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Jon M. Onosaki, PAC

Accepting New Patients

(Jon Onosaki, PA-C)

(340 Ratings)

Specializes in: Orthopedics/Orthopedic Surgery

Professional interests include: arm fracture, leg fracture, injuries, and more.

4300 Rose Drive Suite G
Yorba Linda, CA 92886

(714) 524-3800

Jon M. Onosaki, PAC is in Yorba Linda, CA specializing in orthopedics/orthopedic surgery. Jon M. Onosaki, PAC is affiliated with Providence, Providence Medical Foundation, St. Jude Medical Center (Fullerton) and St. Jude Heritage Medical Group.

Office Locations

St. Jude Heritage Medical Group

4300 Rose Drive Suite G
Yorba Linda, CA 92886

(714) 524-3800

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Some issues Jon M. Onosaki, PAC can help you with:

Musculoskeletal Problems

The musculoskeletal system refers collectively to the bones, joints, ligaments, muscles, and nerves. It is what gives the body structure and movement. Because this system encompasses so much of the body, musculoskeletal problems are extremely varied and can happen almost anywhere. There are musculoskeletal problems that affect only the joints, those that affect the bones, those that affect tendons and ligaments, and those that can happen in any area of the body but cause pain and numbness.

Joint problems include bursitis and arthritis. Bursitis is the inflammation of a fluid-filled sac cushion on the outside of a joint, causing symptoms including pain and swelling. Arthritis is the inflammation and damage of a joint due to wear and tear or disease. There are several treatments for arthritis, but if the damage progresses far enough, joint replacement may be necessary. In joint replacement, a metal or plastic implant is surgically placed within the joint to make movement easier.

Bone problems include scoliosis, fractures, and osteoporosis. Scoliosis is a curvature of the spine, making the normally straight spine look like a 'C' or 'S.' It is treated with braces or surgery. Osteoporosis is a disease that causes bones to weaken and break easily. It's most common in women, especially older women. Fully half of all women over 65 have osteoporosis. Fractures are any break in the bone. They can be a simple crack or a severe and complicated shatter. Osteoporosis causes fractures in people who have it, but other causes are trauma (such as a fall) or overuse.

Tendon and ligament problems most often result from injury or overuse. Two good examples are ligament tears and tendonitis. The most common ligament tear is the ACL tear in the knee. This ligament supports and stabilizes the knee and is most often torn during sports activities. Tendonitis happens when a tendon, which connects muscles and bones together, becomes irritated and inflamed. This happens most often in older patients who push their bodies too far, leading to pain and swelling. Treatment for both tendon and ligament problems usually includes rest, ice, and supporting the area to let it heal.

Pain and numbness problems can be caused by overuse, disease, an injury, or a compressed nerve. Lower back pain and carpal tunnel syndrome are two of the most common conditions patients encounter. Lower back pain may be caused by sore muscles that have been overworked, or an injury to the disks separating the vertebrae in the spine. Lower back pain usually goes away on its own within a few days, but it may require medical treatment depending on the cause. Carpal tunnel syndrome occurs when the nerve at the base of the palm becomes trapped or pinched. Symptoms include tingling, pain, numbness, or weakness in the hand. Treatment involves rest and sometimes steroid injections.

Because the musculoskeletal system involves so much of the body, problems here can be incredibly varied in their type and severity. Some musculoskeletal problems will go away on their own or only require rest, while others may require medication, physical therapy, or even surgery.

Noteworthy Medicare Patient Procedures Performed by Jon M. Onosaki, PAC in 2023

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

Top 5%

By Affordability:

total hip replacement

total joint replacement

total knee replacement

In 2023, Jon M. Onosaki, PAC had a list price for hip arthroplasty, hip reconstruction, hip replacement, hip surgery, knee replacement, total hip replacement, total joint replacement, and total knee replacement that was lower than the list prices billed to Medicare by 95% of providers in related specialties within California. 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 Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2012 were upper extremity surgery, joint surgery, minimally invasive procedures and open surgery.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

debridement (removal of unhealthy tissue)	28
decompression surgery	16
joint surgery	101
minimally invasive procedures	62
open surgery	58
reconstructive surgery	39
tendon surgery	43
upper extremity surgery	159

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2013 were upper extremity surgery, joint surgery, minimally invasive procedures and tendon surgery.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

debridement (removal of unhealthy tissue)	30
decompression surgery	15
joint surgery	115
minimally invasive procedures	80
open surgery	37
reconstructive surgery	35
tendon surgery	39
upper extremity surgery	152

2013 Medicare Patient Data

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	41
Female	33

**Age**
From 65 to 74	0
From 75 to 84	36
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Jon M. Onosaki, PAC in 2013

Hypertension	69
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	28
Depression	19
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	18
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2014 were joint surgery, upper extremity surgery, reconstructive surgery and minimally invasive procedures.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

joint surgery	80
minimally invasive procedures	37
reconstructive surgery	43
tendon surgery	13
upper extremity surgery	80

2014 Medicare Patient Data

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	42
Female	42

**Age**
From 65 to 74	42
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Jon M. Onosaki, PAC in 2014

Hypertension	64
High Cholesterol	69
Stroke	0
Ischemic Heart Disease	38
Depression	23
Chronic Kidney Disease	19
Asthma	0
Osteoperosis	13
Atrial Fibrilation	20
Heart Failure	13
Chronic Obstructive Pulmonary Disease	0
Diabetes	25
Dementia	0
Cancer	14

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2015 were joint surgery, upper extremity surgery, reconstructive surgery and aspiration.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

aspiration	25
doctor visit	53
injections	25
joint surgery	59
minimally invasive procedures	20
reconstructive surgery	39
upper extremity surgery	59

2015 Medicare Patient Data

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	92
Female	132

**Age**
From 65 to 74	128
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Jon M. Onosaki, PAC in 2015

Hypertension	68
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	29
Depression	17
Chronic Kidney Disease	10
Asthma	14
Osteoperosis	14
Atrial Fibrilation	12
Heart Failure	12
Chronic Obstructive Pulmonary Disease	11
Diabetes	20
Dementia	0
Cancer	11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2016 were joint surgery, upper extremity surgery, reconstructive surgery and minimally invasive procedures.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

aspiration	25
debridement (removal of unhealthy tissue)	16
decompression surgery	13
doctor visit	81
injections	25
joint surgery	105
lower extremity surgery	14
minimally invasive procedures	48
reconstructive surgery	57
upper extremity surgery	91

2016 Medicare Patient Data

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	74
Female	81

**Ethnicity**
Non-Hispanic White	139
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	83
From 75 to 84	60
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Jon M. Onosaki, PAC in 2016

Hypertension	59
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	31
Depression	18
Chronic Kidney Disease	18
Asthma	10
Osteoperosis	8
Atrial Fibrilation	9
Heart Failure	10
Chronic Obstructive Pulmonary Disease	0
Diabetes	26
Dementia	0
Cancer	14

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2017 were joint surgery, upper extremity surgery, minimally invasive procedures and reconstructive surgery.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

debridement (removal of unhealthy tissue)	38
decompression surgery	11
doctor visit	90
joint surgery	148
minimally invasive procedures	95
reconstructive surgery	53
tendon surgery	13
upper extremity surgery	148

2017 Medicare Patient Data

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	75
Female	86

**Ethnicity**
Non-Hispanic White	143
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	89
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Jon M. Onosaki, PAC in 2017

Hypertension	59
High Cholesterol	59
Stroke	0
Ischemic Heart Disease	31
Depression	20
Chronic Kidney Disease	17
Asthma	8
Osteoperosis	11
Atrial Fibrilation	9
Heart Failure	7
Chronic Obstructive Pulmonary Disease	7
Diabetes	19
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2018 were joint surgery, upper extremity surgery, minimally invasive procedures and reconstructive surgery.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

debridement (removal of unhealthy tissue)	34
decompression surgery	16
doctor visit	68
joint surgery	143
minimally invasive procedures	80
reconstructive surgery	63
upper extremity surgery	143

2018 Medicare Patient Data

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	78
Female	68

**Ethnicity**
Non-Hispanic White	128
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	81
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Jon M. Onosaki, PAC in 2018

Hypertension	68
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	27
Depression	22
Chronic Kidney Disease	18
Asthma	12
Osteoperosis	12
Atrial Fibrilation	8
Heart Failure	0
Chronic Obstructive Pulmonary Disease	8
Diabetes	20
Dementia	0
Cancer	13

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2019 were joint surgery, upper extremity surgery, minimally invasive procedures and reconstructive surgery.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

debridement (removal of unhealthy tissue)	48
decompression surgery	28
doctor visit	83
joint surgery	209
minimally invasive procedures	135
reconstructive surgery	74
tendon surgery	18
upper extremity surgery	209

2019 Medicare Patient Data

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	87
Female	102

**Ethnicity**
Non-Hispanic White	172
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	113
From 75 to 84	65
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Jon M. Onosaki, PAC in 2019

Hypertension	68
High Cholesterol	72
Stroke	0
Ischemic Heart Disease	37
Depression	18
Chronic Kidney Disease	17
Asthma	13
Osteoperosis	9
Atrial Fibrilation	11
Heart Failure	8
Chronic Obstructive Pulmonary Disease	10
Diabetes	17
Dementia	0
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2020 were joint surgery, reconstructive surgery, lower extremity surgery and minimally invasive procedures.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

decompression surgery	13
joint surgery	77
lower extremity surgery	52
minimally invasive procedures	25
reconstructive surgery	52
upper extremity surgery	25

2020 Medicare Patient Data

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	44
Female	59

**Ethnicity**
Non-Hispanic White	77
Black	0
Hispanic	11
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	60
From 75 to 84	32
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Jon M. Onosaki, PAC in 2020

Hypertension	69
High Cholesterol	68
Stroke	0
Ischemic Heart Disease	26
Depression	18
Chronic Kidney Disease	26
Asthma	0
Osteoperosis	15
Atrial Fibrilation	13
Heart Failure	12
Chronic Obstructive Pulmonary Disease	0
Diabetes	17
Dementia	0
Cancer	15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2021 were reconstructive surgery, joint surgery and lower extremity surgery.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

doctor visit	48
joint surgery	47
lower extremity surgery	47
reconstructive surgery	47

2021 Medicare Patient Data

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	40
Female	60

**Ethnicity**
Non-Hispanic White	75
Black	0
Hispanic	0
Asian	12
Other	0
Native American	0

**Age**
From 65 to 74	51
From 75 to 84	32
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Jon M. Onosaki, PAC in 2021

Hypertension	75
High Cholesterol	74
Stroke	0
Ischemic Heart Disease	35
Depression	19
Chronic Kidney Disease	34
Asthma	0
Osteoperosis	25
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	15
Diabetes	27
Dementia	13
Cancer	16

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA during 2022 were aspiration, injections, reconstructive surgery and joint surgery.

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

aspiration	99
doctor visit	195
injections	99
joint surgery	16
lower extremity surgery	16
reconstructive surgery	16

2022 Medicare Patient Data

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	49
Female	68

**Ethnicity**
Non-Hispanic White	84
Black	0
Hispanic	0
Asian	16
Other	0
Native American	0

**Age**
From 65 to 74	52
From 75 to 84	44
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Jon M. Onosaki, PAC in 2022

Hypertension	74
High Cholesterol	75
Stroke	0
Ischemic Heart Disease	19
Depression	18
Chronic Kidney Disease	24
Asthma	13
Osteoperosis	25
Atrial Fibrilation	18
Heart Failure	16
Chronic Obstructive Pulmonary Disease	0
Diabetes	25
Dementia	0
Cancer	14

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Jon M. Onosaki, PAC for Medicare patients.

The highest averages for the top procedures that Jon M. Onosaki, PAC treated as in Yorba Linda, CA were upper extremity surgery, joint surgery, minimally invasive procedures and aspiration.

aspiration	49
debridement (removal of unhealthy tissue)	32
decompression surgery	16
doctor visit	88
injections	49
joint surgery	100
lower extremity surgery	32
minimally invasive procedures	64
open surgery	47
reconstructive surgery	47
tendon surgery	25
upper extremity surgery	118

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Jon M. Onosaki, PAC.

**Gender**
Male	56
Female	66

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	2
Non-Hispanic White	74
Native American / Alaskan Native	0
Hispanic	1
Other	0

**Age**
75 to 84	24
85 and over	0
Less than 65	0
65 to 74	63

Average of Total of Conditions of Medicare patients treated by Jon M. Onosaki, PAC From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Jon M. Onosaki, PAC treated were high cholesterol, hypertension, ischemic heart disease and diabetes.

Hypertension	61
High Cholesterol	61
Stroke	0
Ischemic Heart Disease	27
Depression	17
Chronic Kidney Disease	16
Asthma	6
Osteoporosis	12
Heart Failure	8
Chronic Obstructive Pulmonary Disease	4
Diabetes	19
Atrial Fibrillation	10
Dementia	1
Cancer	11

Education & Training

He is certified by the Board Certification: National Commission on Certification of Physician Assistants, Physician Assistant and has a state license in California.

Board Certification: Board Certification: National Commission on Certification of Physician Assistants, Physician Assistant

Licensed In: California

Affiliations & Hospitals

Jon M. Onosaki, PAC is associated with these hospitals and organizations:

Providence

Providence Medical Foundation

St. Jude Medical Center (Fullerton)

St. Jude Heritage Medical Group

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.

Jon M. Onosaki, PAC appears to accept the following insurance providers: Aetna PPO, Aetna HMO, CIGNA PPO, CIGNA HMO, Blue Shield of California, MultiPlan PPO, Medicare Advantage, HealthSmart, Interplan PPO, TriWest, Anthem Blue Cross HMO, Anthem Blue Cross PPO, Health Net PPO, Health Net HMO, Anthem, Coventry PPO, United Healthcare PPO, Providence, United Healthcare HMO, US Family Health Plan, Aetna Medicare PPO and CoventryFirst Health PPO.

Insurance Accepted by Provider includes:

According to our sources, Jon M. Onosaki, PAC accepts the following insurance providers:

Aetna PPO

Aetna HMO

CIGNA PPO

CIGNA HMO

Blue Shield of California

MultiPlan PPO

Medicare Advantage

HealthSmart

Interplan PPO

TriWest

Anthem Blue Cross HMO

Anthem Blue Cross PPO

Health Net PPO

Health Net HMO

Anthem

Coventry PPO

United Healthcare PPO

Providence

United Healthcare HMO

US Family Health Plan

Aetna Medicare PPO

CoventryFirst Health PPO

Ratings & Reviews

Jon M. Onosaki, PAC has an exceptional overall rating with an average of 5.0 out of 5 stars based on 340 ratings. We collect ratings and reviews of Jon M. Onosaki, PAC from all over the web to help you find the right in Yorba Linda, CA.

Overall Rating

(340 Ratings)

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Biography

Mr. Jon Onosaki is an orthopedics/orthopedic surgery specialist in Orange, CA and Yorba Linda, CA. His areas of expertise include forearm fracture, knee arthritis, and femur (thigh bone) fracture. Mr. Onosaki is professionally affiliated with Providence Medical Foundation. He is rated 5.0 stars (out of 5) by his patients. He usually is in-network for Anthem, Blue California, and HealthSmart, as well as other insurance carriers. Mr. Onosaki has received the distinction of Golden State Patient Experience Award. Providence Medical Foundation reports that he is accepting new patients at his office in Yorba Linda, CA.