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General Surgery

Michael J. Mastrangelo Jr., MD

Works at hospitals in Bend, OR · Oregon

Summary

Dr. Michael J. Mastrangelo Jr., MD is a general surgeon at 2450 NE Mary Rose Pl, Suite 210, Bend, OR 97701. Phone: (541) 383-2200. Accepts Medicare assignment. In 2024, Michael J. Mastrangelo Jr. had 172 Original Medicare patients and 523 services. NPI 1306802350. 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.

  • Specialty: General surgeon (Medicare lists General Surgery)
  • Address: 2450 NE Mary Rose Pl, Suite 210, Bend, OR 97701 · Directions
  • Phone: (541) 383‑2200
  • Medicare: Accepts Medicare assignment
  • Hospital: St Charles Medical Center - Bend
  • Medical school: Indiana University School Of Medicine · graduated 1992 (34 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Michael J. Mastrangelo Jr., 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 Michael J. Mastrangelo Jr. accept Medicare assignment?
Yes. Medicare's clinician data says Michael J. Mastrangelo Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Michael J. Mastrangelo Jr. see?
In 2024, CMS data shows 172 Original Medicare patients and 523 services for Michael J. Mastrangelo Jr.. This counts Original Medicare only and measures volume, not quality.
What is Michael J. Mastrangelo Jr.'s NPI number?
1306802350. 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 Michael J. Mastrangelo Jr., 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 patients172
Services billed to Medicare523
Different services or procedures43
Participating Medicare providerYes
Average age of these patients72

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)144 services
  2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)93 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)64 services
  4. Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)27 services
  5. Repair of groin hernia using an endoscope (49650)16 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 cholesterol66%
  • High blood pressure53%
  • Arthritis42%
  • Ischemic heart disease26%
  • Anxiety19%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)18%

Hospitals where Michael J. Mastrangelo Jr. works

Medicare's Facility Affiliation Data lists Michael J. Mastrangelo Jr. 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 Michael J. Mastrangelo Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

Specialties

Find other General Surgery doctors in Oregon →

Other general surgeons in Bend

Clinicians with the same Medicare primary specialty in Bend, OR — not a recommendation.

All general surgeons in Bend →

Clinician information

CredentialMD
Medical schoolIndiana University School Of Medicine
Graduation year1992 (34 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1306802350
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