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 234 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. Estelle OsayimwenBehavior Technician1699659524
  2. Tyler OsbiaBehavior Technician1871220863
  3. Christopher OsbornBehavior Technician1205563079
  4. Aurora OsborneBehavior Technician1861222127
  5. Ryan OsborneBehavior Technician1689307571
  6. Debboney OsbourneBehavior Technician1245102672
  7. Shanielle OsbourneBehavior Technician1659240026
  8. Tommy OsceolaBehavior Technician1194451724
  9. Rachel OseiBehavior Technician1073236451
  10. Sylvia Osei-BoatengBehavior Technician1245062389
  11. Olabisi OseniBehavior Technician1689546095
  12. Hayley OshiroBehavior Technician1376308247
  13. Adeseke OshoBehavior Technician1770462210
  14. Patrick OsioBehavior Technician1376434969
  15. Michelle OsipianBehavior Technician1851282446
  16. Nurto OsmanBehavior Technician1043005051
  17. Rahma OsmanBehavior Technician1376402511
  18. Siham OsmanBehavior Technician1841037520
  19. Anthony OsnayaBehavior Technician1063219624
  20. Ana OsorioBehavior Technician1134956204
  21. Ricky OsorioBehavior Technician1356261812
  22. Elizabeth Osorio EspinalBehavior Technician1811641509
  23. Armando Osorio TenorioBehavior Technician1952041634
  24. Alejandro Osorio-PerezBehavior Technician1386436251
  25. Doneshia OsteenBehavior Technician1609726991
  26. Sofiia OstroushkoBehavior Technician1609694918
  27. Adam OsunaBehavior Technician1174492540
  28. Amy OsunaBehavior Technician1457116485
  29. Jazmine OsunaBehavior Technician1255294435
  30. Natalia OsunaBehavior Technician1841040227
  31. Araceli Otanez ArredondoBehavior Technician1063156826
  32. Jazel OteroBehavior Technician1356106686
  33. Natalie OttenheimerBehavior Technician1730059635
  34. Ndip Otun EttaBehavior Technician1033946116
  35. Jason OuBehavior Technician1497610992
  36. Wenjie OuBehavior Technician1942096359
  37. Miriam OuassouBehavior Technician1346185360
  38. April OuelletteBehavior Technician1609696947
  39. Bryston OukBehavior Technician1275390429
  40. Danny OunmanoBehavior Technician1326871435
  41. Emily OutlawBehavior Technician1164255147
  42. Katelynn OutryBehavior Technician1093674152
  43. Sherin OuyangBehavior Technician1477134153
  44. Anna OvalleBehavior Technician1932060324
  45. William Overman, O.D.Optometrist1023169331
  46. Courtney OvertonBehavior Technician1154244408
  47. Denean Overton-RussellMental Health Counselor1003382144
  48. Amelia OviattBehavior Technician1033837034
  49. Berthulie OvideBehavior Technician1568200475
  50. Deanna OviedoBehavior Technician1013664887

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.