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

Jon J Ernstoff, MD

Individual provider Gastroenterology Physician · NPI 1598789653

Jon J Ernstoff, MD is a Gastroenterology in Meriden, Connecticut. Qualified in 1978, 48 years ago. Practices with Baystate Medical Practices Inc, a 1,346-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Connecticut and Massachusetts.

Years since qualifying
48
Licensed in
CT, MA
In the registry since
2006
Specialties on file
3
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

455 Lewis Ave Ste 106
Meriden, CT 06451-2121
Phone: (203) 886-0036
Fax: (203) 886-0072
Show map & directions

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

Additional practice locations (1)

  • 48 Sanderson St Fl 2, Greenfield, MA 01301-2778 — (413) 773-2655

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 025772 (CT)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 1022596 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 025772 (CT)

Record details

NPI number1598789653
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 26, 2006
Last updated in NPPESApril 3, 2025
Certification dateApril 3, 2025
Mailing address2139 Silas Deane Hwy, Rocky Hill, CT 06067-2336

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolOTHER
Graduated 1978 (48 years in practice)
Group practice Baystate Medical Practices Inc — 1346 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Meriden