Anna R. Chang, M.D.
Internal Medicine Physician · Concord, CA
Anna R. Chang, M.D. is an internal medicine physician with a practice address in Concord, California, and NPI 1568402931, issued on Jun 7, 2006. Check the license (California A69618, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Anna R. Chang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A69618 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2700 Grant St, Concord, CA 94520
- Phone
- (925) 687-8860
- Enumerated
- Jun 7, 2006
- Record last updated
- Jun 18, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (925) 687-1570
- Medicaid ID
- 00A696180 CA
- Medicare enrollment
- Enrolled (PECOS I20041019000322); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2700 Grant St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jason AdajarPhysical Therapist1689187825
- Johnson Adeyanju, M.D.Internal Medicine Physician1467403147
- Susan Adler-Bressler, M.D.Family Medicine Physician1588615207
- Kris Arneson, P.T.Physical Therapist1669596425
- Alicia Bakkum, NPClinical Nurse Specialist1982793220
- Mike Bannout, M.D.Internal Medicine Physician1598784662
Verify Anna R. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A69618Check 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% fewer Medicare Part D claims than the average internal medicine physician in 2024
3,007 Medicare Part D claims for 347 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Levothyroxine Sodium426 claims
- Metformin Hcl239 claims
- Jardiance215 claims
- Ozempic185 claims
- Mounjaro126 claims
- Atorvastatin Calcium109 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 85.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $446.61
16 payments; by number, the most common kind was food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, Inc. 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
- John Muir Physician NetworkConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Anna R. Chang among 17,696 internal medicine physician records in California
Anna R. Chang, M.D. 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1998 · median 2004 among the 11,065 with a school on file
- Record last updated2012 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Concord → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Johnson Adeyanju, M.D.Concord, CA 945201467403147
- Jose Arias-VeraConcord, CA 945201497826283
- Mike Bannout, M.D.Concord, CA 945201598784662
- David Bressler, M.D.Concord, CA 945201962456210
- Lori Danze, M.D.Concord, CA 945201003923236
- Robert Davidson, M.D.Concord, CA 945201659311108
- Chinnavuth De Monteiro, M.D.Concord, CA 945201558392449
- John Hiss, M.D.Concord, CA 945201386663052
Common questions
What is Anna R. Chang, M.D.'s NPI number?
Anna R. Chang, M.D.'s National Provider Identifier (NPI) is 1568402931, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Anna R. Chang, M.D. located?
The NPPES record lists a practice address at 2700 Grant St, Concord, CA, 94520. Phone: (925) 687-8860. Providers update this record themselves, so call before visiting.
How can I verify Anna R. Chang, M.D.'s license?
NPPES lists California license number A69618, 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 Anna R. Chang, M.D. prescribe under Medicare Part D?
In 2024, Anna R. Chang, M.D. had 3,007 Medicare Part D claims for 347 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Anna R. Chang, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.