NPPES file of Aug 9, 2026

Joseph Francis Bielefeld, PMHNP-BC/FNP

Psychiatric/Mental Health Nurse Practitioner · Fairfield, CA

Joseph Francis Bielefeld, PMHNP-BC/FNP is a psychiatric/mental health nurse practitioner with a practice address in Fairfield, California, and NPI 1124639943, issued on Aug 14, 2020. Check the license (California 1124639943, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1124639943
Name
Joseph Francis Bielefeld
Credential
PMHNP-BC/FNP
Primary taxonomy
Psychiatric/Mental Health Nurse Practitioner 363LP0808X
License number
1124639943 CA
Self-reported in NPPES; status is on the state search
Practice location
4820 Business Center Dr, Fairfield, CA 94534
Phone
(707) 224-8266
Enumerated
Aug 14, 2020
Record last updated
May 20, 2025
Fax
(707) 425-9880
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 psychiatric/mental health nurse practitioner records → All 4,226 in California → Look up another NPI →

Also registered at 4820 Business Center Dr

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

  1. Paul EliopoulosStudent in an Organized Health Care Education/Training Program1528678182
  2. Leah Fein, LMFTMarriage & Family Therapist1174851836
  3. Joseph GreeneCase Manager/Care Coordinator1093429276
  4. Patricia JamesonSocial Worker1790204345
  5. Joaleen Johnson, RN, PMHNPPsychiatric/Mental Health Nurse Practitioner1326549858
  6. Krystal Johnson, LCSWSocial Worker1114386018

Verify Joseph Francis Bielefeld 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 1124639943    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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Joseph Francis Bielefeld among 4,226 psychiatric/mental health nurse practitioner records in California

Joseph Francis Bielefeld, PMHNP-BC/FNP is one of 4,226 psychiatric/mental health nurse practitioner records with a practice address in California. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2020, is newer than 41% of them.

  • NPI issued2020 · 41% of these records are older, 54% newer
  • In a Medicare fileNo · 62% of these records are
  • In the CMS Doctors and Clinicians fileNo · 46% of these records are
  • Record last updated2025 · 16% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Psychiatric/Mental Health Nurse Practitioner providers in California

There are 4,226 psychiatric/mental health nurse practitioner records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 4,226 in California → Every provider in Fairfield → Psychiatric/Mental Health Nurse Practitioner nationwide →

The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes

  1. Kari CorderoFairfield, CA 945341982913489
  2. Joaleen Johnson, RN, PMHNPFairfield, CA 945341326549858
  3. Jamie Johnson, RN, PMHNP-BCFairfield, CA 945341215583919
  4. Hamdat OwohaFairfield, CA 945341487527842
  5. John Weixler, NPFairfield, CA 945341699438820
  6. Christine Aye, RNFairfield, CA 945331194601716
  7. Lauren Carrizosa, NPFairfield, CA 945331013463827
  8. Sharon Figueroa, PMHNP-BCFairfield, CA 945331417476680

Common questions

What is Joseph Francis Bielefeld, PMHNP-BC/FNP's NPI number?

Joseph Francis Bielefeld, PMHNP-BC/FNP's National Provider Identifier (NPI) is 1124639943, issued on Aug 14, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Joseph Francis Bielefeld, PMHNP-BC/FNP located?

The NPPES record lists a practice address at 4820 Business Center Dr, Fairfield, CA, 94534. Phone: (707) 224-8266. Providers update this record themselves, so call before visiting.

How can I verify Joseph Francis Bielefeld, PMHNP-BC/FNP's license?

NPPES lists California license number 1124639943, 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. 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.