ROBERT SEAN WARNOCK ARNP
NPI 1184757791
Nurse Practitioner - Family in Los Angeles, CA
About Robert Sean Warnock Arnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROBERT SEAN WARNOCK ARNP (NPI 1184757791) is an individual family provider in Los Angeles, California, licensed in California (11779) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 8
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Robert Sean Warnock Arnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Robert Warnock reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90007
- Reassigned Medicare billing, California enrollment
- 26 clinicians in this Medicare group
Los Angeles, CA 90007
- Reassigned Medicare billing, California enrollment
- 29 clinicians in this Medicare group
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 78 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 90007 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.
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 Robert Warnock's NPI number?
The NPI number for Robert Warnock is 1184757791. It was assigned to this individual provider in the NPPES registry on March 13, 2007.
Where is Robert Warnock located?
Robert Warnock practices at 403 W Adams Blvd, Los Angeles, CA 90007. The listed phone number is (213) 741-8330.
What is Robert Warnock's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Robert Warnock enrolled in Medicare?
Yes. Robert Warnock is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Robert Warnock's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Warnock reassigns Medicare benefits to 3 organizations: Orthopaedic Hospital (Los Angeles, CA), Orthopaedic Hospital Medical Group Inc (Los Angeles, CA) and Regents Of The University Of California (Los Angeles, CA). Each 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 Robert Warnock'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 Robert Warnock was last updated on May 22, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Robert Sean Warnock, ARNP · NPI 1184757791
Family physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since March 13, 2007.
## Identity
- **NPI:** 1184757791 (Entity type: Individual)
- **Enumerated:** March 13, 2007
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 11779 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 403 W ADAMS BLVD, Los Angeles, CA 90007-2664
- **Phone:** (213) 741-8330 · **Fax:** (213) 741-8388
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Orthopaedic Hospital (NPI 1689632374, Los Angeles, CA); Orthopaedic Hospital Medical Group Inc (NPI 1942300918, Los Angeles, CA); Regents Of The University Of California (NPI 1528179793, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 22, 2015
- **Other identifiers:** Medicare UPIN P72839; Other 1184757791; Medicare OSCAR/certification E8444W (FL); and 5 more
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Source: [NPI Profile](https://npiprofile.com/npi/1184757791) · Data from the CMS NPPES public registry.