Andrea Chai, MD
NPI 1285175448 · Internal Medicine Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrea Chai, MD is a Internal Medicine Physician provider in Oakland, CA (NPI 1285175448).
Provider details
- NPI number
- 1285175448
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A158966 (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
9 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 · 65 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 274 | 118 |
| Amlodipine Besylate | 149 | 63 |
| Lisinopril | 96 | 39 |
| Gabapentin | 94 | 38 |
| Levothyroxine Sodium | 92 | 40 |
| Losartan Potassium | 87 | 44 |
| Alendronate Sodium | 77 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-03-20
- Last updated
- 2022-09-01
- Certified
- 2022-09-01
Frequently asked questions
- What is Andrea Chai's NPI number?
- Andrea Chai's National Provider Identifier (NPI) is 1285175448, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrea Chai's specialty?
- Andrea Chai is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Andrea Chai located?
- Andrea Chai's practice location on file with NPPES is 275 W Macarthur Blvd, Oakland, CA 94611-5641.
- What is Andrea Chai's phone number?
- The practice phone number listed in the NPPES registry for Andrea Chai is (510) 752-6126.
- Does Andrea Chai accept Medicare?
- Andrea Chai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrea Chai's NPI active?
- Yes — Andrea Chai's NPI (1285175448) is active in the NPPES registry as of the last update on 2022-09-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.