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 88 of 134.
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
- Samuel Nokuri, M.D.Internal Medicine Physician1730360587
- Karina NolascoBehavior Technician1255133070
- Kami NolkeRegistered Nurse1336692425
- Lisa NollBehavior Analyst1740704139
- Judith NoonanPhysical Therapy Assistant1457718579
- Andrea NoriegaBehavior Technician1306574066
- Jennifer NormanAssistant Behavior Analyst1891329173
- Erin NorrisBehavior Technician1235801259
- Jessica Norris, RNRegistered Nurse1811410327
- Kalyn NorrisBehavior Technician1053190322
- Rochelle NorrisRegistered Nurse1447504832
- Elizabeth Northrup, RNRegistered Nurse1790122992
- Jordan Northrup, DPTPhysical Therapist1982437885
- Steven Noskow, M.D.Gynecology Physician1528083698
- Jackie Notes, CNMAdvanced Practice Midwife1235139262
- Sara Novak, LCSW-C, MACAcupuncturist1730371139
- Sharon NowakowskiRegistered Nurse1649681446
- Olivia NowlinBehavior Technician1710753058
- Elizabeth Noyes, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1639562317
- Jeffrey NsubugaBehavior Technician1013886381
- Gerald NtuneInterpreter1720334683
- Melissa Nugent, LGPCProfessional Counselor1003546474
- Sofiya NukaloCertified Registered Nurse Anesthetist1407241763
- Mark Nusbaum, PH.D.Psychologist1154340636
- Alexandra NuttallBehavior Analyst1942883327
- Augustine Nwabueze, MDContractor1174184766
- Vivian Nwagwu, RNRegistered Nurse1407264807
- Obiageli NwakanmaBehavior Technician1629909114
- Lisa NwannaBehavior Technician1942049564
- Chukwudumebi NwasurubaBehavior Technician1508660374
- Obinna NwaudoPharmacist1861083875
- Dyna NwokoRegistered Nurse1760828081
- Paule Bernice NyamsiBehavior Technician1144177155
- David Nyanjom, M.D.Pulmonary Disease Physician1235134370
- Leila NzekeleBehavior Analyst1255206090
- Alexandre NzouakeuPersonal Care Attendant1306554647
- Madison O'BeirneBehavior Technician1487243028
- Richard O'Brien, MDNeurology Physician1316929938
- Kennedy O'ConnorBehavior Technician1306719448
- Meghan O'Connor, M.D.Obstetrics & Gynecology Physician1164711370
- Melissa O'ConnorRegistered Nurse1902292006
- Elris O'Garro-Davis, RNRegistered Nurse1548511009
- Jennum O'Hara, M.AC., L.AC.Acupuncturist1861898983
- Jessica O'Hara-AndersonNutritionist1134087232
- Alexandra O'Hora, LMSWClinical Social Worker1437921533
- Ava O'KeefeBehavior Technician1700470879
- Katharine O'MahonyBehavior Technician1851252126
- Aidan O'Maille, SLPASpeech-Language Assistant1780366435
- Bethany O'MalleyBehavior Technician1033721691
- Michaela O'Malley, RNRegistered Nurse1841780681
The largest Maryland cities
- Baltimore35,183
- Rockville14,353
- Bethesda7,245
- Silver Spring6,531
- Frederick3,981
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.