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

Richard J Kozeny Jr., MD

Individual provider Internal Medicine Physician · NPI 1255319810

Richard J Kozeny Jr., MD practises Internal Medicine in Chesterfield, Missouri. Graduated from Medical College of Wisconsin in 1995, 31 years ago. Practices with Chesterfield Internal Medicine and Rheumatology, LLC, a 7-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Iowa and Missouri.

Years since qualifying
31
Trained at
Medical College of Wisconsin
Licensed in
IA, MO
In the registry since
2006
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

226 S Woods Mill Rd Ste 43 W
Chesterfield, MO 63017-3662 Not confirmed with CMS for 13 years — call before visiting
Phone: (314) 205-6444
Fax: (314) 205-6433
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2012037325 (MO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 34243 (IA)

Record details

NPI number1255319810
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 4, 2006
Last updated in NPPESJune 5, 2013

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 1995 (31 years in practice)
Group practice Chesterfield Internal Medicine And Rheumatology, Llc — 7 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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 patients502
Services billed 1,561 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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 $2,376 134 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.

  • Barnes-Jewish West County Hospital Hospital · Creve Coeur, MO · listed as Barnes Jewish West County Hospital
  • Mercy Hospital St Louis Hospital · Saint Louis, MO · listed as Mercy Hospitals East Communities Mercy Hospital St Louis
  • St Lukes Hospital Hospital · Chesterfield, MO
  • Aw Health Care Home health agency · Saint Louis, MO · listed as Aw Health Care Inc
  • Ssm St Clare Health Center Hospital · Fenton, MO
  • Elite Home Health Home health agency · Creve Coeur, MO
  • Mercy Home Health Home health agency · Saint Louis, MO
  • Premiere Home Health Home health agency · Saint Charles, MO
  • St Luke'S Home Health Services Home health agency · Chesterfield, MO

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

Colleagues at Chesterfield Internal Medicine and Rheumatology, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 7 clinicians in the practice; 5 are shown here.

Other providers in Chesterfield