James Liang, D.O.
NPI 1780618322 · Family Medicine Physician · Oakland, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Liang, D.O. is a Family Medicine Physician provider in Oakland, CA (NPI 1780618322).
Provider details
- NPI number
- 1780618322
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A7592 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$278 across 11 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
- 2006-07-10
- Last updated
- 2020-09-25
- Certified
- 2020-09-25
Frequently asked questions
- What is James Liang's NPI number?
- James Liang's National Provider Identifier (NPI) is 1780618322, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Liang's specialty?
- James Liang is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Liang located?
- James Liang's practice location on file with NPPES is 1416 35th Ave, Oakland, CA 94601-3511.
- What is James Liang's phone number?
- The practice phone number listed in the NPPES registry for James Liang is (510) 479-1313.
- Does James Liang accept Medicare?
- James Liang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Liang's NPI active?
- Yes — James Liang's NPI (1780618322) is active in the NPPES registry as of the last update on 2020-09-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.