Pei-Chi Wu, D.O.
Family Medicine Physician · Diamond Bar, CA
Pei-Chi Wu, D.O. is a family medicine physician with a practice address in Diamond Bar, California, and NPI 1669706453, issued on Sep 25, 2009. Check the license (California 20A10934, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Pei-Chi Wu
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A10934 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2020 S Brea Canyon RD Ste A1, Diamond Bar, CA 91765
- Phone
- (909) 861-6853
- Enumerated
- Sep 25, 2009
- Record last updated
- Feb 23, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (909) 963-1796
- Medicare enrollment
- Enrolled (PECOS I20111219000126); accepts Medicare assignment
- Medical or professional school
- Western University Of Health Sciences College Of Dental Med, 2008
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 2020 S Brea Canyon RD Ste A1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michelle Mo, FNP-BCFamily Medicine Physician1083431530
Verify Pei-Chi Wu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A10934Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% more Medicare Part D claims than the average family medicine physician in 2024
4,310 Medicare Part D claims for 331 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 24 claims were for opioids.
Most prescribed
- Atorvastatin Calcium369 claims
- Losartan Potassium252 claims
- Amlodipine Besylate240 claims
- Levothyroxine Sodium192 claims
- Rosuvastatin Calcium192 claims
- Metformin Hcl149 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.
Industry payments in 2024: $357.23
9 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Pei-Chi Wu among 17,133 family medicine physician records in California
Pei-Chi Wu, D.O. 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 2009, is newer than 58% of them.
- NPI issued2009 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2008 · median 2005 among the 10,652 with a school on file
- Record last updated2015 · 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).
25 family medicine physician records list a practice address in Diamond Bar
They are 25 of the 598 NPPES records with a practice address in Diamond Bar, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Diamond Bar → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- William FenertyDiamond Bar, CA 917651184625915
- John Fonmin, MDDiamond Bar, CA 917651629147319
- David Hsieh, M.D.Diamond Bar, CA 917651891919874
- Lubna Isho, DODiamond Bar, CA 917651851350797
- Brian Koffman, MDDiamond Bar, CA 917651326049164
- Yann Ping Pan, MDDiamond Bar, CA 917651114250925
- David Rhodes, MDDiamond Bar, CA 917651518968353
- Yvonne Rodriguez Lawson, MDDiamond Bar, CA 917651912967233
Common questions
What is Pei-Chi Wu, D.O.'s NPI number?
Pei-Chi Wu, D.O.'s National Provider Identifier (NPI) is 1669706453, issued on Sep 25, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Pei-Chi Wu, D.O. located?
The NPPES record lists a practice address at 2020 S Brea Canyon RD Ste A1, Diamond Bar, CA, 91765. Phone: (909) 861-6853. Providers update this record themselves, so call before visiting.
How can I verify Pei-Chi Wu, D.O.'s license?
NPPES lists California license number 20A10934, 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 Pei-Chi Wu, D.O. prescribe under Medicare Part D?
In 2024, Pei-Chi Wu, D.O. had 4,310 Medicare Part D claims for 331 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.