Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. John Bernard O'Brien

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1558488437

Mr. John Bernard O'Brien is a Marriage and Family Therapist in Modesto, California. Qualified in 2019, 7 years ago. Practices with Sud Specialty Group - Ca, a 499-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
7
Licensed in
CA
In the registry since
2007
Specialties on file
2
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Practice location Address checks out

2516 Maestro Way
Modesto, CA 95355-9658
Phone: (209) 505-3900
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Marriage & Family Therapist (primary) Taxonomy 106H00000X · Licence 138808 (CA)
Addiction (Substance Use Disorder) Counselor Taxonomy 101YA0400X · Licence C051710318 (CA)

Record details

NPI number1558488437
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedMarch 23, 2007
Last updated in NPPESNovember 17, 2023
Certification dateNovember 17, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyMARRIAGE AND FAMILY THERAPIST
Medical schoolOTHER
Graduated 2019 (7 years in practice)
Group practice Sud Specialty Group - Ca — 499 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Modesto