NPPES file of Aug 9, 2026

Erin Cassidy O'Connor

Nurse Practitioner · San Francisco, CA

Erin Cassidy O'Connor is a nurse practitioner with a practice address in San Francisco, California, and NPI 1093561813, issued on Apr 24, 2024. Check the license (California NP95031124, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1093561813
Name
Erin Cassidy O'Connor
Primary taxonomy
Nurse Practitioner 363L00000X
License numbers
NP95031124 CA
95237032 CA
Self-reported in NPPES; status is on the state search
Practice location
240 Shotwell St, San Francisco, CA 94110
Phone
(415) 552-3870
Enumerated
Apr 24, 2024
Record last updated
Aug 30, 2024
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →

Also registered at 240 Shotwell St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ricardo Alvarez, MDAdult Medicine Physician1649352626
  2. Alexy Andrade, RN, MSN, FNP-CFamily Nurse Practitioner1245830223
  3. Maria AparicioClinical Social Worker1649963372
  4. Ivonne Armas De BernardoCase Manager/Care Coordinator1578493607
  5. Pilar Bernal De Pheils, NPFamily Nurse Practitioner1366501215
  6. Seleina Bravo LoeraFamily Nurse Practitioner1255028999

Verify Erin Cassidy O'Connor in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license NP95031124    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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90% fewer Medicare Part D claims than the average nurse practitioner in 2024

116 Medicare Part D claims for 70 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D.

  1. Erin O'Connor116
  2. Specialty average1,109

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.

Erin Cassidy O'Connor among 8,223 nurse practitioner records in California

Erin Cassidy O'Connor is one of 8,223 nurse practitioner records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 87% of them.

  • NPI issued2024 · 87% of these records are older, 7% newer
  • In a Medicare fileYes · 65% of these records are
  • In the CMS Doctors and Clinicians fileNo · 42% of these records are
  • Record last updated2024 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Nurse Practitioner providers in California

There are 8,223 nurse practitioner records in California.

All 8,223 in California → Every provider in San Francisco → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Sean BradenSan Francisco, CA 941101568600690
  2. Lorinda Coombs, N.P.San Francisco, CA 941101952510737
  3. Genell Hilton, PHD, NPSan Francisco, CA 941101245439488
  4. Cynthia Johnson, N.P., M.S.N., R.N.San Francisco, CA 941101235231531
  5. Susan Korbel, NPSan Francisco, CA 941101619059607
  6. Bessa Makoni, NPSan Francisco, CA 941101962734269
  7. Candace Matthews, BSN, RN, MSN, FNPSan Francisco, CA 941101316271745
  8. Linne McAleer, N.P.San Francisco, CA 941101215957311

Common questions

What is Erin Cassidy O'Connor's NPI number?

Erin Cassidy O'Connor's National Provider Identifier (NPI) is 1093561813, issued on Apr 24, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Erin Cassidy O'Connor located?

The NPPES record lists a practice address at 240 Shotwell St, San Francisco, CA, 94110. Phone: (415) 552-3870. Providers update this record themselves, so call before visiting.

How can I verify Erin Cassidy O'Connor's license?

NPPES lists California license number NP95031124, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Erin Cassidy O'Connor prescribe under Medicare Part D?

In 2024, Erin Cassidy O'Connor had 116 Medicare Part D claims for 70 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.