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

Stephen J Ryzewicz, MD

Individual provider Addiction Medicine (Preventive Medicine) Physician · NPI 1689774796

Stephen J Ryzewicz, MD is a Hospitalist in Springfield, Massachusetts. Graduated from University of Massachusetts Medical School in 1984, 42 years ago. Practices with Baystate Medical Practices Inc, a 1,346-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
42
Trained at
University of Massachusetts Medical School
Licensed in
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.

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Practice location Address checks out

759 Chestnut St
Springfield, MA 01107-1619
Phone: (413) 794-6297
Fax: (413) 794-1767
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 57441 (MA)
Addiction Medicine (Preventive Medicine) Physician Taxonomy 2083A0300X · Licence 57441 (MA)
Hospitalist Physician Taxonomy 208M00000X · Licence 57441 (MA)

Record details

NPI number1689774796
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 25, 2006
Last updated in NPPESApril 17, 2019
Mailing address280 Chestnut St, 2nd Floor, Springfield, MA 01199-1001

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesADDICTION MEDICINE, INTERNAL MEDICINE
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 1984 (42 years in practice)
Group practice Baystate Medical Practices Inc — 1346 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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