RUTH PEREZ FNP-C
NPI 1184953127
Nurse Practitioner in Palo Alto, CA
About Ruth Perez Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RUTH PEREZ FNP-C (NPI 1184953127) is an individual nurse practitioner in Palo Alto, California, licensed in California (18856) and active in the NPI registry since December 2009. She is enrolled in Medicare PECOS and maintains a secondary practice location in Hayward.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ruth Perez Fnp-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Ruth Perez reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 clinicians in this Medicare group
Stanford, CA 94305
- Reassigned Medicare billing, California enrollment
- 4,258 clinicians in this Medicare group
Oakland, CA 94609
- Reassigned Medicare billing, California enrollment
- 118 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 94304 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 Ruth Perez's NPI number?
The NPI number for Ruth Perez is 1184953127. It was assigned to this individual provider in the NPPES registry on December 22, 2009. The provider is also known as Ruth Holguin Fnp-C.
Where is Ruth Perez located?
Ruth Perez practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.
What is Ruth Perez's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Ruth Perez enrolled in Medicare?
Yes. Ruth Perez is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Ruth Perez's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ruth Perez reassigns Medicare benefits to 3 organizations: Lpch Medical Group Div Of Lucile (Palo Alto, CA), Stanford Health Care (Stanford, CA) and Ucsf Health Medical Foundation (Oakland, 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 Ruth Perez'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 Ruth Perez was last updated on July 4, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Ruth Perez, FNP-C · NPI 1184953127
Nurse Practitioner physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since December 22, 2009.
## Identity
- **NPI:** 1184953127 (Entity type: Individual)
- **Enumerated:** December 22, 2009
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 18856 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304-1601
- **Phone:** (650) 497-8000
## 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): Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA); Stanford Health Care (NPI 1437292927, Stanford, CA); Ucsf Health Medical Foundation (NPI 1922124866, Oakland, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 4, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1184953127) · Data from the CMS NPPES public registry.