James Yoon, M.D.
NPI 1609227388 · Diagnostic Radiology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Yoon, M.D. is a Diagnostic Radiology Physician provider in Stanford, CA (NPI 1609227388).
Provider details
- NPI number
- 1609227388
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A171697 (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
9 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
1,165 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 | 246 | $40 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 114 | $87 |
| Ct Scan of Upper Spine Without Contrast72125 | 97 | $47 |
| X-Ray of Chest, 2 Views71046 | 82 | $11 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 62 | $21 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 56 | $84 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-06-24
- Last updated
- 2021-07-07
- Certified
- 2021-07-07
Frequently asked questions
- What is James Yoon's NPI number?
- James Yoon's National Provider Identifier (NPI) is 1609227388, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Yoon's specialty?
- James Yoon is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is James Yoon located?
- James Yoon's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is James Yoon's phone number?
- The practice phone number listed in the NPPES registry for James Yoon is (650) 723-4000.
- Does James Yoon accept Medicare?
- James Yoon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Yoon's NPI active?
- Yes — James Yoon's NPI (1609227388) is active in the NPPES registry as of the last update on 2021-07-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.