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

Diane Lockhart, MD

Individual provider Surgery Physician · NPI 1407917412

Diane Lockhart, MD is a General Surgery in Southborough, Massachusetts. Graduated from University of Massachusetts Medical School in 1991, 35 years ago. Practices with Reliant Medical Group Inc, a 638-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
35
Trained at
University of Massachusetts Medical School
Licensed in
MA
In the registry since
2006
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

24 Newton St
Southborough, MA 01772-1215
Phone: (508) 486-4472
Fax: (508) 486-4474
Show map & directions

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

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 151434 (MA)

Record details

NPI number1407917412
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 13, 2006
Last updated in NPPESMarch 28, 2025
Certification dateMarch 28, 2025
Mailing address24 Newton St, Southborough, MA 01772-1215

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 1991 (35 years in practice)
Group practice Reliant Medical Group Inc — 638 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount