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 75 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
- Maguid Mansour, M.D.Psychiatry Physician1558336040
- Dyonne Mansur, ARNPGerontology Nurse Practitioner1316498645
- Leyla MansurClinical Psychologist1255004859
- Emily ManuelBehavior Technician1578374708
- Camille ManunciaBehavior Technician1790429199
- Amy Maranto, MS, LGPCMental Health Counselor1720696214
- Joseph Maravi, LCSWCClinical Social Worker1679514699
- Nadege Marc, NPGerontology Nurse Practitioner1134841406
- Madeline March, M.A. BCBA-LBA (MD)Behavior Analyst1215722160
- Shari Marchese-Kennedy, MPTPediatric Physical Therapist1457481632
- Mary Marcin, MDPediatrics Physician1689920381
- Shelah Marcin, R.N.Registered Nurse1023435880
- Robert Marcus, PHDClinical Psychologist1568519189
- Johanna Marenco, RN, BSNRegistered Nurse1346738788
- Stephanie MargoBehavior Technician1821799149
- Cindy MarhefkaPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1902517360
- Jose MariaBehavior Technician1366194029
- Ilsia MarinBehavior Technician1356138390
- Heidi MarineClinical Social Worker1538632377
- Ashley Marinelli, LCPCProfessional Counselor1578141479
- Debbie Marini, LCSWCClinical Social Worker1437521515
- Amanda Marino, DPTPhysical Therapist1760775332
- Angla MarinoBehavior Technician1255290854
- Catherine MarinoRegistered Nurse1710318647
- Donna Marino, RNRegistered Nurse1649781790
- Luisa Marino, LCPAT, ATR-BCMental Health Counselor1114678802
- Gesireth MariscalClinical Social Worker1619539343
- Michelle MarkeySocial Worker1780426924
- Jenna MarklandBehavior Technician1871225839
- Giuliana MarkovichFamily Nurse Practitioner1356194385
- Samantha Marks, PSY.D.Psychologist1508292848
- William Marks, M.D.Family Medicine Physician1164579090
- Kari Marlowe, RNRegistered Nurse1326580895
- Latoya MarlynBehavior Technician1578442562
- Theresa Marolda, M.AC., L.AC.Acupuncturist1801553425
- Travis Marquess, M.P.T.Physical Therapist1891847661
- Dayana Marquez VillanuevaBehavior Technician1467124354
- Bernard Marquis, M.D.Anesthesiology Physician1114993045
- Dayli Marrero, PHDClinical Psychologist1811932338
- Debra Marsch, RNRegistered Nurse1619215464
- Richard Marsella, M.D.,PH.D.Anatomic Pathology & Clinical Pathology Physician1174656193
- James Marsh, LCPCProfessional Counselor1992005706
- Daniel Marshall, PHD, JDPsychologist1467997254
- Jane MarshallBehavior Technician1932099546
- Kimberly Marshall, LCSW-CSocial Worker1306227541
- Madelyn Marshall, LGPCMental Health Counselor1841007499
- Tuzette Marshall, RNRegistered Nurse1750825675
- Victoria Marshall, LCPCMental Health Counselor1184151813
- Kassandra MarteBehavior Technician1427681543
- Adriannah MartinBehavior Technician1598629552
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.