Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Pathology

Mazen S. Duwaji, MD

Works at hospitals in Taunton, MA · Fall River, MA · Massachusetts

Summary

Dr. Mazen S. Duwaji, MD is a pathologist at 88 Washington St, Taunton, MA 02780. Phone: (508) 828-7000. May accept Medicare assignment. In 2024, Mazen S. Duwaji had 335 Original Medicare patients and 1,037 services. NPI 1629067152. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Mazen S. Duwaji, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Mazen S. Duwaji accept Medicare assignment?
Medicare's clinician data says Mazen S. Duwaji may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
How many Medicare patients does Mazen S. Duwaji see?
In 2024, CMS data shows 335 Original Medicare patients and 1,037 services for Mazen S. Duwaji. This counts Original Medicare only and measures volume, not quality.
What is Mazen S. Duwaji's NPI number?
1629067152. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Mazen S. Duwaji, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients335
Services billed to Medicare1,037
Different services or procedures20
Participating Medicare providerYes
Average age of these patients72

Most frequent services

  1. Pathology examination of tissue using a microscope, intermediate complexity (88305)497 services
  2. Special stained specimen slides to examine tissue, initial procedure (88342)129 services
  3. Special stained specimen slides to examine tissue, each additional procedure (88341)108 services
  4. Special stained specimen slides to examine tissue including interpretation and report (88313)59 services
  5. Preparation of tissue for examination by removing any calcium present (88311)36 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Arthritis47%
  • Anxiety37%
  • Diabetes35%
  • Depression31%

Hospitals where Mazen S. Duwaji works

Medicare's Facility Affiliation Data lists Mazen S. Duwaji at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Mazen S. Duwaji is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Mazen S. Duwaji as a member of this group (CMS data updated October 2, 2026).

  • Lifespan Physician Group of Massachusetts Inc476 clinicians in the group

Specialties

Find other Pathology doctors in Massachusetts →

Other pathologists in Massachusetts

Clinicians with the same Medicare primary specialty in Massachusetts — not a recommendation.

All pathologists in Massachusetts →

Other clinicians in Lifespan Physician Group of Massachusetts Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Graduation year1978 (48 years since medical school)
Gender (as listed)Male
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1629067152
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians