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

Timothy A Johnson, MD

Individual provider Hematology & Oncology Physician · NPI 1801879762

Timothy A Johnson, MD is a Hematology/Oncology in Springfield, Massachusetts. Graduated from University of Connecticut School of Medicine in 1992, 34 years ago. Practices with Mercy Medical Group Inc, a 17-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
34
Trained at
University of Connecticut School of Medicine
Licensed in
MA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

271 Carew St
Springfield, MA 01104
Phone: (413) 748-7370
Fax: (413) 748-7221
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 220236 (MA)

Record details

NPI number1801879762
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 23, 2005
Last updated in NPPESApril 10, 2014
Mailing address271 Carew Street, Springfield, MA 01104

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolUNIVERSITY OF CONNECTICUT SCHOOL OF MEDICINE
Graduated 1992 (34 years in practice)
Group practice Mercy Medical Group Inc — 17 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Springfield