Sean Johnston, M.D., PH.D.
NPI 1477581866 · Vascular & Interventional Radiology Physician · Santa Ana, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sean Johnston, M.D., PH.D. is a Vascular & Interventional Radiology Physician provider in Santa Ana, CA (NPI 1477581866).
Provider details
- NPI number
- 1477581866
- Entity type
- Individual
- Primary specialty
- Vascular & Interventional Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A73716 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
8,011 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 1,267 | $8 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 673 | $9 |
| X-Ray of Chest, 2 Views71046 | 343 | $10 |
| Ct Scan Head Or Brain Without Contrast70450 | 252 | $37 |
| X-Ray of Hip, 2-3 Views73502 | 179 | $10 |
| X-Ray of Shoulder, Minimum of 2 Views73030 | 178 | $9 |
| Ct Scan of Chest Without Contrast |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-28
- Last updated
- 2026-05-18
- Certified
- 2026-05-18
Frequently asked questions
- What is Sean Johnston's NPI number?
- Sean Johnston's National Provider Identifier (NPI) is 1477581866, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sean Johnston's specialty?
- Sean Johnston is listed in the NPPES registry with a primary specialty of Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Sean Johnston located?
- Sean Johnston's practice location on file with NPPES is 2414 S Fairview St Ste 202b, Santa Ana, CA 92704-5318.
- What is Sean Johnston's phone number?
- The practice phone number listed in the NPPES registry for Sean Johnston is (805) 300-6761.
- Does Sean Johnston accept Medicare?
- Sean Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sean Johnston's NPI active?
- Yes — Sean Johnston's NPI (1477581866) is active in the NPPES registry as of the last update on 2026-05-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.