Dr. Evan J. Zahner, MD
- Medicare services, 2024
- 22,283
- Medicare patients, 2024
- 787
- Part D claims, 2024
- 182
- MIPS score, 2024
- 100
- Hospital affiliations
- 3
- Practice address
- 92 Montvale Ave, Stoneham, MA 02180
- Practice phone
- Call (781) 279-7040
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Orthopedic Surgery, Inc
Stoneham, Massachusetts
Find Dr. Zahner's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Evan J. Zahner is an orthopedic surgeon in Stoneham, Massachusetts
Dr. Zahner practices at Orthopedic Surgery, Inc in Stoneham, Massachusetts.
Dr. Zahner's NPI, 1154378479, was assigned on May 30, 2006. Dr. Zahner graduated from Columbia University College of Physicians and Surgeons in 1992. Dr. Zahner holds Massachusetts license 152993.
- NPI
- 1154378479NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7012938921
- NPI enumeration date
- May 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (781) 279-7040
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Evan J. Zahner practices at Orthopedic Surgery, Inc in Stoneham, Massachusetts
Dr. Zahner's primary practice is Orthopedic Surgery, Inc, at 92 Montvale Ave, Stoneham, MA 02180 in Middlesex County. The practice phone is (781) 279-7040.
- Orthopedic Surgery, Inc92 Montvale Ave, Stoneham, MA 02180 · Middlesex CountyPhone(781) 279-7040
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Evan J. Zahner is affiliated with 8 sites of care and 1 medical group
Dr. Zahner's primary practice is Orthopedic Surgery, Inc in Stoneham, Massachusetts. Dr. Zahner is also affiliated with Tufts Medical Center. The medical group on file is Agility Orthopedics. Dmand AI also links Dr. Zahner to 2 more hospitals, 3 home health agencies and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Evan J. Zahner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zahner practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Orthopedic Surgery, Inc | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Evan J. Zahner is one of 593 orthopedic surgeons in Massachusetts
Orthopaedic surgery is Dr. Zahner's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Zahner is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery. Dr. Zahner is licensed in Massachusetts.
Specialties and state licenses
- Orthopaedic surgery, MassachusettsPrimary
Orthopedic surgeons near Dr. Zahner
Counts of orthopedic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Evan J. Zahner billed Medicare for 22,283 services in 2024
CMS data shows 22,283 Medicare services from Dr. Zahner across 23 procedure codes in 2024, for 787 Medicare patients. Medicare paid $286,962 for them.
Dr. Zahner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 6,2762024: 19,346208%
- Office and hospital visits
- 2023: 1,1732024: 1,39319%
- Surgery
- 2023: 6492024: 81926%
- Imaging
- 2023: 5822024: 72525%
Where Dr. Zahner's Medicare services took place, 2024
- In an office22,197100%
- In a facility860%
Dr. Zahner compared with the Massachusetts median for orthopedic surgeons, 2024
- Dr. Zahner
- Massachusetts median
- Medicare services
- 22,283vs 67233.2 times
- Medicare patients
- 787vs 3022.6 times
- Part D claims
- 129vs 502.6 times
Medians across 543 orthopedic surgeons in Massachusetts with Dmand AI profiles that report each measure.
Dr. Zahner's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zahner and other orthopedic surgeons in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Evan J. Zahner treated 787 Medicare patients in 2024, average age 76
CMS counts 787 Medicare patients who saw Dr. Zahner in 2024. The largest group is 65 to 74, with 330 patients. 75% of them have arthritis, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Zahner's median patient age at 64, with 57% women.
Dr. Zahner's Medicare patients by age, 2024
Dr. Zahner's Medicare patients by sex, 2024
- Women51565%
- Men27235%
Chronic conditions among Dr. Zahner's Medicare patients, 2024
- Arthritis75%
- High cholesterol75%
- High blood pressure74%
- Anxiety35%
- Chronic kidney disease32%
- Mood disorders29%
- Diabetes27%
- Ischemic heart disease27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zahner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Evan J. Zahner wrote 182 Medicare Part D claims in 2024
In 2024, Dr. Zahner wrote 182 Medicare Part D claims for 104 patients. 98% of them were for generic drugs. CMS names the drug for 129 of them, across 3 drugs with 11 or more claims each, at $256 in total drug cost. In 2023, CMS named 190 claims across 7 drugs.
Dr. Zahner's Part D claims by kind of drug, 2024
- Generic179 claims98%
- Brand-name and other3 claims2%
Dr. Zahner's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Zahner's Part D claims, 2024
- Opioids9%17 of 182 claims
- Antibiotics63%114 of 182 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1902024: 12932%
Drugs named by CMS: 3 in 2024, 7 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Evan J. Zahner scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Zahner for performance year 2024, reported as part of a group. Dr. Zahner accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 39 procedures of hip replacement by Dr. Zahner, more than 82% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Zahner's MIPS scores, performance year 2024
- 100of 100Final score
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Zahner ranks in Medicare procedure volume
- Hip replacement
- 82nd percentile39 procedures
- Knee replacement
- 58th percentile24 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Lower limb (leg) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Evan J. Zahner received $2,223 in industry payments from 2016 to 2025
CMS Open Payments shows 16 general payments to Dr. Zahner from 7 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 88% of the total. Zimmer Biomet Holdings, Inc. paid the most, $2,035.
General payments to Dr. Zahner by program year, 2016 to 2025
General payments to Dr. Zahner by kind, 2016 to 2025
- Travel and lodging$1,95788%
- Food and beverage$26712%
Companies that paid Dr. Zahner the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Evan J. Zahner graduated from Columbia University College of Physicians and Surgeons
Dr. Zahner graduated from Columbia University College of Physicians and Surgeons in 1992.
- Medical school
- Board certified in orthopaedic surgery
Source: Dmand AI Professional Profile Data
Sources for Dr. Evan J. Zahner's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Evan J. Zahner
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Evan J. Zahner's NPI number?
Dr. Evan J. Zahner's NPI number is 1154378479. It was assigned on May 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Evan J. Zahner?
Dr. Evan J. Zahner is an orthopedic surgeon in Stoneham, Massachusetts. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Evan J. Zahner practice?
Dr. Zahner practices at 92 Montvale Ave, Stoneham, MA 02180. Dr. Zahner's primary practice is Orthopedic Surgery, Inc in Stoneham, Massachusetts. Dmand AI also links Dr. Zahner to 2 hospitals, 3 home health agencies and 1 group practice or clinic.
What is Dr. Evan J. Zahner's office phone number?
The practice phone on file for Dr. Zahner is (781) 279-7040.
What is Dr. Evan J. Zahner's medical license number?
Dr. Zahner holds Massachusetts license 152993.
Which hospitals is Dr. Evan J. Zahner affiliated with?
Dr. Zahner is affiliated with Tufts Medical Center. Dmand AI links Dr. Zahner to 2 more hospitals.
What medical group is Dr. Evan J. Zahner part of?
Dr. Zahner is linked to Agility Orthopedics.
Does Dr. Evan J. Zahner accept Medicare?
Yes. CMS data shows Dr. Zahner billed Medicare for 22,283 services in 2024, and Dr. Zahner accepts Medicare assignment.
What is Dr. Evan J. Zahner's MIPS score?
Dr. Zahner's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does Dr. Evan J. Zahner see?
CMS counts 787 Medicare patients who saw Dr. Zahner in 2024, with an average age of 76.
Show 6 more questionsShow fewer questions
Is Dr. Evan J. Zahner board certified?
Yes. Dr. Zahner is board certified in orthopaedic surgery by the American Board of Orthopaedic Surgery.
What services does Dr. Evan J. Zahner bill to Medicare?
In 2024, Dr. Zahner's most billed Medicare services were injected or infused drug (J1010), injected or infused drug (J7331) and surgery: bones and joints (20611).
Where did Dr. Evan J. Zahner go to medical school?
Dr. Zahner graduated from Columbia University College of Physicians and Surgeons in 1992.
What drugs does Dr. Evan J. Zahner prescribe most?
In 2024 Medicare Part D data, Dr. Zahner's most prescribed drugs by claims were Amoxicillin, Oxycodone HCl and Methylprednisolone.
Has Dr. Evan J. Zahner received payments from drug or device companies?
CMS Open Payments shows $2,223 in general payments to Dr. Zahner from 7 companies from 2016 to 2025. The largest total came from Zimmer Biomet Holdings, Inc.
How long has Dr. Evan J. Zahner been practicing?
Dr. Zahner graduated from medical school in 1992, 34 years ago.
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