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

Stephen J John X, MD

Individual provider Family Medicine Physician · NPI 1942481056

Stephen J John X, MD is a Family Practice in Riverhead, New York. Qualified in 1989, 37 years ago. Practices with Central Suffolk Hospital, a 91-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
37
Licensed in
NY
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

100 Center Dr Riverhead Correctional Facility; Jail Medical Unit
Riverhead, NY 11901-3307
Phone: (631) 852-1989
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 244662-1 (NY)

Record details

NPI number1942481056
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 16, 2007
Last updated in NPPESNovember 16, 2007
Mailing address1300 Roanoke Ave, Riverhead, NY 11901-2031

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 1989 (37 years in practice)
Group practice Central Suffolk Hospital — 91 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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