William Henry Guo, PA-C
Surgical Physician Assistant · Mission Hills, CA
William Henry Guo, PA-C is a surgical physician assistant with a practice address in Mission Hills, California, and NPI 1538873195, issued on Jan 9, 2023. Check the license (California PA62102, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Henry Guo
- Credential
- PA-C
- Primary taxonomy
- Surgical Physician Assistant 363AS0400X
- License number
- PA62102 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11550 Indian Hills RD Ste 261, Mission Hills, CA 91345
- Phone
- (818) 361-0917
- Enumerated
- Jan 9, 2023
- Record last updated
- Oct 17, 2025
- Fax
- (818) 361-1606
- Medicare enrollment
- Enrolled (PECOS I20250611003505); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 2022
- Entity
- Type 1 · individual
8 nearest surgical physician assistant records → All 1,075 in California → Look up another NPI →
Also registered at 11550 Indian Hills RD Ste 261
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Francisco De La Parra, P.A.-CPhysician Assistant1629472196
- Christopher Gardhouse, PA-CSurgical Physician Assistant1508432030
- Aditya Iyer, MDNeurological Surgery Physician1447695325
- James Lee, MDPlastic Surgery Physician1225065659
- Gabriel Wirtz FierroPhysician Assistant1073262549
Verify William Henry Guo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA62102Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average surgical physician assistant in 2024
123 Medicare Part D claims for 68 beneficiaries, against an average of 304 among the 10,174 providers of this specialty who prescribed in Part D. 47 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen27 claims
- Gabapentin15 claims
- Oxycodone-Acetaminophen13 claims
- Methylprednisolone11 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
- Providence Medical InstituteLaguna Niguel, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Henry Guo among 1,075 surgical physician assistant records in California
William Henry Guo, PA-C is one of 1,075 surgical physician assistant records with a practice address in California. 79% 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 92% of them.
- NPI issued2023 · 92% of these records are older, 4% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2022 · median 2012 among the 649 with a school on file
- Record last updated2025 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AS0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Physician Assistant providers in California
There are 1,075 surgical physician assistant records in California.
All 1,075 in California → Every provider in Mission Hills → Surgical Physician Assistant nationwide →
The 8 surgical physician assistant records with the nearest ZIP codes
- Luis Cadena, MMS, PA-CMission Hills, CA 913451518340371
- Jonathan De Guzman, PAMission Hills, CA 913451225121924
- Christopher Gardhouse, PA-CMission Hills, CA 913451508432030
- Brian LengCanyon Country, CA 913511710673108
- Maureen Aoys, DC, MS, PA-CValencia, CA 913551619208832
- Todd Armen, PA-CReseda, CA 913351063536522
- Michael Gonzalez, PA-CSanta Clarita, CA 913551356833578
- Michelle Murillo, PA-CReseda, CA 913351952581787
Common questions
What is William Henry Guo, PA-C's NPI number?
William Henry Guo, PA-C's National Provider Identifier (NPI) is 1538873195, issued on Jan 9, 2023. An NPI identifies a provider in billing; it is not a license.
Where is William Henry Guo, PA-C located?
The NPPES record lists a practice address at 11550 Indian Hills RD Ste 261, Mission Hills, CA, 91345. Phone: (818) 361-0917. Providers update this record themselves, so call before visiting.
How can I verify William Henry Guo, PA-C's license?
NPPES lists California license number PA62102, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William Henry Guo, PA-C prescribe under Medicare Part D?
In 2024, William Henry Guo, PA-C had 123 Medicare Part D claims for 68 beneficiaries; the average among surgical physician assistant prescribers was 304. 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.