Younhi Woo, PHD
Pharmacist · Walnut Creek, CA
Younhi Woo, PHD is a pharmacist with a practice address in Walnut Creek, California, and NPI 1417571845, issued on Jun 1, 2020. Check the license (California 73400, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Younhi Woo
- Credential
- PHD
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 73400 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2995 Ygnacio Valley RD, Walnut Creek, CA 94598
- Phone
- (925) 256-7230
- Enumerated
- Jun 1, 2020
- Record last updated
- Jun 1, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (925) 256-7214
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 32,533 in California → Look up another NPI →
Also registered at 2995 Ygnacio Valley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Janeen Frost, LVNLicensed Vocational Nurse1821783002
- Mirette GhobrialPharmacist1427797950
- Casey Tran, PHARMDPharmacist1659863827
Verify Younhi Woo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 73400Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 93% of the cost of the top drugs
94 Medicare Part D claims for 78 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Arexvy30 claims
- Shingrix25 claims
- Boostrix Tdap17 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.
Younhi Woo among 32,533 pharmacist records in California
Younhi Woo, PHD is one of 32,533 pharmacist records with a practice address in California. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 73% of them.
- NPI issued2020 · 73% of these records are older, 21% newer
- In a Medicare fileYes · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2020 · 76% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 183500000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
239 pharmacist records list a practice address in Walnut Creek
They are 239 of the 6,170 NPPES records with a practice address in Walnut Creek, and 32,533 pharmacist records in California.
All 32,533 in California → Every provider in Walnut Creek → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- Francisco Chong, PHARMDWalnut Creek, CA 945981427097278
- Alireza Hadjighafouri, RPHWalnut Creek, CA 945981922201060
- Munira Hirani, RPHWalnut Creek, CA 945981134219694
- Donna Hori, PHARMD.Walnut Creek, CA 945981053504100
- Alison Knight, PHARM D, RPHWalnut Creek, CA 945981750591673
- Vincent Li, PHARM.D.Walnut Creek, CA 945981609009430
- Sonali Mehta, PHARM.D.Walnut Creek, CA 945981356403307
- Fatemeh Miraliakbar, PHARMDWalnut Creek, CA 945981356503957
Common questions
What is Younhi Woo, PHD's NPI number?
Younhi Woo, PHD's National Provider Identifier (NPI) is 1417571845, issued on Jun 1, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Younhi Woo, PHD located?
The NPPES record lists a practice address at 2995 Ygnacio Valley RD, Walnut Creek, CA, 94598. Phone: (925) 256-7230. Providers update this record themselves, so call before visiting.
How can I verify Younhi Woo, PHD's license?
NPPES lists California license number 73400, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Younhi Woo, PHD prescribe under Medicare Part D?
In 2024, Younhi Woo, PHD had 94 Medicare Part D claims for 78 beneficiaries; the average among pharmacist prescribers was 119. 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.