NPPES file of Aug 9, 2026

Sonja Demara Cahoon, CNM

Registered Nurse · Fairfield, CA

Sonja Demara Cahoon, CNM is a registered nurse with a practice address in Fairfield, California, and NPI 1902104250, issued on Mar 10, 2011. Check the license (California 537712, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1902104250
Name
Sonja Demara Cahoon
Credential
CNM
Primary taxonomy
Registered Nurse 163W00000X
License number
537712 CA
Self-reported in NPPES; status is on the state search
Practice location
2101 Courage Dr, Fairfield, CA 94533
Phone
(707) 428-1131
Enumerated
Mar 10, 2011
Record last updated
Aug 5, 2025
Fax
(707) 428-1131
Medicare enrollment
Enrolled (PECOS I20120501000496); 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 registered nurse records → All 13,506 in California → Look up another NPI →

Also registered at 2101 Courage Dr

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

  1. Vincent AbenaLicensed Psychiatric Technician1255197778
  2. Nicole AbrenicaAdult Companion1538097233
  3. Lasharey AdamsLicensed Vocational Nurse1902465214
  4. Blessing AdesugbaLicensed Vocational Nurse1700297850
  5. Melisa AguirreMarriage & Family Therapist1922745355
  6. Porsha AldeRehabilitation Practitioner1811447154

Verify Sonja Demara Cahoon 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 537712    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Permanente Medical Group IncSanta Rosa, CA

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

Sonja Demara Cahoon among 13,506 registered nurse records in California

Sonja Demara Cahoon, CNM is one of 13,506 registered nurse records with a practice address in California. 3% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 19% of them.

  • NPI issued2011 · 19% of these records are older, 79% newer
  • In a Medicare fileYes · 3% of these records are
  • In the CMS Doctors and Clinicians fileYes · 1% of these records are
  • Graduated2009 · median 2018 among the 146 with a school on file
  • Record last updated2025 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 163W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

108 registered nurse records list a practice address in Fairfield

They are 108 of the 3,595 NPPES records with a practice address in Fairfield, and 13,506 registered nurse records in California.

All 13,506 in California → Every provider in Fairfield → Registered Nurse nationwide →

The 8 registered nurse records with the nearest ZIP codes

  1. Malissa Blair, RNFairfield, CA 945331003154287
  2. Patrick Mark Dacullo, RNFairfield, CA 945331134467913
  3. Melani De La Vega, RNFairfield, CA 945331417137456
  4. Rhonda Dorsey, RN, BSN, PHNFairfield, CA 945331902167554
  5. Judy Gonzales, RNFairfield, CA 945331023234283
  6. Imelda Merrera, R.N.Fairfield, CA 945331457470239
  7. Barbara Navolanic, RN, PHNFairfield, CA 945331235294976
  8. Rachel Anne RocesFairfield, CA 945331609114917

Common questions

What is Sonja Demara Cahoon, CNM's NPI number?

Sonja Demara Cahoon, CNM's National Provider Identifier (NPI) is 1902104250, issued on Mar 10, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Sonja Demara Cahoon, CNM located?

The NPPES record lists a practice address at 2101 Courage Dr, Fairfield, CA, 94533. Phone: (707) 428-1131. Providers update this record themselves, so call before visiting.

How can I verify Sonja Demara Cahoon, CNM's license?

NPPES lists California license number 537712, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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.