Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Christopher James Rierson, DO

Individual provider Orthopaedic Surgery Physician · NPI 1912173741

Christopher James Rierson, DO practises Orthopedic Surgery in Spencer, Iowa. Graduated from University of Iowa, Rj & L Carver College of Medicine in 1999, 27 years ago. Practices with Spencer Municipal Hospital, a 95-clinician group and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
27
Trained at
University of Iowa, Rj & L Carver College of Medicine
Licensed in
IA
In the registry since
2008
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

1200 1st Ave E Ste C
Spencer, IA 51301-4342 Not confirmed with CMS for 13 years — call before visiting
Phone: (712) 262-7511
Fax: (712) 262-3658
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 4395 (IA)

Record details

NPI number1912173741
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 1, 2008
Last updated in NPPESOctober 1, 2013

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolUNIVERSITY OF IOWA, RJ & L CARVER COLLEGE OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice Spencer Municipal Hospital — 95 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations10 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Hip replacement 40 times · 83rd percentile
Knee replacement 60 times · 83rd percentile
Lower limb (leg) arthroscopy (minimally invasive joint repair) 11 times · 81st percentile
Upper limb (arm) arthroscopy (minimally invasive joint repair) 27 times · 71st percentile
Removal of nail tissue 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients914
Services billed 5,024 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Spencer Municipal Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 95 clinicians in the practice; 12 are shown here.

Other providers in Spencer