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Home > CA Providers > Orthopedic Surgeons

Dr. Richard C. Diehl, MD

(1 Rating)

Specializes in: Orthopedics/Orthopedic Surgery

800 S Raymond Avenue
Pasadena, CA 91105

(626) 795-8051

Dr. Richard C. Diehl, MD is an orthopedist in Pasadena, CA specializing in orthopedics/orthopedic surgery.

Office Locations

800 S Raymond Avenue
Pasadena, CA 91105

(626) 795-8051

(626) 795-0356

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In The News

“That is an intricate artificial knee that was given to me by my friend Dr. Richard Diehl.”—"Old Friends Rally to a Grateful Patient", Los Angeles Times, March 2025

“Peete was scheduled to leave Monday night for Los Angeles to be evaluated by Dr. Richard Diehl, the team orthopedist for...”—"PRO FOOTBALL DAILY REPORT : AROUND THE NFL : Peete Probably Is Lost for Season", Los Angeles Times, September 2024

“Dr. Richard Diehl, the orthopedic surgeon who works with my breakaway bones, is a good friend, as are his wife, Cathy, and their gorgeous...”—"Doctoring Up a Moving Experience", Los Angeles Times, May 2024

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2012 were X-rays, musculoskeletal imaging, aspiration and injections.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	702
computer assisted surgery (CAS)	25
doctor visit	1148
hip imaging	137
injections	702
joint surgery	178
lower extremity surgery	178
musculoskeletal imaging	1118
pelvic imaging	154
reconstructive surgery	178
spinal procedures	46
X-rays	1318

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2013 were X-rays, musculoskeletal imaging, aspiration and injections.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	751
doctor visit	1194
hip imaging	159
injections	751
joint surgery	211
lower extremity surgery	211
musculoskeletal imaging	1022
pelvic imaging	168
reconstructive surgery	211
spinal procedures	72
X-rays	1262

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Male	281
Female	538

**Ethnicity**
Non-Hispanic White	686
Black	29
Hispanic	49
Asian	40
Other	0
Native American	0

**Age**
From 65 to 74	319
From 75 to 84	327
85 and over	158
Less than 65	15

Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD in 2013

Hypertension	70
High Cholesterol	57
Stroke	4
Ischemic Heart Disease	41
Depression	19
Chronic Kidney Disease	16
Asthma	10
Osteoperosis	15
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	12
Diabetes	22
Dementia	8
Cancer	16

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2014 were X-rays, musculoskeletal imaging, aspiration and injections.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	840
doctor visit	1177
hip imaging	157
injections	840
joint surgery	199
lower extremity surgery	199
musculoskeletal imaging	1066
pelvic imaging	150
reconstructive surgery	199
spinal procedures	61
X-rays	1277

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Male	284
Female	524

**Ethnicity**
Non-Hispanic White	673
Black	35
Hispanic	42
Asian	39
Other	0
Native American	0

**Age**
From 65 to 74	340
From 75 to 84	294
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD in 2014

Hypertension	67
High Cholesterol	55
Stroke	4
Ischemic Heart Disease	39
Depression	17
Chronic Kidney Disease	18
Asthma	8
Osteoperosis	12
Atrial Fibrilation	14
Heart Failure	14
Chronic Obstructive Pulmonary Disease	8
Diabetes	22
Dementia	8
Cancer	15

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2015 were X-rays, musculoskeletal imaging, aspiration and injections.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	924
doctor visit	1323
hip imaging	150
injections	924
joint surgery	14
lower extremity surgery	14
musculoskeletal imaging	1120
pelvic imaging	150
reconstructive surgery	14
spinal procedures	94
thoracic (chest) imaging	14
X-rays	1378

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Male	508
Female	914

**Ethnicity**
Non-Hispanic White	1176
Black	38
Hispanic	92
Asian	76
Other	40
Native American	0

**Age**
From 65 to 74	566
From 75 to 84	526
85 and over	292
Less than 65	38

Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD in 2015

Hypertension	64
High Cholesterol	57
Stroke	4
Ischemic Heart Disease	37
Depression	15
Chronic Kidney Disease	17
Asthma	10
Osteoperosis	9
Atrial Fibrilation	13
Heart Failure	17
Chronic Obstructive Pulmonary Disease	10
Diabetes	23
Dementia	7
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2016 were X-rays, aspiration, injections and musculoskeletal imaging.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	991
doctor visit	1498
injections	991
musculoskeletal imaging	987
pelvic imaging	40
spinal procedures	139
thoracic (chest) imaging	30
X-rays	1196

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Male	295
Female	525

**Ethnicity**
Non-Hispanic White	657
Black	33
Hispanic	65
Asian	43
Other	22
Native American	0

**Age**
From 65 to 74	327
From 75 to 84	297
85 and over	175
Less than 65	21

Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD in 2016

Hypertension	66
High Cholesterol	56
Stroke	5
Ischemic Heart Disease	31
Depression	19
Chronic Kidney Disease	21
Asthma	12
Osteoperosis	10
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	8
Diabetes	23
Dementia	10
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2017 were X-rays, aspiration, injections and musculoskeletal imaging.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	945
doctor visit	1622
injections	945
musculoskeletal imaging	934
pelvic imaging	14
spinal procedures	189
thoracic (chest) imaging	19
X-rays	1156

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Male	296
Female	544

**Ethnicity**
Non-Hispanic White	673
Black	34
Hispanic	60
Asian	53
Other	20
Native American	0

**Age**
From 65 to 74	317
From 75 to 84	320
85 and over	187
Less than 65	16

Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD in 2017

Hypertension	66
High Cholesterol	50
Stroke	4
Ischemic Heart Disease	33
Depression	20
Chronic Kidney Disease	22
Asthma	7
Osteoperosis	10
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	21
Dementia	11
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2018 were injections, aspiration, X-rays and musculoskeletal imaging.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	1314
doctor visit	1782
injections	1335
musculoskeletal imaging	1010
pelvic imaging	44
spinal procedures	158
thoracic (chest) imaging	14
X-rays	1226

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Male	351
Female	672

**Ethnicity**
Non-Hispanic White	780
Black	48
Hispanic	104
Asian	60
Other	31
Native American	0

**Age**
From 65 to 74	409
From 75 to 84	388
85 and over	207
Less than 65	19

Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD in 2018

Hypertension	66
High Cholesterol	60
Stroke	4
Ischemic Heart Disease	33
Depression	21
Chronic Kidney Disease	25
Asthma	9
Osteoperosis	11
Atrial Fibrilation	15
Heart Failure	16
Chronic Obstructive Pulmonary Disease	8
Diabetes	27
Dementia	9
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2019 were X-rays, aspiration, injections and musculoskeletal imaging.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	1191
doctor visit	1710
injections	1191
musculoskeletal imaging	1001
pelvic imaging	30
spinal procedures	146
thoracic (chest) imaging	14
X-rays	1191

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Male	361
Female	669

**Ethnicity**
Non-Hispanic White	791
Black	35
Hispanic	102
Asian	68
Other	34
Native American	0

**Age**
From 65 to 74	399
From 75 to 84	413
85 and over	201
Less than 65	17

Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD in 2019

Hypertension	67
High Cholesterol	62
Stroke	3
Ischemic Heart Disease	34
Depression	22
Chronic Kidney Disease	23
Asthma	7
Osteoperosis	12
Atrial Fibrilation	13
Heart Failure	13
Chronic Obstructive Pulmonary Disease	9
Diabetes	26
Dementia	9
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2020 were X-rays, aspiration, injections and musculoskeletal imaging.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	746
doctor visit	1192
hip imaging	12
injections	746
MRI (magnetic resonance imaging)	12
musculoskeletal imaging	678
pelvic imaging	18
spinal procedures	84
thoracic (chest) imaging	11
X-rays	779

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Male	225
Female	390

**Ethnicity**
Non-Hispanic White	481
Black	23
Hispanic	47
Asian	37
Other	27
Native American	0

**Age**
From 65 to 74	216
From 75 to 84	250
85 and over	132
Less than 65	17

Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD in 2020

Hypertension	66
High Cholesterol	62
Stroke	5
Ischemic Heart Disease	40
Depression	22
Chronic Kidney Disease	27
Asthma	8
Osteoperosis	9
Atrial Fibrilation	16
Heart Failure	21
Chronic Obstructive Pulmonary Disease	8
Diabetes	27
Dementia	11
Cancer	14

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2021 were X-rays, musculoskeletal imaging, aspiration and injections.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	666
doctor visit	1308
hip imaging	50
injections	666
MRI (magnetic resonance imaging)	85
musculoskeletal imaging	746
pelvic imaging	28
spinal procedures	165
thoracic (chest) imaging	16
X-rays	870

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Male	237
Female	464

**Ethnicity**
Non-Hispanic White	545
Black	27
Hispanic	46
Asian	53
Other	30
Native American	0

**Age**
From 65 to 74	223
From 75 to 84	323
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD in 2021

Hypertension	65
High Cholesterol	65
Stroke	4
Ischemic Heart Disease	39
Depression	23
Chronic Kidney Disease	24
Asthma	8
Osteoperosis	16
Atrial Fibrilation	16
Heart Failure	17
Chronic Obstructive Pulmonary Disease	8
Diabetes	26
Dementia	10
Cancer	14

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA during 2022 were X-rays, musculoskeletal imaging, aspiration and injections.

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

aspiration	472
doctor visit	1023
hip imaging	31
injections	472
MRI (magnetic resonance imaging)	70
musculoskeletal imaging	623
pelvic imaging	15
spinal procedures	157
thoracic (chest) imaging	12
X-rays	737

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Male	206
Female	433

**Ethnicity**
Non-Hispanic White	502
Black	22
Hispanic	38
Asian	56
Other	21
Native American	0

**Age**
From 65 to 74	243
From 75 to 84	254
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD in 2022

Hypertension	73
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	31
Depression	21
Chronic Kidney Disease	19
Asthma	13
Osteoperosis	21
Atrial Fibrilation	18
Heart Failure	14
Chronic Obstructive Pulmonary Disease	11
Diabetes	23
Dementia	8
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Richard C. Diehl, MD for Medicare patients.

The highest averages for the top procedures that Dr. Richard C. Diehl, MD treated as an orthopedist in Pasadena, CA were X-rays, musculoskeletal imaging, injections and aspiration.

aspiration	867
computer assisted surgery (CAS)	25
doctor visit	1361
hip imaging	99
injections	869
joint surgery	150
lower extremity surgery	150
MRI (magnetic resonance imaging)	55
musculoskeletal imaging	936
pelvic imaging	73
reconstructive surgery	150
spinal procedures	119
thoracic (chest) imaging	16
X-rays	1126

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Richard C. Diehl, MD.

**Gender**
Female	515
Male	276

**Ethnicity**
Black / African American	29
Asian / Pacific Islander	47
Non-Hispanic White	633
Native American / Alaskan Native	0
Hispanic	58
Other	20

**Age**
75 to 84	308
85 and over	122
Less than 65	13
65 to 74	305

Average of Total of Conditions of Medicare patients treated by Dr. Richard C. Diehl, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Richard C. Diehl, MD treated were hypertension, high cholesterol, ischemic heart disease and diabetes.

Hypertension	60
High Cholesterol	54
Stroke	3
Ischemic Heart Disease	32
Depression	18
Chronic Kidney Disease	19
Asthma	8
Osteoporosis	11
Heart Failure	14
Chronic Obstructive Pulmonary Disease	8
Diabetes	21
Atrial Fibrillation	13
Dementia	8
Cancer	12

Education & Training

He has a state license in California.

Licensed In: California

Ratings & Reviews

Dr. Richard C. Diehl, MD has a good overall rating with an average of 3.0 out of 5 stars based on 1 ratings. We collect ratings and reviews of Dr. Richard C. Diehl, MD from all over the web to help you find the right in Pasadena, CA.

Overall Rating

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General Payments

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

**Payments by Company**
Zimmer Holding Inc	$353 Knee $232	Hip $122
Zimmer Biomet Holdings, Inc.	$239 AccuFill $125	KNEES $114
Stryker Corporation	$229 HIPS $229
Halyard Health, Inc.	$117 SURGICAL PAIN REGIONAL ANESTHESIA $117
Ethicon Inc.	$112 Sutures $112
Other	$321 Biologics Therapies $52	ORTHOVISC $32	MONOVISC $32	KYPHON Balloon Kyphoplasty $29	Early Intervention $28	Other $150

**Types of Payments**
Food and Beverage	$1,292
Gift	$79

Ownership and Interest Payments

This table describes ownership payments received by Dr. Richard C. Diehl, MD.

Senate Surgical Distribution, LLC	2018	$18,351.09	Physician Covered Recipient	Limited Liability Company Membership Interest
Senate Surgical Distribution, LLC	2017	$17,038.41	Physician Covered Recipient	Limited Liability Company Membership Interest
Senate Surgical Distribution, LLC	2020	$16,157.42	Physician Covered Recipient	Limited Liability Company Membership Interest
Senate Surgical Distribution, LLC	2014	$16,118.36	Physician Covered Recipient	Limited Liability Company Interest.
Senate Surgical Distribution, LLC	2015	$15,602.43	Physician Covered Recipient	Limited Liability Company Membership Interest
Senate Surgical Distribution, LLC	2016	$15,510.81	Physician Covered Recipient	Limited Liability Company Membership Interest
Senate Surgical Distribution, LLC	2021	$14,881.68	Physician Covered Recipient	Limited Liability Company Membership Interest
Senate Surgical Distribution, LLC	2022	$14,673.76	Physician Covered Recipient	Limited Liability Company Interest
Senate Surgical Distribution, LLC	2019	$13,789.78	Physician Covered Recipient	Current or prospective ownership or investment interest
Senate Surgical Distribution, LLC	2013	$11,057.29	Physician Covered Recipient	Limited Liability Company Interest.