Jonathon Ahn, MD
NPI 1053803882 · Anesthesiology Physician · Fullerton, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathon Ahn, MD is a Anesthesiology Physician provider in Fullerton, CA (NPI 1053803882).
Provider details
- NPI number
- 1053803882
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A164226 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
72 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 18 | $132 |
| Anesthesia for Lens Surgery00142 | 15 | $132 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 14 | $44 |
| Ultrasonic Guidance for Blood Vessel Access76937 | 14 | $14 |
| Injection of Substance Into Lower Spine Canal62322 | 11 | $82 |
Typical Medicare-allowed amounts for these services range $14–$132 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-06-06
- Last updated
- 2023-06-15
- Certified
- 2023-03-31
Frequently asked questions
- What is Jonathon Ahn's NPI number?
- Jonathon Ahn's National Provider Identifier (NPI) is 1053803882, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathon Ahn's specialty?
- Jonathon Ahn is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathon Ahn located?
- Jonathon Ahn's practice location on file with NPPES is 101 E Valencia Mesa Dr, Fullerton, CA 92835-3809.
- What is Jonathon Ahn's phone number?
- The practice phone number listed in the NPPES registry for Jonathon Ahn is (714) 871-3280.
- Does Jonathon Ahn accept Medicare?
- Jonathon Ahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathon Ahn's NPI active?
- Yes — Jonathon Ahn's NPI (1053803882) is active in the NPPES registry as of the last update on 2023-06-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.