James Chen, DO
NPI 1891870119 · Allergy & Immunology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Chen, DO is a Allergy & Immunology Physician provider in San Francisco, CA (NPI 1891870119).
Provider details
- NPI number
- 1891870119
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 20A8279 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone Propionate | 41 | 15 |
| Tiotropium Bromidebrand: Spiriva Respimat | 29 | 13 |
| Fluticasone Propion/Salmeterolbrand: Wixela Inhub | 29 | 13 |
| Ciclesonidebrand: Alvesco | 22 | — |
| Budesonide/Formoterol Fumaratebrand: Breyna | 22 | — |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 20 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$59 across 2 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
- 2006-10-26
- Last updated
- 2021-12-08
Frequently asked questions
- What is James Chen's NPI number?
- James Chen's National Provider Identifier (NPI) is 1891870119, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Chen's specialty?
- James Chen is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is James Chen located?
- James Chen's practice location on file with NPPES is 6850 Geary Blvd, San Francisco, CA 94121-1604.
- What is James Chen's phone number?
- The practice phone number listed in the NPPES registry for James Chen is (415) 751-6800.
- Does James Chen accept Medicare?
- James Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Chen's NPI active?
- Yes — James Chen's NPI (1891870119) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.