Jonathan Oishi, D.O.
NPI 1396109781 · Internal Medicine Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Oishi, D.O. is a Internal Medicine Physician provider in Irvine, CA (NPI 1396109781).
Provider details
- NPI number
- 1396109781
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A17106 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
10 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefdinir | 32 | 32 |
| Apixabanbrand: Eliquis | 28 | 25 |
| Levofloxacin | 24 | 24 |
| Pantoprazole Sodium | 23 | 23 |
| Atorvastatin Calcium | 23 | 23 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 22 | 20 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$149 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
Registry dates
- Enumerated
- 2016-04-11
- Last updated
- 2025-11-24
- Certified
- 2025-11-24
Frequently asked questions
- What is Jonathan Oishi's NPI number?
- Jonathan Oishi's National Provider Identifier (NPI) is 1396109781, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Oishi's specialty?
- Jonathan Oishi is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Oishi located?
- Jonathan Oishi's practice location on file with NPPES is 11 Technology Dr, Irvine, CA 92618-2302.
- What is Jonathan Oishi's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Oishi is (855) 206-6764.
- Does Jonathan Oishi accept Medicare?
- Jonathan Oishi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Oishi's NPI active?
- Yes — Jonathan Oishi's NPI (1396109781) is active in the NPPES registry as of the last update on 2025-11-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.