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

Dr. Patrick Mark O'Brien, MD

Individual provider Orthopaedic Surgery Physician · NPI 1861615155

Dr. Patrick Mark O'Brien, MD practises Orthopedic Surgery in Sioux Falls, South Dakota. Graduated from Creighton University School of Medicine in 2007, 19 years ago. Practices with Avera McKennan, a 962-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in North Carolina and South Dakota.

Years since qualifying
19
Trained at
Creighton University School of Medicine
Licensed in
NC, SD
In the registry since
2007
Specialties on file
2
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

911 E 20th St Ste 300
Sioux Falls, SD 57105-1045
Phone: (605) 322-1300
Fax: (605) 322-1301
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 6100 S Louise Ave Ste 2100, Sioux Falls, SD 57108-6021 — (605) 504-1100

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 10105 (SD)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 2014-01725 (NC)

Record details

NPI number1861615155
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 11, 2007
Last updated in NPPESOctober 31, 2019

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolCREIGHTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Avera McKennan — 962 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.

Lower limb (leg) arthroscopy (minimally invasive joint repair) 20 times · 92nd percentile
Upper limb (arm) arthroscopy (minimally invasive joint repair) 39 times · 81st percentile

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 patients205
Services billed 743 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $72 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Hegg Memorial Health Center Hospital · Rock Valley, IA
  • Sioux Center Health Hospital · Sioux Center, IA
  • Avera McKennan Hospital & University Health Center Hospital · Sioux Falls, SD
  • Avera Merrill Pioneer Hospital Hospital · Rock Rapids, IA
  • Unc Health Nash Hospital · Rocky Mount, NC

Colleagues at Avera McKennan

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 962 clinicians in the practice; 12 are shown here.

Other providers in Sioux Falls