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

Dr. Clayton Hartwick Riley, MD

Individual provider Orthopaedic Surgery Physician · NPI 1700080389

Dr. Clayton Hartwick Riley, MD practises Orthopedic Surgery in Little Rock, Arkansas. Graduated from University of Arkansas College of Medicine in 2006, 20 years ago. Practices with Martin Knee and Sports Medicine Center, PA, a 9-clinician group and accepts Medicare assignment. Licensed in Arkansas and Texas.

Years since qualifying
20
Trained at
University of Arkansas College of Medicine
Licensed in
AR, TX
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

5320 W Markham
Little Rock, AR 72205
Phone: (501) 975-5633
Fax: (501) 227-0710
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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 E6967 (AR)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence P0122 (TX)

Record details

NPI number1700080389
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 14, 2007
Last updated in NPPESDecember 28, 2016

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolUNIVERSITY OF ARKANSAS COLLEGE OF MEDICINE
Graduated 2006 (20 years in practice)
Group practice Martin Knee And Sports Medicine Center, Pa — 9 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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.

Upper limb (arm) arthroscopy (minimally invasive joint repair) 95 times · 95th percentile
Lower limb (leg) arthroscopy (minimally invasive joint repair) 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 patients517
Services billed 4,547 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.

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 $252 5 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.

  • Arkansas Surgical Hospital Hospital · No Little Rock, AR · listed as Arkansas Surgical Hospital, LLC
  • Baptist Health Medical Center Heber Springs Hospital · Heber Springs, AR · listed as Baptist Medical Center Heber Springs
  • Baptist Health Inpatient rehabilitation facility · Little Rock, AR
  • Ashley County Medical Center Hospital · Crossett, AR
  • Baptist Health Medical Center North Little Rock Hospital · North Little Rock, AR

Colleagues at Martin Knee and Sports Medicine Center, PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 9 clinicians in the practice; 6 are shown here.

Other providers in Little Rock