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James C.S. Hahn, M.D.

  • Single-specialty group
  • Los Angeles, CA
  • Core specialty: Primary care
NPI1023893435PAC ID8628415197Dmand IDNG-MGR-099637
Total HCPs
2
Physicians (MD/DO)
2
Medicare Part B payments
$7,144
Address
1245 Wilshire Blvd Ste 790, Los Angeles, CA 90017-4881
Main phone
(323) 735-1111
Specialty areas
Primary care
Website and social

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James C.S. Hahn, M.D. is a primary care medical group in Los Angeles, California

James C.S. Hahn, M.D. is enrolled in Medicare as a group practice under PAC ID 8628415197.

Sources: NPPES NPI Registry (CMS); Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Affiliation Data

James C.S. Hahn, M.D.'s NPI is 1023893435 and its PAC ID is 8628415197

Identifiers
Primary NPI (Type 2)
1023893435NPI Registry (opens in a new tab)
Medicare PAC ID
8628415197
Dmand ID
NG-MGR-099637
Medicare enrollment
Enrolled (PAC ID on file)
Contact
Address
1245 Wilshire Blvd Ste 790, Los Angeles, CA 90017-4881
Main phone
(323) 735-1111
Executive emails and mobiles
Get contacts
Classification
Group type
Single-specialty
Core specialty
Primary care
Site structure
Single-site
Ownership model
Clinician owned
Leadership
Physician-led
Medicare Part B payments
$7,144
Legal name
James Cs Hahn, Md Inc

Sources: NPPES NPI Registry (CMS); Doctors and Clinicians National Downloadable File (CMS); Dmand AI Org Hierarchy Data; Dmand AI Organization Profile Data; and Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data

James C.S. Hahn, M.D. has 2 physicians among 2 HCPs

James C.S. Hahn, M.D. physicians by specialty

  1. Internal medicine2

Share of the group's 2 physicians.

James C.S. Hahn, M.D. physicians

Dr. James C.s. Hahn, MDInternist, Los Angeles, CADr. Ja-Yoon Uni Choe, MDInternist, West Hills, CA
View all 2 HCPs

Sources: NPPES NPI Registry (CMS); Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Affiliation Data

James C.S. Hahn, M.D. practices at one location in Los Angeles

James C.S. Hahn, M.D. practice locations

James C.S. Hahn, M.D. , Inc.Hospital · Los Angeles, CA

Sources: Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data

Full footprint

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James C.S. Hahn, M.D. is a primary care group

Primary care is James C.S. Hahn, M.D.'s core specialty, with internal medicine as its main practice type.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Affiliation Data

Dmand AI tracks the EHR at James C.S. Hahn, M.D.

Vendor and product names for the practice are available with a free account.

EHR systems at James C.S. Hahn, M.D.
SiteEHR vendorProduct
PracticeAvailable with a free accountAvailable with a free account

Source: Dmand AI Technology Install Data

Primary care groups in California similar in size to James C.S. Hahn, M.D.

These primary care groups have the closest number of HCPs to James C.S. Hahn, M.D.

Similar medical groups by number of HCPs
Medical groupHCPs
Above Urgent CareMontclair, CA5
Advanced Cardiovascular InstituteCastro Valley, CA5
Advanced Surgical SolutionsEncino, CA5
Advance Health Medical GroupBurbank, CA5
Advance Nursing Practice Medical Group IncModesto, CA5
See all 3,969 primary care groups in California

Sources: Dmand AI Affiliation Data; and Dmand AI Peer Benchmarks

Sources for James C.S. Hahn, M.D. data

Sources for the data on this page
Data on this pageSource
NPI, PAC ID and addressNPPES NPI Registry (CMS) (opens in a new tab)Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Dmand ID, phone, website, LinkedIn and group profileDmand AI Org Hierarchy DataDmand AI Organization Profile Data
Medicare Part B paymentsMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
HCPs and physician specialtiesNPPES NPI Registry (CMS) (opens in a new tab)Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Affiliation Data
Specialty areasDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Affiliation Data
Practice locations and hospitalsDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data
Similar groupsDmand AI Affiliation DataDmand AI Peer Benchmarks
EHR vendorsDmand AI Technology Install Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about James C.S. Hahn, M.D.

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is James C.S. Hahn, M.D.'s NPI number?

James C.S. Hahn, M.D.'s primary NPI (Type 2) is 1023893435.

What is James C.S. Hahn, M.D.'s PAC ID?

James C.S. Hahn, M.D.'s Medicare PAC ID is 8628415197, which means the group is enrolled in Medicare.

Where is James C.S. Hahn, M.D. located?

James C.S. Hahn, M.D. is at 1245 Wilshire Blvd Ste 790, Los Angeles, CA 90017-4881.

What is James C.S. Hahn, M.D.'s phone number?

James C.S. Hahn, M.D.'s main phone number is (323) 735-1111.

How many physicians does James C.S. Hahn, M.D. have?

Dmand AI links 2 physicians and 2 HCPs in all to James C.S. Hahn, M.D.

What specialties does James C.S. Hahn, M.D. cover?

James C.S. Hahn, M.D. is a primary care group. The largest physician specialties are internal medicine (2).

How much does James C.S. Hahn, M.D. receive from Medicare?

CMS data shows $7,144 in Medicare Part B payments to James C.S. Hahn, M.D.

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