Grace Chun, MD
NPI 1639243959 · Internal Medicine Physician · Rancho Cordova, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grace Chun, MD is a Internal Medicine Physician provider in Rancho Cordova, CA (NPI 1639243959).
Provider details
- NPI number
- 1639243959
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A64887 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 93 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 450 | 144 |
| Amlodipine Besylate | 263 | 79 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 228 | 36 |
| Losartan Potassium | 224 | 70 |
| Hydrochlorothiazide | 223 | 72 |
| Levothyroxine Sodium | 216 | 63 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-20
- Last updated
- 2021-12-22
Frequently asked questions
- What is Grace Chun's NPI number?
- Grace Chun's National Provider Identifier (NPI) is 1639243959, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grace Chun's specialty?
- Grace Chun is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Grace Chun located?
- Grace Chun's practice location on file with NPPES is 10725 International Dr, Rancho Cordova, CA 95670-7967.
- What is Grace Chun's phone number?
- The practice phone number listed in the NPPES registry for Grace Chun is (916) 631-3000.
- Does Grace Chun accept Medicare?
- Grace Chun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grace Chun's NPI active?
- Yes — Grace Chun's NPI (1639243959) is active in the NPPES registry as of the last update on 2021-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.