Grace Chang, M.D.
NPI 1992877625 · Internal Medicine Physician · Irvine, CA
Grace Chang, M.D. is a Internal Medicine Physician provider in Irvine, CA (NPI 1992877625).
Provider details
- NPI number
- 1992877625
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A61499 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Progesterone, Micronizedbrand: Progesterone | 117 | 29 |
| Metformin Hclbrand: Metformin Hcl Er | 105 | 45 |
| Telmisartan | 97 | 31 |
| Levothyroxine Sodium | 92 | 28 |
| Potassium Chloride | 65 | 23 |
| Rosuvastatin Calcium | 62 | 22 |
| Estradiolbrand: Estradiol (twice Weekly) |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$300 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-15
- Last updated
- 2022-04-11
- Certified
- 2022-04-09
Frequently asked questions
- What is Grace Chang's NPI number?
- Grace Chang's National Provider Identifier (NPI) is 1992877625, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grace Chang's specialty?
- Grace Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Grace Chang located?
- Grace Chang's practice location on file with NPPES is 17875 Von Karman Ave Ste 430, Irvine, CA 92614-6212.
- What is Grace Chang's phone number?
- The practice phone number listed in the NPPES registry for Grace Chang is (949) 872-2850.
- Is Grace Chang's NPI active?
- Yes — Grace Chang's NPI (1992877625) is active in the NPPES registry as of the last update on 2022-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.