Charlton Byun, M.D.
NPI 1225340961 · Diagnostic Radiology Physician · Long Beach, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charlton Byun, M.D. is a Diagnostic Radiology Physician provider in Long Beach, CA (NPI 1225340961).
Provider details
- NPI number
- 1225340961
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- C54035 (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
15 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
1,215 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, 2 Views71046 | 102 | $38 |
| X-Ray of Knee, 3 Views73562 | 90 | $46 |
| X-Ray of Hip, 2-3 Views73502 | 86 | $54 |
| X-Ray of Lower and Sacral Spine, 2-3 Views72100 | 85 | $45 |
| Mri Scan of Lower Spinal Canal Without Contrast72148 | 81 | $212 |
| X-Ray of Foot, Minimum of 3 Views73630 | 71 | $39 |
| X-Ray of Knee, 4 Or More Views |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-07-10
- Last updated
- 2021-11-29
Frequently asked questions
- What is Charlton Byun's NPI number?
- Charlton Byun's National Provider Identifier (NPI) is 1225340961, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charlton Byun's specialty?
- Charlton Byun is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Charlton Byun located?
- Charlton Byun's practice location on file with NPPES is 4241 Long Beach Blvd, Long Beach, CA 90807-2003.
- What is Charlton Byun's phone number?
- The practice phone number listed in the NPPES registry for Charlton Byun is (562) 912-2507.
- Does Charlton Byun accept Medicare?
- Charlton Byun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charlton Byun's NPI active?
- Yes — Charlton Byun's NPI (1225340961) is active in the NPPES registry as of the last update on 2021-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.