Quick answers
- Does Evan J. Zahner accept Medicare assignment?
- Yes. Medicare's clinician data says Evan J. Zahner 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 Evan J. Zahner see?
- In 2024, CMS data shows 787 Original Medicare patients and 24,129 services for Evan J. Zahner. This counts Original Medicare only and measures volume, not quality.
- What is Evan J. Zahner's NPI number?
- 1154378479. 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 Evan J. Zahner, 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 | 787 |
|---|---|
| Services billed to Medicare | 24,129 |
| Different services or procedures | 80 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)12,564 services
- Hyaluronan or derivative, synojoynt, for intra-articular injection, 1 mg (J7331)6,280 services
- Aspiration and/or injection of fluid large joint using ultrasound guidance (20611)770 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)764 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)360 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 cholesterol75%
- Arthritis75%
- High blood pressure74%
- Anxiety35%
- Chronic kidney disease32%
- Diabetes27%
Hospitals where Evan J. Zahner works
Medicare's Facility Affiliation Data lists Evan J. Zahner 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.
- Melrosewakefield HealthcareMelrose, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220070
- Tufts Medical CenterBoston, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220116
- Winchester HospitalWinchester, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220105
Practice locations
Addresses where Evan J. Zahner is enrolled with Medicare (CMS data updated October 2, 2026).
- 92 Montvale Ave, Suite 1400Stoneham, MA 02180 (781) 279‑7040
Group practices
Medicare enrollment lists Evan J. Zahner as a member of this group (CMS data updated October 2, 2026).
- Orthopedic Surgery, Inc25 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Stoneham
Clinicians with the same Medicare primary specialty in Stoneham, MA — not a recommendation.
Other clinicians in Orthopedic Surgery, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Columbia University College Of Physicians And Surgeons |
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1154378479 |
| 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