Quick answers
- Does Andrew J. Leiker accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew J. Leiker accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Andrew J. Leiker see?
- In 2024, CMS data shows 585 Original Medicare patients and 3,886 services for Andrew J. Leiker. This counts Original Medicare only and measures volume, not quality.
- What is Andrew J. Leiker's NPI number?
- 1568859023. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Andrew J. Leiker, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 585 |
|---|---|
| Services billed to Medicare | 3,886 |
| Different services or procedures | 43 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Ct guidance for insertion of radiation therapy fields (77014)846 services
- Calculation of radiation therapy dose (77300)507 services
- Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session (G6015)469 services
- Design and construction of complex radiation treatment device (77334)283 services
- Radiation treatment management, 5 treatment sessions (77427)244 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- High cholesterol68%
- Arthritis40%
- Diabetes31%
- COPD27%
Hospitals where Andrew J. Leiker works
Medicare's Facility Affiliation Data lists Andrew J. Leiker at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Boone Hospital CenterColumbia, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260068
- Lake Regional Health SystemOsage Beach, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260186
- University of Missouri Health CareColumbia, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260141
Practice locations
Addresses where Andrew J. Leiker is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Hospital DrColumbia, MO 65212 (573) 882‑4141
- 1705 E Broadway, Suite 100Columbia, MO 65201 (573) 874‑7800
- 404 N Keene StColumbia, MO 65201 (573) 875‑9000
- 54 Hospital DrOsage Beach, MO 65065 (573) 302‑2772
Group practices
Medicare enrollment lists Andrew J. Leiker as a member of these groups (CMS data updated October 2, 2026).
- The Curators of the University of Missouri1,131 clinicians in the group
- Lake Regional Health System138 clinicians in the group
- Missouri Cancer Associates LLC22 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Columbia
Clinicians with the same Medicare primary specialty in Columbia, MO — not a recommendation.
Other clinicians in The Curators of the University of Missouri
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 2015 (11 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568859023 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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