Alexander Chien, MD
NPI 1255313318 · Diagnostic Radiology Physician · Pomona, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Chien, MD is a Diagnostic Radiology Physician provider in Pomona, CA (NPI 1255313318).
Provider details
- NPI number
- 1255313318
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- A82949 (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
20 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
190 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 of Chest With Contrast71260 | 34 | $53 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 34 | $85 |
| Ct Scan of Chest Without Contrast71250 | 29 | $51 |
| Nuclear Medicine Study From Skull Base to Mid-Thigh With Ct Scan78815 | 22 | $112 |
| X-Ray of Chest, 2 Views71046 | 17 | $10 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 16 | $82 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-15
- Last updated
- 2007-07-08
Frequently asked questions
- What is Alexander Chien's NPI number?
- Alexander Chien's National Provider Identifier (NPI) is 1255313318, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Chien's specialty?
- Alexander Chien is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Chien located?
- Alexander Chien's practice location on file with NPPES is 1798 N Garey Ave, Pomona, CA 91767.
- What is Alexander Chien's phone number?
- The practice phone number listed in the NPPES registry for Alexander Chien is (909) 865-9500.
- Does Alexander Chien accept Medicare?
- Alexander Chien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Chien's NPI active?
- Yes — Alexander Chien's NPI (1255313318) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.