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 231 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. Kenia Olvera PalmaBehavior Technician1114673126
  2. Negena OmarBehavior Technician1831831015
  3. Lucas OmdahlBehavior Technician1992480388
  4. Aida OmidiBehavior Technician1679401988
  5. Jasmine OneilBehavior Technician1811683188
  6. Olivia Ong, MDGlaucoma Specialist (Ophthalmology) Physician1124021688
  7. Erling OnsagerBehavior Technician1124892161
  8. Anissa OntiverosBehavior Technician1871336743
  9. Tatiana OnuskanichBehavior Technician1538814884
  10. Ahaoma OnyebuchiBehavior Technician1689552663
  11. Kyaw Hsan OoBehavior Technician1457167538
  12. Falisha Ooka-RevanderBehavior Technician1760202642
  13. Stephanie OpataBehavior Technician1487401345
  14. Lucian OpilaBehavior Technician1396570867
  15. Naana OppongBehavior Technician1184434300
  16. Anna Maria OraBehavior Technician1356191498
  17. Raul OraBehavior Technician1780349183
  18. Ashley OrangeBehavior Technician1225751530
  19. Kaylynn OrangeBehavior Technician1053096644
  20. Dana OrantesBehavior Technician1720793839
  21. Juan OrdazBehavior Technician1548183809
  22. Kaylin OrdonezBehavior Technician1538995543
  23. Ella OrdunaBehavior Technician1467328666
  24. Danny OreaBehavior Technician1518741321
  25. Jose OreaBehavior Technician1487495529
  26. Leslie OregelBehavior Technician1366258444
  27. Samantha OregelBehavior Technician1407688138
  28. Jeannette OrejelBehavior Technician1457293334
  29. Jonathan OrellanaBehavior Technician1770260143
  30. Monica OrellanaBehavior Technician1104635309
  31. Arlene Organiz MayaresBehavior Technician1245185073
  32. Leah OrizaBehavior Technician1477375897
  33. Lucy OrizonteBehavior Technician1568186427
  34. Lydia OrlowskiBehavior Technician1023952363
  35. Sam OrmondeBehavior Technician1154104032
  36. Michael OrmsbyBehavior Technician1730870296
  37. Nicole OrndorffBehavior Technician1275247470
  38. Janette OrnelasBehavior Technician1790609113
  39. Natalie OrnelasBehavior Technician1508797580
  40. Jeremy Micheal OroBehavior Technician1699629352
  41. Ana OropezaBehavior Technician1487346060
  42. Denisha OropezaBehavior Technician1124864400
  43. Sara OropezaBehavior Technician1164276556
  44. Deztony OroscoBehavior Technician1760115356
  45. Samara OroscoBehavior Technician1588496210
  46. Angela OrozcoMarriage & Family Therapist1124629084
  47. Carla OrozcoBehavior Technician1467174763
  48. Carolina OrozcoProfessional Counselor1619578226
  49. Cristina OrozcoBehavior Technician1861321200
  50. Daniela OrozcoBehavior Technician1003524984

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.