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Internal Medicine Providers in Walla Walla, WA

Browse 37 Internal Medicine providers listed in NPPES with a practice address in Walla Walla, Washington.

37 Healthcare Providers

How Walla Walla compares with the U.S.

Walla Walla has 109 clinicians in Internal Medicine per 100,000 residents, 2.5 times the U.S. rate of 44.

That is 37 active clinicians in Internal Medicine with a practice address in Walla Walla, for a population of 33,925.

The Washington rate is 39 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 Walla Walla listed in the CMS Medicare file (16 of 16) accept Medicare assignment. That is similar to the Washington share of 97%.

Only 16 of 37 active clinicians in Internal Medicine in Walla Walla appear in the CMS Medicare file, so this share describes that smaller group.

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.

25% of clinicians in Internal Medicine in Walla Walla listed in the CMS Medicare file (4 of 16) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the Washington 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 Walla Walla, WA

Source: CMS PECOS
PECOS Enrolled Specialists 19 In Walla Walla, WA
Part B Lab & Imaging Eligible 18 Diagnostic Referrals
DME Ordering Eligible 22 Durable Medical Equipment
Home Health Agency Referrals 18 HHA Ordering Eligible
Showing 1โ€“20 of 37 providers
With recent CMS data first, then Aโ€“Z

Dr. Mohammed Omar Ahmed , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
401 W Poplar St, Walla Walla, WA 99362
Phone: 5098973320
NPI Identifier 1659756443
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Dr. Kevin R Andrews , MD

Internal Medicine

Active NPI Status
55 W Tietan St, Walla Walla, WA 993624445
Phone: 5095253720
NPI Identifier 1174513873
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Dr. Delwyn Richard Baker , MD

Internal Medicine

Active NPI Status
77 Wainwright Drive, Walla Walla, WA 99362
Phone: 5095255200
NPI Identifier 1023108297
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Dr. Eric M Ball , MD

Internal Medicine

Active NPI Status
55 W Tietan St, Walla Walla, WA 993624445
Phone: 5095253720
NPI Identifier 1275507485
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Dr. Bruce E Barga , MD

Internal Medicine

Active NPI Status
380 Chase Ave, Internal Medicine, Walla Walla, WA 993622924
Phone: 5095258110
NPI Identifier 1457375206
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Dr. Allison Bauer , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1120 W Rose St, Walla Walla, WA 993621662
Phone: 5095253720
NPI Identifier 1801392279
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Dr. Lori Alborn Brown , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
380 Chase St, Walla Walla, WA 99362
Phone: 5095258110
NPI Identifier 1083628499
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Dr. Jon B Gardner , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
380 Chase St, Internal Medicine, Walla Walla, WA 99362
Phone: 5095258110
NPI Identifier 1447264841
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Dr. Karen Geheb , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
401 W Poplar St, Walla Walla, WA 993622846
Phone: 5098973320
NPI Identifier 1972532745
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Dr. John Casey Heffernan , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
380 Chase Ave, Walla Walla, WA 993622924
Phone: 5098975836
NPI Identifier 1750818019
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Dr. Philip L Hooper , MD

Internal Medicine

Active NPI Status
55 West Tietan, Walla Walla, WA 99362
Phone: 5095253720
NPI Identifier 1154307742
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Dr. Eric J Jauhiainen , MD

Internal Medicine

Active NPI Status
55 W Tietan St, Walla Walla, WA 993624445
Phone: 5095253720
NPI Identifier 1235103466
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Lynn Kemper

Internal Medicine

Active NPI Status Accepts Medicare Assignment
401 W Poplar St, Walla Walla, WA 993622846
Phone: 5098972980
NPI Identifier 1154703510
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Dr. Benjamin Hardwick Leach , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
401 W Poplar St, Hospitalists, Walla Walla, WA 993622846
Phone: 5095225145
NPI Identifier 1508053174
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Dr. Stevie Mazyck , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
401 W Poplar St, Walla Walla, WA 993622846
Phone: 5098973320
NPI Identifier 1902835697
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Dr. Sri Harika Meka , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
401 W Poplar St, Walla Walla, WA 993622846
Phone: 5098973320
NPI Identifier 1396307211
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Dr. Joseph F Meyer , MD

Internal Medicine

Active NPI Status
401 W Poplar St, Walla Walla, WA 993622846
Phone: 5095253320
NPI Identifier 1972517381
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Dr. Paul E Parker , MD

Internal Medicine

Active NPI Status
380 Chase St, Walla Walla, WA 99362
Phone: 5095258110
NPI Identifier 1538240304
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Dr. Roshan Patel , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
401 W Poplar St, Walla Walla, WA 993622846
Phone: 5098973320
NPI Identifier 1679094239
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Dr. Joanne Lynn Nunez Perez , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
380 Chase Ave, Internal Medicine, Walla Walla, WA 993622924
Phone: 5095258110
NPI Identifier 1467643619
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Frequently Asked Questions about Internal Medicine in Walla Walla

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 Washington 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.