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

John Chiosi, MD

Individual provider Infectious Disease Physician · NPI 1306231097

John Chiosi, MD is an Infectious Disease in Boston, Massachusetts. Graduated from Icahn School of Medicine at Mount Sinai in 2015, 11 years ago. Practices with Mass General Brigham Medical Group Western Massachusetts Inc, a 293-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
11
Trained at
Icahn School of Medicine at Mount Sinai
Licensed in
MA
In the registry since
2015
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

55 Fruit St Cox 5
Boston, MA 02114
Phone: (617) 726-3906
Fax: (617) 726-7653
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence 279009 (MA)

Record details

NPI number1306231097
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 31, 2015
Last updated in NPPESJune 1, 2023
Certification dateJune 1, 2023
Mailing address55 Fruit St., Cox-5, Boston, MA 02114

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Medical schoolICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
Graduated 2015 (11 years in practice)
Group practice Mass General Brigham Medical Group Western Massachusetts Inc — 293 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations6 on file with Medicare

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