Giulia Guerena
Physician Assistant · Whittier, CA
Giulia Guerena is a physician assistant with a practice address in Whittier, California, and NPI 1063127082, issued on Jan 16, 2023. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Giulia Guerena
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 12401 Washington Blvd, Whittier, CA 90602
- Phone
- (562) 698-0811
- Enumerated
- Jan 16, 2023
- Record last updated
- Apr 25, 2025
- Medicare enrollment
- Enrolled (PECOS I20230616001286); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 12401 Washington Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anas Abu-Khader, MDInternal Medicine Physician1881180784
- Johanna Aceves, NPNurse Practitioner1841415502
- Kariann Akiyama, MS, RDN, CNSCRegistered Dietitian1639870009
- Syed Ali, MDAnesthesiology Physician1295775625
- Jamee Ambariantz, PAPhysician Assistant1790726123
- Talin Azilazyan, PHARMDPharmacist1700739372
Verify Giulia Guerena in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average physician assistant in 2024
86 Medicare Part D claims for 69 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Torrance Health Association IncRedondo Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Giulia Guerena among 14,451 physician assistant records in California
Giulia Guerena 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. Its NPI, issued in 2023, is newer than 80% of them.
- NPI issued2023 · 80% of these records are older, 13% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2022 · 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).
89 physician assistant records list a practice address in Whittier
They are 89 of the 2,836 NPPES records with a practice address in Whittier, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Whittier → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Jamee Ambariantz, PAWhittier, CA 906021790726123
- Maricela Berzunza, P.A.Whittier, CA 906021205060936
- Marietta Breaux, PA-CWhittier, CA 906021346563871
- Jennifer Faggionato, PAWhittier, CA 906021578508503
- Michael Johnson, PAWhittier, CA 906021497791263
- Paula Meyer, PAWhittier, CA 906021255373783
- Oscar Norona, PA-CWhittier, CA 906021548598535
- James Panlilio, PAWhittier, CA 906021174833263
Common questions
What is Giulia Guerena's NPI number?
Giulia Guerena's National Provider Identifier (NPI) is 1063127082, issued on Jan 16, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Giulia Guerena located?
The NPPES record lists a practice address at 12401 Washington Blvd, Whittier, CA, 90602. Phone: (562) 698-0811. Providers update this record themselves, so call before visiting.
How can I verify Giulia Guerena's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Giulia Guerena prescribe under Medicare Part D?
In 2024, Giulia Guerena had 86 Medicare Part D claims for 69 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. 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.