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 18 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. Summer De La Cruz, LICSWClinical Social Worker1447709936
  2. Constance De La Vega, OTOccupational Therapist1366745507
  3. Lemuel Carlo De Leon, CRNPFamily Nurse Practitioner1619446622
  4. Laura De Lima Souza BonaseraBehavior Analyst1932897451
  5. Tess De Smedt, LMSWSocial Worker1780362459
  6. Nuria De SouzaBehavior Technician1538092184
  7. Nicolas DearcangelisBehavior Technician1831826700
  8. Kourtney Deboer, LMFTMarriage & Family Therapist1992113781
  9. Miguel DecastroSocial Worker1467240069
  10. Vivian Dechosa, M.D.Family Medicine Physician1689604654
  11. Helen Decker, RBTBehavior Technician1144996968
  12. Kristin Deely, CRNPAcute Care Nurse Practitioner1063917938
  13. Laura DefeoHealth Educator1255091724
  14. Ryan Defibaugh, LCPC, NCCProfessional Counselor1639665995
  15. Emma Lee Defreitas, RNCase Management Registered Nurse1619844313
  16. Roy DegrangeCertified Registered Nurse Anesthetist1053942284
  17. Safrianna Degroat, LCPCProfessional Counselor1093364499
  18. Richard Deise, LGPCPastoral Counselor1669983607
  19. Justine Del Nunzio, LMSWSocial Worker1588243810
  20. Abigail DelauterBehavior Technician1376105668
  21. Daniel Delauter, CRNPFamily Nurse Practitioner1801315288
  22. Heather DelauterFamily Nurse Practitioner1932979978
  23. Sophia DelauterBehavior Technician1780287029
  24. Brittany DelawderBehavior Technician1295254217
  25. Gerard Delgrippo, M.D.Family Medicine Physician1447233234
  26. Gabriella Delpo, LMSWSocial Worker1801652060
  27. Gregory Demaille, D.C.Chiropractor1902835382
  28. Donna Demattia, P.T.Physical Therapist1770824708
  29. Ashleigh Demoll Carpenter, D.O.Emergency Medicine Physician1598184806
  30. Heather Demory, PA-CPhysician Assistant1508911850
  31. Barbara Denn, OTR/LOccupational Therapist1134690415
  32. William Derbyshire, LCSW-CClinical Social Worker1720082480
  33. Adelle Deriquito, LCPCProfessional Counselor1235774720
  34. Constance DerosaAdult Health Nurse Practitioner1508428103
  35. Leah Derr, LGSWSocial Worker1043727258
  36. Abhishek DesaiOccupational Therapist1538627625
  37. Anish Desai, M.D.Pulmonary Disease Physician1447465232
  38. Jeffery Deschamps, DCChiropractor1821008897
  39. Derek Deshaies, MDSurgery Physician1174084115
  40. Nicole Deshaies, MDSurgery Physician1457813495
  41. Narayan Deshmukh, MDSurgery Physician1124093307
  42. Joshua DeslauriersBehavior Technician1235091315
  43. Leena Dev, MDPediatrics Physician1093725616
  44. Elizabeth Devilbiss, LCPCProfessional Counselor1558514455
  45. Jo Devivo, PA-CPhysician Assistant1992581532
  46. Frances Devlin, RNAdministrator Registered Nurse1518024736
  47. Cassandra Devries, D.C.Chiropractor1477979227
  48. Devan DeweesClinical Social Worker1790185007
  49. Megan Dewing, MT-BCMusic Therapist1710387311
  50. Tanya Dewitt, MDObstetrics & Gynecology Physician1881753689

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.