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

MS. Mary Wallace Darden, APN

Individual provider Family Nurse Practitioner · NPI 1144209495

MS. Mary Wallace Darden, APN is a Nurse Practitioner in Nashville, Tennessee. Graduated from Vanderbilt University School of Medicine in 1996, 30 years ago. Practices with Tennessee Oncology PLLC, a 354-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Tennessee.

Years since qualifying
30
Trained at
Vanderbilt University School of Medicine
Licensed in
TN
In the registry since
2006
What do these letters mean?
APN — Advanced Practice Nurse
The umbrella title some states use for nurse practitioners and other advanced practice nurses.

See every abbreviation used in this directory →

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Practice location Address checks out

300 20th Ave N Ste 301
Nashville, TN 37203-2131 Not confirmed with CMS for 12 years — call before visiting
Phone: (615) 329-0570
Fax: (615) 320-7091
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 6544 (TN)

Record details

NPI number1144209495
Entity typeIndividual (Type 1)
GenderFemale
Credentials APN
Sole proprietorNo
NPI enumeratedJanuary 14, 2006
Last updated in NPPESJune 12, 2014

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolVANDERBILT UNIVERSITY SCHOOL OF MEDICINE
Graduated 1996 (30 years in practice)
Group practice Tennessee Oncology Pllc — 354 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations7 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 patients91
Services billed 153 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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 $1,563 56 payments · a meal or drink at a meeting or visit, not a fee
Education $100 1 payment · educational material or training, 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 Tennessee Oncology PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 354 clinicians in the practice; 12 are shown here.

Other providers in Nashville