Jiwon Youm, M.D.
NPI 1265876478 · Vascular & Interventional Radiology Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jiwon Youm, M.D. is a Vascular & Interventional Radiology Physician provider in Walnut Creek, CA (NPI 1265876478).
Provider details
- NPI number
- 1265876478
- Entity type
- Individual
- Primary specialty
- Vascular & Interventional Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A138033 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,417 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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, 1 View71045 | 392 | $10 |
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes99152 | 144 | $14 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 115 | $24 |
| X-Ray of Chest, 2 Views71046 | 112 | $12 |
| Ct Scan of Heart With Evaluation of Blood Vessel Calcium75571 | 92 | $32 |
| Ct Scan of Chest Without Contrast71250 | 83 | $60 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$70 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-18
- Last updated
- 2023-12-12
- Certified
- 2023-12-12
Frequently asked questions
- What is Jiwon Youm's NPI number?
- Jiwon Youm's National Provider Identifier (NPI) is 1265876478, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jiwon Youm's specialty?
- Jiwon Youm is listed in the NPPES registry with a primary specialty of Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Jiwon Youm located?
- Jiwon Youm's practice location on file with NPPES is 2125 Oak Grove Rd Ste 200, Walnut Creek, CA 94598-2520.
- What is Jiwon Youm's phone number?
- The practice phone number listed in the NPPES registry for Jiwon Youm is (252) 967-1509.
- Does Jiwon Youm accept Medicare?
- Jiwon Youm is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jiwon Youm's NPI active?
- Yes — Jiwon Youm's NPI (1265876478) is active in the NPPES registry as of the last update on 2023-12-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.