William Woo, M.D.
Family Medicine Physician · Anaheim, CA
William Woo, M.D. is a family medicine physician with a practice address in Anaheim, California, and NPI 1356647739, issued on Feb 2, 2011. Check the license (California A115071, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Woo
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A115071 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1188 N Euclid St, Anaheim, CA 92801
- Phone
- (888) 988-2800
- Enumerated
- Feb 2, 2011
- Record last updated
- Dec 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20120120000154); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1188 N Euclid St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Syed Ahmed, PHARMDPharmacist1780478875
- Eileen Arcebal, M.A., CCC-SLPSpeech-Language Pathologist1295855641
- Amalia Arizpe-Fernandez, LMFTProfessional Counselor1205033792
- Daniel Arvesen, M.A., LMFTMarriage & Family Therapist1659433860
- Gina Bodnar, M.S.Marriage & Family Therapist1558553669
Verify William Woo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A115071Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average family medicine physician in 2024
2,837 Medicare Part D claims for 262 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 87 claims were for opioids.
Most prescribed
- Atorvastatin Calcium268 claims
- Amlodipine Besylate119 claims
- Losartan Potassium102 claims
- Metformin Hcl Er100 claims
- Levothyroxine Sodium86 claims
- Simvastatin83 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
- Southern California Permanente Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Woo among 17,133 family medicine physician records in California
William Woo, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 63% of them.
- NPI issued2011 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2009 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
234 family medicine physician records list a practice address in Anaheim
They are 234 of the 9,018 NPPES records with a practice address in Anaheim, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Anaheim → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Marcelino Arenas, PA-CAnaheim, CA 928011184622862
- Samir Azzam, M.DAnaheim, CA 928011891744538
- Hing Be, D.O.Anaheim, CA 928011780623512
- Cynthia Haq, MDAnaheim, CA 928011881646917
- Maria Elena Hetts, M.D.Anaheim, CA 928011154308773
- Diane Jerng, MDAnaheim, CA 928011154321123
- Paula Joubert-Greene, MDAnaheim, CA 928011437156056
- Mary Therese Kerrigan, M.DAnaheim, CA 928011215920038
Common questions
What is William Woo, M.D.'s NPI number?
William Woo, M.D.'s National Provider Identifier (NPI) is 1356647739, issued on Feb 2, 2011. An NPI identifies a provider in billing; it is not a license.
Where is William Woo, M.D. located?
The NPPES record lists a practice address at 1188 N Euclid St, Anaheim, CA, 92801. Phone: (888) 988-2800. Providers update this record themselves, so call before visiting.
How can I verify William Woo, M.D.'s license?
NPPES lists California license number A115071, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Woo, M.D. prescribe under Medicare Part D?
In 2024, William Woo, M.D. had 2,837 Medicare Part D claims for 262 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.