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

Internal Medicine Providers in Frederick, MD

Browse 59 Internal Medicine providers listed in NPPES with a practice address in Frederick, Maryland.

59 Healthcare Providers

How Frederick compares with the U.S.

Frederick has 71 clinicians in Internal Medicine per 100,000 residents, about 1.6 times the U.S. rate of 44.

That is 59 active clinicians in Internal Medicine with a practice address in Frederick, for a population of 83,395.

The Maryland rate is 63 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.

97% of clinicians in Internal Medicine in Frederick listed in the CMS Medicare file (31 of 32) accept Medicare assignment. That is higher than the Maryland share of 86%.

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.

63% of clinicians in Internal Medicine in Frederick listed in the CMS Medicare file (20 of 32) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the Maryland share of 41%.

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 Frederick, MD

Source: CMS PECOS
PECOS Enrolled Specialists 41 In Frederick, MD
Part B Lab & Imaging Eligible 42 Diagnostic Referrals
DME Ordering Eligible 42 Durable Medical Equipment
Home Health Agency Referrals 42 HHA Ordering Eligible
Showing 1โ€“20 of 59 providers
With recent CMS data first, then Aโ€“Z

Dr. Ghulam Abbas , MD

Internal Medicine

Active NPI Status
801 Toll House Ave, Frederick, MD 217014564
Phone: 3017878030
NPI Identifier 1477658045
View Full Profile

Dr. Atrish Akhtar , MD

Internal Medicine

Active NPI Status
1562 Opossumtown Pike, Frederick, MD 217024337
Phone: 3016628119
NPI Identifier 1386082881
View Full Profile

Dr. Sajjad Ahmad Aziz , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
801 Toll House Ave, Suite C-3, Frederick, MD 217014564
Phone: 3016631566
NPI Identifier 1457336554
View Full Profile

Dr. Susan Barnett Brinkley , MD

Internal Medicine

Active NPI Status
198 Thomas Johnson Dr, Suite 200, Frederick, MD 217024398
Phone: 3016682800
NPI Identifier 1184648198
View Full Profile

Dr. Julian Pappy Choe , MD

Internal Medicine

Active NPI Status
2090 Old Farm Dr. Suite 2-D, Frederick, MD 21702
Phone: 3012282295
NPI Identifier 1528001203
View Full Profile

Dr. Kristin A Conley , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
7211 Bank Ct, Frederick, MD 217038483
Phone: 2405667830
NPI Identifier 1023189958
View Full Profile

Dr. Andrew Oliver Donelson , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
65 Thomas Johnson Dr, Suite C, Frederick, MD 217024371
Phone: 3016633836
NPI Identifier 1518996495
View Full Profile

Dr. Matthew Phillip Feldman , MD MS

Internal Medicine

Active NPI Status Accepts Medicare Assignment
400 W Seventh St, Frederick Memorial Hospital, Frederick, MD 217014506
Phone: 2405664722
NPI Identifier 1699942219
View Full Profile

Dr. Michael F Flessner , MD

Internal Medicine

Active NPI Status
100 S Market St, Frederick Community Action Agency, Frederick, MD 217015527
Phone: 3016001506
NPI Identifier 1669401857
View Full Profile

Dr. Syed W. Haque , MD

Internal Medicine

Active NPI Status
700 Montclaire Avenue, Frederick, MD 217014509
Phone: 3016625252
NPI Identifier 1952390205
View Full Profile

Dr. Safrina Hasan , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
400 W Seventh St, Frederick, MD 217014506
Phone: 8432373378
NPI Identifier 1679524540
View Full Profile

Dr. Christine Helinski , MD

Internal Medicine

Active NPI Status
850 Oak St, Frederick, MD 217038442
Phone: 3016988374
NPI Identifier 1821096918
View Full Profile

Dr. Phuong Dinh Ho , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
7115 Guilford Dr, Ste 202, Frederick, MD 217045199
Phone: 3016635922
NPI Identifier 1811179443
View Full Profile

Dr. Elena V Iarikova , MD

Internal Medicine

Active NPI Status
400 W Seventh St, Frederick, MD 217014506
Phone: 8432373378
NPI Identifier 1124226386
View Full Profile

Dr. Robert Lewis Kaufmann , MD

Internal Medicine

Active NPI Status
1562 Opossumtown Pike, Frederick, MD 217024337
Phone: 3016628119
NPI Identifier 1205817384
View Full Profile

Dr. Harminder Kaur , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
186 Thomas Johnson Dr, 105, Frederick, MD 21702
Phone: 3015153333
NPI Identifier 1083702799
View Full Profile

Dr. Sibte Abbas Kazmi , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
814 Toll House Ave, Frederick, MD 21701
Phone: 3016628310
NPI Identifier 1861451361
View Full Profile

Dr. Eleanor Delaney Lannutti , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
63 Thomas Johnson Dr, Frederick, MD 217024384
Phone: 3016947600
NPI Identifier 1487818977
View Full Profile

Dr. Sarah S Lantzy , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
45 Thomas Johnson Dr, Frederick, MD 217024425
Phone: 3016961000
NPI Identifier 1427260579
View Full Profile

Dr. Scarlet Frantz Louis-Jean , MD, MBA

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1562 Opossumtown Pike, Frederick, MD 217024920
Phone: 2402156310
NPI Identifier 1477131076
View Full Profile

Frequently Asked Questions about Internal Medicine in Frederick

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 Maryland 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.