Active NPI 1154378479 Individual Practitioner Male Practitioner

Dr. Evan J. Zahner , MD

Orthopaedic Surgery • Stoneham, MA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Evan Zahner, MD is a certified Orthopaedic Surgery practicing in Stoneham, MA. With approximately 34 years of clinical experience since graduating from Columbia University College Of Physicians And Surgeons in 1992, Dr. Zahner delivers high-quality medical care to the local community at 92 MONTVALE AVE.

Dr. Zahner is affiliated with Orthopedic Surgery, Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include injection, methylprednisolone acetate, 1 mg, hyaluronan or derivative, synojoynt, for intra-articular injection, 1 mg, aspiration and/or injection of fluid large joint using ultrasound guidance. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

92 Montvale Ave

Stoneham, MA 021803647

Telephone 7812797040

Associated Practice Facility / Clinic

🏢 Smita Patel, M.d. & Assoc. P.c. Facility NPI 1184720880

Medicare Profile & Education

Medical School

Columbia University College Of Physicians And Surgeons

Graduation Year

1992

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Orthopaedic Surgery in Stoneham, MA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

34 Yrs +4.5 yrs vs City Avg

City Avg: 29.5 Yrs

State Avg: 28.0 Yrs

Regional Practice Density

7 Specialists

Practicing in Stoneham, MA (746 Statewide)

Telehealth Adoption Rate

14.3% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

83.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Zahner (34 Years) 34 Yrs

Stoneham Specialty Average (29.5 Years) 29.5 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J1010 Injection, methylprednisolone acetate, 1 mg	12,564	275	$2.92	$0.13
J7331 Hyaluronan or derivative, synojoynt, for intra-articular injection, 1 mg	6,280	92	$103.10	$10.15
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	770	377	$540.95	$105.22
99213 Established patient office or other outpatient visit, typically 15 minutes	764	481	$325.32	$92.47
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	360	45	$15.00	$0.96
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	355	272	$375.00	$130.66
73564 X-ray of knee, 4 or more views	250	233	$230.29	$60.46
73502 X-ray of hip, 2-3 views	188	171	$216.03	$50.92
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	178	178	$568.44	$113.93
J1030 Injection, methylprednisolone acetate, 40 mg	142	70	$31.19	$6.28
73562 X-ray of knee, 3 views	61	52	$190.88	$43.70
73501 X-ray of hip with pelvis, 1 view	49	37	$141.91	$34.33
73610 X-ray of ankle, minimum of 3 views	42	23	$166.59	$40.05
72100 X-ray of lower and sacral spine, 2-3 views	39	39	$174.90	$43.00
99221 Initial hospital inpatient care per day, typically 30 minutes	37	37	$487.31	$80.20
73030 X-ray of shoulder, minimum of 2 views	34	25	$158.07	$39.82
99202 New patient office or other outpatient visit, typically 20 minutes	32	32	$373.55	$75.17
27130 Replacement of thigh bone and hip joint with prosthesis	29	29	$11371.00	$1270.28
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	27	27	$290.25	$58.46
73630 X-ray of foot, minimum of 3 views	24	19	$162.80	$38.80
72170 X-ray of pelvis, 1-2 views	20	18	$119.57	$28.66
27447 Replacement of knee joint, both sides of knee	20	20	$6420.29	$1270.93
73521 X-ray of both hips, 2 views	18	18	$175.93	$44.10

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J7331 Hyaluronan or derivative, synojoynt, for intra-articular injection, 1 mg	3,461	54	$102.56	$14.24
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	2,696	250	$14.73	$1.07
99213 Established patient office or other outpatient visit, typically 15 minutes	629	389	$452.74	$99.02
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	577	290	$557.93	$116.33
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	322	235	$642.08	$140.13
73564 X-ray of knee, 4 or more views	168	142	$256.64	$55.85
73502 X-ray of hip, 2-3 views	163	141	$252.16	$53.90
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	113	113	$568.44	$122.67
J1030 Injection, methylprednisolone acetate, 40 mg	75	39	$31.19	$7.66
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	68	62	$290.25	$63.00
73501 X-ray of hip with pelvis, 1 view	64	48	$172.19	$36.63
72100 X-ray of lower and sacral spine, 2-3 views	60	58	$213.83	$45.93
73562 X-ray of knee, 3 views	60	55	$223.11	$47.22
J7323 Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose	44	11	$1208.00	$127.69
27130 Replacement of thigh bone and hip joint with prosthesis	39	39	$11371.00	$1364.30
73030 X-ray of shoulder, minimum of 2 views	36	24	$187.52	$40.48
27447 Replacement of knee joint, both sides of knee	33	31	$6420.29	$1364.87
72170 X-ray of pelvis, 1-2 views	31	30	$150.30	$32.30
99202 New patient office or other outpatient visit, typically 20 minutes	27	27	$373.55	$80.62
99221 Initial hospital inpatient care per day, typically 30 minutes	14	14	$487.31	$88.02

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J7331 Hyaluronan or derivative, synojoynt, for intra-articular injection, 1 mg	1,160	19	$99.27	$23.24
J1100 Injection, dexamethasone sodium phosphate, 1 mg	1,039	267	$13.92	$0.12
99213 Established patient office or other outpatient visit, typically 15 minutes	599	414	$319.66	$100.79
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	531	330	$524.54	$120.11
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	358	264	$409.88	$141.34
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	292	36	$15.00	$1.07
73502 X-ray of hip, 2-3 views	155	140	$162.50	$54.91
73564 X-ray of knee, 4 or more views	145	138	$167.86	$56.60
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	141	141	$421.03	$125.08
J7326 Hyaluronan or derivative, gel-one, for intra-articular injection, per dose	61	48	$1372.73	$1008.08
73562 X-ray of knee, 3 views	55	52	$141.15	$49.00
72100 X-ray of lower and sacral spine, 2-3 views	48	48	$155.88	$47.58
J7323 Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose	46	11	$1208.00	$131.56
73501 X-ray of hip with pelvis, 1 view	39	30	$126.94	$37.17
73565 X-ray of both knees while standing	31	31	$264.90	$48.84
73030 X-ray of shoulder, minimum of 2 views	30	27	$143.57	$44.09
27130 Replacement of thigh bone and hip joint with prosthesis	29	29	$11371.00	$1411.44
72170 X-ray of pelvis, 1-2 views	25	25	$139.00	$31.11
J1030 Injection, methylprednisolone acetate, 40 mg	25	17	$30.10	$7.19
27447 Replacement of knee joint, both sides of knee	23	23	$8187.29	$1407.13
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	23	23	$214.71	$63.90
99202 New patient office or other outpatient visit, typically 20 minutes	20	20	$317.58	$82.25
20610 Aspiration and/or injection of fluid from large joint	14	14	$255.21	$78.85

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	562	388	$300.00	$102.51
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	462	280	$532.27	$118.02
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	331	244	$378.11	$145.48
J1040 Injection, methylprednisolone acetate, 80 mg	316	227	$40.51	$10.56
73502 X-ray of hip, 2-3 views	140	125	$150.81	$54.23
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	140	140	$404.00	$126.36
73564 X-ray of knee, 4 or more views	126	123	$155.22	$55.24
J1100 Injection, dexamethasone sodium phosphate, 1 mg	111	55	$10.18	$0.12
J7323 Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose	70	16	$1208.00	$133.97
73030 X-ray of shoulder, minimum of 2 views	61	50	$140.26	$41.43
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	55	54	$186.00	$63.77
72100 X-ray of lower and sacral spine, 2-3 views	51	50	$146.00	$47.26
73562 X-ray of knee, 3 views	41	37	$129.02	$48.31
J7326 Hyaluronan or derivative, gel-one, for intra-articular injection, per dose	37	33	$1432.46	$1219.00
73501 X-ray of hip with pelvis, 1 view	34	27	$107.74	$37.12
27130 Replacement of thigh bone and hip joint with prosthesis	33	31	$11371.00	$1436.46
73565 X-ray of both knees while standing	30	30	$212.80	$48.84
J1030 Injection, methylprednisolone acetate, 40 mg	28	24	$30.00	$5.67
99202 New patient office or other outpatient visit, typically 20 minutes	26	26	$310.00	$82.86
72170 X-ray of pelvis, 1-2 views	23	22	$131.57	$31.41
73630 X-ray of foot, minimum of 3 views	23	19	$155.39	$46.13
27447 Replacement of knee joint, both sides of knee	21	20	$8797.00	$1434.61
20610 Aspiration and/or injection of fluid from large joint	12	12	$234.00	$69.99
73522 X-ray of both hips, 3-4 views	11	11	$197.45	$63.67

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	538	351	$309.07	$83.98
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	386	240	$523.87	$110.36
J1040 Injection, methylprednisolone acetate, 80 mg	345	238	$40.00	$11.48
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	238	178	$344.00	$121.96
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	126	125	$404.00	$121.00
73502 X-ray of hip, 2-3 views	112	98	$153.00	$52.58
73564 X-ray of knee, 4 or more views	107	96	$155.44	$51.26
73030 X-ray of shoulder, minimum of 2 views	56	40	$142.93	$39.41
J7323 Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose	50	15	$1197.56	$142.61
72100 X-ray of lower and sacral spine, 2-3 views	36	35	$146.00	$44.51
72170 X-ray of pelvis, 1-2 views	35	33	$138.00	$33.21
73562 X-ray of knee, 3 views	35	34	$129.00	$46.00
73501 X-ray of hip with pelvis, 1 view	33	28	$107.64	$35.68
J1030 Injection, methylprednisolone acetate, 40 mg	27	20	$30.00	$6.01
27130 Replacement of thigh bone and hip joint with prosthesis	26	25	$11371.00	$1531.12
99221 Initial hospital inpatient care per day, typically 30 minutes	20	20	$405.00	$111.67
20610 Aspiration and/or injection of fluid from large joint	20	20	$289.90	$72.11
73610 X-ray of ankle, minimum of 3 views	20	15	$121.00	$39.62
27447 Replacement of knee joint, both sides of knee	19	17	$8797.00	$1529.29
73565 X-ray of both knees while standing	17	17	$204.24	$45.81
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	17	17	$186.00	$49.37
J7326 Hyaluronan or derivative, gel-one, for intra-articular injection, per dose	15	14	$1359.00	$1195.32
73630 X-ray of foot, minimum of 3 views	14	11	$118.00	$38.32

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	457	317	$344.00	$120.68
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	411	272	$533.90	$107.80
J1040 Injection, methylprednisolone acetate, 80 mg	329	252	$17.39	$10.28
99213 Established patient office or other outpatient visit, typically 15 minutes	321	261	$237.53	$82.66
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	167	167	$404.00	$119.87
73564 X-ray of knee, 4 or more views	152	134	$164.30	$51.20
73502 X-ray of hip, 2-3 views	123	111	$153.00	$49.31
J7323 Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose	98	35	$392.00	$141.86
73030 X-ray of shoulder, minimum of 2 views	55	48	$135.49	$34.12
73562 X-ray of knee, 3 views	48	42	$131.69	$44.09
27130 Replacement of thigh bone and hip joint with prosthesis	37	37	$11371.00	$1520.33
72100 X-ray of lower and sacral spine, 2-3 views	37	37	$146.00	$42.13
J1030 Injection, methylprednisolone acetate, 40 mg	33	29	$12.42	$6.32
73501 X-ray of hip with pelvis, 1 view	32	27	$111.00	$35.61
73610 X-ray of ankle, minimum of 3 views	30	25	$121.00	$38.61
99202 New patient office or other outpatient visit, typically 20 minutes	26	26	$310.00	$85.46
72170 X-ray of pelvis, 1-2 views	25	24	$132.48	$36.65
27447 Replacement of knee joint, both sides of knee	25	25	$8797.00	$1519.49
20610 Aspiration and/or injection of fluid from large joint	21	17	$316.38	$67.35
73630 X-ray of foot, minimum of 3 views	20	20	$118.00	$36.06
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	16	14	$186.00	$50.78
99221 Initial hospital inpatient care per day, typically 30 minutes	11	11	$405.00	$109.76

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	388	257	$344.00	$119.00
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	320	193	$527.08	$105.18
J1040 Injection, methylprednisolone acetate, 80 mg	267	179	$10.00	$9.84
99213 Established patient office or other outpatient visit, typically 15 minutes	219	173	$237.00	$80.58
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	120	120	$404.00	$119.69
73562 X-ray of knee, 3 views	105	86	$126.54	$40.41
73502 X-ray of hip, 2-3 views	101	93	$153.00	$47.70
J7323 Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose	65	18	$262.00	$143.76
73030 X-ray of shoulder, minimum of 2 views	45	38	$134.93	$32.90
72100 X-ray of lower and sacral spine, 2-3 views	35	35	$146.00	$40.14
73564 X-ray of knee, 4 or more views	33	30	$154.00	$45.56
99202 New patient office or other outpatient visit, typically 20 minutes	30	30	$310.00	$83.50
27130 Replacement of thigh bone and hip joint with prosthesis	27	27	$11371.00	$1511.61
73630 X-ray of foot, minimum of 3 views	25	20	$118.00	$33.74
J1030 Injection, methylprednisolone acetate, 40 mg	23	16	$10.00	$6.66
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	22	20	$186.00	$49.18
73610 X-ray of ankle, minimum of 3 views	22	15	$121.00	$36.22
73501 X-ray of hip with pelvis, 1 view	21	18	$105.71	$32.90
27447 Replacement of knee joint, both sides of knee	15	15	$8797.00	$1509.99
72170 X-ray of pelvis, 1-2 views	14	14	$138.00	$36.62
99218 Hospital observation care typically 30 minutes	12	12	$368.00	$107.59

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	365	234	$308.33	$116.32
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	269	188	$403.88	$102.41
J1040 Injection, methylprednisolone acetate, 80 mg	226	172	$10.00	$9.84
99213 Established patient office or other outpatient visit, typically 15 minutes	177	146	$208.98	$79.48
73562 X-ray of knee, 3 views	128	111	$133.50	$41.60
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	128	128	$356.19	$117.26
73502 X-ray of hip, 2-3 views	84	77	$149.85	$46.09
J7323 Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose	50	15	$262.00	$152.00
72100 X-ray of lower and sacral spine, 2-3 views	35	35	$143.94	$39.57
73030 X-ray of shoulder, minimum of 2 views	33	33	$143.00	$32.80
27130 Replacement of thigh bone and hip joint with prosthesis	32	32	$11155.75	$1463.37
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	23	22	$156.65	$48.13
27447 Replacement of knee joint, both sides of knee	22	20	$8172.41	$1462.90
J1030 Injection, methylprednisolone acetate, 40 mg	19	13	$10.00	$5.57
72170 X-ray of pelvis, 1-2 views	19	19	$138.63	$36.13
73501 X-ray of hip with pelvis, 1 view	18	17	$109.33	$33.60
73630 X-ray of foot, minimum of 3 views	18	13	$120.33	$32.88
99202 New patient office or other outpatient visit, typically 20 minutes	18	18	$284.00	$81.72
73610 X-ray of ankle, minimum of 3 views	17	15	$121.71	$35.72
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$498.45	$176.35

Medical Specialties & State Licenses

CMS Verified: 2026-07-06

Orthopaedic Surgery Primary Specialty

NUCC Taxonomy Code: 207X00000X

State License MA 152993

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

Hospital & Practice Group Affiliations

Orthopedic Surgery, Inc

92 Montvale Ave, Stoneham, MA 021803629

Phone: 7812797040

Secondary Practice Locations

405 Pearl St

Malden, MA 021486644

Phone: 7816659500

44 Bearfoot Rd Ste 3125

Northborough, MA 015321559

Phone: 7812797040

362 Belmont St

Brockton, MA 023014950

Phone: 7812797040

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

29 Associated Practitioners

Dr. Robert Waugh , MD

Orthopaedic Surgery

NPI 1003950569

Doctor of Medicine (M.D.)

Kimberly Tighe , PA

Physician Assistant

NPI 1093080830

Physician Assistant

Dr. Abraham Shurland , MD

Orthopaedic Surgery - Sports Medicine

NPI 1144214032

Doctor of Medicine (M.D.)

Maria Chorzewski , PT

Physical Therapist

NPI 1215245899

Physical Therapist

Dr. Denis Byrne , MD

Specialist

NPI 1215921309

Doctor of Medicine (M.D.)

Andrew Pellechia , PA

Physician Assistant

NPI 1265092423

Physician Assistant

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

7 Historical Events

📍

Updated Practice Location July 14, 2021

Registered at 92 MONTVALE AVE, STONEHAM, MA 021803647 (Tel: 7812797040)

✅

NPI Profile Active August 09, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location August 09, 2016

Registered at 405 PEARL ST, MALDEN, MA 021486644 (Tel: 7816659500)

📍

Updated Business Mailing Address August 09, 2016

Registered at 92 MONTVALE AVE, STE 1400, STONEHAM, MA 021803629 (Tel: 7812797040)

👤

Provider Name / Credentials Updated August 09, 2016

Recorded as EVAN ZAHNER, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) August 09, 2016

Orthopaedic Surgery (License #152993 in MA)

🟢

Initial NPI Registration & Enumeration May 30, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1154378479

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: May 30, 2006

Last Update: July 06, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

92 Montvale Ave, Ste 1400

Stoneham, MA 021803629

Phone: 7812797040

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.