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Dr. Robert F. Onder Jr., MD

(5 Ratings)

Specializes in: Adult Allergy & Immunology

Washington University in St. Louis School of Medicine

711 Old Ballas Road Suite 100
Saint Louis, MO 63141

(314) 569-0510

Dr. Robert F. Onder Jr., MD is an allergist in Saint Louis, MO specializing in adult allergy & immunology. He graduated from Washington University in St. Louis School of Medicine. Dr. Robert F. Onder Jr., MD is affiliated with Mercy Health System and Mercy Hospital St. Louis.

Office Locations

Mercy Hospital St. Louis

711 Old Ballas Road Suite 100
Saint Louis, MO 63141

(314) 569-0510

(314) 569-1085

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In The News (see more mentions in the news)

“Missouri District 3: Bob Onder, MD, JD (R), an allergist and a lawyer, beat his opponent, technology specialist Bethany Mann (D), by a margin of 61% to...”—"Mixed Bag for Clinicians Vying for House Seats", MedPage Today, November 2024

“Former state Sen. Bob Onder of O'Fallon, a candidate for Congress in the 3rd District, speaks Thursday evening at the Boone County Republican Lincoln Days dinner in Columbia (Rudi Keller/Missouri...”—"Bob Onder defeats Kurt Schaefer to win GOP nomination in 3rd Congressional District * Missouri Independent", Missouri Independent, August 2024

“Former Republican legislator Bob Onder jumps into congressional race.”—"Former Republican legislator Bob Onder jumps into congressional race * Missouri Independent", Missouri Independent, February 2024

Noteworthy Medicare Patient Procedures Performed by Dr. Robert F. Onder Jr., MD in 2024

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

Top 10%

By Volume:

subcutaneous allergen immunotherapy

In 2024, Dr. Robert F. Onder Jr., MD performed more subcutaneous allergen immunotherapy (allergy shots) procedures for Medicare patients than 90% of providers in related specialties within Missouri.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2012 were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	2199
doctor visit	352
immunotherapy	1066
injections	1066
minimally invasive procedures	1871
skin testing	2199

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2013 were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	2420
doctor visit	349
immunotherapy	1000
injections	1000
minimally invasive procedures	2045
skin testing	2420

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	82
Female	159

**Ethnicity**
Non-Hispanic White	213
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	135
From 75 to 84	61
85 and over	12
Less than 65	33

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2013

Hypertension	66
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	23
Depression	25
Chronic Kidney Disease	13
Asthma	37
Osteoperosis	10
Atrial Fibrilation	6
Heart Failure	10
Chronic Obstructive Pulmonary Disease	13
Diabetes	24
Dementia	7
Cancer	12

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2014 were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	2318
doctor visit	288
immunotherapy	951
injections	951
minimally invasive procedures	1962
preventive care	14
skin testing	2318
vaccines	14

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	63
Female	146

**Ethnicity**
Non-Hispanic White	184
Black	14
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	114
From 75 to 84	59
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2014

Hypertension	58
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	23
Depression	25
Chronic Kidney Disease	12
Asthma	43
Osteoperosis	9
Atrial Fibrilation	7
Heart Failure	10
Chronic Obstructive Pulmonary Disease	11
Diabetes	24
Dementia	6
Cancer	10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2015 were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	1236
doctor visit	239
immunotherapy	882
injections	882
minimally invasive procedures	1052
preventive care	13
skin testing	1236
vaccines	13

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	130
Female	254

**Ethnicity**
Non-Hispanic White	332
Black	26
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	226
From 75 to 84	102
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2015

Hypertension	64
High Cholesterol	55
Stroke	0
Ischemic Heart Disease	20
Depression	26
Chronic Kidney Disease	17
Asthma	40
Osteoperosis	8
Atrial Fibrilation	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	12
Diabetes	25
Dementia	0
Cancer	10

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2016 were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	2399
doctor visit	254
immunotherapy	1115
injections	1115
minimally invasive procedures	2056
preventive care	26
skin testing	2399
vaccines	26

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	76
Female	122

**Ethnicity**
Non-Hispanic White	170
Black	14
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	118
From 75 to 84	51
85 and over	11
Less than 65	18

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2016

Hypertension	65
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	22
Depression	22
Chronic Kidney Disease	19
Asthma	45
Osteoperosis	10
Atrial Fibrilation	6
Heart Failure	13
Chronic Obstructive Pulmonary Disease	10
Diabetes	21
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2017 were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	2150
doctor visit	230
immunotherapy	1004
injections	1004
minimally invasive procedures	1867
preventive care	29
skin testing	2150
vaccines	29

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	66
Female	113

**Ethnicity**
Non-Hispanic White	153
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	99
From 75 to 84	50
85 and over	11
Less than 65	19

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2017

Hypertension	60
High Cholesterol	47
Stroke	0
Ischemic Heart Disease	23
Depression	21
Chronic Kidney Disease	21
Asthma	45
Osteoperosis	11
Atrial Fibrilation	0
Heart Failure	13
Chronic Obstructive Pulmonary Disease	8
Diabetes	22
Dementia	0
Cancer	8

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2018 were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	1889
doctor visit	231
immunotherapy	896
injections	896
minimally invasive procedures	1673
preventive care	21
skin testing	1889
vaccines	21

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	69
Female	113

**Ethnicity**
Non-Hispanic White	158
Black	11
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	104
From 75 to 84	52
85 and over	11
Less than 65	15

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2018

Hypertension	60
High Cholesterol	56
Stroke	0
Ischemic Heart Disease	23
Depression	23
Chronic Kidney Disease	21
Asthma	41
Osteoperosis	12
Atrial Fibrilation	8
Heart Failure	14
Chronic Obstructive Pulmonary Disease	8
Diabetes	23
Dementia	0
Cancer	10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2019 were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	1660
doctor visit	242
immunotherapy	1027
injections	1027
minimally invasive procedures	1426
preventive care	32
skin testing	1660
vaccines	32

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	73
Female	114

**Ethnicity**
Non-Hispanic White	163
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	105
From 75 to 84	50
85 and over	12
Less than 65	20

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2019

Hypertension	60
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	19
Depression	26
Chronic Kidney Disease	25
Asthma	41
Osteoperosis	9
Atrial Fibrilation	6
Heart Failure	9
Chronic Obstructive Pulmonary Disease	9
Diabetes	24
Dementia	6
Cancer	9

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2020 were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	2621
doctor visit	219
immunotherapy	1210
injections	1210
minimally invasive procedures	2200
preventive care	17
skin testing	2621
vaccines	17

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	73
Female	110

**Ethnicity**
Non-Hispanic White	158
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	114
From 75 to 84	45
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2020

Hypertension	56
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	20
Depression	21
Chronic Kidney Disease	20
Asthma	39
Osteoperosis	8
Atrial Fibrilation	0
Heart Failure	7
Chronic Obstructive Pulmonary Disease	7
Diabetes	21
Dementia	0
Cancer	8

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2021 were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	3235
doctor visit	239
immunotherapy	1586
injections	1586
minimally invasive procedures	2674
preventive care	28
skin testing	3235
vaccines	28

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	75
Female	141

**Ethnicity**
Non-Hispanic White	196
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	127
From 75 to 84	60
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2021

Hypertension	57
High Cholesterol	56
Stroke	0
Ischemic Heart Disease	20
Depression	25
Chronic Kidney Disease	19
Asthma	41
Osteoperosis	10
Atrial Fibrilation	7
Heart Failure	6
Chronic Obstructive Pulmonary Disease	11
Diabetes	21
Dementia	0
Cancer	8

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2022 were immunotherapy, injections, skin testing and allergy testing.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	1939
doctor visit	241
immunotherapy	2041
injections	2041
minimally invasive procedures	1573
preventive care	15
skin testing	1939
vaccines	15

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	73
Female	128

**Ethnicity**
Non-Hispanic White	181
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	105
From 75 to 84	68
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2022

Hypertension	64
High Cholesterol	70
Stroke	8
Ischemic Heart Disease	18
Depression	21
Chronic Kidney Disease	12
Asthma	51
Osteoperosis	15
Atrial Fibrilation	8
Heart Failure	0
Chronic Obstructive Pulmonary Disease	14
Diabetes	24
Dementia	0
Cancer	13

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2023 were immunotherapy, injections, skin testing and allergy testing.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

allergy testing	1566
doctor visit	217
immunotherapy	2635
injections	2635
minimally invasive procedures	1273
preventive care	19
skin testing	1566
vaccines	19

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	73
Female	127

**Ethnicity**
Non-Hispanic White	180
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	107
From 75 to 84	63
85 and over	12
Less than 65	18

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2023

Hypertension	65
High Cholesterol	73
Stroke	6
Ischemic Heart Disease	17
Depression	23
Chronic Kidney Disease	12
Asthma	53
Osteoperosis	17
Atrial Fibrilation	11
Heart Failure	6
Chronic Obstructive Pulmonary Disease	13
Diabetes	20
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO during 2024 were immunotherapy and injections.

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

doctor visit	51
immunotherapy	2297
injections	2297

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	51
Female	104

**Ethnicity**
Non-Hispanic White	138
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	85
From 75 to 84	49
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD in 2024

Hypertension	67
High Cholesterol	73
Stroke	0
Ischemic Heart Disease	15
Depression	25
Chronic Kidney Disease	14
Asthma	54
Osteoperosis	19
Atrial Fibrilation	10
Heart Failure	8
Chronic Obstructive Pulmonary Disease	16
Diabetes	20
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Robert F. Onder Jr., MD for Medicare patients.

The highest averages for the top procedures that Dr. Robert F. Onder Jr., MD treated as an allergist in Saint Louis, MO were skin testing, allergy testing, minimally invasive procedures and immunotherapy.

allergy testing	2136
doctor visit	242
immunotherapy	1362
injections	1362
minimally invasive procedures	1806
preventive care	21
skin testing	2136
vaccines	21

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Robert F. Onder Jr., MD.

**Gender**
Male	69
Female	125

**Ethnicity**
Black / African American	5
Asian / Pacific Islander	0
Non-Hispanic White	171
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	54
85 and over	5
Less than 65	9
65 to 74	110

Average of Total of Conditions of Medicare patients treated by Dr. Robert F. Onder Jr., MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Robert F. Onder Jr., MD treated were hypertension, high cholesterol, asthma and depression.

Hypertension	57
High Cholesterol	54
Stroke	1
Ischemic Heart Disease	18
Depression	21
Chronic Kidney Disease	15
Asthma	40
Osteoporosis	10
Heart Failure	8
Chronic Obstructive Pulmonary Disease	10
Diabetes	20
Atrial Fibrillation	5
Cancer	9
Dementia	1

Education & Training

Dr. Robert F. Onder Jr., MD graduated from Washington University in St. Louis School of Medicine. He completed residency at Barnes-Jewish Hospital. He is certified by the Board Certification: Amer Bd Allergy & Immunology and has a state license in Missouri.

Medical School: Washington University in St. Louis School of Medicine

Residency: Barnes-Jewish Hospital

Board Certification: Board Certification: Amer Bd Allergy & Immunology

Licensed In: Missouri

Affiliations & Hospitals

Dr. Robert F. Onder Jr., MD is associated with these hospitals and organizations:

Mercy Health System

Mercy Hospital St. Louis

Ratings & Reviews

Dr. Robert F. Onder Jr., MD has an exceptional overall rating with an average of 4.9 out of 5 stars based on 5 ratings. We collect ratings and reviews of Dr. Robert F. Onder Jr., MD from all over the web to help you find the right in Saint Louis, MO.

4.9

Overall Rating

(5 Ratings)

Leave a Review

General Payments

These charts describe general payments received by Dr. Robert F. Onder Jr., MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Genentech, Inc.	$3,391 Non-Covered Product $2,190	XOLAIR $1,201
Teva Pharmaceuticals USA, Inc.	$3,010 QVAR $2,834	AirDuo Digihaler $99	CINQAIR $35	PROAIR $10	QNASL $1	Other $31
Pfizer Inc.	$1,661 EUCRISA $70	CUTAQUIG $65	PANZYGA $27	$1,500
AstraZeneca AB	$1,509 $1,509
Merck Sharp & Dohme Corporation	$1,372 MK-8237 $1,337	$35
Other	$5,313 DUPIXENT $678	XOLAIR $414	NUCALA $310	TEZSPIRE $294	UBRELVY $280	Other $3,336

**Types of Payments**
Food and Beverage	$7,057
Travel and Lodging	$7,057
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program	$1,500
Gift	$500
Education	$142

Research Payments

Dr. Robert F. Onder Jr., MD has received 734 research payments totaling $7,579,003.

Biography

Dr. Robert Onder practices allergy & immunology. Dr. Onder obtained Dr. Onder's medical school training at Washington University in St. Louis School of Medicine and performed Dr. Onder's residency at Barnes-Jewish Hospital. Dr. Onder is affiliated with Mercy Hospital St. Louis.