Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Sumathy Nagraj Iyengar, MD

Individual provider Internal Medicine Physician · NPI 1013173723

Sumathy Nagraj Iyengar, MD is a Hospitalist in Mason City, Iowa. Qualified in 1988, 38 years ago. Practices with Cogent Healthcare of Iowa PC, a 59-clinician group and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
38
Licensed in
IA
In the registry since
2008
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1000 4th St SW Mercy Medical Center-Hospitalist Dept
Mason City, IA 50401-2800
Phone: (641) 428-7000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 39427 (IA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 39427 (IA)

Record details

NPI number1013173723
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 1, 2008
Last updated in NPPESAugust 3, 2020
Certification dateAugust 3, 2020

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1988 (38 years in practice)
Group practice Cogent Healthcare Of Iowa Pc — 59 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Mason City