Active NPI 1669546834 Individual Practitioner Male Practitioner

Dr. Michael Steven Grenis , MD

Orthopaedic Surgery • Princeton, NJ

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Michael Grenis, MD is a certified Orthopaedic Surgery practicing in Princeton, NJ. With approximately 42 years of clinical experience since graduating from New York Medical College in 1984, Dr. Grenis delivers high-quality medical care to the local community at 325 PRINCETON AVE.

Dr. Grenis maintains professional affiliations with Orthonj Llc, Phoenix Rehabilitation And Health Services Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include injection, methylprednisolone acetate, 1 mg, established patient outpatient office visit, injection into tendon or ligament. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

325 Princeton Ave

Princeton, NJ 085401617

Telephone 6099248131

Fax 6099248532

Associated Practice Facility / Clinic

🏢 Princeton Orthopaedic Associates Ii P.a. Facility NPI 1366473852

Medicare Profile & Education

Medical School

New York Medical College

Graduation Year

1984

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Orthopaedic Surgery in Princeton, NJ

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

42 Yrs +14.7 yrs vs City Avg

City Avg: 27.3 Yrs

State Avg: 27.4 Yrs

Regional Practice Density

27 Specialists

Practicing in Princeton, NJ (746 Statewide)

Telehealth Adoption Rate

3.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

86.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Grenis (42 Years) 42 Yrs

Princeton Specialty Average (27.3 Years) 27.3 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	8,450	240	$0.51	$0.13
99213 Established patient office or other outpatient visit, typically 15 minutes	647	413	$254.83	$104.27
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	436	416	$364.57	$147.14
20550 Injection into tendon or ligament	226	160	$246.41	$66.42
73130 X-ray of hand, minimum of 3 views	182	140	$161.79	$43.92
73110 X-ray of wrist, minimum of 3 views	182	109	$181.43	$48.98
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	137	137	$364.61	$127.12
20600 Aspiration and/or injection of fluid from small joint	102	78	$284.86	$61.36
73140 X-ray of finger, minimum of 2 views	96	74	$167.14	$45.64
J1030 Injection, methylprednisolone acetate, 40 mg	67	57	$6.47	$6.20
73080 X-ray of elbow, minimum of 3 views	56	46	$145.00	$38.93
64721 Release and/or relocation of hand nerve	37	34	$5954.05	$486.17
20526 Injection of carpal tunnel	37	28	$355.04	$100.92
29075 Application of elbow to finger cast	29	26	$992.00	$104.40
Q4010 Cast supplies, short arm cast, adult (11 years +), fiberglass	28	25	$30.00	$23.36
20605 Aspiration and/or injection of medium joint or joint capsule	20	18	$292.64	$64.01
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	14	14	$553.05	$181.50
26440 Removal of scar tissue to release tendon of palm or finger	12	11	$6982.42	$752.08

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	546	319	$255.21	$98.30
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	261	244	$368.00	$137.13
73110 X-ray of wrist, minimum of 3 views	194	104	$183.00	$46.86
J1030 Injection, methylprednisolone acetate, 40 mg	177	131	$6.67	$6.27
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	177	68	$19.74	$1.06
97110 Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes	147	48	$139.00	$26.25
20550 Injection into tendon or ligament	126	94	$249.04	$61.97
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	122	122	$365.05	$121.54
73130 X-ray of hand, minimum of 3 views	114	86	$164.00	$42.16
73140 X-ray of finger, minimum of 2 views	86	60	$168.00	$43.49
20600 Aspiration and/or injection of fluid from small joint	84	59	$288.04	$59.21
97140 Therapy procedure using manual technique, each 15 minutes	63	47	$128.00	$21.88
73080 X-ray of elbow, minimum of 3 views	51	32	$145.00	$37.17
29075 Application of elbow to finger cast	39	38	$992.00	$99.51
Q4010 Cast supplies, short arm cast, adult (11 years +), fiberglass	36	35	$30.00	$22.77
20526 Injection of carpal tunnel	28	21	$373.93	$92.56
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	24	24	$454.00	$139.16
64721 Release and/or relocation of hand nerve	18	18	$6050.00	$450.51
97112 Therapy procedure to re-educate brain-to-nerve-to-muscle function, each 15 minutes	15	13	$161.00	$29.15

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	508	282	$254.67	$99.42
97110 Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes	323	81	$139.00	$26.61
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	211	195	$368.00	$140.68
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	193	149	$17.17	$1.14
73110 X-ray of wrist, minimum of 3 views	192	96	$183.00	$46.69
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	142	142	$365.05	$124.38
97140 Therapy procedure using manual technique, each 15 minutes	121	71	$128.00	$22.46
20550 Injection into tendon or ligament	96	79	$249.04	$64.43
73130 X-ray of hand, minimum of 3 views	85	70	$164.00	$43.07
20600 Aspiration and/or injection of fluid from small joint	57	42	$288.04	$60.26
73140 X-ray of finger, minimum of 2 views	42	34	$168.00	$44.46
Q4010 Cast supplies, short arm cast, adult (11 years +), fiberglass	33	32	$30.61	$20.41
29075 Application of elbow to finger cast	33	32	$992.00	$95.80
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	28	28	$454.00	$145.01
73080 X-ray of elbow, minimum of 3 views	27	22	$145.00	$38.36
64721 Release and/or relocation of hand nerve	27	25	$6050.00	$472.17
20526 Injection of carpal tunnel	25	20	$375.48	$93.26
97112 Therapy procedure to re-educate brain-to-nerve-to-muscle function, each 15 minutes	15	15	$161.00	$36.92
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$553.05	$184.11

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	433	260	$242.44	$100.50
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	227	216	$357.00	$143.02
J1030 Injection, methylprednisolone acetate, 40 mg	182	131	$6.30	$5.16
73110 X-ray of wrist, minimum of 3 views	131	76	$173.52	$47.45
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	110	110	$343.55	$124.75
73130 X-ray of hand, minimum of 3 views	108	82	$156.74	$42.56
20550 Injection into tendon or ligament	106	74	$242.33	$63.14
20600 Aspiration and/or injection of fluid from small joint	49	37	$278.92	$57.53
73080 X-ray of elbow, minimum of 3 views	47	38	$136.06	$36.28
73140 X-ray of finger, minimum of 2 views	45	33	$163.31	$43.61
97110 Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes	38	16	$115.55	$27.05
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	25	23	$16.82	$1.20
20526 Injection of carpal tunnel	24	18	$339.71	$97.50
29075 Application of elbow to finger cast	20	20	$858.95	$99.80
64721 Release and/or relocation of hand nerve	19	16	$5757.89	$463.04
97140 Therapy procedure using manual technique, each 15 minutes	18	16	$102.17	$23.25
73030 X-ray of shoulder, minimum of 2 views	16	14	$155.00	$39.88
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	15	15	$553.05	$185.89
20610 Aspiration and/or injection of fluid from large joint	14	11	$354.04	$72.46
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	12	12	$454.00	$147.74
Q4010 Cast supplies, short arm cast, adult (11 years +), fiberglass	12	12	$30.00	$20.40

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	362	215	$89.45	$82.07
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	188	177	$129.15	$119.25
J1030 Injection, methylprednisolone acetate, 40 mg	176	115	$6.64	$5.92
73110 X-ray of wrist, minimum of 3 views	114	65	$45.61	$44.38
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	80	80	$133.69	$119.18
73130 X-ray of hand, minimum of 3 views	79	60	$40.63	$39.29
20550 Injection into tendon or ligament	74	55	$71.12	$59.67
97110 Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes	46	15	$40.00	$27.70
20600 Aspiration and/or injection of fluid from small joint	45	31	$64.69	$55.24
73080 X-ray of elbow, minimum of 3 views	36	21	$41.39	$35.42
20526 Injection of carpal tunnel	29	21	$105.07	$88.77
73140 X-ray of finger, minimum of 2 views	25	24	$40.00	$39.96
Q4010 Cast supplies, short arm cast, adult (11 years +), fiberglass	21	21	$30.00	$20.13
29075 Application of elbow to finger cast	21	21	$105.00	$98.34
97140 Therapy procedure using manual technique, each 15 minutes	20	16	$37.18	$23.69
64721 Release and/or relocation of hand nerve	19	19	$610.58	$455.55
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	17	17	$127.06	$74.01
73030 X-ray of shoulder, minimum of 2 views	14	11	$40.00	$38.21
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$230.01	$168.82
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	11	11	$155.00	$150.86

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	388	219	$87.23	$80.70
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	219	201	$126.22	$118.42
J1030 Injection, methylprednisolone acetate, 40 mg	182	136	$7.13	$6.17
73110 X-ray of wrist, minimum of 3 views	117	66	$45.00	$41.34
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	95	95	$133.11	$117.40
20550 Injection into tendon or ligament	88	73	$74.14	$58.29
73130 X-ray of hand, minimum of 3 views	71	48	$40.76	$37.31
20600 Aspiration and/or injection of fluid from small joint	48	35	$71.15	$49.90
73080 X-ray of elbow, minimum of 3 views	41	25	$40.00	$33.87
73140 X-ray of finger, minimum of 2 views	34	28	$40.00	$38.64
29075 Application of elbow to finger cast	27	25	$105.00	$96.66
Q4010 Cast supplies, short arm cast, adult (11 years +), fiberglass	24	22	$30.00	$19.72
20526 Injection of carpal tunnel	24	18	$105.07	$84.96
26440 Removal of scar tissue to release tendon of palm or finger	21	12	$848.78	$545.87
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	20	17	$120.75	$74.17
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	18	17	$161.11	$145.65
64721 Release and/or relocation of hand nerve	17	15	$500.00	$447.20

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	440	244	$98.00	$78.79
J1030 Injection, methylprednisolone acetate, 40 mg	182	126	$7.27	$6.40
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	175	165	$141.77	$117.13
73110 X-ray of wrist, minimum of 3 views	154	82	$49.00	$39.58
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	128	128	$146.73	$117.80
20550 Injection into tendon or ligament	93	70	$76.84	$57.86
73130 X-ray of hand, minimum of 3 views	55	40	$42.74	$36.02
73080 X-ray of elbow, minimum of 3 views	47	30	$44.79	$35.05
20600 Aspiration and/or injection of fluid from small joint	41	28	$71.00	$52.81
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	34	34	$202.47	$143.43
73140 X-ray of finger, minimum of 2 views	32	24	$44.25	$35.93
64721 Release and/or relocation of hand nerve	29	24	$570.14	$438.59
29075 Application of elbow to finger cast	27	23	$117.10	$97.53
73030 X-ray of shoulder, minimum of 2 views	27	18	$40.46	$33.18
Q4010 Cast supplies, short arm cast, adult (11 years +), fiberglass	24	21	$30.00	$19.29
20610 Aspiration and/or injection of fluid from large joint	20	17	$97.13	$64.12
20605 Aspiration and/or injection of medium joint or joint capsule	18	14	$74.83	$48.96
27245 Treatment of broken neck of thigh bone with bone implant	15	15	$2689.77	$1291.24
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	15	13	$118.23	$74.88
73221 Mri scan of arm joint without contrast	11	11	$327.19	$200.05

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	342	204	$84.14	$79.14
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	154	149	$122.14	$116.66
73110 X-ray of wrist, minimum of 3 views	102	57	$41.41	$40.24
J1030 Injection, methylprednisolone acetate, 40 mg	100	76	$5.52	$5.42
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	92	92	$121.24	$118.08
73130 X-ray of hand, minimum of 3 views	67	49	$35.90	$34.66
20550 Injection into tendon or ligament	54	41	$61.46	$57.86
73080 X-ray of elbow, minimum of 3 views	41	28	$35.42	$34.40
20600 Aspiration and/or injection of fluid from small joint	35	31	$64.69	$57.10
73140 X-ray of finger, minimum of 2 views	26	19	$36.95	$35.76
73030 X-ray of shoulder, minimum of 2 views	22	14	$33.73	$32.70
J1020 Injection, methylprednisolone acetate, 20 mg	21	20	$4.00	$3.95
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	20	20	$204.72	$138.38
29075 Application of elbow to finger cast	20	18	$103.97	$96.27
20610 Aspiration and/or injection of fluid from large joint	19	13	$68.21	$66.41
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	19	19	$392.12	$196.17
Q4010 Cast supplies, short arm cast, adult (11 years +), fiberglass	18	16	$25.00	$19.07
27245 Treatment of broken neck of thigh bone with bone implant	13	13	$1858.95	$1254.30
64721 Release and/or relocation of hand nerve	13	12	$490.37	$461.15

Medical Specialties & State Licenses

Orthopaedic Surgery Primary Specialty

NUCC Taxonomy Code: 207X00000X

State License NJ 25MA05473100

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.

Orthopaedic Surgery

NUCC Taxonomy Code: 207X00000X

State License PA MD442362

Hospital & Practice Group Affiliations

Phoenix Rehabilitation And Health Services Inc

2000 Westinghouse Dr, Cranberry Township, PA 160665238

Phoenix Rehabilitation And Health Services Inc

2000 Westinghouse Dr, Cranberry Twp, PA 160665238

Orthonj Llc

325 Princeton Ave, Princeton, NJ 085401617

Phone: 6099248131

Practice Associates & Co-Workers

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

40 Associated Practitioners

Dr. David Kittle , PT, DPT

Physical Therapist

NPI 1003199837

Physical Therapist, Doctor of Physical Therapy

Dr. David Lamb , MD

Orthopaedic Surgery

NPI 1023037959

Doctor of Medicine (M.D.)

Dr. Kartik Shenoy , MD

Orthopaedic Surgery - Orthopaedic Surgery of the Spine

NPI 1043621824

Doctor of Medicine (M.D.)

Dr. Michael Biagioli , DPT

Physical Therapist

NPI 1043737158

Doctor of Physical Therapy

Dr. Jonathan Haskel , MD

Orthopaedic Surgery

NPI 1043744915

Doctor of Medicine (M.D.)

Marcelle Zebuhr , PA-C

Physician Assistant

NPI 1053326827

Physician Assistant (Certified)

Career & Practice History Timeline

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

7 Historical Events

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) September 30, 2019

Orthopaedic Surgery (License #MD442362 in PA)

✅

NPI Profile Active March 06, 2015

NPI status registered as active in NPPES database

📍

Updated Practice Location March 06, 2015

Registered at 325 PRINCETON AVE, PRINCETON, NJ 085401617 (Tel: 6099248131)

📍

Updated Business Mailing Address March 06, 2015

Registered at 325 PRINCETON AVE, PRINCETON, NJ 085401617 (Tel: 6099248131)

👤

Provider Name / Credentials Updated March 06, 2015

Recorded as MICHAEL GRENIS, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 06, 2015

Orthopaedic Surgery (License #25MA05473100 in NJ)

🟢

Initial NPI Registration & Enumeration November 20, 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: 1669546834

Entity Type:

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

Enumeration Date: November 20, 2006

Last Update: September 30, 2019

Sole Proprietor: No

Update or Correct Profile

Mailing Address

325 Princeton Ave

Princeton, NJ 085401617

Phone: 6099248131

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.