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

Dr. David Alan Sweetser, MD

Individual provider Pediatrics Physician · NPI 1558320762

Dr. David Alan Sweetser, MD practises Hematology/Oncology in Boston, Massachusetts. Graduated from Washington University School of Medicine in 1989, 37 years ago. Practices with Massachusetts General Physicians Organization Inc, a 3,484-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
37
Trained at
Washington University School of Medicine
Licensed in
MA
In the registry since
2006
Specialties on file
4
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

55 Fruit St Yaw 8B Pediatric Hematology Oncology
Boston, MA 02114-2696
Phone: (617) 726-2737
Fax: (617) 724-0702
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Genetics (M.D.) Physician (primary) Taxonomy 207SG0201X · Licence 216677 (MA)
Pediatrics Physician Taxonomy 208000000X · Licence 216677 (MA)
Clinical Biochemical Genetics Physician Taxonomy 207SG0202X · Licence 216677 (MA)
Pediatric Hematology & Oncology Physician Taxonomy 2080P0207X · Licence 216677 (MA)

Record details

NPI number1558320762
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 17, 2006
Last updated in NPPESJanuary 15, 2019

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesPEDIATRIC MEDICINE
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Massachusetts General Physicians Organization Inc — 3484 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 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.

Skin biopsy 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 patients17
Services billed 108 a service is one billed item, such as a visit, a test or a procedure
Average patient age40

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.

Colleagues at Massachusetts General Physicians Organization Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3484 clinicians in the practice; 12 are shown here.

Other providers in Boston