Rosemary De Perez, NP MSN
Ambulatory Care Registered Nurse · San Francisco, CA
Rosemary De Perez, NP MSN is an ambulatory care registered nurse with a practice address in San Francisco, California, and NPI 1114128386, issued on May 29, 2007. Check the license (California RN394241, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Rosemary De Perez
- Credential
- NP MSN
- Primary taxonomy
- Ambulatory Care Registered Nurse 163WP2201X
- License numbers
- RN394241 CA
NPF4709 CA
Self-reported in NPPES; status is on the state search - Practice location
- 995 Potrero Ave Bldg.80 WD 86, San Francisco, CA 94110
- Phone
- (415) 206-8676
- Enumerated
- May 29, 2007
- Record last updated
- Sep 11, 2025
- Fax
- (415) 502-4777
- Entity
- Type 1 · individual
8 nearest ambulatory care registered nurse records → All 940 in California → Look up another NPI →
Also registered at 995 Potrero Ave Bldg.80 WD 86
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mitchell Katz, MDInternal Medicine Physician1205959533
Verify Rosemary De Perez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license RN394241Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average ambulatory care registered nurse in 2024
387 Medicare Part D claims for 127 beneficiaries, against an average of 469 among the 26 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Warfarin Sodium256 claims
- Eliquis97 claims
- Enoxaparin Sodium17 claims
- Jantoven11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 74.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Rosemary De Perez among 940 ambulatory care registered nurse records in California
Rosemary De Perez, NP MSN is one of 940 ambulatory care registered nurse records with a practice address in California. 2% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than under 1% of them.
- NPI issued2007 · under 1% of these records are older, 97% newer
- In a Medicare fileYes · 2% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2025 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 163WP2201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ambulatory Care Registered Nurse providers in California
There are 940 ambulatory care registered nurse records in California.
All 940 in California → Every provider in San Francisco → Ambulatory Care Registered Nurse nationwide →
The 8 ambulatory care registered nurse records with the nearest ZIP codes
- Karen Duderstadt, NPSan Francisco, CA 941101144347519
- Irene Friedman, RNSan Francisco, CA 941101720735871
- Marian Kerbleski, RNSan Francisco, CA 941101104176841
- Susan Koehler, NP MSNSan Francisco, CA 941101700918737
- Terrence Marcotte, NP MSNSan Francisco, CA 941101952428328
- Andrea Raider, NPSan Francisco, CA 941101013136332
- Sally Thresher, NP MSNSan Francisco, CA 941101568585883
- Christina Crotwell, R/NSan Francisco, CA 941151841542602
Common questions
What is Rosemary De Perez, NP MSN's NPI number?
Rosemary De Perez, NP MSN's National Provider Identifier (NPI) is 1114128386, issued on May 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Rosemary De Perez, NP MSN located?
The NPPES record lists a practice address at 995 Potrero Ave Bldg.80 WD 86, San Francisco, CA, 94110. Phone: (415) 206-8676. Providers update this record themselves, so call before visiting.
How can I verify Rosemary De Perez, NP MSN's license?
NPPES lists California license number RN394241, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Rosemary De Perez, NP MSN prescribe under Medicare Part D?
In 2024, Rosemary De Perez, NP MSN had 387 Medicare Part D claims for 127 beneficiaries; the average among ambulatory care registered nurse prescribers was 469. Part D covers Medicare prescriptions only.
What is Rosemary De Perez, NP MSN's MIPS final score?
The 2023 MIPS final score is 74.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.