NPPES file of Aug 9, 2026

Joseph Trevor Hardcastle, LMFT

Marriage & Family Therapist · San Luis Obispo, CA

Joseph Trevor Hardcastle, LMFT is a marriage & family therapist with a practice address in San Luis Obispo, California, and NPI 1538368980, issued on Jul 16, 2007. Check the license (California 42434, 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
1538368980
Name
Joseph Trevor Hardcastle
Credential
LMFT
Primary taxonomy
Marriage & Family Therapist 106H00000X
License number
42434 CA
Self-reported in NPPES; status is on the state search
Practice location
2945 Mcmillan Ave, San Luis Obispo, CA 93401
Phone
(805) 781-4275
Enumerated
Jul 16, 2007
Record last updated
Jul 16, 2007 (not updated in 19 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20260508000039); 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 marriage & family therapist records → All 59,889 in California → Look up another NPI →

Also registered at 2945 Mcmillan Ave

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

  1. Allison AlcalaLicensed Psychiatric Technician1417727843
  2. Doreen Dunton, L.V.N.,R.A.S.Counselor1184827818
  3. Darcy Eastman NusbaumPeer Specialist1831968627
  4. Chris Eaton, MFT INTERNMarriage & Family Therapist1730396169
  5. Mardi Geredes, MA, RRWAddiction (Substance Use Disorder) Counselor1194931014
  6. Molly JohnsonLicensed Psychiatric Technician1740846476

Verify Joseph Trevor Hardcastle 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 42434    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 Trevor Hardcastle among 59,889 marriage & family therapist records in California

Joseph Trevor Hardcastle, LMFT is one of 59,889 marriage & family therapist records with a practice address in California. 4% 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 2007, is newer than 7% of them.

  • NPI issued2007 · 7% of these records are older, 77% newer
  • In a Medicare fileNo · 4% of these records are
  • In the CMS Doctors and Clinicians fileYes · 8% of these records are
  • Graduated2002 · median 2013 among the 4,574 with a school on file
  • Record last updated2007 · 50% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 106H00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

375 marriage & family therapist records list a practice address in San Luis Obispo

They are 375 of the 3,403 NPPES records with a practice address in San Luis Obispo, and 59,889 marriage & family therapist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 59,889 in California → Every provider in San Luis Obispo → Marriage & Family Therapist nationwide →

The 8 marriage & family therapist records with the nearest ZIP codes

  1. Peggy Atwill, MFTSan Luis Obispo, CA 934011285704106
  2. Anne Griffin, M.A.San Luis Obispo, CA 934011689746976
  3. Carolyn Henderson, MFTSan Luis Obispo, CA 934011821076985
  4. Brenda Hiemstra, MFTSan Luis Obispo, CA 934011518077874
  5. Anthony HuffakerSan Luis Obispo, CA 934011851463186
  6. Robin Inouye, LMFTSan Luis Obispo, CA 934011285705368
  7. Jane Jorgensen, LMFTSan Luis Obispo, CA 934011952406126
  8. Deborah Lyon, DDS MFT INTERNSan Luis Obispo, CA 934011770515470

Common questions

What is Joseph Trevor Hardcastle, LMFT's NPI number?

Joseph Trevor Hardcastle, LMFT's National Provider Identifier (NPI) is 1538368980, issued on Jul 16, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Joseph Trevor Hardcastle, LMFT located?

The NPPES record lists a practice address at 2945 Mcmillan Ave, San Luis Obispo, CA, 93401. Phone: (805) 781-4275. Providers update this record themselves, so call before visiting.

How can I verify Joseph Trevor Hardcastle, LMFT's license?

NPPES lists California license number 42434, 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.