NPPES file of Aug 9, 2026

Doctors and health care providers in Houston, TX

61,221 individual NPPES records list a practice address in Houston, 1st of 694 Texas cities. The largest group is students in training: 3,913, 6% of the city's records, against 4% across Texas. Page 406 of 1,225.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

The 8 largest groups in Houston

  1. Students in training3,913
  2. Family Nurse Practitioner2,588
  3. Pharmacist2,337
  4. Behavior Technician2,260
  5. Professional Counselor2,158
  6. Physician Assistant1,801
  7. Clinical Social Worker1,660
  8. Speech-Language Pathologist1,497

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Houston in Texas

  • Rank in Texas1st of 694 cities by records
  • Share of the state14.2% of Texas's records
  • Specialties present25 or more taxonomy codes
  • Top three groups14.4% of all records
  • Students in training rank2nd of the 10 Texas cities with the most

Compared with Texas as a whole, Houston has 1.9× the state's share of diagnostic radiology physician records and 0.61× its share of physical therapist records.

Providers in Houston, alphabetically

  1. Joanne Greene, CPNPPediatric Nurse Practitioner1114085180
  2. Jocelyn GreeneSpeech-Language Pathologist1871383679
  3. Karnisha GreeneSocial Worker1568340776
  4. Kascia GreeneBehavior Technician1588464317
  5. Keishlea Greene, B. S. SLP-ASSISTANTSpeech-Language Assistant1548761588
  6. Michael Greene, MDEmergency Medicine Physician1932057072
  7. Ra'Quan GreeneBehavior Technician1801763065
  8. Winston GreeneChiropractor1174723654
  9. Bryan Greenfield, M.D.Pediatric Emergency Medicine (Pediatrics) Physician1841633690
  10. Susan Greenfield, DOPediatric Radiology Physician1710097167
  11. Lajia Greenhouse, LVNLicensed Vocational Nurse1881175537
  12. Erin Greenleaf, M.D.Vascular Surgery Physician1710244959
  13. Janet Greenlee, P.A.-CMedical Physician Assistant1447380761
  14. Carleigh Greenly, NPFamily Nurse Practitioner1659036358
  15. Betty Greenman, IBCLCLactation Consultant (Non-RN)1265786586
  16. Joe Greenwood, RSA, CSASurgical Assistant1578795092
  17. Katie Greenwood, M.D.Pediatric Hematology & Oncology Physician1538509005
  18. Lauren GreenwoodStudent in an Organized Health Care Education/Training Program1336834126
  19. Adelaide Greer, AU.D.Audiologist1194088393
  20. Dana Greer, NPFamily Nurse Practitioner1992210991
  21. Denise GreerBehavior Technician1427623800
  22. Emily Greer, CRNACertified Registered Nurse Anesthetist1992339915
  23. Jessica Greer, RNCritical Care Medicine Registered Nurse1811790876
  24. Judith Greer, APNObstetrics & Gynecology Nurse Practitioner1710149133
  25. Kathryn Greer, CRNACertified Registered Nurse Anesthetist1548454507
  26. Malcolm Greer, L.P.C.Professional Counselor1154587137
  27. Morgan GreerRegistered Nurse1780248245
  28. Natalie Greer, APRNAdult Health Nurse Practitioner1801450002
  29. Undrea GreerBehavior Technician1033877931
  30. Jeannette Greer-Brumbaugh, M.D.Dermatology Physician1255481693
  31. Brian Greet, MDClinical Cardiac Electrophysiology Physician1891011573
  32. Pamela Gregerson, MDPediatrics Physician1891003398
  33. Bryce Gregg, MSN, APRN, FNP-CFamily Nurse Practitioner1952944696
  34. Frederick Gregg, M.D.Diagnostic Radiology Physician1851382923
  35. James Gregg, MDDiagnostic Radiology Physician1518100049
  36. Justin Gregg, M.D.Urology Physician1093072324
  37. Lucile Gregg, M.D.Nephrology Physician1053686121
  38. Melanie Gregg, PH.D.Clinical Child & Adolescent Psychologist1417090010
  39. Victoria Gregg, MDPediatric Emergency Medicine (Pediatrics) Physician1407936768
  40. Shannon Gregorek, NP-CFamily Nurse Practitioner1790929099
  41. Igor Gregoric, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1043308844
  42. Giorgio Gregorio, LMTMassage Therapist1487545927
  43. Jason Gregorio, MDAnatomic Pathology & Clinical Pathology Physician1467643643
  44. Alyssa GregoryStudent in an Organized Health Care Education/Training Program1710611728
  45. Bryana Gregory, PHARMD, RPHNutrition Support Pharmacist1740160324
  46. Carly Gregory, PT, DPTPediatric Physical Therapist1437750650
  47. Gretchen Gregory, LMSWCase Manager/Care Coordinator1780028266
  48. Haley Gregory, APRN, NNP-BCNeonatal Nurse Practitioner1922767722
  49. James Gregory, MDSports Medicine (Orthopaedic Surgery) Physician1639335359
  50. James Gregory, MDStudent in an Organized Health Care Education/Training Program1487231502

The largest Texas cities

  1. San Antonio37,749
  2. Dallas36,304
  3. Austin26,585
  4. Fort Worth15,511
  5. El Paso11,091

All of Texas →

How to read this directory

Houston, Texas appears in the CMS National Plan and Provider Enumeration System with 61,221 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 Houston - 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 Houston 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 Houston is weighted toward Student in an Organized Health Care Education/Training Program (3,913 clinicians, followed by Family Nurse Practitioner with 2,588 and Pharmacist with 2,337). 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 Texas's population, Houston reports roughly 200.7 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.

For Houston 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 Houston, TX?

There are 61,221 registered healthcare providers in Houston, TX, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Houston?

The most common specialties in Houston are Student in an Organized Health Care Education/Training Program, Family Nurse Practitioner, Pharmacist, Behavior Technician, Professional Counselor. Student in an Organized Health Care Education/Training Program has the most providers with 3,913.

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.