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MS. ROSEMARY DE PEREZ NP MSN
NPI 1114128386
Registered Nurse - Ambulatory Care in San Francisco, CA

Active since May 29, 2007PECOS Enrolled
74.46/100
CMS Quality Rating
995 POTRERO AVE BLDG.80 WD 86, SFGH AIDS - PHP CLINIC, SAN FRANCISCO, CA 94110(415) 206-8676(415) 502-4777 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Ms. Rosemary De Perez Np Msn NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MS. ROSEMARY DE PEREZ NP MSN (NPI 1114128386) is an individual ambulatory care provider in San Francisco, California, licensed in California (RN394241) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1114128386
Entity TypeIndividualFemale
Primary Taxonomy163WP2201X
Provider Legal NameMS. ROSEMARY DE PEREZCredential: NP MSN
Location Address995 POTRERO AVE BLDG.80 WD 86, SFGH AIDS - PHP CLINICSan Francisco, CA 94110
Mailing Address995 Potrero Ave Bldg.80 Wd 86, Sfgh Aids - Php ClinicSan Francisco, CA 94110 · (415) 206-8676 · Fax (415) 502-4777
Phone(415) 206-8676
Fax(415) 502-4777
Sole ProprietorNo
Enumeration DateMay 29, 2007
Last NPPES UpdateSeptember 11, 2025
✔ NPI 1114128386 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRegistered Nurse · Ambulatory CareNursing Service Providers
Taxonomy Code163WP2201X
License✔ Licensed in CA · RN394241
Also ListedNurse Practitioner · Adult HealthTaxonomy 363LA2200X · License NPF4709 (CA)
995 POTRERO AVE BLDG.80 WD 86, San Francisco, CA 94110
Open in Google Maps ↗

Other Identifiers 1

Other029470Sfgh Internal Use Only-commercial Number

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Rosemary De Perez Np Msn is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Rosemary De Perez reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Regents Of The University Of California
2.6 mi
Endocrinology, Diabetes & Metabolism
1600 DIVISADERO ST
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 2,112 clinicians in this Medicare group
NPI 1235322348 (415) 353-9720
University Of California San Francisco
2.9 mi
Surgery
400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 5,645 clinicians in this Medicare group
NPI 1346329380 (415) 353-2161

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 10

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.

Anticoagulant management of patient taking warfarin 93793
Anticoagulant management with warfarin involves monitoring and adjusting your medication to prevent blood clots while minimizing the risk of bleeding. Regular blood tests measure your response to warfarin, helping adjust your dose if necessary. It's crucial to maintain a consistent diet and promptly report any changes in your health.
242 services89 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
110 services56 patients
Telephone medical discussion with physician, 11-20 minutes 99442
This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.
91 services56 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
86 services49 patients
Telephone medical discussion with physician, 21-30 minutes 99443
This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.
47 services32 patients
Telephone medical discussion with physician, 5-10 minutes 99441
A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.
35 services27 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

74.46/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability76
Improvement Activities40
Cost46.68

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MITCHELL H. KATZ MD
Internal Medicine
995 POTRERO AVE BLDG.80 WD 86, SFGH AIDS - PHP CLINIC
SAN FRANCISCO, CA 94110
San Francisco County (415) 206-2400

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 Rosemary De Perez's NPI number?

The NPI number for Rosemary De Perez is 1114128386. It was assigned to this individual provider in the NPPES registry on May 29, 2007.

Where is Rosemary De Perez located?

Rosemary De Perez practices at 995 Potrero Ave Bldg.80 Wd 86 Sfgh Aids - Php Clinic, San Francisco, CA 94110. The listed phone number is (415) 206-8676.

What is Rosemary De Perez's specialty?

The primary specialty registered for this NPI is Registered Nurse, specializing in Ambulatory Care, with taxonomy code 163WP2201X.

Is Rosemary De Perez enrolled in Medicare?

Yes. Rosemary De Perez is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Rosemary De Perez's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Rosemary De Perez reassigns Medicare benefits to 2 organizations: Regents Of The University Of California (San Francisco, CA) and University Of California San Francisco (San Francisco, 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 Rosemary De 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 Rosemary De Perez was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.