Marc Willis, MD
NPI 1255494969 · Diagnostic Radiology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Willis, MD is a Diagnostic Radiology Physician provider in Stanford, CA (NPI 1255494969).
Provider details
- NPI number
- 1255494969
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- L4809 (TX)
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
19 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
3,074 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, 1 View71045 | 191 | $9 |
| X-Ray of Knee, 3 Views73562 | 168 | $23 |
| X-Ray of Shoulder, Minimum of 2 Views73030 | 158 | $18 |
| X-Ray of Foot, Minimum of 3 Views73630 | 150 | $17 |
| X-Ray of Pelvis, 1-2 Views72170 | 126 | $10 |
| X-Ray of Hip, 2-3 Views73502 | 111 | $25 |
| X-Ray for Bone Length Assessment77073 | 103 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-18
- Last updated
- 2024-04-05
- Certified
- 2024-04-05
Frequently asked questions
- What is Marc Willis's NPI number?
- Marc Willis's National Provider Identifier (NPI) is 1255494969, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Willis's specialty?
- Marc Willis is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Willis located?
- Marc Willis's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Marc Willis's phone number?
- The practice phone number listed in the NPPES registry for Marc Willis is (650) 723-4000.
- Does Marc Willis accept Medicare?
- Marc Willis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Willis's NPI active?
- Yes — Marc Willis's NPI (1255494969) is active in the NPPES registry as of the last update on 2024-04-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.