Rosemary De Perez, NP MSN
NPI 1114128386 · Ambulatory Care Registered Nurse · San Francisco, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rosemary De Perez, NP MSN is a Ambulatory Care Registered Nurse provider in San Francisco, CA (NPI 1114128386).
Provider details
- NPI number
- 1114128386
- Entity type
- Individual
- Primary specialty
- Ambulatory Care Registered NurseNursing Service Providers
- Credential
- NP MSN
- Sex
- Female
- Sole proprietor
- No
- License
- RN394241 (CA)
Specialties & taxonomies
Nursing Service Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
671 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Anticoagulant Management of Patient Taking Warfarin93793 | 242 | $11 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 110 | $92 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 91 | $62 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 86 | $62 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 47 | $91 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 35 | $33 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Warfarin Sodium | 256 | 91 |
| Apixabanbrand: Eliquis | 97 | 29 |
| Enoxaparin Sodium | 17 | 13 |
| Warfarin Sodiumbrand: Jantoven | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-29
- Last updated
- 2025-09-11
Frequently asked questions
- What is Rosemary De Perez's NPI number?
- Rosemary De Perez's National Provider Identifier (NPI) is 1114128386, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rosemary De Perez's specialty?
- Rosemary De Perez is listed in the NPPES registry with a primary specialty of Ambulatory Care Registered Nurse (Nursing Service Providers).
- Where is Rosemary De Perez located?
- Rosemary De Perez's practice location on file with NPPES is 995 Potrero Ave Bldg.80 Wd 86, San Francisco, CA 94110.
- What is Rosemary De Perez's phone number?
- The practice phone number listed in the NPPES registry for Rosemary De Perez is (415) 206-8676.
- Does Rosemary De Perez accept Medicare?
- Rosemary De Perez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rosemary De Perez's NPI active?
- Yes — Rosemary De Perez's NPI (1114128386) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.