Quick answers
- Does Landon J. Karren accept Medicare assignment?
- Yes. Medicare's clinician data says Landon J. Karren 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 Landon J. Karren see?
- In 2024, CMS data shows 277 Original Medicare patients and 3,161 services for Landon J. Karren. This counts Original Medicare only and measures volume, not quality.
- What is Landon J. Karren's NPI number?
- 1518212893. 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 Landon J. Karren, 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 | 277 |
|---|---|
| Services billed to Medicare | 3,161 |
| Different services or procedures | 42 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient complete exam of visual system (92014)271 services
- Imaging of retina (92134)210 services
- Injection of drug into eye (67028)161 services
- Injection, aflibercept, 1 mg (J0178)106 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)99 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 pressure62%
- High cholesterol56%
- Arthritis43%
- Diabetes25%
- Chronic kidney disease21%
- Depression20%
Hospitals where Landon J. Karren works
Medicare's Facility Affiliation Data lists Landon J. Karren 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.
- Intermountain Health Logan Regional HospitalLogan, UT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 460015
Practice locations
Addresses where Landon J. Karren is enrolled with Medicare (CMS data updated October 2, 2026).
- 550 E 1400, Suite PLogan, UT 84341
Group practices
Medicare enrollment lists Landon J. Karren as a member of this group (CMS data updated October 2, 2026).
- Christian D Nilson MD PC3 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Logan
Clinicians with the same Medicare primary specialty in Logan, UT — not a recommendation.
Other clinicians in Christian D Nilson MD PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518212893 |
| 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