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Internal Medicine Providers in Lewiston, ME

Browse 30 Internal Medicine providers listed in NPPES with a practice address in Lewiston, Maine.

30 Healthcare Providers

How Lewiston compares with the U.S.

Lewiston has 78 clinicians in Internal Medicine per 100,000 residents, about 1.8 times the U.S. rate of 44.

That is 30 active clinicians in Internal Medicine with a practice address in Lewiston, for a population of 38,324.

The Maine rate is 43 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 Lewiston listed in the CMS Medicare file (17 of 17) accept Medicare assignment. That is similar to the Maine 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.

6% of clinicians in Internal Medicine in Lewiston listed in the CMS Medicare file (1 of 17) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the Maine share of 24%.

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 Lewiston, ME

Source: CMS PECOS
PECOS Enrolled Specialists 22 In Lewiston, ME
Part B Lab & Imaging Eligible 22 Diagnostic Referrals
DME Ordering Eligible 23 Durable Medical Equipment
Home Health Agency Referrals 22 HHA Ordering Eligible
Showing 1โ€“20 of 30 providers
With recent CMS data first, then Aโ€“Z

Dr. Nancy Asamoa , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Main St, Lewiston, ME 042407041
Phone: 2077950111
NPI Identifier 1023135639
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Dr. Stephen Douglas Boyd , MD

Internal Medicine

Active NPI Status
15 Challenger Dr, Lewiston, ME 042401041
Phone: 2073302700
NPI Identifier 1326260555
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Dr. Jeffrey L Brown , MD

Internal Medicine

Active NPI Status
99 Campus Avenue, Suite 201, Lewiston, ME 04240
Phone: 2077778810
NPI Identifier 1942237490
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Bruce Condit

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Main St, Lewiston, ME 042407007
Phone: 2077950111
NPI Identifier 1669451209
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Dr. John D Dickens , MD, MPH, SFHM

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Main St, Lewiston, ME 042407007
Phone: 2077950111
NPI Identifier 1053390609
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Dr. Thomas Aquinas Garbarino , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Main St, Lewiston, ME 042407041
Phone: 2077950111
NPI Identifier 1366009219
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Claudia Geyer

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Main St, Lewiston, ME 042407007
Phone: 2077955709
NPI Identifier 1689653230
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Dr. R Scott Hanson , MD, MPH

Internal Medicine

Active NPI Status
15 Challenger Dr, Lewiston, ME 042401041
Phone: 2077534601
NPI Identifier 1457356990
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Dr. Richard K Kappelmann , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
100 Campus Ave Ste 104, Lewiston, ME 042406049
Phone: 2077774100
NPI Identifier 1407881121
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Dr. Rachel Anne Kerner , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
102 Campus Ave, Lewiston, ME 042406019
Phone: 2077774232
NPI Identifier 1184718751
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Dr. Evgeni Kontrient , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Main St, Lewiston, ME 042407027
Phone: 2077952905
NPI Identifier 1245583228
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Dr. Chad Alan Lachance , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Main St, Lewiston, ME 042407027
Phone: 2077950111
NPI Identifier 1558576462
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Dr. Katarina Latkovich , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
12 High St, Ste 400 Central Maine Internal Medicine, Lewiston, ME 04240
Phone: 2077955700
NPI Identifier 1902878499
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William Lee

Internal Medicine

Active NPI Status
12 High St, Ste 400, Lewiston, ME 042407634
Phone: 2077955700
NPI Identifier 1073593760
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Dr. Darleen Miller , MD

Internal Medicine

Active NPI Status
100 Campus Ave, Suite 201, Lewiston, ME 042406040
Phone: 2077774040
NPI Identifier 1285658997
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Dr. Asha Hassan Mohamud , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Main St, Lewiston, ME 042407041
Phone: 2077950111
NPI Identifier 1003493081
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Dr. Deborah J Puckhaber , MD

Internal Medicine

Active NPI Status
300 Main St, Central Maine Medical Center, Lewiston, ME 042407027
Phone: 2077957575
NPI Identifier 1336207901
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Pamela Ross

Internal Medicine

Active NPI Status
12 High St, Ste 400, Lewiston, ME 042407634
Phone: 2077955700
NPI Identifier 1144200833
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Dr. Tiara Sanborn , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Main St, Lewiston, ME 042407027
Phone: 2077957575
NPI Identifier 1366708281
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Dr. Martha M Stagaman , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
300 Main St, Lewiston, ME 042407027
Phone: 2077957575
NPI Identifier 1033184072
View Full Profile

Frequently Asked Questions about Internal Medicine in Lewiston

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 Maine 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.