Joy Liu
NPI 1669008629 · Internal Medicine Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joy Liu is a Internal Medicine Physician provider in Oakland, CA (NPI 1669008629).
Provider details
- NPI number
- 1669008629
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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.
Practice location
Mailing address
Additional practice locations (2)
- 275 W Macarthur BlvdOakland, CA 94611-5641Phone: (510) 752-1000
- 1 Gustave L Levy Pl # 1070New York, NY 10029-6504Phone: (212) 241-6500
Registry dates
- Enumerated
- 2020-03-20
- Last updated
- 2025-08-01
- Certified
- 2025-08-01
Frequently asked questions
- What is Joy Liu's NPI number?
- Joy Liu's National Provider Identifier (NPI) is 1669008629, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joy Liu's specialty?
- Joy Liu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joy Liu located?
- Joy Liu's practice location on file with NPPES is 1411 E 31st St, Oakland, CA 94602-1018.
- What is Joy Liu's phone number?
- The practice phone number listed in the NPPES registry for Joy Liu is (507) 437-4564.
- Does Joy Liu accept Medicare?
- Joy Liu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joy Liu's NPI active?
- Yes — Joy Liu's NPI (1669008629) is active in the NPPES registry as of the last update on 2025-08-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.