Woody Chang
Geriatric Medicine (Internal Medicine) Physician · Sunnyvale, CA
Woody Chang is a geriatric medicine (internal medicine) physician with a practice address in Sunnyvale, California, and NPI 1295153187, issued on Mar 29, 2014. Check the license (California A152122, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Woody Chang
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- A152122 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 Old San Francisco RD, Sunnyvale, CA 94086
- Phone
- (408) 730-6250
- Enumerated
- Mar 29, 2014
- Record last updated
- Dec 10, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180926003031); accepts Medicare assignment
- Medical or professional school
- Stanford University School Of Medicine, 2014
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →
Also registered at 301 Old San Francisco RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Wafa Aljuneidi, MSN, APRN-NP, FNP-CNurse Practitioner1083583991
- Aisha AminInternal Medicine Physician1013440981
- Joyce Ang, MDPediatrics Physician1346634698
- Lulua Bahrainwala, MD, MSFamily Medicine Physician1568949709
Verify Woody Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A152122Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
1,402 Medicare Part D claims for 63 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. 31 claims were for opioids.
Most prescribed
- Furosemide107 claims
- Eliquis86 claims
- Atorvastatin Calcium52 claims
- Gabapentin46 claims
- Tamsulosin Hcl45 claims
- Escitalopram Oxalate40 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
- Sutter Bay Medical FoundationSunnyvale, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Woody Chang among 532 geriatric medicine (internal medicine) physician records in California
Woody Chang is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 80% of them.
- NPI issued2014 · 80% of these records are older, 18% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2014 · median 1999 among the 271 with a school on file
- Record last updated2018 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in California
There are 532 geriatric medicine (internal medicine) physician records in California.
All 532 in California → Every provider in Sunnyvale → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Sangeeta Kopardekar, MDSunnyvale, CA 940861568561157
- Haini Liao, M.D.Sunnyvale, CA 940861235490988
- Pooja MathewSunnyvale, CA 940861811579279
- Jessica Phan, MDSunnyvale, CA 940861902484280
- Megha Pokhriyal, DOSunnyvale, CA 940851639708670
- Silbey Mui, MDSouth San Francisco, CA 940801346390143
- Maung Tin, MDSouth San Francisco, CA 940801003015215
- Qingping Wang, M.D., PH.D.South San Francisco, CA 940801104818590
Common questions
What is Woody Chang's NPI number?
Woody Chang's National Provider Identifier (NPI) is 1295153187, issued on Mar 29, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Woody Chang located?
The NPPES record lists a practice address at 301 Old San Francisco RD, Sunnyvale, CA, 94086. Phone: (408) 730-6250. Providers update this record themselves, so call before visiting.
How can I verify Woody Chang's license?
NPPES lists California license number A152122, 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 Woody Chang prescribe under Medicare Part D?
In 2024, Woody Chang had 1,402 Medicare Part D claims for 63 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.