NPPES file of Aug 9, 2026

Doctors and health care providers in Frederick, MD

3,981 individual NPPES records list a practice address in Frederick, 6th of 284 Maryland cities. The largest group is behavior technician: 427, 11% of the city's records, against 16% across Maryland. Page 80 of 80.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in Frederick

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Frederick in Maryland

  • Rank in Maryland6th of 284 cities by records
  • Share of the state2.5% of Maryland's records
  • Specialties present25 or more taxonomy codes
  • Top three groups25.7% of all records

Compared with Maryland as a whole, Frederick has 2.3× the state's share of massage therapist records and 0.60× its share of internal medicine physician records.

Providers in Frederick, alphabetically

  1. Jessica ZambrenyCounselor1740099050
  2. Myla Zamora, P.T.Physical Therapist1487993077
  3. John Zapas, M.D.Surgery Physician1487613022
  4. Taylor ZaranskiPhysical Therapist1841014123
  5. Kiarash Zarbalian, MDEndocrinology, Diabetes & Metabolism Physician1467587063
  6. Arash Zarrin, DOGastroenterology Physician1407351729
  7. Lauren Zaryk, DPTPhysical Therapist1407259666
  8. Melissa Zatz, LCSW-CClinical Social Worker1790927986
  9. Deborah Zayas, APRN, FNPFamily Nurse Practitioner1982891073
  10. James Zazanis, LCSW-CClinical Social Worker1659048833
  11. Monica Zeballos, PHARM.D.Pharmacist1700174018
  12. Lisa Zecher, LCSW-CClinical Social Worker1255495305
  13. Christina Zeilberger, M.D.Pediatrics Physician1922397306
  14. Cynthia Zeller, CRNPNurse Practitioner1093744831
  15. Gabrielle Zeller, OTOccupational Therapist1417883463
  16. Amanda Zellner, RNRegistered Nurse1205659604
  17. Deborah ZemedeRegistered Dietitian1821949231
  18. Kimberly Zeren, CRNP- FAMILYFamily Nurse Practitioner1003813072
  19. Patricia Zetkulic, LCPCCounselor1548968589
  20. Dulat Zhandossov, DPTPhysical Therapist1477851434
  21. Mahsa ZiashakeriOrthodontics and Dentofacial Orthopedics Dentistry1225804404
  22. Louisa Ziglar, MDRheumatology Physician1538336151
  23. Katumu ZinnahClinical Social Worker1558072298
  24. Rachel Zirlin, MS, CCC-SLPSpeech-Language Pathologist1184083529
  25. Kimberly Zisman, RDN,LDNRegistered Dietitian1417768763
  26. Olivia Zucco, M.A., B.C.B.A.Behavior Analyst1366717332
  27. Salam Zughayer, DONeurology Physician1205950045
  28. Cassandra Zurbuch, PT, DPTPhysical Therapist1437172632
  29. Keith Zurbuch, PTPhysical Therapist1437321825
  30. Garrit Zwakenberg, PTAPhysical Therapy Assistant1447624788
  31. Jack ZygmuntPhysical Therapist1053334656

The largest Maryland cities

  1. Baltimore35,183
  2. Rockville14,353
  3. Bethesda7,245
  4. Columbia6,690
  5. Silver Spring6,531

All of Maryland →

How to read this directory

Frederick, Maryland appears in the CMS National Plan and Provider Enumeration System with 3,981 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Frederick - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Frederick practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Frederick is weighted toward Behavior Technician (427 clinicians, followed by Clinical Social Worker with 348 and Physical Therapist with 249). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to Maryland's population, Frederick reports roughly 64.4 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

Of Maryland's most common specialties, Home Health Aide is the most prominent one with no provider currently listing a Frederick practice address, a coverage gap Frederick patients typically fill by traveling to a larger nearby hub.

For Frederick patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.

For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.

Common questions

How many doctors are in Frederick, MD?

There are 3,981 registered healthcare providers in Frederick, MD, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Frederick?

The most common specialties in Frederick are Behavior Technician, Clinical Social Worker, Physical Therapist, Professional Counselor, Mental Health Counselor. Behavior Technician has the most providers with 427.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.