NPPES file of Aug 9, 2026

Maria S. Baron, NP

Family Nurse Practitioner · Guerneville, CA

Maria S. Baron, NP is a family nurse practitioner with a practice address in Guerneville, California, and NPI 1891319455, issued on May 29, 2020. Check the license (California 95022197, 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
1891319455
Name
Maria S. Baron
Credential
NP
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License numbers
95022197 CA
754636 CA
Self-reported in NPPES; status is on the state search
Practice location
16387 First St, Guerneville, CA 95446
Phone
(619) 840-4929
Enumerated
May 29, 2020
Record last updated
Apr 24, 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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Also registered at 16387 First St

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

  1. Patricia Cerone, NPFamily Nurse Practitioner1356178933
  2. Allison PiersonFamily Nurse Practitioner1922806157

Verify Maria S. Baron 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 95022197    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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3% fewer Medicare Part D claims than the average family nurse practitioner in 2024

1,263 Medicare Part D claims for 206 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. 114 claims were for opioids.

  1. Maria Baron1,263
  2. Specialty average1,305

Most prescribed

  1. Atorvastatin Calcium71 claims
  2. Lisinopril65 claims
  3. Amlodipine Besylate50 claims
  4. Trazodone Hcl45 claims
  5. Hydrocodone-Acetaminophen43 claims
  6. Levothyroxine Sodium43 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.

9 family nurse practitioner records list a practice address in Guerneville

They are 9 of the 51 NPPES records with a practice address in Guerneville, and 16,966 family nurse practitioner records in California.

All 9 in Guerneville → All 16,966 in California → Every provider in Guerneville →

Other family nurse practitioner records in California

  1. Danielle Aaroe, FAMILY NURSE PRACTITOroville, CA1750767083
  2. Joshua AaronMission Hills, CA1477291805
  3. Orly Aaron, NPSan Francisco, CA1376912451
  4. Paris Gilbert Russ AaronSacramento, CA1871079111
  5. Tiffanne Aaronsen, FNPIndio, CA1568191807
  6. Alvin Joseph Abad, FNP-CSan Francisco, CA1154919306
  7. Frances Abad, FNPLos Angeles, CA1053504514
  8. Nnenna AbaezeLong Beach, CA1457820763
  9. Raymond Abagat, FNPTorrance, CA1306685821
  10. Ashley AbalCastaic, CA1740140698

Common questions

What is Maria S. Baron, NP's NPI number?

Maria S. Baron, NP's National Provider Identifier (NPI) is 1891319455, issued on May 29, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Maria S. Baron, NP located?

The NPPES record lists a practice address at 16387 First St, Guerneville, CA, 95446. Phone: (619) 840-4929. Providers update this record themselves, so call before visiting.

How can I verify Maria S. Baron, NP's license?

NPPES lists California license number 95022197, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Maria S. Baron, NP prescribe under Medicare Part D?

In 2024, Maria S. Baron, NP had 1,263 Medicare Part D claims for 206 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.