James C.s. Hahn, M.D. , Inc.
NPI 1023893435 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James C.s. Hahn, M.D. , Inc. is a Internal Medicine Physician organization in Los Angeles, CA (NPI 1023893435).
Provider details
- NPI number
- 1023893435
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- James Hahn, MD(213) 810-5050
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
2 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-08-25
- Last updated
- 2023-10-10
- Certified
- 2023-10-10
Frequently asked questions
- What is James C.s. Hahn, M.D. , Inc.'s NPI number?
- James C.s. Hahn, M.D. , Inc.'s National Provider Identifier (NPI) is 1023893435, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is James C.s. Hahn, M.D. , Inc.?
- James C.s. Hahn, M.D. , Inc. is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James C.s. Hahn, M.D. , Inc. located?
- James C.s. Hahn, M.D. , Inc.'s practice location on file with NPPES is 1245 Wilshire Blvd Ste 790, Los Angeles, CA 90017-4881.
- What is James C.s. Hahn, M.D. , Inc.'s phone number?
- The practice phone number listed in the NPPES registry for James C.s. Hahn, M.D. , Inc. is (323) 735-1111.
- Does James C.s. Hahn, M.D. , Inc. accept Medicare?
- James C.s. Hahn, M.D. , Inc. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for James C.s. Hahn, M.D. , Inc.?
- The authorized official listed on James C.s. Hahn, M.D. , Inc.'s NPPES record is James Hahn, MD. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is James C.s. Hahn, M.D. , Inc.'s NPI active?
- Yes — James C.s. Hahn, M.D. , Inc.'s NPI (1023893435) is active in the NPPES registry as of the last update on 2023-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.