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

Individual provider Orthopaedic Surgery Physician · NPI 1912389974

Dr. Andrew Mitchelson, MD practises Orthopedic Surgery in Saint Louis, Missouri. Graduated from Southern Illinois University School of Medicine in 2015, 11 years ago. Practices with Orthopaedic Surgery Associates of Marquette PC, a 26-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Illinois, Michigan and Missouri.

Years since qualifying
11
Trained at
Southern Illinois University School of Medicine
Licensed in
IL, MI, MO
In the registry since
2015
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2325 Dougherty Ferry Rd Ste 100A
Saint Louis, MO 63122-3356
Phone: (314) 909-1359
Fax: (314) 909-1370
Show map & directions

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

Additional practice locations (3)

  • 701 N 1st St, Springfield, IL 62702-3757 — (217) 545-8000
  • 1414 W Fair Ave Ste 190, Marquette, MI 49855-5406 — (906) 225-1321
  • 300 State St Ste 205, Erie, PA 16507-1429 — (814) 877-6253

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 2025038859 (MO)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 4301503918 (MI)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 125.067589 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1912389974
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 25, 2015
Last updated in NPPESOctober 28, 2025
Certification dateOctober 28, 2025

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Also practisesHAND SURGERY
Medical schoolSOUTHERN ILLINOIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2015 (11 years in practice)
Group practice Orthopaedic Surgery Associates Of Marquette Pc — 26 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 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.

Removal of 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 patients321
Services billed 2,509 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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. Those with a page here are linked.

Also affiliated with 1 inpatient rehabilitation facility, which CMS identifies by certification number only.

Colleagues at Orthopaedic Surgery Associates of Marquette PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 26 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis