Independent US Healthcare Provider Directory & Public Medical Database Patient Guides
Medical Specialty Listing

Internal Medicine Providers in Oak Ridge, TN

Browse 22 Internal Medicine providers listed in NPPES with a practice address in Oak Ridge, Tennessee.

22 Healthcare Providers

How Oak Ridge compares with the U.S.

Oak Ridge has 67 clinicians in Internal Medicine per 100,000 residents, about 1.5 times the U.S. rate of 44.

That is 22 active clinicians in Internal Medicine with a practice address in Oak Ridge, for a population of 32,693.

The Tennessee rate is 37 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 Oak Ridge listed in the CMS Medicare file (16 of 16) accept Medicare assignment. That is similar to the Tennessee share of 97%.

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.

13% of clinicians in Internal Medicine in Oak Ridge listed in the CMS Medicare file (2 of 16) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the Tennessee share of 23%.

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 Oak Ridge, TN

Source: CMS PECOS
PECOS Enrolled Specialists 17 In Oak Ridge, TN
Part B Lab & Imaging Eligible 17 Diagnostic Referrals
DME Ordering Eligible 17 Durable Medical Equipment
Home Health Agency Referrals 17 HHA Ordering Eligible
Showing 1โ€“20 of 22 providers
With recent CMS data first, then Aโ€“Z

Dr. Nawras K. Baban , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8654811000
NPI Identifier 1225075021
View Full Profile

Dr. Helen Susan Bidawid , MD

Internal Medicine

Active NPI Status
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8654811000
NPI Identifier 1114968856
View Full Profile

Dr. Arnold D. Bridges , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, Oak Ridge, TN 378306976
Phone: 8654811000
NPI Identifier 1831131887
View Full Profile

Dr. Daniel Rudolph Duzan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8654881100
NPI Identifier 1518900091
View Full Profile

Dr. Jefferson Pierce Gillum , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8658354304
NPI Identifier 1891290656
View Full Profile

Dr. Wesley L Hayes , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
801 Oak Ridge Tpke, Oak Ridge, TN 378306916
Phone: 8654833172
NPI Identifier 1780603084
View Full Profile

Dr. Michael A Henderson , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
801 Oak Ridge Tpke, Oak Ridge, TN 378306916
Phone: 8654833172
NPI Identifier 1639125495
View Full Profile

Dr. Ellen F Liuzza , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
100 Vermont Ave, Oak Ridge, TN 378306471
Phone: 8654821777
NPI Identifier 1437158920
View Full Profile

Dr. Hiteshwar Singh Mangat , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8658351000
NPI Identifier 1497374276
View Full Profile

Aathi Lakshmi Mariappan

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8658351000
NPI Identifier 1023635224
View Full Profile

Dr. Allee Chaslyn Maxwell , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8658351000
NPI Identifier 1811638273
View Full Profile

Dr. Niva Misra Sammons , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
801 Oak Ridge Tpke, Oak Ridge, TN 378306916
Phone: 8654833172
NPI Identifier 1679910137
View Full Profile

Dr. Julia A Monahan , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8658351000
NPI Identifier 1487814414
View Full Profile

Dr. Erik Christian Petersen , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, TN 37830
Phone: 8654811000
NPI Identifier 1699716910
View Full Profile

Dr. Owaisur Rahman , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8658354304
NPI Identifier 1992016364
View Full Profile

Dr. Kimberly Ann Russell , MD

Internal Medicine

Active NPI Status
300 Laboratory Rd, Oak Ridge, TN 37830
Phone: 8654827698
NPI Identifier 1194753293
View Full Profile

Dr. Aaron Joshua Smyth , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
801 Oak Ridge Tpke, Oak Ridge, TN 378306916
Phone: 8654833172
NPI Identifier 1053575357
View Full Profile

Dr. Heather Stooksbury , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8658351000
NPI Identifier 1518346402
View Full Profile

Dr. Srini P. Eranki , MD

Internal Medicine

Active NPI Status
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8654811000
NPI Identifier 1205873007
View Full Profile

Dr. Christopher M. Frost , MD

Internal Medicine

Active NPI Status
990 Oak Ridge Tpke, Oak Ridge, TN 378306976
Phone: 8654811000
NPI Identifier 1881635928
View Full Profile

Frequently Asked Questions about Internal Medicine in Oak Ridge

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 Tennessee 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.