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 101 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. Alex Rennich, LCPCProfessional Counselor1275378572
  2. Rachel Rentch, LCSW-CSocial Worker1114198918
  3. Rebecca RenziRegistered Nurse1558767525
  4. Jessica Resch, M.AC., L.AC.Acupuncturist1184926057
  5. Amy Respondek, DDSOral and Maxillofacial Surgery (Dentist)1487800918
  6. Lauren Restaino, CRNPPediatric Nurse Practitioner1265885206
  7. Cristina Restrepo-HarnerBehavior Analyst1669912481
  8. Samantha ReyesMassage Therapist1861262123
  9. Jeanine Paulette Reyes-Bautista, M.D.Pediatrics Physician1316300700
  10. Camila Reyes-LoayzaBehavior Technician1194668780
  11. Aahna ReynoldsBehavior Technician1578202107
  12. Kristen Reynolds, RNRegistered Nurse1811405657
  13. Larissa Reynolds, PH.D., BCBA-DClinical Psychologist1699015354
  14. Melanie Reynolds, CRNPNurse Practitioner1396053906
  15. Stephanie Reynolds, LCSW-CMental Health Counselor1447300751
  16. Neda Rezaeian, PHARM DPharmacist1326636747
  17. Anna Reznikova, PA-CPhysician Assistant1639474927
  18. John Rhead, PH.D.Psychologist1811039068
  19. Helena Rhee, RNRegistered Nurse1194148676
  20. Janice Rhee, PHARM.D.Pharmacist1952509903
  21. Emily RhodesBehavior Analyst1356685697
  22. Jason Rhodes, LCSW-CClinical Social Worker1699064352
  23. Stephanie Rhodes, CNMAdvanced Practice Midwife1629012786
  24. Maria Ribaya-Than, M.D.Anesthesiology Physician1508833369
  25. Veronica Ribeiro PollockBehavior Technician1043953508
  26. Constance RiceDental Hygienist1770341935
  27. Jennifer Rice, RN, BSNRegistered Nurse1033885033
  28. Rosemary RichRegistered Nurse1801226840
  29. Diane RichardRegistered Nurse1184131963
  30. Deion RichardsBehavior Technician1659174746
  31. Kayla RichardsCertified Registered Nurse Anesthetist1043845100
  32. Stephanie Richards, M.D.Anatomic Pathology & Clinical Pathology Physician1477948024
  33. Leonard Richardson, MDInternal Medicine Physician1053384750
  34. Michael Richardson, CNA/GNAHome Health Aide1265245518
  35. Naomi RichardsonBehavior Technician1366167405
  36. Shanita RichardsonBehavior Technician1194459438
  37. Vivian Richburg, CRNACertified Registered Nurse Anesthetist1881763746
  38. Suzanne Ricklin, LCSW-C, BCD, CEDSClinical Social Worker1922293414
  39. Candance Riddick, M.ED, RN CDDoula1609751213
  40. Michelle RiddickRegistered Nurse1225570799
  41. Mark Riddle, M.D.Child & Adolescent Psychiatry Physician1316989304
  42. Joshua Ridenour, LCSW-CClinical Social Worker1396548848
  43. Andrea Ridgeway, D.O.Emergency Medicine Physician1235373168
  44. Asia RidleyBehavior Technician1396694857
  45. Matthew RigginsPhysical Therapist1326853771
  46. Amanda RileyBehavior Analyst1023558913
  47. Ja'Meka RileyBehavior Analyst1962918789
  48. Susan Riley, NPNurse Practitioner1285100297
  49. Kasey Rimpf, RNRegistered Nurse1275041022
  50. Stephanie RindfleischBehavior Technician1356079693

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.