Andrea Chang, DO
NPI 1689065468 · Internal Medicine Physician · Mercer Island, WA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrea Chang, DO is a Internal Medicine Physician provider in Mercer Island, WA (NPI 1689065468).
Provider details
- NPI number
- 1689065468
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- OP61199690 (WA)
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
11 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 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 53 | 28 |
| Lisinopril | 46 | 20 |
| Amlodipine Besylate | 41 | 20 |
| Levothyroxine Sodium | 40 | 19 |
| Losartan Potassium | 37 | 17 |
| Hydrochlorothiazide | 31 | 14 |
| Gabapentin | 29 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-02-14
- Last updated
- 2022-02-25
- Certified
- 2022-02-25
Frequently asked questions
- What is Andrea Chang's NPI number?
- Andrea Chang's National Provider Identifier (NPI) is 1689065468, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrea Chang's specialty?
- Andrea Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Andrea Chang located?
- Andrea Chang's practice location on file with NPPES is 3236 78th Ave Se Ste 200, Mercer Island, WA 98040-3500.
- What is Andrea Chang's phone number?
- The practice phone number listed in the NPPES registry for Andrea Chang is (206) 386-9500.
- Does Andrea Chang accept Medicare?
- Andrea Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrea Chang's NPI active?
- Yes — Andrea Chang's NPI (1689065468) is active in the NPPES registry as of the last update on 2022-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.