Karthi S. Namasivayam, M.D.
Psychiatry Physician · Knoxville, TN
Karthi S. Namasivayam, M.D. is a psychiatry physician with a practice address in Knoxville, Tennessee, and NPI 1437145448, issued on Sep 26, 2005. Check the license (Tennessee 42956, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Karthi S. Namasivayam
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 42956 TN
Self-reported in NPPES; status is on the state search - Practice location
- 200 Prosperity Dr, Knoxville, TN 37923
- Phone
- (865) 824-2828
- Enumerated
- Sep 26, 2005
- Record last updated
- Jul 26, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (865) 966-8945
- Medicaid ID
- 3001246 TN
- Medicare enrollment
- Enrolled (PECOS I20210730002121); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 731 in Tennessee → Look up another NPI →
Also registered at 200 Prosperity Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- David BenwayBehavior Technician1154296291
- Morgan BondBehavior Technician1083568661
- Jennifer BorthBehavior Technician1962378612
Verify Karthi S. Namasivayam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 42956Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% more Medicare Part D claims than the average psychiatry physician in 2024
1,246 Medicare Part D claims for 125 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Bupropion Xl117 claims
- Aripiprazole106 claims
- Duloxetine Hcl82 claims
- Quetiapine Fumarate69 claims
- Trazodone Hcl65 claims
- Alprazolam59 claims
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: $35,924.07
61 payments; by number, the most common kind was food and beverage; the largest payer was Alkermes, 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 2 group practices
- Grace Health IncBattle Creek, MI
- Total Recovery Mind And Body PLLCKnoxville, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karthi S. Namasivayam among 731 psychiatry physician records in Tennessee
Karthi S. Namasivayam, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated1989 · median 2003 among the 329 with a school on file
- Record last updated2018 · 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
- James Alexander, M.D.Knoxville, TN 379231922047141
- Wayne Curfman, MDKnoxville, TN 379231891807152
- Rebecca Halperin, MDKnoxville, TN 379231942363833
- Kris Houser, MDKnoxville, TN 379231992798284
- Pradumna Jain, MDKnoxville, TN 379231306950126
- Mujeeb Khan, MDKnoxville, TN 379231417924002
- Glenn Peterson, MDKnoxville, TN 379231427026913
- Philomina Presentation, M.D.Knoxville, TN 379231194794933
Common questions
What is Karthi S. Namasivayam, M.D.'s NPI number?
Karthi S. Namasivayam, M.D.'s National Provider Identifier (NPI) is 1437145448, issued on Sep 26, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Karthi S. Namasivayam, M.D. located?
The NPPES record lists a practice address at 200 Prosperity Dr, Knoxville, TN, 37923. Phone: (865) 824-2828. Providers update this record themselves, so call before visiting.
How can I verify Karthi S. Namasivayam, M.D.'s license?
NPPES lists Tennessee license number 42956, 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 Karthi S. Namasivayam, M.D. prescribe under Medicare Part D?
In 2024, Karthi S. Namasivayam, M.D. had 1,246 Medicare Part D claims for 125 beneficiaries; 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.