Avinash Kashyap Viswanathan, M.D.
Internal Medicine Physician · Springfield, IL
Avinash Kashyap Viswanathan, M.D. is an internal medicine physician with a practice address in Springfield, Illinois, and NPI 1639487911, issued on Sep 20, 2010. Check the license (Illinois 036.133495, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Avinash Kashyap Viswanathan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 036.133495 IL
336.094733 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3132 Old Jacksonville RD, Springfield, IL 62704
- Phone
- (217) 862-0741
- Enumerated
- Sep 20, 2010
- Record last updated
- May 23, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (217) 862-0858
- Medicare enrollment
- Enrolled (PECOS I20131009000181); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 3132 Old Jacksonville RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicholas Allen, PTPhysical Therapist1790822013
- Rebecca Anderson, PHDClinical Psychologist1073574992
- Brittany Bailey, M.S., CCC-SLPSpeech-Language Pathologist1508041658
- Amy Becker, PTALPhysical Therapy Assistant1427195932
- Lorie Bleyer, M.D.Pediatrics Physician1952308884
- Steven Bowers, M.D.Pediatrics Physician1093713562
Verify Avinash Kashyap Viswanathan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036.133495Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.5 times the Medicare Part D claims of the average internal medicine physician in 2024
14,345 Medicare Part D claims for 890 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 247 claims were for opioids.
Most prescribed
- Atorvastatin Calcium731 claims
- Amlodipine Besylate566 claims
- Levothyroxine Sodium501 claims
- Rosuvastatin Calcium472 claims
- Metoprolol Succinate417 claims
- Lisinopril379 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 72.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Memorial Physician ServicesSpringfield, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Avinash Kashyap Viswanathan among 7,238 internal medicine physician records in Illinois
Avinash Kashyap Viswanathan, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 51% of them.
- NPI issued2010 · 51% of these records are older, 47% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2010 · median 2003 among the 3,580 with a school on file
- Record last updated2014 · 47% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
196 internal medicine physician records list a practice address in Springfield
They are 196 of the 4,997 NPPES records with a practice address in Springfield, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Springfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Craig Backs, M.D.Springfield, IL 627041124043252
- Michael Bova, M.D.Springfield, IL 627041861489510
- Ralph Gauen, M.D.Springfield, IL 627041942219324
- Mark Hansen, M.D.Springfield, IL 627041861488801
- Robert Juranek, MDSpringfield, IL 627041336236264
- Lavanya Kolluri, M.D.Springfield, IL 627041043255144
- James Lafata, M.D.Springfield, IL 627041407866270
- Abdur Nawoor, M.D.Springfield, IL 627041154331684
Common questions
What is Avinash Kashyap Viswanathan, M.D.'s NPI number?
Avinash Kashyap Viswanathan, M.D.'s National Provider Identifier (NPI) is 1639487911, issued on Sep 20, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Avinash Kashyap Viswanathan, M.D. located?
The NPPES record lists a practice address at 3132 Old Jacksonville RD, Springfield, IL, 62704. Phone: (217) 862-0741. Providers update this record themselves, so call before visiting.
How can I verify Avinash Kashyap Viswanathan, M.D.'s license?
NPPES lists Illinois license number 036.133495, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Avinash Kashyap Viswanathan, M.D. prescribe under Medicare Part D?
In 2024, Avinash Kashyap Viswanathan, M.D. had 14,345 Medicare Part D claims for 890 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Avinash Kashyap Viswanathan, M.D.'s MIPS final score?
The 2023 MIPS final score is 72.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.