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 47 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. Mary Green, RN, IBCLCRegistered Nurse1457971277
  2. Maya Green, MSOTR/LOccupational Therapist1306317664
  3. Maya GreenBehavior Technician1023941556
  4. Nhamiyia GreenBehavior Technician1871274886
  5. Maxina Greenberg, DDSGeneral Practice Dentistry1407214117
  6. Brett Greenberger, M.D.Psychiatry Physician1073591558
  7. Emily Greenberger, LCSW-CClinical Social Worker1750655783
  8. Shayna GreenblattSocial Worker1720629256
  9. Briana GreeneBehavior Technician1588328447
  10. Terra Greene, MSN, RNRegistered Nurse1154768356
  11. Sade Greenfield, PHARM.D, RPHPharmacist1447173075
  12. Cyan GreenhillBehavior Technician1083391288
  13. Sharon Greenidge, LCSW-CClinical Social Worker1194116152
  14. Sarah GreeningBehavior Technician1912712357
  15. Lindiwe Greenwood, MDFamily Medicine Physician1932147881
  16. Maria Gregory, PA-CPhysician Assistant1669440210
  17. George Greidinger, M.D.General Practice Physician1548594617
  18. Mark Greiner, L.AC.Acupuncturist1295366839
  19. Jill Grempler, LCSW-CClinical Social Worker1407360365
  20. Gabriella GreshamBehavior Technician1295543494
  21. Judith Greth, PTPhysical Therapist1518193143
  22. Desirae GreyBehavior Technician1700769205
  23. Kaydence GrierBehavior Technician1881543403
  24. Alexandria Griffin, BSN, RNRegistered Nurse1073270401
  25. James Griffin, MDInternal Medicine Physician1649373150
  26. Leah Griffin, PA-CPhysician Assistant1922679752
  27. Patricia GriffinRegistered Nurse1821400524
  28. Shakeya GriffinBehavior Technician1831925197
  29. Twyla GriffinRegistered Nurse1518373885
  30. Daneeka Griffin-BeyHome Health Registered Nurse1952053670
  31. Haley GriffithBehavior Technician1417846882
  32. Jennifer Griffith, RNRegistered Nurse1619456993
  33. Kirk Griffith, PH.D.Clinical Neuropsychologist1609101716
  34. Daniel GriggsRegistered Nurse1780099101
  35. Inna GrigoryevaMassage Therapist1790621472
  36. Lori Grimes, MAC,LAC,MBAAcupuncturist1033494760
  37. Madelyn Grinc, CRNPNurse Practitioner1881933182
  38. Alexandra Grobicki, M.S., LCMFTMarriage & Family Therapist1952573271
  39. Dechei GroceBehavior Technician1134866080
  40. Madison GrociaBehavior Technician1043959976
  41. George Groman, MDSpecialist1255308201
  42. Samantha Gronau, M.A.Behavior Technician1891459194
  43. Barbara GroseNutritionist1336412394
  44. Alison GrossOccupational Therapist1871422535
  45. Kaa'Liyah GrossBehavior Technician1427842426
  46. Lindsay GrossRegistered Nurse1336914621
  47. Melissa GrossDental Hygienist1558136937
  48. Paula Grossman, RNRegistered Nurse1114412871
  49. Kathryn GrossmeyerRegistered Nurse1578966354
  50. Lev Grotel, LCSW-CClinical Social Worker1750787602

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.