Quick answers
- Which hospitals does Lukasz K. Janeczek work at?
- Medicare's official clinician data lists Lukasz K. Janeczek at 3 hospitals: Antelope Valley Hospital, California Hospital Medical Center LA and Memorial Hospital of Gardena. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Lukasz K. Janeczek see patients?
- Medicare's clinician data lists 2 practice locations, including Lancaster, CA and S El Monte, CA. Call before your visit to confirm the address.
- What is Lukasz K. Janeczek's specialty?
- Medicare lists Family Practice as the primary specialty, and also Hospitalist.
- Does Lukasz K. Janeczek accept Medicare assignment?
- Yes. Medicare's clinician data says Lukasz K. Janeczek 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 Lukasz K. Janeczek?
- (661) 942-8463, as listed in official Medicare / NPI Registry data.
- What is Lukasz K. Janeczek's NPI number?
- 1023217502. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Lukasz K. Janeczek works
Medicare's Facility Affiliation Data lists Lukasz K. Janeczek at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Antelope Valley HospitalLancaster, CA · Acute Care Hospital · CCN 050056
- California Hospital Medical Center LALos Angeles, CA · Acute Care Hospital · CCN 050149
- Memorial Hospital of GardenaGardena, CA · Acute Care Hospital · CCN 050468
Practice locations
Addresses where Lukasz K. Janeczek is enrolled with Medicare (CMS data updated 2026-10-02).
- 1642 W Ave JLancaster, CA 93534 (661) 942‑8463
- 1701 Santa Anita AveS El Monte, CA 91733 (626) 579‑7777
Group practices
Medicare enrollment lists Lukasz K. Janeczek as a member of these groups (CMS data updated 2026-10-02).
- Hospitalist Group of Montebello Inc58 clinicians in the group
- Horizon Multicare Group Inc28 clinicians in the group
Specialties
- Family Practiceprimary
- Hospitalistalso
Other family doctors in Lancaster
Clinicians with the same Medicare primary specialty in Lancaster, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023217502 |
| 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