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 126 of 347.
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
- Arlene GuerreroBehavior Technician1598362832
- Bryan GuerreroBehavior Technician1407738602
- Daniel GuerreroBehavior Technician1386400844
- Dariel GuerreroBehavior Technician1619898863
- Dominique GuerreroBehavior Technician1962372060
- Elizabeth GuerreroBehavior Technician1598635492
- Evangelyna GuerreroBehavior Technician1871330373
- Joseph GuerreroBehavior Technician1417780529
- Kimberly GuerreroBehavior Technician1205547783
- Kimberly GuerreroBehavior Technician1134915101
- Miranda GuerreroBehavior Technician1255071031
- Nicole GuerreroBehavior Technician1013795103
- Yzabella GuerreroBehavior Technician1205724820
- Nayeli Guerrero RiveraBehavior Technician1528844404
- Kalyssa GuerrierBehavior Technician1275241143
- Michael GuessBehavior Technician1649142043
- Alexa GuevaraBehavior Technician1003678509
- Bethany GuevaraBehavior Technician1952110736
- Jessie GuevaraBehavior Technician1902620008
- Joseph GuevaraBehavior Technician1639966203
- Juliana GuevaraBehavior Technician1720726243
- Roberto GuevaraBehavior Technician1407670516
- Briana Guevara BenitezBehavior Technician1962181511
- Justin GueyeBehavior Technician1992530646
- Peter GugliuzzaBehavior Technician1598560088
- Pamela GuilbaultBehavior Technician1427880152
- Winecarde GuillaumeBehavior Technician1346075058
- Fatima GuillenBehavior Technician1598623753
- Josselin GuillenBehavior Technician1942920764
- Katherine GuillenBehavior Technician1164372454
- Marlene GuillenBehavior Technician1427781368
- Ruby GuillenBehavior Technician1073435244
- Victoria GuillenBehavior Technician1083457519
- Valeria Guillen-ArreolaBehavior Technician1992685937
- Diana Guillen-MemijeBehavior Technician1285382077
- Adam GuillermoBehavior Technician1780510230
- Madeleine GuilmetteBehavior Technician1790652063
- Nicole GuiltinanBehavior Technician1174251821
- Pamela GuinnBehavior Technician1154027126
- Tezia GuinnBehavior Technician1881409027
- Valeria GuiterrezBehavior Technician1316729015
- Emerson GuizarBehavior Technician1104557891
- Jessica GuizarBehavior Technician1699471664
- Stephanie GuizarBehavior Technician1801543525
- Kathleen GundersonBehavior Technician1851224661
- Shakira GunnBehavior Technician1588552822
- Shane GunnBehavior Technician1972282556
- Yarelis GunterBehavior Technician1366329286
- Shelley GupilanBehavior Technician1336782002
- Amanda Gurrola, MSSpeech-Language Pathologist1720649403
The largest California cities
- Los Angeles69,537
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
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.