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 409 of 1,225.

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

The 8 largest groups in Houston

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. Jamie Grigsby, WHNPWomen's Health Nurse Practitioner1447946264
  2. Steven Grigsby, MD, PHDStudent in an Organized Health Care Education/Training Program1598559353
  3. Tammie GrigsbyCase Manager/Care Coordinator1700532777
  4. Uzziah Grigsby, D.C.Chiropractor1710190970
  5. Ricardo Grillo-Paris, M.D.Pediatrics Physician1316984735
  6. Allison Grim, MDEmergency Medicine Physician1104676972
  7. Leo Grim, D.C.Chiropractor1750454021
  8. Grace GrimaldoPharmacy Technician1154059236
  9. Jason GrimaldoPhysical Therapist1649885328
  10. Rebecca Grimaldo, R.N., FNP-CFamily Nurse Practitioner1457433757
  11. Tristan Grimaldo, FNP-CFamily Nurse Practitioner1447626015
  12. Amanda Grimes, M.D.Pediatric Hematology & Oncology Physician1821259805
  13. Christopher Grimes, LCSWClinical Social Worker1982080800
  14. Kevin Grimes, MDInfectious Disease Physician1023137494
  15. Love GrimesSpecialist1568593614
  16. Lynn Grimes, RN, ANPAdult Health Nurse Practitioner1356439376
  17. Maranda Grimes, FNP-CFamily Nurse Practitioner1962863373
  18. Margaret Grimes, CRNACertified Registered Nurse Anesthetist1619954187
  19. Sandra Grimes, MDPsychiatry Physician1003828781
  20. Daniel Grimmer, MDAnatomic Pathology & Clinical Pathology Physician1427010610
  21. Luke GrimmettRegistered Nurse1518467547
  22. Alejandra Grimsley, APRN-CNPWomen's Health Nurse Practitioner1558631226
  23. Maria Theresa Grino, CRNACertified Registered Nurse Anesthetist1346572294
  24. Michaela Grinsfelder, MDObstetrics & Gynecology Physician1437310232
  25. William Grinstead, MD, FACCCardiovascular Disease Physician1306859533
  26. Maria Grisales, DDSDentist1598294670
  27. Kathleen Grisdale, RN, FNPFamily Nurse Practitioner1730260316
  28. Julie Grissett, GNPGerontology Nurse Practitioner1538471446
  29. Meredith Grissett, COTA/LOccupational Therapy Assistant1760767222
  30. Garrett Grissim, MDStudent in an Organized Health Care Education/Training Program1144088139
  31. Larry Grissom, M.D.Diagnostic Radiology Physician1164400644
  32. Maureen Grissom, PH.D.Clinical Psychologist1144411513
  33. Barry Gritz, M.D.Psychiatry Physician1487635892
  34. Ellen Gritz, PHDClinical Psychologist1629245873
  35. Elizabeth Grizzaffi, PA-CPhysician Assistant1124311584
  36. Kathryn Grizzaffi, COTAOccupational Therapy Assistant1427322619
  37. Anne Grizzle, LCSWClinical Social Worker1225243116
  38. Heather Grizzle, RPA/RA (CBRPA)Radiology Practitioner Assistant1346482999
  39. Michael Groat, PH.D.Clinical Psychologist1134331176
  40. Katherine Grobengieser, DOStudent in an Organized Health Care Education/Training Program1851186241
  41. Mark Groblewski, LCSWClinical Social Worker1790864221
  42. Robert Grodner, D.D.S.General Practice Dentistry1013012483
  43. Alfred Groen, MDAnesthesiology Physician1396895876
  44. Erin Groeteke, LPCProfessional Counselor1730936113
  45. Benjamin Groff, OTOccupational Therapist1356808695
  46. Connor GroffStudent in an Organized Health Care Education/Training Program1326807082
  47. Geoffrey Groff, M.D.Family Medicine Physician1730184995
  48. Holli Groff, O.D.Optometrist1790750867
  49. Kathleen Groff, CCCSLPSpeech-Language Pathologist1972809267
  50. Luke GromePlastic Surgery Physician1730610064

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.