Ian Tseng, M.D.
NPI 1689949257 · Diagnostic Radiology Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ian Tseng, M.D. is a Diagnostic Radiology Physician provider in Irvine, CA (NPI 1689949257).
Provider details
- NPI number
- 1689949257
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A129394 (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 tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
2,070 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) |
|---|---|---|
| Ct Scan Head Or Brain Without Contrast70450 | 443 | $41 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 367 | $91 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 166 | $86 |
| Ct Scan of Upper Spine Without Contrast72125 | 154 | $49 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 140 | $89 |
| X-Ray of Chest, 1 View71045 | 130 | $9 |
Practice location
Mailing address
Additional practice locations (1)
- 1510 E Herndon Ave Ste 110Fresno, CA 93720-3333Phone: (559) 450-6742Fax: (559) 450-6743
Registry dates
- Enumerated
- 2012-03-15
- Last updated
- 2025-03-25
- Certified
- 2025-03-25
Frequently asked questions
- What is Ian Tseng's NPI number?
- Ian Tseng's National Provider Identifier (NPI) is 1689949257, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ian Tseng's specialty?
- Ian Tseng is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Ian Tseng located?
- Ian Tseng's practice location on file with NPPES is 17595 Harvard Ave Ste C, Irvine, CA 92614.
- What is Ian Tseng's phone number?
- The practice phone number listed in the NPPES registry for Ian Tseng is (949) 870-9996.
- Does Ian Tseng accept Medicare?
- Ian Tseng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ian Tseng's NPI active?
- Yes — Ian Tseng's NPI (1689949257) is active in the NPPES registry as of the last update on 2025-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.