William Keenan, M.D.
NPI 1366547259 · Diagnostic Radiology Physician · Hoffman Estates, IL
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Keenan, M.D. is a Diagnostic Radiology Physician provider in Hoffman Estates, IL (NPI 1366547259).
Provider details
- NPI number
- 1366547259
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036084949 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
2,680 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 | 512 | $8 |
| Ct Scan Head Or Brain Without Contrast70450 | 227 | $38 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 130 | $78 |
| Mri Scan of Brain Without Contrast70551 | 124 | $67 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 115 | $20 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 106 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-14
- Last updated
- 2012-03-14
Frequently asked questions
- What is William Keenan's NPI number?
- William Keenan's National Provider Identifier (NPI) is 1366547259, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Keenan's specialty?
- William Keenan is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Keenan located?
- William Keenan's practice location on file with NPPES is 1555 Barrington Rd, Hoffman Estates, IL 60194-1019.
- What is William Keenan's phone number?
- The practice phone number listed in the NPPES registry for William Keenan is (847) 843-2000.
- Does William Keenan accept Medicare?
- William Keenan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Keenan's NPI active?
- Yes — William Keenan's NPI (1366547259) is active in the NPPES registry as of the last update on 2012-03-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.