Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Landon James Karren, DO

Individual provider Ophthalmology Physician · NPI 1518212893

Dr. Landon James Karren, DO is an Ophthalmology in Grand Forks, North Dakota. Qualified in 2012, 14 years ago. Practices with Christian D Nilson MD PC, a 3-clinician group and accepts Medicare assignment. Licensed in North Dakota and Oregon.

Years since qualifying
14
Licensed in
ND, OR
In the registry since
2012
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

4440 S Washington St - Altru Professional Ctr
Grand Forks, ND 58201-7245
Phone: (701) 732-7000
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence 15921 (ND)
Ophthalmology Physician Taxonomy 207W00000X · Licence DO176816 (OR)

Record details

NPI number1518212893
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 23, 2012
Last updated in NPPESAugust 16, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPHTHALMOLOGY
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice Christian D Nilson Md Pc — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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