Quick answers
- Does Justin N. Dorfman accept Medicare assignment?
- Yes. Medicare's clinician data says Justin N. Dorfman 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 Justin N. Dorfman see?
- In 2024, CMS data shows 390 Original Medicare patients and 5,879 services for Justin N. Dorfman. This counts Original Medicare only and measures volume, not quality.
- What is Justin N. Dorfman's NPI number?
- 1053339432. 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 Justin N. Dorfman, 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 patients | 390 |
|---|---|
| Services billed to Medicare | 5,879 |
| Different services or procedures | 73 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)4,720 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)201 services
- Aspiration and/or injection of fluid from large joint (20610)113 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)105 services
- Blood test, lipids (cholesterol and triglycerides) (80061)71 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 cholesterol73%
- Arthritis63%
- High blood pressure57%
- Anxiety24%
- Depression23%
- Chronic kidney disease23%
Hospitals where Justin N. Dorfman works
Medicare's Facility Affiliation Data lists Justin N. Dorfman 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.
- Marlborough HospitalMarlborough, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220049
- Metrowest Medical CenterFramingham, MA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 220175
- Milford Regional Medical CenterMilford, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220090
- UMass Memorial Medical Center/University CampusWorcester, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220163
Practice locations
Addresses where Justin N. Dorfman is enrolled with Medicare (CMS data updated October 2, 2026).
- 24 Newton StSouthborough, MA 01772 (508) 486‑4472
Group practices
Medicare enrollment lists Justin N. Dorfman as a member of this group (CMS data updated October 2, 2026).
- Reliant Medical Group Inc640 clinicians in the group
Specialties
Other family doctors in Massachusetts
Clinicians with the same Medicare primary specialty in Massachusetts — not a recommendation.
Other clinicians in Reliant Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Lake Erie College Of Osteopathic Medicine, Erie |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1053339432 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians