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Healthcare Providers & Facilities in Frederick, MD

Public healthcare directory of 4,001 individual practitioners and 1,628 healthcare facilities located in Frederick, Maryland.

4,001 Practitioners
1,628 Facilities
229 Specialties

Medical Specialties in Frederick

Select a specialty to view practitioner listings, practice locations, and qualifications.

Ask about interpreters and office accessibility

All Specialties in Frederick

Specialties with enough public records for a comparison with U.S. figures, besides those named above, plus the 60 largest of 191 more with at least one listed practitioner. Number of practitioners in brackets.

Chiropractic Providers

Dietary & Nutritional Service Providers

Eye and Vision Services Providers

Nursing Service Related Providers

Podiatric Medicine & Surgery Service Providers

Speech, Language and Hearing Service Providers

Featured Healthcare Providers in Frederick

Practitioner profiles in Frederick, MD with recent CMS Medicare or Open Payments data.

Theresa Wilhelm , NP

Nurse Practitioner

347 Ballenger Center Dr, Frederick, MD
Phone: 3016635181
NPI 1184061053

Dr. Shien Hu , MD

Internal Medicine - Gastroenterology

Medicare Accepted
7109 Guilford Dr Ste 300, Frederick, MD
Phone: 3016956800
NPI 1366766966

Sherene Broome , CNM

Midwife

Medicare Accepted
77 Thomas Johnson Dr Ste J, Frederick, MD
Phone: 3014142300
NPI 1598262834

Dr. Syed Haque , MD

Internal Medicine

700 Montclaire Avenue, Frederick, MD
Phone: 3016625252
NPI 1952390205

Emily So

Physician Assistant

Medicare Accepted
63 Thomas Johnson Dr Ste B, Frederick, MD
Phone: 3016982424
NPI 1184488967

Dr. Mark Lemonnier , DDS

Dentist - General Practice

6550 Mercantile Dr E, Frederick, MD
Phone: 3016630811
NPI 1780627778

Largest Cities in Maryland

Other Maryland cities with a full directory, by the number of active practitioners listed in NPPES.

How Frederick compares with the U.S.

Compared with the U.S. as a whole, Frederick has more clinicians in Podiatrist - Foot & Ankle Surgery (6.8x), clinicians in Counselor - Professional (5.6x) and clinicians in Nurse Practitioner - Psychiatric/Mental Health (5.1x) per 100,000 residents.

It has fewer clinicians in Nurse Anesthetist, Certified Registered (58% of the U.S. rate) per 100,000 residents.

Frederick has 4,798 active clinicians per 100,000 residents, compared with 2,198 for the U.S.

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.

93% of clinicians in Frederick listed in the CMS Medicare file (935 of 1,006) accept Medicare assignment. That is higher than the Maryland share of 84%.

Only 1,006 of 4,001 active clinicians in Frederick 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.

32% of clinicians in Frederick listed in the CMS Medicare file (319 of 1,006) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is similar to the Maryland share of 27%.

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).

Frederick CMS Healthcare & Financial Disclosures

CMS Part D Prescribers (2024), Open Payments (program year 2025), Medicare (PECOS) enrollment and Part B (2024) data for Frederick, MD

Source: CMS public datasets

Healthcare operations in Frederick, MD encompass 4,001 active individual practitioners and 1,628 registered medical facilities across 229 clinical specialties.

According to CMS Medicare Part D analytics for 2024, prescription drug volume in Frederick accounts for $110.4 Million across 694,680 prescription claims. 1,494 local practitioners have a Medicare (PECOS) enrollment record. Open Payments data for program year 2025 list $1.0 Million in payments reported by companies to 641 local practitioners; a reported payment does not necessarily mean the financial relationship is improper.

Medicare Part D Prescriptions (2024) $110.4M 694,680 Prescription Claims Source: data.cms.gov
Open Payments Sunshine Act (2025) $1.0M 641 Recipients Disclosed A reported payment does not necessarily mean the financial relationship is improper. Source: openpaymentsdata.cms.gov
Medicare (PECOS) Enrollment 1,494 Enrolled Medicare Practitioners Source: data.cms.gov
Medicare Part B Allowed Volume (2024) $130.1M 4,938,643 Services Performed Source: data.cms.gov

CMS PECOS: Eligible to Order or Refer for Medicare in Frederick

Part B Lab & Imaging Eligible: 1,055
Durable Medical Equipment (DME): 1,112
Home Health Agency (HHA): 862
Source: CMS Order and Referring