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 224 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. Brianna NguyenBehavior Technician1093549297
  2. Ceez NguyenBehavior Technician1588491641
  3. Christine NguyenBehavior Technician1134807332
  4. Christy NguyenBehavior Technician1073405544
  5. Duc NguyenBehavior Technician1366146227
  6. Eileen NguyenBehavior Technician1699414706
  7. Emily NguyenBehavior Technician1306431952
  8. Ethan NguyenBehavior Technician1255188280
  9. Hailey NguyenBehavior Technician1871319939
  10. Hien NguyenBehavior Technician1801547831
  11. Isabella NguyenBehavior Technician1164371225
  12. Jeff NguyenBehavior Technician1568192128
  13. Jerry NguyenBehavior Technician1386394021
  14. Jessie NguyenBehavior Technician1336840560
  15. Jimmy NguyenBehavior Technician1548997133
  16. John NguyenBehavior Technician1790607968
  17. Joseph Nguyen, NONEBehavior Technician1710690193
  18. Kathleen NguyenBehavior Technician1881545630
  19. Kayla NguyenBehavior Technician1033952023
  20. Kevin NguyenBehavior Technician1548973209
  21. Leah Nguyen, PHARM.DPharmacist1164967477
  22. Long NguyenBehavior Technician1063396984
  23. Lynette NguyenBehavior Technician1619693694
  24. Minh NguyenBehavior Technician1154206209
  25. Noelle NguyenBehavior Technician1053246488
  26. Olivia NguyenBehavior Technician1356125165
  27. Pamela NguyenBehavior Technician1154035350
  28. Phuong Nguyen, RPHPharmacist1629370325
  29. Phuong NguyenBehavior Technician1063236164
  30. Richard NguyenBehavior Technician1174210223
  31. Shelbie NguyenBehavior Technician1841077831
  32. Sophia NguyenBehavior Technician1346191327
  33. Tawny NguyenBehavior Technician1063067973
  34. Theresa NguyenBehavior Technician1649896622
  35. Tien NguyenBehavior Technician1346046315
  36. Tiffany Nguyen, PHARM.D.Pharmacist1811929706
  37. Tiffany NguyenBehavior Technician1205544178
  38. Tommy NguyenBehavior Technician1396565271
  39. Trang NguyenBehavior Technician1760308563
  40. Tristan NguyenBehavior Technician1932966488
  41. VI NguyenBehavior Technician1134008675
  42. Britney NhanBehavior Technician1043934243
  43. Katrina Nhan, BCBABehavior Analyst1962053678
  44. Vinh Hoa Brittanie NhanBehavior Technician1477246874
  45. Kaylee NheanBehavior Technician1548983851
  46. Hsu Thet Htar Ni NiBehavior Technician1538985171
  47. Lisset NicanorBehavior Technician1104656461
  48. Andre NicassioBehavior Technician1932940079
  49. Natasha NicholasBehavior Technician1447183470
  50. Imia NichollsBehavior Technician1023894946

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.