Monica Guillen
Physician Assistant · Los Banos, CA
Monica Guillen is a physician assistant with a practice address in Los Banos, California, and NPI 1801480546, issued on Feb 23, 2021. Check the license (California 66659, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Monica Guillen
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 66659 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2520 E Pacheco Blvd, Los Banos, CA 93635
- Phone
- (559) 664-4000
- Enumerated
- Feb 23, 2021
- Record last updated
- Jul 1, 2025
- Fax
- (559) 675-5224
- Medicare enrollment
- Enrolled (PECOS I20251009001881); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 2520 E Pacheco Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alireza Shams, M.D.General Practice Physician1215323183
Verify Monica Guillen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 66659Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Monica Guillen among 14,451 physician assistant records in California
Monica Guillen is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2021, is newer than 67% of them.
- NPI issued2021 · 67% of these records are older, 27% newer
- In a Medicare fileNo · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2024 · median 2018 among the 7,214 with a school on file
- Record last updated2025 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 physician assistant records list a practice address in Los Banos
They are 11 of the 441 NPPES records with a practice address in Los Banos, and 14,451 physician assistant records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 14,451 in California → Every provider in Los Banos → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Vance Angeles, PALos Banos, CA 936351952347502
- Lara AvedianLos Banos, CA 936351972072528
- Daniel Eustace, P.A.-C.Los Banos, CA 936351801825195
- Rohit Kadambi, PA-CLos Banos, CA 936351821498817
- Linda MorfordLos Banos, CA 936351497868657
- Alex Schechterly, PA-CLos Banos, CA 936351083371140
- Apinya Smothers, PA-CLos Banos, CA 936351336699065
- Juliette Tamagni, PA-CLos Banos, CA 936351225196884
Common questions
What is Monica Guillen's NPI number?
Monica Guillen's National Provider Identifier (NPI) is 1801480546, issued on Feb 23, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Monica Guillen located?
The NPPES record lists a practice address at 2520 E Pacheco Blvd, Los Banos, CA, 93635. Phone: (559) 664-4000. Providers update this record themselves, so call before visiting.
How can I verify Monica Guillen's license?
NPPES lists California license number 66659, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
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.