Kester Wu, DO
Internal Medicine Physician · Baldwin Park, CA
Kester Wu, DO is an internal medicine physician with a practice address in Baldwin Park, California, and NPI 1609253699, issued on Apr 29, 2015. Check the license (California 20A15175, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kester Wu
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A15175 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1011 Baldwin Park Blvd, Baldwin Park, CA 91706
- Phone
- (626) 851-1011
- Enumerated
- Apr 29, 2015
- Record last updated
- Dec 9, 2022
- Medicare enrollment
- Enrolled (PECOS I20190309000005); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1011 Baldwin Park Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sarah Abdulla, M.D.Surgery Physician1699200840
- Julia Aburto-Erazo, NPNurse Practitioner1922175777
- Mauricio Acevedo, MDInternal Medicine Physician1659442614
- Helen Achio, PHARM.D.Pharmacist1225114614
- Olufemi Adenuga, M.D, MPHPulmonary Disease Physician1134389125
- Soma Agarwal, MDOphthalmology Physician1437220316
Verify Kester Wu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A15175Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% more Medicare Part D claims than the average internal medicine physician in 2024
3,350 Medicare Part D claims for 819 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 86 claims were for opioids.
Most prescribed
- Atorvastatin Calcium270 claims
- Lisinopril141 claims
- Amlodipine Besylate136 claims
- Losartan Potassium121 claims
- Metformin Hcl102 claims
- Omeprazole97 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 GroupBaldwin Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kester Wu among 17,696 internal medicine physician records in California
Kester Wu, DO is one of 17,696 internal medicine physician 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 2015, is newer than 76% of them.
- NPI issued2015 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2018 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
56 internal medicine physician records list a practice address in Baldwin Park
They are 56 of the 1,055 NPPES records with a practice address in Baldwin Park, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Baldwin Park → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- John Bigley, MDBaldwin Park, CA 917061447321328
- Jyh Chang, M.D.Baldwin Park, CA 917061346259595
- Victoria Chen, M.D.Baldwin Park, CA 917061760423016
- Robert Clements, MDBaldwin Park, CA 917061326119207
- Daisy Lynn Galario, M.D.Baldwin Park, CA 917061235174129
- Carolyn Hardy, MDBaldwin Park, CA 917061043381973
- Susan Hua, MDBaldwin Park, CA 917061235200213
- Sandra Koyama, MDBaldwin Park, CA 917061548331507
Common questions
What is Kester Wu, DO's NPI number?
Kester Wu, DO's National Provider Identifier (NPI) is 1609253699, issued on Apr 29, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Kester Wu, DO located?
The NPPES record lists a practice address at 1011 Baldwin Park Blvd, Baldwin Park, CA, 91706. Phone: (626) 851-1011. Providers update this record themselves, so call before visiting.
How can I verify Kester Wu, DO's license?
NPPES lists California license number 20A15175, 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 Kester Wu, DO prescribe under Medicare Part D?
In 2024, Kester Wu, DO had 3,350 Medicare Part D claims for 819 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.