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

Christopher Michael Sizemore, DO

Individual provider Obstetrics & Gynecology Physician · NPI 1891842688

Christopher Michael Sizemore, DO practises Obstetrics/Gynecology in Nashville, Tennessee. Qualified in 2005, 21 years ago. Practices with Diana Health Tn, PC, a 52-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Tennessee and Texas.

Years since qualifying
21
Licensed in
TN, TX
In the registry since
2007
Specialties on file
2
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

3601 Tvc
Nashville, TN 37232-0001
Phone: (615) 322-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1120 Raintree Cir Ste 280, Allen, TX 75013-5258 — (972) 635-3469

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 2019 (TN)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence W7948 (TX)

Record details

NPI number1891842688
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJanuary 4, 2007
Last updated in NPPESOctober 1, 2026
Certification dateOctober 1, 2026

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolOTHER
Graduated 2005 (21 years in practice)
Group practice Diana Health Tn, Pc — 52 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients11
Services billed 18 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

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 $208 10 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.

Colleagues at Diana Health Tn, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 52 clinicians in the practice; 12 are shown here.

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