Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Benjamin Shaw Nelson

Individual provider Surgery Physician · NPI 1609239664

Benjamin Shaw Nelson practises General Surgery in Boston, Massachusetts. Graduated from Boston University School of Medicine in 2016, 10 years ago. Practices with Mainehealth, a 2,615-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts and Maine.

Years since qualifying
10
Trained at
Boston University School of Medicine
Licensed in
MA, ME
In the registry since
2016
Specialties on file
2
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Practice location Address checks out

88 E Newton St C515
Boston, MA 02118-2308
Phone: (617) 638-8442
Fax: (617) 638-8409
Show map & directions

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

Additional practice locations (1)

  • 16 Fahy St, Belfast, ME 04915-6029 — (978) 500-6951

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 267551 (MA)
Surgery Physician Taxonomy 208600000X · Licence MD24311 (ME)

Record details

NPI number1609239664
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMarch 29, 2016
Last updated in NPPESMarch 4, 2021
Certification dateMarch 4, 2021

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolBOSTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2016 (10 years in practice)
Group practice Mainehealth — 2615 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Colonoscopy 1–10 times
Upper gastrointestinal (GI) endoscopy for acid reflux 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients18
Services billed 43 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Mainehealth Pen Bay Hospital Hospital · Rockport, ME
  • Mainehealth Waldo Hospital Hospital · Belfast, ME

Colleagues at Mainehealth

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2615 clinicians in the practice; 12 are shown here.

Other providers in Boston