JAMES NATHANIEL WEISS MD
NPI 1255352803
Internal Medicine - Cardiovascular Disease in Los Angeles, CA
About James Nathaniel Weiss Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAMES NATHANIEL WEISS MD (NPI 1255352803) is an individual cardiovascular disease provider in Los Angeles, California, licensed in California (G36875) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
James Nathaniel Weiss Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show James Weiss reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 1,766 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90095 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
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 James Weiss's NPI number?
The NPI number for James Weiss is 1255352803. It was assigned to this individual provider in the NPPES registry on July 21, 2006.
Where is James Weiss located?
James Weiss practices at 200 Medical Plaza #365,530,420,120, Los Angeles, CA 90095. The listed phone number is (310) 825-8811.
What is James Weiss's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is James Weiss enrolled in Medicare?
Yes. James Weiss is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for James Weiss's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Weiss reassigns Medicare benefits to The Regents Of The University Of California (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 James Weiss'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 James Weiss was last updated on July 23, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# James Nathaniel Weiss, MD · NPI 1255352803
Cardiovascular Disease physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since July 21, 2006.
## Identity
- **NPI:** 1255352803 (Entity type: Individual)
- **Enumerated:** July 21, 2006
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** G36875 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 MEDICAL PLAZA, #365,530,420,120, Los Angeles, CA 90095-3075
- **Phone:** (310) 825-8811
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** The Regents Of The University Of California (NPI 1235107566, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 23, 2010
- **Other identifiers:** Medicare PIN WG36875B (CA); Medicare UPIN A91828 (CA); Medicaid 00G368750 (CA); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1255352803) · Data from the CMS NPPES public registry.