Jon Onosaki, PA-C
NPI 1396059754 · Physician Assistant · Orange, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jon Onosaki, PA-C is a Physician Assistant provider in Orange, CA (NPI 1396059754).
Provider details
- NPI number
- 1396059754
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- PA19725 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
400 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 141 | $84 |
| Aspiration And/Or Injection of Fluid Large Joint Using Ultrasound Guidance20611 | 135 | $100 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 73 | $52 |
| Replacement of Knee Joint, Both Sides of Knee27447 | 21 | $183 |
| Replacement of Thigh Bone and Hip Joint With Prosthesis27130 | 17 | $182 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 41 | 27 |
| Tramadol Hcl | 30 | 19 |
| Gabapentin | 24 | 19 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 17 | 12 |
| Celecoxib | 16 | — |
| Acetaminophen With Codeinebrand: Acetaminophen-Codeine | 15 | — |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$26 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 4300 Rose DrYorba Linda, CA 92886-2026Phone: (714) 577-6880
Registry dates
- Enumerated
- 2010-07-27
- Last updated
- 2021-11-09
- Certified
- 2021-11-09
Frequently asked questions
- What is Jon Onosaki's NPI number?
- Jon Onosaki's National Provider Identifier (NPI) is 1396059754, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jon Onosaki's specialty?
- Jon Onosaki is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Jon Onosaki located?
- Jon Onosaki's practice location on file with NPPES is 280 S Main St Ste 200, Orange, CA 92868-3852.
- What is Jon Onosaki's phone number?
- The practice phone number listed in the NPPES registry for Jon Onosaki is (714) 634-4567.
- Does Jon Onosaki accept Medicare?
- Jon Onosaki is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jon Onosaki's NPI active?
- Yes — Jon Onosaki's NPI (1396059754) is active in the NPPES registry as of the last update on 2021-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.