Byung Yoon, MD, PHD
NPI 1639476948 · Diagnostic Radiology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Byung Yoon, MD, PHD is a Diagnostic Radiology Physician provider in Stanford, CA (NPI 1639476948).
Provider details
- NPI number
- 1639476948
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- A128969 (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
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
204 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 | 117 | $40 |
| Ct Scan of Upper Spine Without Contrast72125 | 27 | $47 |
| Ct Scan of Blood Vessels of Neck With Contrast70498 | 17 | $80 |
| Ct Scan of Blood Vessels of Head With Contrast70496 | 16 | $84 |
| Mri Scan of Brain Without Contrast70551 | 16 | $70 |
| Mri Scan of Lower Spinal Canal Without Contrast72148 | 11 | $176 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-02-23
- Last updated
- 2022-03-02
- Certified
- 2022-03-02
Frequently asked questions
- What is Byung Yoon's NPI number?
- Byung Yoon's National Provider Identifier (NPI) is 1639476948, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Byung Yoon's specialty?
- Byung Yoon is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Byung Yoon located?
- Byung Yoon's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Byung Yoon's phone number?
- The practice phone number listed in the NPPES registry for Byung Yoon is (650) 723-4000.
- Does Byung Yoon accept Medicare?
- Byung Yoon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Byung Yoon's NPI active?
- Yes — Byung Yoon's NPI (1639476948) is active in the NPPES registry as of the last update on 2022-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.