William O'Reilly, M.D.
NPI 1437124625 · Hematology & Oncology Physician · Palos Heights, IL
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William O'Reilly, M.D. is a Hematology & Oncology Physician provider in Palos Heights, IL (NPI 1437124625).
Provider details
- NPI number
- 1437124625
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036053590 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-21
- Last updated
- 2010-03-02
Frequently asked questions
- What is William O'Reilly's NPI number?
- William O'Reilly's National Provider Identifier (NPI) is 1437124625, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William O'Reilly's specialty?
- William O'Reilly is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William O'Reilly located?
- William O'Reilly's practice location on file with NPPES is 12150 S Harlem Ave, Palos Heights, IL 60463-1435.
- What is William O'Reilly's phone number?
- The practice phone number listed in the NPPES registry for William O'Reilly is (708) 361-4778.
- Does William O'Reilly accept Medicare?
- William O'Reilly is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William O'Reilly's NPI active?
- Yes — William O'Reilly's NPI (1437124625) is active in the NPPES registry as of the last update on 2010-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.