Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Peter M. Sadow, MD, PHD

Individual provider Anatomic Pathology Physician · NPI 1154493351

Dr. Peter M. Sadow, MD, PHD practises Pathology in Boston, Massachusetts. Graduated from University of Chicago, Pritzker School of Medicine in 2004, 22 years ago. Practices with Massachusetts General Physicians Organization Inc, a 3,484-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
22
Trained at
University of Chicago, Pritzker School of Medicine
Licensed in
MA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

55 Fruit St
Boston, MA 02114-2696
Phone: (617) 643-0800
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 75 Francis St, Boston, MA 02115-6110 — (617) 732-5500
  • 1153 Centre St, Jamaica Plain, MA 02130-3446 — (617) 983-7000

Specialties & licences

Anatomic Pathology Physician (primary) Taxonomy 207ZP0101X · Licence 231642 (MA)

Record details

NPI number1154493351
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorYes
NPI enumeratedNovember 14, 2006
Last updated in NPPESSeptember 4, 2026
Certification dateSeptember 4, 2026

Medicare enrollment

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

Medicare specialtyPATHOLOGY
Medical schoolUNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice Massachusetts General Physicians Organization Inc — 3484 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients673
Services billed 2,449 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

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