Tejaswini R. Nayak, M.D.
Internal Medicine Physician · Saint Charles, MO
Tejaswini R. Nayak, M.D. is an internal medicine physician with a practice address in Saint Charles, Missouri, and NPI 1609841303, issued on Feb 17, 2006. Check the license (Missouri 2002015974, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Tejaswini R. Nayak
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2002015974 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1820 Zumbehl RD, Saint Charles, MO 63303
- Phone
- (636) 928-1237
- Enumerated
- Feb 17, 2006
- Record last updated
- Sep 5, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (636) 928-0397
- Medicare enrollment
- Enrolled (PECOS I20040407000531); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 1820 Zumbehl RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pamela Buchanan, M.D.Family Medicine Physician1164633111
- Bilal Quadri, MDFamily Medicine Physician1427623370
Verify Tejaswini R. Nayak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2002015974Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average internal medicine physician in 2024
7,777 Medicare Part D claims for 431 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 121 claims were for opioids.
Most prescribed
- Atorvastatin Calcium423 claims
- Amlodipine Besylate284 claims
- Pantoprazole Sodium263 claims
- Levothyroxine Sodium256 claims
- Omeprazole236 claims
- Losartan Potassium183 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: $120.37
6 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Mercy Clinic East CommunitiesSaint Charles, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tejaswini R. Nayak among 2,604 internal medicine physician records in Missouri
Tejaswini R. Nayak, M.D. is one of 2,604 internal medicine physician records with a practice address in Missouri. 77% 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, 59% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated1997 · median 2006 among the 1,443 with a school on file
- Record last updated2012 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
36 internal medicine physician records list a practice address in Saint Charles
They are 36 of the 1,547 NPPES records with a practice address in Saint Charles, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Saint Charles → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Haseena Mazhar Ali, MDSaint Charles, MO 633031851738769
- Amalakumar Augustine, MDSaint Charles, MO 633031871579896
- Bev Fingerhood, M.D.Saint Charles, MO 633031952403487
- Yousaf Jalil, M.D.Saint Charles, MO 633031629384136
- Daniel Kramer, M.D.Saint Charles, MO 633031275594046
- Eileen Lamb, M.D.Saint Peters, MO 633031710948468
- Richard Murray, M.D.Saint Charles, MO 633031851352637
- Abid Nisar, MDSaint Peters, MO 633031245375567
Common questions
What is Tejaswini R. Nayak, M.D.'s NPI number?
Tejaswini R. Nayak, M.D.'s National Provider Identifier (NPI) is 1609841303, issued on Feb 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Tejaswini R. Nayak, M.D. located?
The NPPES record lists a practice address at 1820 Zumbehl RD, Saint Charles, MO, 63303. Phone: (636) 928-1237. Providers update this record themselves, so call before visiting.
How can I verify Tejaswini R. Nayak, M.D.'s license?
NPPES lists Missouri license number 2002015974, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Tejaswini R. Nayak, M.D. prescribe under Medicare Part D?
In 2024, Tejaswini R. Nayak, M.D. had 7,777 Medicare Part D claims for 431 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.