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

Dr. Alfred W. Heinser, MD

Individual provider Internal Medicine Physician · NPI 1871570218

Dr. Alfred W. Heinser, MD is an Internal Medicine in Groton, Massachusetts. Graduated from University of Massachusetts Medical School in 1999, 27 years ago. Practices with Emerson Practice Associates, Inc, a 247-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
27
Trained at
University of Massachusetts Medical School
Licensed in
MA
In the registry since
2005
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

100 Boston Rd
Groton, MA 01450-1860
Phone: (978) 448-4300
Fax: (978) 448-4040
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 208727 (MA)

Record details

NPI number1871570218
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 28, 2005
Last updated in NPPESJuly 13, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 1999 (27 years in practice)
Group practice Emerson Practice Associates, Inc — 247 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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