Alan T. Chang, M.D.
Internal Medicine Physician · Escondido, CA
Alan T. Chang, M.D. is an internal medicine physician with a practice address in Escondido, California, and NPI 1699784934, issued on Aug 5, 2006. Check the license (California G79904, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alan T. Chang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G79904 CA
Self-reported in NPPES; status is on the state search - Practice location
- 225 East 2ND Avenue, Escondido, CA 92025
- Phone
- (760) 291-6700
- Enumerated
- Aug 5, 2006
- Record last updated
- Dec 12, 2024
- Fax
- (760) 745-1588
- Medicaid ID
- 00A623420 CA
- Medicare enrollment
- Enrolled (PECOS I20100804000976); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Alan T. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G79904Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.4 times the Medicare Part D claims of the average internal medicine physician in 2024
13,850 Medicare Part D claims for 790 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 659 claims were for opioids.
Most prescribed
- Atorvastatin Calcium590 claims
- Amlodipine Besylate578 claims
- Levothyroxine Sodium524 claims
- Rosuvastatin Calcium371 claims
- Eliquis339 claims
- Lisinopril331 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 MIPS final score for 2023 (Medicare payment program): 80.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $816.98
38 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, 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 2 group practices
- Del Sur HealthcareEl Cajon, CA
- Graybill Medical Group IncEscondido, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alan T. Chang among 17,696 internal medicine physician records in California
Alan T. 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
- Graduated1995 · median 2004 among the 11,065 with a school on file
- Record last updated2024 · 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).
44 internal medicine physician records list a practice address in Escondido
They are 44 of the 3,509 NPPES records with a practice address in Escondido, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Escondido → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rachel Bacon, M.DEscondido, CA 920251215963905
- Margaret Chen, M.DEscondido, CA 920251659305084
- Larry Chiang, MDEscandido, CA 920251912952524
- Mark Haberman, M.D.Escondido, CA 920251497780563
- Karin Kordas, M.D.Escondido, CA 920251043236292
- Lara Le, MDEscondido, CA 920251043239841
- Emmet Lee, M.D.Escondido, CA 920251558326801
- Richard Mallo, MDEscondido, CA 920251588699490
Common questions
What is Alan T. Chang, M.D.'s NPI number?
Alan T. Chang, M.D.'s National Provider Identifier (NPI) is 1699784934, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alan T. Chang, M.D. located?
The NPPES record lists a practice address at 225 East 2ND Avenue, Escondido, CA, 92025. Phone: (760) 291-6700. Providers update this record themselves, so call before visiting.
How can I verify Alan T. Chang, M.D.'s license?
NPPES lists California license number G79904, 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 Alan T. Chang, M.D. prescribe under Medicare Part D?
In 2024, Alan T. Chang, M.D. had 13,850 Medicare Part D claims for 790 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Alan T. Chang, M.D.'s MIPS final score?
The 2023 MIPS final score is 80.2 of 100. 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.