Karthi Namasivayam, M.D.
NPI 1437145448 · Psychiatry Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karthi Namasivayam, M.D. is a Psychiatry Physician provider in Knoxville, TN (NPI 1437145448).
Provider details
- NPI number
- 1437145448
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 42956 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Bupropion Hclbrand: Bupropion Xl | 117 | 34 |
| Aripiprazole | 106 | 22 |
| Duloxetine Hcl | 82 | 21 |
| Quetiapine Fumarate | 69 | 18 |
| Trazodone Hcl | 65 | 16 |
| Alprazolam | 59 | — |
| Olanzapine | 58 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$35,924 across 61 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 201 W Springdale AveKnoxville, TN 37917-5158Phone: (865) 637-9711
Registry dates
- Enumerated
- 2005-09-26
- Last updated
- 2018-07-26
Frequently asked questions
- What is Karthi Namasivayam's NPI number?
- Karthi Namasivayam's National Provider Identifier (NPI) is 1437145448, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karthi Namasivayam's specialty?
- Karthi Namasivayam is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Karthi Namasivayam located?
- Karthi Namasivayam's practice location on file with NPPES is 200 Prosperity Dr, Knoxville, TN 37923.
- What is Karthi Namasivayam's phone number?
- The practice phone number listed in the NPPES registry for Karthi Namasivayam is (865) 824-2828.
- Does Karthi Namasivayam accept Medicare?
- Karthi Namasivayam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karthi Namasivayam's NPI active?
- Yes — Karthi Namasivayam's NPI (1437145448) is active in the NPPES registry as of the last update on 2018-07-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.