William Rule, M.D.
NPI 1538346606 · Radiation Oncology Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Rule, M.D. is a Radiation Oncology Physician provider in Phoenix, AZ (NPI 1538346606).
Provider details
- NPI number
- 1538346606
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 44461 (AZ)
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
18 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
1,991 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) |
|---|---|---|
| Stereoscopic X-Ray Guidance for Localization of Target Volume for the Delivery of Radiation TherapyG6002 | 788 | $20 |
| Calculation of Radiation Therapy Dose77300 | 236 | $31 |
| Design and Construction of Complex Radiation Treatment Device77334 | 224 | $58 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 176 | $183 |
| Complex Radiation Therapy Planning77263 | 90 | $162 |
| High Precision Radiation Therapy Planning77301 | 69 | $404 |
| Design and Construction of Radiation Treatment Device for High Precision Radiation Therapy |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-01-30
- Last updated
- 2020-09-08
- Certified
- 2020-09-08
Frequently asked questions
- What is William Rule's NPI number?
- William Rule's National Provider Identifier (NPI) is 1538346606, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Rule's specialty?
- William Rule is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Rule located?
- William Rule's practice location on file with NPPES is 5777 E Mayo Blvd, Phoenix, AZ 85054-4502.
- What is William Rule's phone number?
- The practice phone number listed in the NPPES registry for William Rule is (480) 301-8000.
- Does William Rule accept Medicare?
- William Rule is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Rule's NPI active?
- Yes — William Rule's NPI (1538346606) is active in the NPPES registry as of the last update on 2020-09-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.