NPPES file of Aug 9, 2026

Doctors and health care providers in Columbia, MD

6,690 individual NPPES records list a practice address in Columbia, 4th of 284 Maryland cities. The largest group is behavior technician: 2,034, 30% of the city's records, against 16% across Maryland. Page 32 of 134.

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

The 8 largest groups in Columbia

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

Columbia in Maryland

  • Rank in Maryland4th of 284 cities by records
  • Share of the state4.2% of Maryland's records
  • Specialties present25 or more taxonomy codes
  • Top three groups47.3% of all records
  • Behavior Technician rank3rd of the 10 Maryland cities with the most

Compared with Maryland as a whole, Columbia has 7.6× the state's share of registered nurse records and 0.47× its share of occupational therapist records.

Providers in Columbia, alphabetically

  1. Heather Dickerson, RN, BSN, CCMRegistered Nurse1861982399
  2. Tayla DickersonBehavior Technician1295699577
  3. Lisa Dickerson-Guerra, LCSW-CClinical Social Worker1093271942
  4. Martina DicksRegistered Nurse1801255195
  5. Dorcas DicksonMental Health Counselor1891621926
  6. Michael DicksonPsychiatric/Mental Health Nurse Practitioner1699467019
  7. Rachel DicomoMental Health Counselor1811650963
  8. Terra DiehlBehavior Technician1518497221
  9. Gabrielle Diener, LGPC, NCCMental Health Counselor1235785767
  10. Steven Diener, M.D.Internal Medicine Physician1558362111
  11. Long Diep, PHARM DPharmacist1205406675
  12. Katie Dietrich-Burns, M.S.Speech-Language Pathologist1417188186
  13. Gabrielle Dietz, LCSWCSocial Worker1164060794
  14. Terri Difazio, MDNeonatal-Perinatal Medicine Physician1184635997
  15. Jazmine Diggs, LGMFTMarriage & Family Therapist1780415125
  16. Naweh DiggsSocial Worker1992418057
  17. Necole DiggsClinical Social Worker1205870847
  18. Kelsey Dillon, DOULADoula1770383309
  19. Kristal Dillon, R.N.Registered Nurse1720383482
  20. Stephen DillonBehavior Technician1023734456
  21. Helen Ding, LMSWClinical Social Worker1023636404
  22. Capucine DingleRegistered Nurse1356819551
  23. Tyana DingleBehavior Technician1154072965
  24. Bethany Dipaula, PHARM.D.Psychiatric Pharmacist1902934201
  25. Yvonne Dipeso, RNRegistered Nurse1518335314
  26. Catherine Disanti, AU.D.Audiologist1487668984
  27. Katherine Discavage, OTR/LOccupational Therapist1063786960
  28. Anthony DisilvestroBehavior Technician1972261154
  29. Elizabeth Disney, PH.D.Psychologist1770505331
  30. Adinarayana Divakaruni, M.D.Gastroenterology Physician1699774570
  31. David Diwa, PHARM.D.Pharmacotherapy Pharmacist1679791925
  32. Juliette Dixon, LCSWClinical Social Worker1932793965
  33. Maren Dixon, PT, DPTPhysical Therapist1518411883
  34. Marie Dixon, OTLOccupational Therapist1124461900
  35. Niya DixonBehavior Technician1962229690
  36. Rickayla DixonDoula1851214449
  37. Lily DoBehavior Technician1750051678
  38. Jabari DobsonBehavior Technician1891449229
  39. Willie Doctor, LCSW-CClinical Social Worker1972989895
  40. Niki Dodek, DDSGeneral Practice Dentistry1437276417
  41. Samuel Dodek, DDSGeneral Practice Dentistry1710004700
  42. Makayla DodsonBehavior Technician1508528209
  43. Abigail Doff, LMSWSocial Worker1790662625
  44. Lindsay Dokou, M.D.Obstetrics & Gynecology Physician1417290446
  45. Elizabeth Dolan, LCPCCounselor1659874139
  46. Shelley Dolitsky, MDObstetrics & Gynecology Physician1851880652
  47. Madeline Doll, LMSWSocial Worker1063295269
  48. Rita Dombroski, LCPCCounselor1326368804
  49. Evelin Domenech, MDBehavior Technician1871319558
  50. Cindy Dominique, LCPCProfessional Counselor1245767227

The largest Maryland cities

  1. Baltimore35,183
  2. Rockville14,353
  3. Bethesda7,245
  4. Silver Spring6,531
  5. Frederick3,981

All of Maryland →

How to read this directory

Columbia, Maryland appears in the CMS National Plan and Provider Enumeration System with 6,690 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 Columbia - 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 Columbia 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 Columbia is weighted toward Behavior Technician (2,034 clinicians, followed by Registered Nurse with 783 and Clinical Social Worker with 346). 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, Columbia reports roughly 108.2 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 Columbia practice address, a coverage gap Columbia patients typically fill by traveling to a larger nearby hub.

For Columbia 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 Columbia, MD?

There are 6,690 registered healthcare providers in Columbia, MD, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Columbia?

The most common specialties in Columbia are Behavior Technician, Registered Nurse, Clinical Social Worker, Behavior Analyst, Physical Therapist. Behavior Technician has the most providers with 2,034.

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.