Anita Chang, MD
Internal Medicine Physician · Oakland, CA
Anita Chang, MD is an internal medicine physician with a practice address in Oakland, California, and NPI 1013233535, issued on Apr 8, 2010. Check the license (California A125147, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Anita Chang
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A125147 CA
Self-reported in NPPES; status is on the state search - Practice location
- 818 Webster St, Oakland, CA 94607
- Phone
- (510) 986-6800
- Enumerated
- Apr 8, 2010
- Record last updated
- Oct 10, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20131125001137); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 818 Webster St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christine Araneta, PAPhysician Assistant1780747238
- Gilbert Nolly ArcillaBehavior Technician1164046082
- Ivy CaiRegistered Nurse1982458915
- Yan CaiLicensed Vocational Nurse1477195717
- Clayton Chan, MDInternal Medicine Physician1972682037
- Florence ChanRegistered Nurse1649827593
Verify Anita Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A125147Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,942 Medicare Part D claims for 307 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 16 claims were for opioids.
Most prescribed
- Atorvastatin Calcium286 claims
- Amlodipine Besylate243 claims
- Metformin Hcl200 claims
- Losartan Potassium169 claims
- Famotidine115 claims
- Fluticasone Propionate73 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: $26.98
1 payment: food and beverage; the largest payer was Hologic Sales and Service, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Bills Medicare through one group practice
- Asian Health ServicesOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Anita Chang among 17,696 internal medicine physician records in California
Anita Chang, MD 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2010 · median 2004 among the 11,065 with a school on file
- Record last updated2013 · 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).
432 internal medicine physician records list a practice address in Oakland
They are 432 of the 18,558 NPPES records with a practice address in Oakland, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oakland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Marilyn Ancel, MDOakland, CA 946071295813087
- Clayton Chan, MDOakland, CA 946071972682037
- Stewart Fong, MDOakland, CA 946071659459436
- Xiaoguang Huang, M.D., PHD.Oakland, CA 946071235179870
- Susan Mei Huang, MDOakland, CA 946071093894032
- Dennis Ing, MDOakland, CA 946071477631257
- Anthony Iton, M.D.Oakland, CA 946071609961101
- Nicola Longmuir, MDOakland, CA 946071710065511
Common questions
What is Anita Chang, MD's NPI number?
Anita Chang, MD's National Provider Identifier (NPI) is 1013233535, issued on Apr 8, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Anita Chang, MD located?
The NPPES record lists a practice address at 818 Webster St, Oakland, CA, 94607. Phone: (510) 986-6800. Providers update this record themselves, so call before visiting.
How can I verify Anita Chang, MD's license?
NPPES lists California license number A125147, 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 Anita Chang, MD prescribe under Medicare Part D?
In 2024, Anita Chang, MD had 2,942 Medicare Part D claims for 307 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.