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

Dr. John J Mariani, MD

Individual provider Addiction Medicine (Psychiatry & Neurology) Physician · NPI 1245383405

Dr. John J Mariani, MD is an Addiction Medicine (Psychiatry & Neurology) Physician in New York, New York. Practices as a sole proprietor and works from 2 locations. Licensed in New York.

Licensed in
NY
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

51 E 25th St Ste 7E
New York, NY 10010-2945
Phone: (646) 609-6771
Fax: (646) 588-1984
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1051 Riverside Dr, New York, NY 10032-1007 — (212) 543-5987

Specialties & licences

Addiction Medicine (Psychiatry & Neurology) Physician (primary) Taxonomy 2084A0401X · Licence 199048 (NY)

Record details

NPI number1245383405
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 19, 2007
Last updated in NPPESFebruary 22, 2020
Certification dateFebruary 22, 2020

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