NPPES file of Aug 9, 2026

Doctors and health care providers in La Jolla, CA

3,648 individual NPPES records list a practice address in La Jolla, 59th of 812 California cities. The largest group is students in training: 317, 9% of the city's records, against 4% across California. Page 41 of 73.

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

The 8 largest groups in La Jolla

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

La Jolla in California

  • Rank in California59th of 812 cities by records
  • Share of the state0.4% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups18.1% of all records

Compared with California as a whole, La Jolla has 7.7× the state's share of hematology & oncology physician records and 0.37× its share of marriage & family therapist records.

Providers in La Jolla, alphabetically

  1. Kelsey MarckstadtNeonatal Intensive Care Registered Nurse1457184152
  2. Suzanne Marcus, PH.DPsychologist1508900804
  3. Elana Marder, MS, RD, LDNRegistered Dietitian1477056711
  4. Tania Marek, NPFamily Nurse Practitioner1023141199
  5. Carla Marienfeld, MDAddiction Psychiatry Physician1104007657
  6. Vincent Marin, M.D.Plastic Surgery Physician1538207808
  7. Nikolas Marino, MD, MBAHospitalist Physician1316523988
  8. Mark Mariski, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1104467885
  9. Nancy Markel, PH.D.Clinical Neuropsychologist1720119530
  10. Lisa Marks, LMFTMarriage & Family Therapist1306325220
  11. Buba Marong, MDAdvanced Heart Failure and Transplant Cardiology Physician1124523147
  12. Luiza Marques De Oliveira MartinsStudent in an Organized Health Care Education/Training Program1508614983
  13. Barbara Marquez, PHDStudent in an Organized Health Care Education/Training Program1295521516
  14. Laura Marrone, MDPsychiatry Physician1205128709
  15. Jillian Marrs, PA-CMedical Physician Assistant1265734149
  16. Christopher Marsh, M.D.Transplant Surgery Physician1023098043
  17. Marilyn Marshall, MFTMarriage & Family Therapist1649440017
  18. Stuart Marshall, M.D.Orthopaedic Surgery Physician1154345445
  19. Noreen Marsland, PSYD, MPA, MSWClinical Psychologist1225029309
  20. Kendall Martin, M.D.Diagnostic Radiology Physician1912169335
  21. Samuel MartinezOncology Pharmacist1902447782
  22. Susana Martinez, PSYDMental Health Counselor1255730230
  23. Tessa Martinez, NPNurse Practitioner1164307930
  24. Annemarie Martland, NPNurse Practitioner1578704409
  25. Christopher Marx, M.D.Endocrinology, Diabetes & Metabolism Physician1811958929
  26. Ella MaserRegistered Nurse1326906058
  27. Ahmad Mashayekan, RPHPharmacist1295306512
  28. Jessica Mashayekhan, PHARMDPharmacist1104661099
  29. Lucia Masi, PA-CSurgical Physician Assistant1104210913
  30. Diana Maslov, MDHospitalist Physician1659834885
  31. James Mason, M.D.Hematology & Oncology Physician1497717730
  32. Vivie MassCommunity Health Worker1720871601
  33. Alexandra Massey, PA-CPhysician Assistant1013538776
  34. Natalie Masson, PHDClinical Psychologist1306005566
  35. Ramona Master, MDInternal Medicine Physician1851429617
  36. Karla Materna, PH.D.Psychologist1932157518
  37. Kurt Mathews, M.D.Anatomic Pathology & Clinical Pathology Physician1770615379
  38. Suzanne Mathews, PH.D.Clinical Psychologist1780820415
  39. Asma MathlouthiSurgery Physician1932847001
  40. Beth Mattera, NPNurse Practitioner1255346607
  41. Amanda MattheStudent in an Organized Health Care Education/Training Program1407721525
  42. Taylor Mattioli, PA-CPhysician Assistant1689146367
  43. Gregory Mattson, M. D.Family Medicine Physician1922155282
  44. Gayane Matusov, M.D.Student in an Organized Health Care Education/Training Program1104569466
  45. Wendi Maurer, PH.D.Clinical Psychologist1679596282
  46. Jana Mauricio-LeeStudent in an Organized Health Care Education/Training Program1336934280
  47. Brent Mausbach, PHDClinical Psychologist1164847638
  48. Christyanne Maxson, MDFamily Medicine Physician1750897500
  49. Collin Mayemura, MDHospitalist Physician1609452366
  50. Andrew Mayer, MDGastroenterology Physician1215949201

The largest California cities

  1. Los Angeles69,537
  2. San Diego52,937
  3. San Francisco38,143
  4. Sacramento33,083
  5. San Jose20,925

All of California →

How to read this directory

La Jolla, California appears in the CMS National Plan and Provider Enumeration System with 3,648 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 La Jolla - 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 La Jolla 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 La Jolla is weighted toward Student in an Organized Health Care Education/Training Program (317 clinicians, followed by Pharmacist with 185 and Internal Medicine Physician with 158). 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 California's population, La Jolla reports roughly 9.4 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 California's most common specialties, Behavior Technician is the most prominent one with no provider currently listing a La Jolla practice address, a coverage gap La Jolla patients typically fill by traveling to a larger nearby hub.

For La Jolla 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 La Jolla, CA?

There are 3,648 registered healthcare providers in La Jolla, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in La Jolla?

The most common specialties in La Jolla are Student in an Organized Health Care Education/Training Program, Pharmacist, Internal Medicine Physician, Physician Assistant, Clinical Psychologist. Student in an Organized Health Care Education/Training Program has the most providers with 317.

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.