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Dr. Ari C. Greis, DO

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(Ari C. Greis, D.O.)

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Specializes in: Orthopedics/Orthopedic Surgery, Physiatry (Physical Medicine & Rehabilitation) and General Practice

Philadelphia College of Osteopathic Medicine

234 Mall Boulevard Suite G-30
King of Prussia, PA 19406

1-800-321-9999

Dr. Ari C. Greis, DO is an orthopedist in King of Prussia, PA specializing in orthopedics/orthopedic surgery, physiatry (physical medicine & rehabilitation) and general practice. He graduated from Philadelphia College of Osteopathic Medicine. Dr. Ari C. Greis, DO is affiliated with Main Line Health, PHOENIX REHABILITATION AND HEALTH SERVICES INC, RECONSTRUCTIVE ORTHOPAEDIC ASSOCIATES II LLC and Rothman Orthopaedics.

Office Locations

234 Mall Boulevard Suite G-30
King of Prussia, PA 19406

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825 Old Lancaster Road Suite 100, 140 and 200
Bryn Mawr, PA 19010

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In The News (see more mentions in the news)

“Her doctor, Dr. Ari Greis, is the director of the Medical Cannabis Department at the Rothman Orthopaedic Institute.”—"Philadelphia-area doctor recommends patients use medical marijuana for pain relief as safer alternative to opioids", CBS News, October 2025

“Additional study authors were Bryan Renslo, MD, Ari Greis, DO, Conan S Liu, MD, Anjithaa Radakrishnan, MD, of the Department of Medical Cannabis and Sidney Kimmel Medical College at Thomas...”—"Study Shows Medical Cannabis Use Reduces Opioid Prescriptions in Patients with Osteoarthritis", Channel 8 News, February 2024

“However, a co-author of both studies, Ari Greis, DO, of Rothman Orthopedic Institute at Thomas Jefferson University in Philadelphia, told MedPage Today that the findings suggest that "cannabinoids...”—"Cannabis Linked to Less Opioid Use in Back Pain, Osteoarthritis", MedPage Today, March 2022

Noteworthy Medicare Patient Procedures Performed by Dr. Ari C. Greis, DO in 2023

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 25%

By Volume:

nerve block

nerve block for pain

spinal procedures

By Affordability:

electrodiagnostic testing

electrophysiological study

nerve conduction studies

In 2012, among providers in related specialties within Pennsylvania, Dr. Ari C. Greis, DO performed more nerve block, nerve block for pain, and spinal procedures procedures for Medicare patients than 75% of them and he also had a list price for electrodiagnostic testing, electrophysiological (EP) study, and nerve conduction studies (NCS) that was lower than the list prices billed to Medicare by 75% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2012 were injections, spinal procedures, pain management and nerve block.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	63
diagnostic procedures	140
doctor visit	761
hip imaging	12
injections	322
musculoskeletal imaging	12
nerve block	247
pain management	259
spinal procedures	270
X-rays	23

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2013 were injections, pain management, spinal procedures and nerve block.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	57
diagnostic procedures	40
doctor visit	868
injections	353
nerve block	283
pain management	296
spinal procedures	296

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	235
Female	383

**Ethnicity**
Non-Hispanic White	572
Black	29
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	315
From 75 to 84	186
85 and over	63
Less than 65	54

Conditions of Medicare patients treated by Dr. Ari C. Greis, DO in 2013

Hypertension	68
High Cholesterol	65
Stroke	5
Ischemic Heart Disease	33
Depression	23
Chronic Kidney Disease	15
Asthma	10
Osteoperosis	12
Atrial Fibrilation	9
Heart Failure	11
Chronic Obstructive Pulmonary Disease	9
Diabetes	23
Dementia	7
Cancer	11

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2014 were injections, nerve block, pain management and spinal procedures.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	62
diagnostic procedures	18
doctor visit	984
injections	352
nerve block	290
pain management	290
spinal procedures	290

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	275
Female	385

**Ethnicity**
Non-Hispanic White	590
Black	32
Hispanic	0
Asian	0
Other	19
Native American	0

**Age**
From 65 to 74	350
From 75 to 84	189
85 and over	67
Less than 65	54

Conditions of Medicare patients treated by Dr. Ari C. Greis, DO in 2014

Hypertension	70
High Cholesterol	67
Stroke	5
Ischemic Heart Disease	36
Depression	20
Chronic Kidney Disease	13
Asthma	9
Osteoperosis	14
Atrial Fibrilation	12
Heart Failure	10
Chronic Obstructive Pulmonary Disease	9
Diabetes	24
Dementia	5
Cancer	12

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2015 were injections, spinal procedures, pain management and nerve block.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	86
diagnostic procedures	22
doctor visit	992
injections	461
nerve block	361
pain management	375
spinal procedures	412
X-rays	37

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	570
Female	828

**Ethnicity**
Non-Hispanic White	1262
Black	76
Hispanic	0
Asian	0
Other	32
Native American	0

**Age**
From 65 to 74	746
From 75 to 84	398
85 and over	124
Less than 65	130

Conditions of Medicare patients treated by Dr. Ari C. Greis, DO in 2015

Hypertension	63
High Cholesterol	63
Stroke	4
Ischemic Heart Disease	32
Depression	22
Chronic Kidney Disease	15
Asthma	10
Osteoperosis	10
Atrial Fibrilation	10
Heart Failure	8
Chronic Obstructive Pulmonary Disease	8
Diabetes	25
Dementia	6
Cancer	11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2016 were spinal procedures, injections, pain management and nerve block.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	71
diagnostic procedures	62
doctor visit	1064
injections	366
musculoskeletal imaging	15
nerve block	279
pain management	295
spinal procedures	426
X-rays	146

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	315
Female	462

**Ethnicity**
Non-Hispanic White	696
Black	46
Hispanic	0
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	400
From 75 to 84	255
85 and over	65
Less than 65	57

Conditions of Medicare patients treated by Dr. Ari C. Greis, DO in 2016

Hypertension	67
High Cholesterol	64
Stroke	4
Ischemic Heart Disease	33
Depression	20
Chronic Kidney Disease	20
Asthma	14
Osteoperosis	13
Atrial Fibrilation	9
Heart Failure	9
Chronic Obstructive Pulmonary Disease	8
Diabetes	25
Dementia	7
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2017 were spinal procedures, injections, X-rays and pain management.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	64
diagnostic procedures	67
doctor visit	1108
injections	222
nerve block	137
pain management	158
spinal procedures	329
X-rays	171

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	338
Female	517

**Ethnicity**
Non-Hispanic White	768
Black	47
Hispanic	0
Asian	0
Other	24
Native American	0

**Age**
From 65 to 74	448
From 75 to 84	257
85 and over	92
Less than 65	58

Conditions of Medicare patients treated by Dr. Ari C. Greis, DO in 2017

Hypertension	62
High Cholesterol	53
Stroke	4
Ischemic Heart Disease	33
Depression	23
Chronic Kidney Disease	21
Asthma	8
Osteoperosis	14
Atrial Fibrilation	11
Heart Failure	11
Chronic Obstructive Pulmonary Disease	7
Diabetes	22
Dementia	8
Cancer	13

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2018 were injections, spinal procedures, nerve block and pain management.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	55
diagnostic procedures	44
doctor visit	979
injections	156
nerve block	101
pain management	101
spinal procedures	145
X-rays	44

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	288
Female	446

**Ethnicity**
Non-Hispanic White	652
Black	46
Hispanic	0
Asian	0
Other	24
Native American	0

**Age**
From 65 to 74	377
From 75 to 84	245
85 and over	82
Less than 65	30

Conditions of Medicare patients treated by Dr. Ari C. Greis, DO in 2018

Hypertension	64
High Cholesterol	65
Stroke	4
Ischemic Heart Disease	29
Depression	21
Chronic Kidney Disease	20
Asthma	8
Osteoperosis	14
Atrial Fibrilation	11
Heart Failure	10
Chronic Obstructive Pulmonary Disease	9
Diabetes	20
Dementia	8
Cancer	12

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2019 were injections, nerve block, pain management and spinal procedures.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	65
diagnostic procedures	48
doctor visit	1015
injections	211
nerve block	146
pain management	146
spinal procedures	146

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	308
Female	464

**Ethnicity**
Non-Hispanic White	678
Black	48
Hispanic	0
Asian	0
Other	32
Native American	0

**Age**
From 65 to 74	416
From 75 to 84	247
85 and over	79
Less than 65	30

Conditions of Medicare patients treated by Dr. Ari C. Greis, DO in 2019

Hypertension	65
High Cholesterol	70
Stroke	5
Ischemic Heart Disease	34
Depression	24
Chronic Kidney Disease	25
Asthma	9
Osteoperosis	16
Atrial Fibrilation	12
Heart Failure	11
Chronic Obstructive Pulmonary Disease	10
Diabetes	21
Dementia	10
Cancer	16

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2020 were injections, spinal procedures, nerve block and pain management.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	16
diagnostic procedures	14
doctor visit	680
injections	141
nerve block	125
pain management	125
spinal procedures	137
X-rays	12

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	234
Female	321

**Ethnicity**
Non-Hispanic White	491
Black	32
Hispanic	0
Asian	0
Other	19
Native American	0

**Age**
From 65 to 74	282
From 75 to 84	185
85 and over	55
Less than 65	33

Conditions of Medicare patients treated by Dr. Ari C. Greis, DO in 2020

Hypertension	62
High Cholesterol	64
Stroke	3
Ischemic Heart Disease	31
Depression	23
Chronic Kidney Disease	24
Asthma	7
Osteoperosis	14
Atrial Fibrilation	10
Heart Failure	10
Chronic Obstructive Pulmonary Disease	8
Diabetes	21
Dementia	8
Cancer	14

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2021 were spinal procedures, injections, nerve block and pain management.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	15
diagnostic procedures	43
doctor visit	663
injections	146
nerve block	131
pain management	131
spinal procedures	150
X-rays	19

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	234
Female	331

**Ethnicity**
Non-Hispanic White	491
Black	35
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	268
From 75 to 84	213
85 and over	62
Less than 65	22

Conditions of Medicare patients treated by Dr. Ari C. Greis, DO in 2021

Hypertension	66
High Cholesterol	72
Stroke	4
Ischemic Heart Disease	36
Depression	24
Chronic Kidney Disease	25
Asthma	8
Osteoperosis	18
Atrial Fibrilation	12
Heart Failure	10
Chronic Obstructive Pulmonary Disease	10
Diabetes	19
Dementia	7
Cancer	15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA during 2022 were injections, spinal procedures, pain management and nerve block.

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

aspiration	33
diagnostic procedures	69
doctor visit	567
injections	179
nerve block	131
pain management	146
spinal procedures	165
X-rays	19

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	202
Female	326

**Ethnicity**
Non-Hispanic White	458
Black	32
Hispanic	0
Asian	0
Other	23
Native American	0

**Age**
From 65 to 74	239
From 75 to 84	225
85 and over	53
Less than 65	11

Conditions of Medicare patients treated by Dr. Ari C. Greis, DO in 2022

Hypertension	75
High Cholesterol	75
Stroke	7
Ischemic Heart Disease	30
Depression	24
Chronic Kidney Disease	20
Asthma	13
Osteoperosis	26
Atrial Fibrilation	14
Heart Failure	8
Chronic Obstructive Pulmonary Disease	12
Diabetes	22
Dementia	3
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Ari C. Greis, DO for Medicare patients.

The highest averages for the top procedures that Dr. Ari C. Greis, DO treated as an orthopedist in King of Prussia, PA were injections, spinal procedures, pain management and nerve block.

aspiration	53
diagnostic procedures	51
doctor visit	880
hip imaging	12
injections	264
musculoskeletal imaging	13
nerve block	202
pain management	211
spinal procedures	251
X-rays	58

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Ari C. Greis, DO.

**Gender**
Male	272
Female	405

**Ethnicity**
Black / African American	38
Asian / Pacific Islander	0
Non-Hispanic White	605
Native American / Alaskan Native	0
Hispanic	0
Other	17

**Age**
75 to 84	218
85 and over	67
Less than 65	43
65 to 74	349

Average of Total of Conditions of Medicare patients treated by Dr. Ari C. Greis, DO From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Ari C. Greis, DO treated were hypertension, high cholesterol, ischemic heart disease and depression.

Hypertension	60
High Cholesterol	59
Stroke	4
Ischemic Heart Disease	29
Depression	20
Chronic Kidney Disease	18
Asthma	8
Osteoporosis	13
Heart Failure	8
Chronic Obstructive Pulmonary Disease	8
Diabetes	20
Atrial Fibrillation	10
Dementia	6
Cancer	12

Education & Training

Dr. Ari C. Greis, DO graduated from Philadelphia College of Osteopathic Medicine. He completed residency at University of Washington Affiliated Hospitals. He has a state license in New Jersey.

Medical School: Philadelphia College of Osteopathic Medicine

Residency: University of Washington Affiliated Hospitals

Licensed In: New Jersey

Affiliations & Hospitals

Dr. Ari C. Greis, DO is associated with these hospitals and organizations:

Main Line Health

PHOENIX REHABILITATION AND HEALTH SERVICES INC

RECONSTRUCTIVE ORTHOPAEDIC ASSOCIATES II LLC

Rothman Orthopaedics

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Ari C. Greis, DO appears to accept the following insurance providers: Tricare, Cigna, Aetna, Horizon Blue Cross, UHC, Medicare, Humana, VA, NYSHIP, UPMC, Idependence Blue Cross, Berkshire and Loomis.

Insurance Accepted by Provider includes:

According to our sources, Dr. Ari C. Greis, DO accepts the following insurance providers:

Tricare

Cigna

Aetna

Horizon Blue Cross

UHC

Medicare

Humana

NYSHIP

UPMC

Idependence Blue Cross

Berkshire

Loomis

Ratings & Reviews

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General Payments

These charts describe general payments received by Dr. Ari C. Greis, DO. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Depomed, Inc.	$207 Gralise $207
DePuy Synthes Sales Inc.	$152 ORTHOVISC $110	MONOVISC $27	PEAK $15
Mallinckrodt LLC	$46 Pennsaid Topical Solution $18	Pennsaid 2 percent Topical Solution $16	Exalgo $12
Nevro Corp.	$30 Senza Spinal Cord Stimulation System $30
Pfizer Inc.	$27 CELEBREX $15	FLECTOR PATCH $12
Other	$95 STRAVIX $22	RS2M/AVIVASTIM $22	VIMOVO $15	OPANA ER $12	EUFLEXXA $12	Other $13

**Types of Payments**
Food and Beverage	$556
Education	$2

Biography

Dr. Ari Greis works as a physiatry (physical medicine & rehabilitation), general practice, and orthopedics/orthopedic surgery. He obtained his medical school training at Philadelphia College of Osteopathic Medicine and performed his residency at a hospital affiliated with the University of Washington. Dr. Greis can accept Blue California, Cigna, and Humana, as well as other insurance carriers. He is professionally affiliated with Main Line Health. He has an open panel in King of Prussia, PA according to Yext.