NPPES file of Aug 9, 2026

Rebecca Ann Willenborg, MSN, FNP

Obstetrics & Gynecology Nurse Practitioner · Roseville, CA

Rebecca Ann Willenborg, MSN, FNP is an obstetrics & gynecology nurse practitioner with a practice address in Roseville, California, and NPI 1861653800, issued on Jun 23, 2008. Check the license (California NP11414, 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
1861653800
Name
Rebecca Ann Willenborg
Credential
MSN, FNP
Primary taxonomy
Obstetrics & Gynecology Nurse Practitioner 363LX0001X
License numbers
NP11414 CA
NPF11414 CA
Self-reported in NPPES; status is on the state search
Practice location
3 Medical Plaza Dr, Roseville, CA 95661
Phone
(916) 733-7977
Enumerated
Jun 23, 2008
Record last updated
Jul 24, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(916) 733-7979
Medicare enrollment
Enrolled (PECOS I20140218000561); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest obstetrics & gynecology nurse practitioner records → All 394 in California → Look up another NPI →

Also registered at 3 Medical Plaza Dr

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

  1. Carolina Alvayay, M.D.Urology Physician1336380286
  2. Stephanie Austin, M.D.Otolaryngology Physician1629399126
  3. Beverly Bruce, OTOccupational Therapist1366557266
  4. Douglas Canlas, M.D.Internal Medicine Physician1871721654
  5. Kim David Canlas, M.D.Internal Medicine Physician1982920401
  6. April Cauthen, NPNurse Practitioner1225185622

Verify Rebecca Ann Willenborg 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 NP11414    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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25% more Medicare Part D claims than the average obstetrics & gynecology nurse practitioner in 2024

247 Medicare Part D claims for 86 beneficiaries, against an average of 198 among the 1,094 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.

  1. Rebecca Willenborg247
  2. Specialty average198

Most prescribed

  1. Estradiol113 claims
  2. Fluconazole13 claims
  3. Clotrimazole-Betamethasone12 claims
  4. Vagifem12 claims
  5. Valacyclovir11 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 one group practice

  1. Sutter Valley Medical FoundationRoseville, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Rebecca Ann Willenborg among 394 obstetrics & gynecology nurse practitioner records in California

Rebecca Ann Willenborg, MSN, FNP is one of 394 obstetrics & gynecology nurse practitioner records with a practice address in California. 38% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 61% of them.

  • NPI issued2008 · 61% of these records are older, 33% newer
  • In a Medicare fileYes · 38% of these records are
  • In the CMS Doctors and Clinicians fileYes · 14% of these records are
  • Graduated1999 · median 2010 among the 54 with a school on file
  • Record last updated2015 · 72% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LX0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Obstetrics & Gynecology Nurse Practitioner providers in California

There are 394 obstetrics & gynecology nurse practitioner records in California.

All 394 in California → Every provider in Roseville → Obstetrics & Gynecology Nurse Practitioner nationwide →

The 8 obstetrics & gynecology nurse practitioner records with the nearest ZIP codes

  1. Nancy Cummings, NPRoseville, CA 956611467508770
  2. Marsha Montbriand, NURSE PRACTITIONERRoseville, CA 956611003884727
  3. Catherine Taylor, NURSE PRACTITIONERRoseville, CA 956611033187752
  4. Rita Ciarriocco Kloos, NURSE PRACTITIONERLincoln, CA 956481407906555
  5. Linda Johnson, NPWoodland, CA 956951124048764
  6. Emese Parker, NPWoodland, CA 956951508196379
  7. Michelle Goddard, NPCarmichael, CA 956081568804615
  8. Yuliya Golubova, N.P.Carmichael, CA 956081568427722

Common questions

What is Rebecca Ann Willenborg, MSN, FNP's NPI number?

Rebecca Ann Willenborg, MSN, FNP's National Provider Identifier (NPI) is 1861653800, issued on Jun 23, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Rebecca Ann Willenborg, MSN, FNP located?

The NPPES record lists a practice address at 3 Medical Plaza Dr, Roseville, CA, 95661. Phone: (916) 733-7977. Providers update this record themselves, so call before visiting.

How can I verify Rebecca Ann Willenborg, MSN, FNP's license?

NPPES lists California license number NP11414, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Rebecca Ann Willenborg, MSN, FNP prescribe under Medicare Part D?

In 2024, Rebecca Ann Willenborg, MSN, FNP had 247 Medicare Part D claims for 86 beneficiaries; the average among obstetrics & gynecology nurse practitioner prescribers was 198. 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.