HARTLEY COHEN M.D.
NPI 1104826213
Internal Medicine - Gastroenterology in Los Angeles, CA
About Hartley Cohen M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HARTLEY COHEN M.D. (NPI 1104826213) is an individual gastroenterology provider in Los Angeles, California, licensed in California (A31532) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS, maintains a secondary practice location in Los Angeles, and is a graduate of Other (1976).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Hartley Cohen M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Hartley Cohen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
- 1,281 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90017 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Hartley Cohen's NPI number?
The NPI number for Hartley Cohen is 1104826213. It was assigned to this individual provider in the NPPES registry on July 29, 2005.
Where is Hartley Cohen located?
Hartley Cohen practices at 637 Lucas Ave Ste 101, Los Angeles, CA 90017. The listed phone number is (213) 977-1010.
What is Hartley Cohen's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Hartley Cohen enrolled in Medicare?
Yes. Hartley Cohen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Hartley Cohen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hartley Cohen reassigns Medicare benefits to Children's Hospital Los Angeles Medical Group, Inc. (Los Angeles, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Hartley Cohen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Hartley Cohen was last updated on July 9, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Hartley Cohen, M.D. · NPI 1104826213
Gastroenterology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since July 29, 2005.
## Identity
- **NPI:** 1104826213 (Entity type: Individual)
- **Enumerated:** July 29, 2005
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** A31532 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 637 LUCAS AVE STE 101, Los Angeles, CA 90017-1997
- **Phone:** (213) 977-1010
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Children's Hospital Los Angeles Medical Group, Inc. (NPI 1265530653, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1976
## Record status
- **NPPES last updated:** July 9, 2020
- **Other identifiers:** Other CB209349 (CA); Medicaid 00A315320 (CA); Other 00A315320 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1104826213) · Data from the CMS NPPES public registry.