Jon M. Onosaki, PA-C
- Medicare services, 2024
- 4,327
- Medicare patients, 2024
- 135
- Part D claims, 2024
- 193
- Hospital affiliations
- 1
- Industry payments
- $26
- Practice address
- 4300 Rose Dr, Yorba Linda, CA 92886
- Practice phone
- Call (714) 449-4900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Providence Medical Foundation
Yorba Linda, California
Find Jon Onosaki's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Jon M. Onosaki is a physician assistant in Yorba Linda, California
Jon Onosaki practices at Providence Medical Foundation in Yorba Linda, California.
Jon Onosaki's NPI, 1396059754, was assigned on July 27, 2010. Jon Onosaki holds California license PA19725.
- NPI
- 1396059754NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456543396
- NPI enumeration date
- July 27, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (714) 449-4900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Jon M. Onosaki practices at Providence Medical Foundation in Yorba Linda, California
Jon Onosaki's primary practice is Providence Medical Foundation, at 4300 Rose Dr, Yorba Linda, CA 92886 in Orange County. The practice phone is (714) 449-4900.
- Providence Medical Foundation4300 Rose Dr, Yorba Linda, CA 92886 · Orange CountyPhone(714) 449-4900
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Jon M. Onosaki is affiliated with 3 sites of care and 1 medical group
Jon Onosaki's primary practice is Providence Medical Foundation in Yorba Linda, California. Jon Onosaki is also affiliated with Providence St. Jude Medical Center. The medical group on file is St. Jude Heritage Medical Group. Dmand AI also links Jon Onosaki to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Jon M. Onosaki's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Jon Onosaki practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence Medical Foundation | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Jon M. Onosaki is one of 11,482 physician assistants in California
Physician assistant is Jon Onosaki's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Jon Onosaki is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Jon Onosaki is licensed in California.
Specialties and state licenses
- Physician assistant, CaliforniaPrimary
Clinical focus
Dmand AI lists arthritis, bursitis, depression, fluid in a joint, joint pain, knee injury, lower back pain and rotator cuff injury among the conditions Jon Onosaki treats.
Physician assistants near Jon Onosaki
Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Jon M. Onosaki billed Medicare for 4,327 services in 2024
CMS data shows 4,327 Medicare services from Jon Onosaki across 8 procedure codes in 2024, for 135 Medicare patients. Medicare paid $48,409 for them.
Jon Onosaki's Medicare services by type, 2024
- Drugs given in the office3,927
- Office and hospital visits227
- Surgery173
Where Jon Onosaki's Medicare services took place, 2024
- In an office4,28999%
- In a facility381%
Jon Onosaki compared with the California median for physician assistants, 2024
- Jon Onosaki
- California median
- Medicare services
- 4,327vs 20421.2 times
- Medicare patients
- 135vs 10529% above
- Part D claims
- 143vs 24341% below
Medians across 7,065 physician assistants in California with Dmand AI profiles that report each measure.
Jon Onosaki's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Jon Onosaki?
Medicare shows one payer. Book a meeting to get commercial claims data for Jon Onosaki and other physician assistants in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Jon M. Onosaki treated 135 Medicare patients in 2024, average age 74
CMS counts 135 Medicare patients who saw Jon Onosaki in 2024. The largest group is 65 to 74, with 74 patients. 75% of them have arthritis, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Jon Onosaki's median patient age at 71, with 54% women.
Jon Onosaki's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Jon Onosaki's Medicare patients by sex, 2024
- Women7556%
- Men6044%
Chronic conditions among Jon Onosaki's Medicare patients, 2024
- Arthritis75%
- High cholesterol75%
- High blood pressure71%
- Diabetes32%
- Osteoporosis28%
- Chronic kidney disease19%
- Mood disorders19%
- Depression18%
Share of Medicare patients with each condition. A patient can have several.
Jon Onosaki's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Jon M. Onosaki wrote 193 Medicare Part D claims in 2024
In 2024, Jon Onosaki wrote 193 Medicare Part D claims for 95 patients. 98% of them were for generic drugs. CMS names the drug for 143 of them, across 6 drugs with 11 or more claims each, at $1,227 in total drug cost.
Jon Onosaki's Part D claims by kind of drug, 2024
- Generic190 claims98%
- Brand-name and other3 claims2%
Jon Onosaki's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Jon Onosaki's Part D claims, 2024
- Opioids53%103 of 193 claims
- Antibiotics6%12 of 193 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Jon M. Onosaki offers telehealth to Medicare patients
Jon Onosaki accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Jon Onosaki as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Jon M. Onosaki received $26 in industry payments in 2024
CMS Open Payments shows 1 general payment to Jon Onosaki from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $26.
Companies that paid Jon Onosaki the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Jon M. Onosaki is board certified in certified physician assistant
Jon Onosaki is a member of AAPA.
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for Jon M. Onosaki's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Jon M. Onosaki
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Jon M. Onosaki's NPI number?
Jon M. Onosaki's NPI number is 1396059754. It was assigned on July 27, 2010, and it is active in the NPI Registry.
What does Jon M. Onosaki specialize in?
Jon M. Onosaki is a physician assistant in Yorba Linda, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Jon M. Onosaki practice?
Jon Onosaki practices at 4300 Rose Dr, Yorba Linda, CA 92886. Jon Onosaki's primary practice is Providence Medical Foundation in Yorba Linda, California. Dmand AI also links Jon Onosaki to 1 group practice or clinic.
What is Jon M. Onosaki's office phone number?
The practice phone on file for Jon Onosaki is (714) 449-4900.
What is Jon M. Onosaki's medical license number?
Jon Onosaki holds California license PA19725.
Which hospitals is Jon M. Onosaki affiliated with?
Jon Onosaki is affiliated with Providence St. Jude Medical Center.
What medical group is Jon M. Onosaki part of?
Jon Onosaki is linked to St. Jude Heritage Medical Group.
Does Jon M. Onosaki accept Medicare?
Yes. CMS data shows Jon Onosaki billed Medicare for 4,327 services in 2024, and Jon Onosaki accepts Medicare assignment.
Does Jon M. Onosaki offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Jon Onosaki as offering telehealth services.
How many Medicare patients does Jon M. Onosaki see?
CMS counts 135 Medicare patients who saw Jon Onosaki in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
Is Jon M. Onosaki board certified?
Yes. Jon Onosaki is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
What services does Jon M. Onosaki bill to Medicare?
In 2024, Jon Onosaki's most billed Medicare services were injected or infused drug (J7329), office visit, established patient (99213) and surgery: bones and joints (20611).
What drugs does Jon M. Onosaki prescribe most?
In 2024 Medicare Part D data, Jon Onosaki's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Tramadol HCl and Gabapentin.
Has Jon M. Onosaki received payments from drug or device companies?
CMS Open Payments shows $26 in general payments to Jon Onosaki from 1 company from 2024 to 2024. The largest total came from Stryker Corporation.
How long has Jon M. Onosaki been practicing?
Jon Onosaki graduated from medical school in 2007, 19 years ago.
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