Quick answers
- Which hospitals does John Colleran work at?
- Medicare's official clinician data lists John Colleran at 4 hospitals: Baptist Health Medical Center North Little Rock, CHI St Vincent Morrilton, Chi-St Vincent Infirmary and St Vincent Medical Center/North. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Colleran see patients?
- Medicare's clinician data lists 1 practice location in Little Rock, AR. Call before your visit to confirm the address.
- What is John Colleran's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does John Colleran accept Medicare assignment?
- Yes. Medicare's clinician data says John Colleran accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John Colleran?
- (501) 255-6000, as listed in official Medicare / NPI Registry data.
- What is John Colleran's NPI number?
- 1265494231. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Colleran works
Medicare's Facility Affiliation Data lists John Colleran at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Baptist Health Medical Center North Little RockNorth Little Rock, AR · Acute Care Hospital · CCN 040036
- CHI St Vincent MorriltonMorrilton, AR · Critical Access Hospital · CCN 041324
- Chi-St Vincent InfirmaryLittle Rock, AR · Acute Care Hospital · CCN 040007
- St Vincent Medical Center/NorthSherwood, AR · Acute Care Hospital · CCN 040137
Practice locations
Addresses where John Colleran is enrolled with Medicare (CMS data updated 2026-10-02).
- 10100 Kanis RdLittle Rock, AR 72205 (501) 255‑6000
Group practices
Medicare enrollment lists John Colleran as a member of this group (CMS data updated 2026-10-02).
- St Vincent Infirmary Medical Center39 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Arkansas →
Other cardiologists in Little Rock
Clinicians with the same Medicare primary specialty in Little Rock, AR — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265494231 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians