NPPES file of Aug 9, 2026

Doctors and health care providers in Monrovia, CA

17,347 individual NPPES records list a practice address in Monrovia, 8th of 812 California cities. The largest group is behavior technician: 16,526, 95% of the city's records, against 18% across California. Page 228 of 347.

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

The 8 largest groups in Monrovia

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

Monrovia in California

  • Rank in California8th of 812 cities by records
  • Share of the state1.8% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups96.4% of all records
  • Behavior Technician rank1st of the 10 California cities with the most

Compared with California as a whole, Monrovia has 5.4× the state's share of behavior technician records and 0.09× its share of marriage & family therapist records.

Providers in Monrovia, alphabetically

  1. Belinda NyirisiBehavior Technician1245157460
  2. Lucie NyotaBehavior Technician1063269090
  3. Esther NzereBehavior Technician1366274094
  4. Carol NzeribeBehavior Technician1730927443
  5. Megan O'BrienBehavior Technician1497607568
  6. Timothy O'BrienBehavior Technician1518706928
  7. Bernadette O'ConnellBehavior Technician1003636580
  8. Claire O'ConnellBehavior Technician1255120564
  9. Marissa O'ConnorBehavior Technician1457246795
  10. Carol O'FlahertyBehavior Analyst1891575395
  11. Skyler O'HanleyBehavior Technician1770302994
  12. Kathryn O'HaraBehavior Technician1497553945
  13. Susanne O'LareyBehavior Technician1760192009
  14. Tori O'NealBehavior Technician1073259248
  15. Aidan O'NeillBehavior Technician1053202648
  16. Corie O'NeillBehavior Technician1891616041
  17. Castea O'SheaBehavior Technician1457185639
  18. Charlene O'Sullivan-KloppenburgBehavior Technician1609652924
  19. Arlene ObandoBehavior Technician1073194338
  20. Kamea ObandoBehavior Technician1679252233
  21. Kimberly Obando-CruzBehavior Technician1396584207
  22. Jennifer OberlanderBehavior Technician1619558970
  23. Anita ObiBehavior Technician1922650241
  24. Jeweliana ObregonBehavior Technician1154285518
  25. Dora ObrienBehavior Technician1326873076
  26. Shelby ObrienBehavior Technician1790484699
  27. Angel OcampoBehavior Technician1548119035
  28. Jeremy OcampoBehavior Technician1023738630
  29. Patricia OcampoBehavior Technician1255985909
  30. Rosa OcampoBehavior Technician1497680292
  31. Maribel Ocampo BritoBehavior Technician1548945611
  32. Shaina OcasioBehavior Technician1629710819
  33. Stephanie OceaneBehavior Technician1598594954
  34. Valeria OcegueraBehavior Technician1467100537
  35. Yvette Oceguera OlahBehavior Technician1255172342
  36. Julianna Oceguera-BlancoBehavior Technician1548093537
  37. Alejandra OchoaBehavior Technician1720813447
  38. Christina OchoaBehavior Technician1659148948
  39. Ebonnie OchoaBehavior Technician1255057501
  40. Evelyn OchoaSocial Worker1669031217
  41. Gloria OchoaBehavior Technician1295590248
  42. Jessica OchoaBehavior Technician1467108464
  43. Jocelyn OchoaBehavior Technician1538918644
  44. Maria OchoaBehavior Technician1396524203
  45. Sophia OchoaBehavior Technician1477385953
  46. Xavier OchoaBehavior Technician1073472304
  47. Yancy Ochoa SilvaBehavior Technician1609727452
  48. Diego Ochoa-BermudezBehavior Technician1700625514
  49. Gia OchsenbeinBehavior Technician1114819786
  50. Skyy OchsnerBehavior Technician1619601275

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

Monrovia, California appears in the CMS National Plan and Provider Enumeration System with 17,347 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 Monrovia - 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 Monrovia 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 Monrovia is weighted toward Behavior Technician (16,526 clinicians, followed by Behavior Analyst with 109 and Marriage & Family Therapist with 94). 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, Monrovia reports roughly 44.5 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, Addiction (Substance Use Disorder) Counselor is the most prominent one with no provider currently listing a Monrovia practice address, a coverage gap Monrovia patients typically fill by traveling to a larger nearby hub.

For Monrovia 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 Monrovia, CA?

There are 17,347 registered healthcare providers in Monrovia, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Monrovia?

The most common specialties in Monrovia are Behavior Technician, Behavior Analyst, Marriage & Family Therapist, Speech-Language Pathologist, Student in an Organized Health Care Education/Training Program. Behavior Technician has the most providers with 16,526.

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.