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Conor O'Halloran
NPI 1265894141 · Pediatric Cardiology Physician · Chicago, IL
Conor O'Halloran is a Pediatric Cardiology Physician provider in Chicago, IL (NPI 1265894141).
Provider details
- NPI number
- 1265894141
- Entity type
- Individual
- Primary specialty
- Pediatric Cardiology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 036148582 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(81/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
4 documented practice locations
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
225 E Chicago Ave
Chicago, IL 60611-2991
Phone: (800) 543-7362
Street-level locationGet directions
Mailing address
225 E Chicago Ave
Chicago, IL 60611-2991
Additional practice locations (3)
- 251 E Huron StChicago, IL 60611-2908Phone: (312) 227-4100
- 1620 W Harrison StChicago, IL 60612-3801Phone: (312) 227-4000
- 2515 N Clark StChicago, IL 60614-2730Phone: (312) 227-4100
Registry dates
- Enumerated
- 2016-03-22
- Last updated
- 2025-07-22
- Certified
- 2025-07-22
Frequently asked questions
- What is Conor O'Halloran's NPI number?
- Conor O'Halloran's National Provider Identifier (NPI) is 1265894141, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Conor O'Halloran's specialty?
- Conor O'Halloran is listed in the NPPES registry with a primary specialty of Pediatric Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Conor O'Halloran located?
- Conor O'Halloran's practice location on file with NPPES is 225 E Chicago Ave, Chicago, IL 60611-2991.
- What is Conor O'Halloran's phone number?
- The practice phone number listed in the NPPES registry for Conor O'Halloran is (800) 543-7362.
- Is Conor O'Halloran's NPI active?
- Yes — Conor O'Halloran's NPI (1265894141) is active in the NPPES registry as of the last update on 2025-07-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.