Quick answers
- Where does John J. Napierkowski see patients?
- Medicare's clinician data lists 1 practice location in Lafayette, CO. Call before your visit to confirm the address.
- What is John J. Napierkowski's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does John J. Napierkowski accept Medicare assignment?
- Yes. Medicare's clinician data says John J. Napierkowski 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 J. Napierkowski?
- (303) 338-4545, as listed in official Medicare / NPI Registry data.
- What is John J. Napierkowski's NPI number?
- 1801877683. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John J. Napierkowski is enrolled with Medicare (CMS data updated 2026-10-02).
- 280 Exempla Circle, Kaiser Permanente Rock Creek MedicaLafayette, CO 80026 (303) 338‑4545
Group practices
Medicare enrollment lists John J. Napierkowski as a member of this group (CMS data updated 2026-10-02).
- Colorado Permanente Medical Group PC1,327 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Lafayette
Clinicians with the same Medicare primary specialty in Lafayette, CO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801877683 |
| 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
- 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