Grace H. Chang, M.D.
Internal Medicine Physician · Irvine, CA
Grace H. Chang, M.D. is an internal medicine physician with a practice address in Irvine, California, and NPI 1992877625, issued on Nov 15, 2006. Check the license (California A61499, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Grace H. Chang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A61499 CA
Self-reported in NPPES; status is on the state search - Practice location
- 17875 Von Karman Ave Ste 430, Irvine, CA 92614
- Phone
- (949) 872-2850
- Enumerated
- Nov 15, 2006
- Record last updated
- Apr 11, 2022
- Fax
- (949) 872-2855
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 17875 Von Karman Ave Ste 430
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jannet Huang, MDEndocrinology, Diabetes & Metabolism Physician1497796049
Verify Grace H. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A61499Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,574 Medicare Part D claims for 157 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 15 claims were for opioids.
Most prescribed
- Progesterone117 claims
- Metformin Hcl Er105 claims
- Telmisartan97 claims
- Levothyroxine Sodium92 claims
- Potassium Chloride65 claims
- Rosuvastatin Calcium62 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: $300.45
2 payments; by number, the most common kind was food and beverage; the largest payer was Inari Medical, 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.
Grace H. Chang among 17,696 internal medicine physician records in California
Grace H. 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 fileNo · 63% of these records are
- Record last updated2022 · 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).
155 internal medicine physician records list a practice address in Irvine
They are 155 of the 7,778 NPPES records with a practice address in Irvine, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Irvine → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Jeffrey Sudeith, M.D.Irvine, CA 926141649297383
- James Wang, M.D.Irvine, CA 926141639413123
- Susan Davoodifar, M.D.Irvine, CA 926121013287119
- Pamela Lawrence, M.D.Irvine, CA 926121336299734
- Marta Long, MDIrvine, CA 926121205860509
Common questions
What is Grace H. Chang, M.D.'s NPI number?
Grace H. Chang, M.D.'s National Provider Identifier (NPI) is 1992877625, issued on Nov 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Grace H. Chang, M.D. located?
The NPPES record lists a practice address at 17875 Von Karman Ave Ste 430, Irvine, CA, 92614. Phone: (949) 872-2850. Providers update this record themselves, so call before visiting.
How can I verify Grace H. Chang, M.D.'s license?
NPPES lists California license number A61499, 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 Grace H. Chang, M.D. prescribe under Medicare Part D?
In 2024, Grace H. Chang, M.D. had 1,574 Medicare Part D claims for 157 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.