Gregory L. Gass, MD
Psychiatry Physician · Knoxville, TN
Gregory L. Gass, MD is a psychiatry physician with a practice address in Knoxville, Tennessee, and NPI 1699733113, issued on May 3, 2006. Check the license (Tennessee MD16538, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Gregory L. Gass
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- MD16538 TN
251454 NY
Self-reported in NPPES; status is on the state search - Practice location
- 234 Morrell RD, Knoxville, TN 37919
- Phone
- (865) 766-0092
- Enumerated
- May 3, 2006
- Record last updated
- Oct 10, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (865) 766-0182
- Medicaid ID
- 3895808 TN
- Medicare enrollment
- Enrolled (PECOS I20170516000350); may accept Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 731 in Tennessee → Look up another NPI →
Verify Gregory L. Gass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD16538Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average psychiatry physician in 2024
16 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $46.13
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northeast Behavioral Health LLCDartmouth, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory L. Gass among 731 psychiatry physician records in Tennessee
Gregory L. Gass, MD is one of 731 psychiatry physician records with a practice address in Tennessee. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated1984 · median 2003 among the 329 with a school on file
- Record last updated2011 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Tennessee
There are 731 psychiatry physician records in Tennessee.
All 731 in Tennessee → Every provider in Knoxville → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Sharon Burnside, M.D.Knoxville, TN 379191043231319
- Kenneth Carpenter, MDKnoxville, TN 379191427169929
- Lane Cook, M.D.Knoxville, TN 379191174509590
- Jerry Embry, M.D.Knoxville, TN 379191427184696
- Otilia Faget, MDKnoxville, TN 379191780651521
- Edwin Jones, M.D., PH.D.Knoxville, TN 379191740398684
- James Kennedy, M.D.Knoxville, TN 379191780698985
- Heaza Kim, MDKnoxville, TN 379191578609533
Common questions
What is Gregory L. Gass, MD's NPI number?
Gregory L. Gass, MD's National Provider Identifier (NPI) is 1699733113, issued on May 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory L. Gass, MD located?
The NPPES record lists a practice address at 234 Morrell RD, Knoxville, TN, 37919. Phone: (865) 766-0092. Providers update this record themselves, so call before visiting.
How can I verify Gregory L. Gass, MD's license?
NPPES lists Tennessee license number MD16538, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory L. Gass, MD prescribe under Medicare Part D?
In 2024, Gregory L. Gass, MD had 16 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.