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 130 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. Matthew Williams, MDHematology & Oncology Physician1063040681
  2. Megan Williams, PHDClinical Psychologist1174256275
  3. Melodie WilliamsRegistered Nurse1174193171
  4. Michelle Williams, CRNP-PMHPsychiatric/Mental Health Nurse Practitioner1912151531
  5. Nava Williams, LMSWSocial Worker1144001967
  6. Nia Williams, RN, MSN, MPH, IBCLCLactation Consultant (Registered Nurse)1740795988
  7. Oyinkansola Williams, NPPsychiatric/Mental Health Nurse Practitioner1821803578
  8. Patricia Williams, EDD, RBTBehavior Technician1093605859
  9. Quinten WilliamsBehavior Technician1285405910
  10. Shelby Williams, RBTBehavior Technician1265066609
  11. Staci WilliamsBehavior Technician1841002698
  12. Stephanie Williams, DPTPhysical Therapist1245847912
  13. Sydney Williams, DPTPhysical Therapist1164168183
  14. Tiffany WilliamsBehavior Technician1720795909
  15. Tiffanye Williams, WHNPWomen's Health Nurse Practitioner1376167478
  16. Tondaleyo WilliamsRegistered Nurse1770998106
  17. Unique WilliamsBehavior Technician1982417986
  18. Yolande Williams, M.A., CCC-SLPSpeech-Language Pathologist1376324111
  19. Zion WilliamsBehavior Technician1649064437
  20. Shaneka Williams-Waddell, RBTBehavior Analyst1851132377
  21. Felicia Williamson, CCC-SLPSpeech-Language Pathologist1447568407
  22. Joyce WilliamsonRegistered Nurse1922401702
  23. Julie Williford, MOT OTR/LHand Occupational Therapist1083015051
  24. Sophie Willihnganz, DPTPhysical Therapist1467386243
  25. Anu Olayinka Willingham-McLain, PA-CPhysician Assistant1295287753
  26. Jamia WillisBehavior Technician1437802378
  27. Karen Willis, RNRegistered Nurse1093171209
  28. Lajuana Willis, R.N.Ambulatory Women's Health Care Registered Nurse1457744336
  29. Kathleen WillmoreBehavior Technician1861050536
  30. Jawann Wills, LCSW-CClinical Social Worker1730745951
  31. Kathleen WillsRegistered Nurse1245618156
  32. Sophia Wilmot, FNP-CNurse Practitioner1225402969
  33. Caroline Wilner, LCSWCMental Health Counselor1073509295
  34. Alison Wilson, PTPhysical Therapist1962518001
  35. Cheri WilsonBehavior Technician1871309203
  36. Christina WilsonRegistered Nurse1346633856
  37. Delicia WilsonBehavior Technician1407779028
  38. Erica WilsonBehavior Technician1669159729
  39. Ilene Wilson, RNRegistered Nurse1619371523
  40. Jeremy Wilson, MS BCBA LBABehavior Analyst1235927872
  41. Shalexis WilsonBehavior Technician1689281974
  42. Kimberly Wiman, PT, DPTPhysical Therapist1346732047
  43. Celia Winchell, M.D.Psychiatry Physician1265794093
  44. Rishanda Winchester, LGPCProfessional Counselor1235821414
  45. Janae Winder, LCPCProfessional Counselor1104307438
  46. Gabriel Windsor-Reedy, RBTBehavior Technician1194511121
  47. Rashida Winestock, RNRegistered Nurse1205335262
  48. Karen Winfield, RNRegistered Nurse1124469010
  49. Ta'Niyah WingateBehavior Technician1700735206
  50. Holly WinklbauerBehavior Technician1528648425

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.