NPPES file of Aug 9, 2026

Melissa Anne Winkelhaus, NP

Nurse Practitioner · Napa, CA

Melissa Anne Winkelhaus, NP is a nurse practitioner with a practice address in Napa, California, and NPI 1609557149, issued on Jul 27, 2023. Check the license (California 95026050, 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
1609557149
Name
Melissa Anne Winkelhaus
Credential
NP
Primary taxonomy
Nurse Practitioner 363L00000X
License number
95026050 CA
Self-reported in NPPES; status is on the state search
Practice location
2160 Jefferson St Ste 260, Napa, CA 94559
Phone
(707) 259-0700
Enumerated
Jul 27, 2023
Record last updated
Jun 25, 2026
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 2160 Jefferson St Ste 260

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

  1. Lyra Fumiko ChuaNurse Practitioner1407404387

Verify Melissa Anne Winkelhaus 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 95026050    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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77% fewer Medicare Part D claims than the average nurse practitioner in 2024

255 Medicare Part D claims for 48 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.

  1. Melissa Winkelhaus255
  2. Specialty average1,109

Most prescribed

  1. Gabapentin15 claims
  2. Atorvastatin Calcium14 claims
  3. Metformin Hcl13 claims
  4. Breyna12 claims
  5. Trazodone Hcl12 claims
  6. Metoprolol Tartrate11 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.

Melissa Anne Winkelhaus among 8,223 nurse practitioner records in California

Melissa Anne Winkelhaus, NP 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 2023, is newer than 82% of them.

  • NPI issued2023 · 82% of these records are older, 13% newer
  • In a Medicare fileYes · 65% of these records are
  • In the CMS Doctors and Clinicians fileNo · 42% of these records are
  • Record last updated2026 · 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 Napa → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Lyra Fumiko ChuaNapa, CA 945591407404387
  2. Heather Collins, NPNapa, CA 945591215766753
  3. Kristin Gisler, NPNapa, CA 945591194533273
  4. Angela Guadagni, FNPNapa, CA 945591649361908
  5. Richard Kirk, N.P.Napa, CA 945591952492183
  6. Angelica Moore, NP-CNapa, CA 945591003555673
  7. Arcelia Ponce Del Rio, FNPNapa, CA 945591659960490
  8. Edlin RubioNapa, CA 945591891517116

Common questions

What is Melissa Anne Winkelhaus, NP's NPI number?

Melissa Anne Winkelhaus, NP's National Provider Identifier (NPI) is 1609557149, issued on Jul 27, 2023. An NPI identifies a provider in billing; it is not a license.

Where is Melissa Anne Winkelhaus, NP located?

The NPPES record lists a practice address at 2160 Jefferson St Ste 260, Napa, CA, 94559. Phone: (707) 259-0700. Providers update this record themselves, so call before visiting.

How can I verify Melissa Anne Winkelhaus, NP's license?

NPPES lists California license number 95026050, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Melissa Anne Winkelhaus, NP prescribe under Medicare Part D?

In 2024, Melissa Anne Winkelhaus, NP had 255 Medicare Part D claims for 48 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.