Sumathy Nagraj Iyengar, M.D.,
Hospitalist Physician · Mason City, IA
Sumathy Nagraj Iyengar, M.D., is a hospitalist physician with a practice address in Mason City, Iowa, and NPI 1013173723, issued on Aug 1, 2008. Check the license (Iowa 39427, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Sumathy Nagraj Iyengar
- Credential
- M.D.,
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 39427 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 4TH St SW, Mason City, IA 50401
- Phone
- (641) 428-7000
- Enumerated
- Aug 1, 2008
- Record last updated
- Aug 3, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110817000030); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 302 in Iowa → Look up another NPI →
Also registered at 1000 4TH St SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sheela Ahari, MDAnesthesiology Physician1518910462
- Tauseef Akhtar, MDCardiovascular Disease Physician1508218009
- Emad Alamouti-Fard, MDFamily Medicine Physician1811821499
Verify Sumathy Nagraj Iyengar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 39427Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average hospitalist physician in 2024
370 Medicare Part D claims for 174 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 46 claims were for opioids.
Most prescribed
- Cephalexin20 claims
- Hydrocodone-Acetaminophen15 claims
- Prednisone14 claims
- Tramadol Hcl13 claims
- Amoxicillin-Clavulanate Potass12 claims
- Furosemide12 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.
Bills Medicare through one group practice
- Cogent Healthcare OF Iowa PCMason City, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sumathy Nagraj Iyengar among 302 hospitalist physician records in Iowa
Sumathy Nagraj Iyengar, M.D., is one of 302 hospitalist physician records with a practice address in Iowa. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 21% of them.
- NPI issued2008 · 21% of these records are older, 76% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated1988 · median 2014 among the 243 with a school on file
- Record last updated2020 · 26% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Iowa
There are 302 hospitalist physician records in Iowa.
All 302 in Iowa → Every provider in Mason City → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Mohamed Abd El MaksoudMason City, IA 504011033792825
- Luna Acharya, MDMason City, IA 504011609224674
- Thomas Delaney, MDMason City, IA 504011033226469
- Rupesh Kshetri, MDMason City, IA 504011871926444
- Jonas Kwiatkowski, MDMason City, IA 504011346796646
- Maureen Muke, MDMason City, IA 504011497019483
- Mahad Rayale, MDMason City, IA 504011053807578
- Dustin Uhlenhopp, DODes Moines, IA 503171871085019
Common questions
What is Sumathy Nagraj Iyengar, M.D.,'s NPI number?
Sumathy Nagraj Iyengar, M.D.,'s National Provider Identifier (NPI) is 1013173723, issued on Aug 1, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Sumathy Nagraj Iyengar, M.D., located?
The NPPES record lists a practice address at 1000 4TH St SW, Mason City, IA, 50401. Phone: (641) 428-7000. Providers update this record themselves, so call before visiting.
How can I verify Sumathy Nagraj Iyengar, M.D.,'s license?
NPPES lists Iowa license number 39427, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sumathy Nagraj Iyengar, M.D., prescribe under Medicare Part D?
In 2024, Sumathy Nagraj Iyengar, M.D., had 370 Medicare Part D claims for 174 beneficiaries; the average among hospitalist physician prescribers was 521. 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.