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

Karthik Iyer, MD

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1013203454

Karthik Iyer, MD is an Internal Medicine in Festus, Missouri. Qualified in 2004, 22 years ago. Practices with Mercy Clinic Adult Critical Care LLC, a 59-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
22
Licensed in
MO
In the registry since
2011
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1400 US Highway 61
Festus, MO 63028-4100
Phone: (636) 933-5337
Show map & directions

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

Specialties & licences

Critical Care Medicine (Internal Medicine) Physician (primary) Taxonomy 207RC0200X · Licence 2012041517 (MO)

Record details

NPI number1013203454
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 23, 2011
Last updated in NPPESJuly 26, 2023
Certification dateJuly 26, 2023
Mailing address1400 Us Highway 61 # H1521, Festus, MO 63028-4100

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesCRITICAL CARE (INTENSIVISTS)
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Group practice Mercy Clinic Adult Critical Care Llc — 59 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount