Katharine Willcoxon, NP
Acute Care Nurse Practitioner · San Francisco, CA
Katharine Willcoxon, NP is an acute care nurse practitioner with a practice address in San Francisco, California, and NPI 1104351667, issued on Apr 21, 2017. Check the license (California 95007446, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katharine Willcoxon
- Credential
- NP
- Primary taxonomy
- Acute Care Nurse Practitioner 363LA2100X
- License numbers
- 95007446 CA
729075 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Parnassus Ave # 116, San Francisco, CA 94143
- Phone
- (415) 353-1551
- Enumerated
- Apr 21, 2017
- Record last updated
- Oct 2, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20171016002506); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest acute care nurse practitioner records → All 1,810 in California → Look up another NPI →
Verify Katharine Willcoxon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95007446Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average acute care nurse practitioner in 2024
271 Medicare Part D claims for 78 beneficiaries, against an average of 594 among the 13,133 providers of this specialty who prescribed in Part D. 43 claims were for opioids.
Most prescribed
- Oxycodone Hcl40 claims
- Sulfamethoxazole-Trimethoprim26 claims
- Prednisone20 claims
- Omeprazole16 claims
- Fluconazole13 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.
Bills Medicare through 2 group practices
- Ucsf Dept OF SurgerySan Francisco, CA
- Ucsf Medical Group Business ServicesSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katharine Willcoxon among 1,810 acute care nurse practitioner records in California
Katharine Willcoxon, NP is one of 1,810 acute care nurse practitioner records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 39% of them.
- NPI issued2017 · 39% of these records are older, 57% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2017 · median 2018 among the 993 with a school on file
- Record last updated2018 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Acute Care Nurse Practitioner providers in California
There are 1,810 acute care nurse practitioner records in California.
All 1,810 in California → Every provider in San Francisco → Acute Care Nurse Practitioner nationwide →
The 8 acute care nurse practitioner records with the nearest ZIP codes
- Christopher Acebedo, NPSan Francisco, CA 941431104085109
- Maureen Mary Arriola, NPSan Francisco, CA 941431063656122
- Marlene BurtSan Francisco, CA 941431740482405
- Thomas Farley, NP MSNSan Francisco, CA 941431629100656
- Cana Jenkins, RN, ACNPSan Francisco, CA 941431427295070
- Kenneth Johnson, N.P.San Francisco, CA 941431598956856
- Carl Kulpa, DNP, ANP-BC, ACNP-BCSan Francisco, CA 941431073846044
- Lesha McPeak, NPSan Francisco, CA 941431568777308
Common questions
What is Katharine Willcoxon, NP's NPI number?
Katharine Willcoxon, NP's National Provider Identifier (NPI) is 1104351667, issued on Apr 21, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Katharine Willcoxon, NP located?
The NPPES record lists a practice address at 400 Parnassus Ave # 116, San Francisco, CA, 94143. Phone: (415) 353-1551. Providers update this record themselves, so call before visiting.
How can I verify Katharine Willcoxon, NP's license?
NPPES lists California license number 95007446, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Katharine Willcoxon, NP prescribe under Medicare Part D?
In 2024, Katharine Willcoxon, NP had 271 Medicare Part D claims for 78 beneficiaries; the average among acute care nurse practitioner prescribers was 594. 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.
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.