.

22 Healthcare Providers

How Grass Valley compares with the U.S.

Grass Valley has 156 clinicians in Internal Medicine per 100,000 residents, 3.5 times the U.S. rate of 44.

That is 22 active clinicians in Internal Medicine with a practice address in Grass Valley, for a population of 14,113.

The California rate is 45 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

100% of clinicians in Internal Medicine in Grass Valley listed in the CMS Medicare file (11 of 11) accept Medicare assignment. That is similar to the California share of 96%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

36% of clinicians in Internal Medicine in Grass Valley listed in the CMS Medicare file (4 of 11) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is similar to the California share of 38%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine practitioners in Grass Valley, CA

Source: CMS PECOS
PECOS Enrolled Specialists 14 In Grass Valley, CA
Part B Lab & Imaging Eligible 16 Diagnostic Referrals
DME Ordering Eligible 16 Durable Medical Equipment
Home Health Agency Referrals 16 HHA Ordering Eligible
Showing 1โ€“20 of 22 providers
With recent CMS data first, then Aโ€“Z

Dr. Michael D Andya , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
402 S Auburn St, Grass Valley, CA 959457226
Phone: 5302732221
NPI Identifier 1760428452
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Dr. Nicholas Dean Browning , MD

Internal Medicine

Active NPI Status
342 Pleasant St, #1, Grass Valley, CA 959456662
Phone: 5302281690
NPI Identifier 1487610309
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Dr. Stuart Benjamin Campbell , MD

Internal Medicine

Active NPI Status
155 Glasson Way, Grass Valley, CA 959455723
Phone: 5302746085
NPI Identifier 1306842588
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Dr. Simon Chi Yan Chan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
150 Catherine Ln, Suite F, Grass Valley, CA 959455719
Phone: 5304779100
NPI Identifier 1063431179
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Dr. Sherilynn E. Cooke , MD

Internal Medicine

Active NPI Status
500 Crown Point Cir Ste 110, Grass Valley, CA 959459561
Phone: 5302651450
NPI Identifier 1427136506
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Dr. Fouzia Godil , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Sierra College Dr, Ste.105, Grass Valley, CA 959455082
Phone: 5302733377
NPI Identifier 1942268792
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Dr. Rajpreet Singh Grewal , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
155 Glasson Way, Grass Valley, CA 959455723
Phone: 5302746761
NPI Identifier 1053723742
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Dr. Eric John Holtrop , MD

Internal Medicine

Active NPI Status
280 Sierra College Dr, Suite 120, Grass Valley, CA 959455763
Phone: 5304774480
NPI Identifier 1881790459
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Dr. Kisha Christine Hughes , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
280 Sierra College Dr, Suite 120, Grass Valley, CA 959455763
Phone: 5304774480
NPI Identifier 1265627160
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Dr. Andrew Samuel Ing , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
155 Glasson Way, Grass Valley, CA 959455723
Phone: 5302633770
NPI Identifier 1053409714
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Dr. Thomas I Kanomata , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
280 Sierra College Dr, Suite 120, Grass Valley, CA 959455763
Phone: 5304774480
NPI Identifier 1659336543
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Dr. Mehwish K Khan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
300 Sierra College Dr Ste 150, Grass Valley, CA 959455083
Phone: 5302746600
NPI Identifier 1174721385
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Dr. Jacob Sloan Kopp , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
155 Glasson Way, Grass Valley, CA 959455723
Phone: 5302746761
NPI Identifier 1073054409
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Dr. Ganesh Arun Kulkarni , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
155 Glasson Way, Grass Valley, CA 959455723
Phone: 5086545160
NPI Identifier 1376807990
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Dr. Walter Scott Miller , MD

Internal Medicine

Active NPI Status
10042 Wolf Road, Suite A, Grass Valley, CA 95949
Phone: 5302688778
NPI Identifier 1013985340
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Dr. Michelle-Linh Nguyen , MD

Internal Medicine

Active NPI Status
101 W. Mcknight Way Ste B, #260, Grass Valley, CA 959499613
Phone: 5305521039
NPI Identifier 1114447596
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Dr. Jonathan Lacey Pierce , MD

Internal Medicine

Active NPI Status
470 So Auburn St, Suite E, Grass Valley, CA 95945
Phone: 5302739992
NPI Identifier 1578650594
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Dr. Charles Shang , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
136 Glasson Way, Grass Valley, CA 959455706
Phone: 5302728452
NPI Identifier 1104805902
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Dr. Nancy A Bleile , MD

Internal Medicine

Active NPI Status
2090 Nevada City Hwy, Grass Valley, CA 959457702
Phone: 5302745020
NPI Identifier 1144246158
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Dr. Christine Mueller Newsom , MD

Internal Medicine

Active NPI Status
409 Joerschke Dr, Grass Valley, CA 959455288
Phone: 5304774480
NPI Identifier 1407822943
View Full Profile

Frequently Asked Questions about Internal Medicine in Grass Valley

How do I check a Internal Medicine practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the California licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.

Other Specialties in Grass Valley

Internal Medicine Providers in Other California Cities

Cities with the most listed practitioners first.