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MR. WILLIAM HENRY GUO PA-C
NPI 1538873195
Physician Assistant - Surgical in Mission Hills, CA

Active since January 09, 2023PECOS EnrolledAccepts Medicare Assignment
11550 INDIAN HILLS RD STE 261, MISSION HILLS, CA 91345(818) 361-0917(818) 361-1606 Get Directions Write a Review

NPPES record last updated: October 17, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Sep 5, 2025, Jun 19, 2025, Jan 9, 2023 (3 updates tracked since 2023).

About Mr. William Henry Guo Pa-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. WILLIAM HENRY GUO PA-C (NPI 1538873195) is an individual surgical provider in Mission Hills, California, licensed in California (PA62102) and active in the NPI registry since January 2023. He is enrolled in Medicare PECOS, is affiliated with Asante Rogue Regional Medical Center, and is a graduate of Duke University School Of Medicine (2022).

NPPES Registry Identity

NPI1538873195
Entity TypeIndividualMale
Primary Taxonomy363AS0400X
Provider Legal NameMR. WILLIAM HENRY GUOCredential: PA-C
Location Address11550 INDIAN HILLS RD STE 261Mission Hills, CA 91345-1244
Mailing Address453 N Altadena Dr Unit 1Pasadena, CA 91107-2556 · (909) 348-4322
Phone(818) 361-0917
Fax(818) 361-1606
Sole ProprietorNo
Medical School CMSDuke University School Of MedicineGraduated 2022
Enumeration DateJanuary 9, 2023
Last NPPES UpdateOctober 17, 20253 updates tracked since enumeration
NPPES CertifiedOctober 17, 2025
✔ NPI 1538873195 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician Assistant · SurgicalPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363AS0400X
License✔ Licensed in CA · PA62102
Also ListedPhysician AssistantTaxonomy 363A00000X · License PA62102 (CA)
11550 INDIAN HILLS RD STE 261, Mission Hills, CA 91345
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BridgeSpan Health Company, Regence BlueCross BlueShield of Oregon.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. William Henry Guo Pa-c is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6103272091
PECOS Enrollment IDI20250611003505
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
101 services77 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
63 services63 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
30 services29 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
28 services25 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
27 services27 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
23 services23 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Asante Rogue Regional Medical Center

Acute Care Hospitals · Medford, OR
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number380018
Location2825 E Barnett RoadMedford, OR 97504 · Jackson County
Emergency services Birthing friendly

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GABRIEL RAY WIRTZ FIERRO
Physician Assistant
11550 INDIAN HILLS RD STE 261
MISSION HILLS, CA 91345
Los Angeles County (818) 847-6570
ADITYA KRISHNA IYER MD
Neurological Surgery
11550 INDIAN HILLS RD STE 261
MISSION HILLS, CA 91345
Los Angeles County (818) 847-6570
CHRISTOPHER GEORGE GARDHOUSE PA-C
Physician Assistant (Surgical)
11550 INDIAN HILLS RD STE 261
MISSION HILLS, CA 91345
Los Angeles County (818) 361-0917
MR. FRANCISCO ANTONIO DE LA PARRA P.A.-C
Physician Assistant
11550 INDIAN HILLS RD STE 261
MISSION HILLS, CA 91345
Los Angeles County (818) 361-0917

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Guo's NPI number?

The NPI number for William Guo is 1538873195. It was assigned to this individual provider in the NPPES registry on January 9, 2023.

Where is William Guo located?

William Guo practices at 11550 Indian Hills Rd Ste 261, Mission Hills, CA 91345. The listed phone number is (818) 361-0917.

What is William Guo's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Surgical, with taxonomy code 363AS0400X.

Is William Guo enrolled in Medicare?

Yes. William Guo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does William Guo accept?

Health plans from BridgeSpan Health Company and Regence BlueCross BlueShield of Oregon list William Guo as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is William Guo affiliated with any hospitals?

According to CMS data, William Guo is affiliated with Asante Rogue Regional Medical Center.

When was this NPI record last updated?

The NPPES record for William Guo was last updated on October 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.