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

Matthew C Mascioli, DO

Individual provider Internal Medicine Physician · NPI 1225615933

Matthew C Mascioli, DO practises Sleep Medicine in Knoxville, Tennessee. Graduated from Lincoln Mem Univ, Debusk Col of Osteopathic Med in 2021, 5 years ago. Practices with Summit Medical Group, PLLC, a 636-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Indiana and Tennessee.

Years since qualifying
5
Trained at
Lincoln Mem Univ, Debusk Col of Osteopathic Med
Licensed in
IN, TN
In the registry since
2021
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

1267 Dick Lonas Rd Ste 200
Knoxville, TN 37909-1326
Phone: (865) 909-0744
Fax: (833) 908-2120
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1120 W Michigan St, Indianapolis, IN 46202-5209 — (317) 278-0042

Specialties & licences

Sleep Medicine (Internal Medicine) Physician (primary) Taxonomy 207RS0012X · Licence 6295 (TN)
Internal Medicine Physician Taxonomy 207R00000X · Licence 02007815A (IN)

Record details

NPI number1225615933
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 27, 2021
Last updated in NPPESApril 28, 2026
Certification dateApril 28, 2026

Medicare enrollment

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

Medicare specialtySLEEP MEDICINE
Medical schoolLINCOLN MEM UNIV, DEBUSK COL OF OSTEOPATHIC MED
Graduated 2021 (5 years in practice)
Group practice Summit Medical Group, Pllc — 636 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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.

Travel and Lodging $1,081 15 payments · travel or lodging paid or reimbursed, such as to attend a conference
Food and Beverage $742 13 payments · a meal or drink at a meeting or visit, not a fee
Education $90 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 Summit Medical Group, PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 636 clinicians in the practice; 12 are shown here.

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