William Dillon, MD
NPI 1386609337 · Neuroradiology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Dillon, MD is a Neuroradiology Physician provider in San Francisco, CA (NPI 1386609337).
Provider details
- NPI number
- 1386609337
- Entity type
- Individual
- Primary specialty
- Neuroradiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G47564 (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 tenure25% of score
20 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
213 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) |
|---|---|---|
| Ct Scan Head Or Brain Without Contrast70450 | 63 | $44 |
| Review By Radiologist of Ct Guidance for Needle Placement77012 | 26 | $76 |
| Mri Scan of Brain Before and After Contrast70553 | 24 | $120 |
| Ct Scan of Upper Spine Without Contrast72125 | 23 | $52 |
| Injection of Anesthetic And/Or Steroid Drug Into Sacral Spine Nerve Root Using Imaging Guidance, Single Level64483 | 21 | $140 |
| Ct Scan of Blood Vessels of Head With Contrast70496 | 16 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$117 across 1 record (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
- 2006-04-20
- Last updated
- 2008-06-06
Frequently asked questions
- What is William Dillon's NPI number?
- William Dillon's National Provider Identifier (NPI) is 1386609337, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Dillon's specialty?
- William Dillon is listed in the NPPES registry with a primary specialty of Neuroradiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Dillon located?
- William Dillon's practice location on file with NPPES is 505 Parnassus Ave, San Francisco, CA 94143-2204.
- What is William Dillon's phone number?
- The practice phone number listed in the NPPES registry for William Dillon is (415) 353-1668.
- Does William Dillon accept Medicare?
- William Dillon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Dillon's NPI active?
- Yes — William Dillon's NPI (1386609337) is active in the NPPES registry as of the last update on 2008-06-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.