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

Matthew Neff

Individual provider Gastroenterology Physician · NPI 1801030523

Matthew Neff practises Internal Medicine in Nashville, Tennessee. Graduated from East Tennessee State University Quillen College of Medicine in 2009, 17 years ago. Practices with Columbia Medical Group - the Frist Clinic Inc, a 56-clinician group and accepts Medicare assignment. Licensed in Louisiana and Tennessee.

Years since qualifying
17
Trained at
East Tennessee State University Quillen College of Medicine
Licensed in
LA, TN
In the registry since
2009
Specialties on file
4
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Practice location Address checks out

330 23rd Ave N Ste 300
Nashville, TN 37203-1534
Phone: (615) 342-6010
Fax: (615) 342-7898
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 48473 (TN)
Gastroenterology Physician Taxonomy 207RG0100X · Licence MD.206270 (LA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 48473 (TN)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1801030523
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedApril 24, 2009
Last updated in NPPESOctober 10, 2025
Certification dateOctober 10, 2025

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolEAST TENNESSEE STATE UNIVERSITY QUILLEN COLLEGE OF MEDICINE
Graduated 2009 (17 years in practice)
Group practice Columbia Medical Group - The Frist Clinic Inc — 56 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 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.

Colonoscopy 194 times · 93rd percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 232 times · 92nd 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 patients349
Services billed 767 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 $3,521 213 payments · a meal or drink at a meeting or visit, not a fee
Consulting Fee $1,200 1 payment
Education $9 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.

Practises at

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

Colleagues at Columbia Medical Group - the Frist Clinic Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 56 clinicians in the practice; 12 are shown here.

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