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Orthopedic Surgery

Joseph L. Sirois Iii, MD

Works at hospitals in Milton, MA · Massachusetts

Summary

Dr. Joseph L. Sirois Iii, MD is an orthopedic surgeon at 100 Highland St, Suite G 3, Milton, MA 02186. Phone: (617) 696-9299. Accepts Medicare assignment. In 2024, Joseph L. Sirois Iii had 293 Original Medicare patients and 2,419 services. NPI 1841283942. 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: Orthopedic surgeon (Medicare lists Orthopedic Surgery)
  • Address: 100 Highland St, Suite G 3, Milton, MA 02186 · Directions (1 more location)
  • Phone: (617) 696‑9299
  • Medicare: Accepts Medicare assignment
  • Hospital: Beth Israel Deaconess Hospital - Milton
  • Group practice: Orthopaedic Specialists of Massachusetts LLC (+1 more)
  • Medical school: Tufts University School Of Medicine · graduated 1983 (43 years since medical school)
  • Gender (as listed): Male
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Joseph L. Sirois Iii, 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 Joseph L. Sirois Iii accept Medicare assignment?
Yes. Medicare's clinician data says Joseph L. Sirois Iii 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 Joseph L. Sirois Iii see?
In 2024, CMS data shows 293 Original Medicare patients and 2,419 services for Joseph L. Sirois Iii. This counts Original Medicare only and measures volume, not quality.
What is Joseph L. Sirois Iii's NPI number?
1841283942. 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 Joseph L. Sirois Iii, 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 patients293
Services billed to Medicare2,419
Different services or procedures60
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)1,171 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)266 services
  3. Aspiration and/or injection of fluid from large joint (20610)185 services
  4. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)93 services
  5. X-ray of knee, 1-2 views (73560)80 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 pressure74%
  • High cholesterol74%
  • Arthritis62%
  • Anxiety32%
  • Diabetes23%
  • Ischemic heart disease22%

Hospitals where Joseph L. Sirois Iii works

Medicare's Facility Affiliation Data lists Joseph L. Sirois Iii 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 Joseph L. Sirois Iii is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Joseph L. Sirois Iii as a member of these groups (CMS data updated October 2, 2026).

  • Orthopaedic Specialists of Massachusetts LLC8 clinicians in the group
  • Orthopaedic Specialists of Massachusetts PC6 clinicians in the group

Specialties

Find other Orthopedic Surgery doctors in Massachusetts →

Other orthopedic surgeons in Milton

Clinicians with the same Medicare primary specialty in Milton, MA — not a recommendation.

All orthopedic surgeons in Milton →

Other clinicians in Orthopaedic Specialists of Massachusetts LLC

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

Clinician information

CredentialMD
Medical schoolTufts University School Of Medicine
Graduation year1983 (43 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1841283942
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