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

John Angelo Gnassi, MD

Individual provider Family Medicine Physician · NPI 1629066105

John Angelo Gnassi, MD is a Hospitalist in Parker, Arizona. Graduated from Rutgers R W Johnson Medical School (CAM/NEW Bruns/Pisc) in 1988, 38 years ago. Practices with Winslow Indian Health Care Center Inc, a 100-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
38
Trained at
Rutgers R W Johnson Medical School (CAM/NEW Bruns/Pisc)
Licensed in
MA
In the registry since
2005
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

12033 Agency Rd
Parker, AZ 85344-7718
Phone: (928) 669-2137
Show map & directions

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

Additional practice locations (1)

  • 103 Garland St, Everett, MA 02149-5066 — (617) 389-6270

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 74549 (MA)

Record details

NPI number1629066105
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 10, 2005
Last updated in NPPESAugust 11, 2022
Certification dateAugust 11, 2022
Mailing address236 Rainbow Dr # 13625, Livingston, TX 77399-2036

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Medical schoolRUTGERS R W JOHNSON MEDICAL SCHOOL (CAM/NEW BRUNS/PISC)
Graduated 1988 (38 years in practice)
Group practice Winslow Indian Health Care Center Inc — 100 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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