Arnold Martin Horwitz, PH.D.
Marriage & Family Therapist · San Luis Obispo, CA
Arnold Martin Horwitz, PH.D. is a marriage & family therapist with a practice address in San Luis Obispo, California, and NPI 1538559794, issued on Jan 27, 2015. Check the license (California M5864, 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.
- Name
- Arnold Martin Horwitz
- Credential
- PH.D.
- Primary taxonomy
- Marriage & Family Therapist 106H00000X
- License number
- M5864 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1605 Garnette Drive, San Luis Obispo, CA 93405
- Phone
- (805) 541-2752
- Enumerated
- Jan 27, 2015
- Record last updated
- Jan 27, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest marriage & family therapist records → All 59,889 in California → Look up another NPI →
Verify Arnold Martin Horwitz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license M5864Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Arnold Martin Horwitz among 59,889 marriage & family therapist records in California
Arnold Martin Horwitz, PH.D. 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 2015, is newer than 48% of them.
- NPI issued2015 · 48% of these records are older, 48% newer
- In a Medicare fileNo · 4% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2015 · 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
- Jill AndersonSan Luis Obispo, CA 934051578623427
- Kelly Bell, MFTSan Luis Obispo, CA 934051518937747
- William Clarke, LMFTSan Luis Obispo, CA 934051144360538
- Denise Egan, MFTISan Luis Obispo, CA 934051952465114
- Patty Ford, LMFTSan Luis Obispo, CA 934051447328737
- Katherine McGregor, LMFT MFC 36052San Luis Obispo, CA 934051912057167
- Irianna MontesSan Luis Obispo, CA 934051336284124
- Gina Pinto, LMFTSan Luis Obispo, CA 934051093806556
Common questions
What is Arnold Martin Horwitz, PH.D.'s NPI number?
Arnold Martin Horwitz, PH.D.'s National Provider Identifier (NPI) is 1538559794, issued on Jan 27, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Arnold Martin Horwitz, PH.D. located?
The NPPES record lists a practice address at 1605 Garnette Drive, San Luis Obispo, CA, 93405. Phone: (805) 541-2752. Providers update this record themselves, so call before visiting.
How can I verify Arnold Martin Horwitz, PH.D.'s license?
NPPES lists California license number M5864, 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.
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.