Karthik Iyer, MD - Medicare Internal Medicine in Festus, MO

Karthik Iyer, MD is a medicare enrolled "Internal Medicine - Critical Care Medicine" physician in Festus, Missouri. He graduated from medical school in 2004 and has 20 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Mercy Clinic Adult Critical Care, Llc and his current practice location is 1400 Us Highway 61, Festus, Missouri. You can reach out to his office (for appointments etc.) via phone at (636) 933-5337.

Karthik Iyer is licensed to practice in Missouri (license number 2012041517) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1013203454.

Contact Information

Karthik Iyer, MD
1400 Us Highway 61,
Festus, MO 63028-4100
(636) 933-5337
Not Available

Map and Direction




Physician's Profile

Full NameKarthik Iyer
GenderMale
SpecialityInternal Medicine
Experience20 Years
Location1400 Us Highway 61, Festus, Missouri
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Karthik Iyer graduated from medical school in 2004
  NPI Data:
  • NPI Number: 1013203454
  • Provider Enumeration Date: 06/23/2011
  • Last Update Date: 07/26/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 3678798808
  • Enrollment ID: I20140702001036

Medical Identifiers

Medical identifiers for Karthik Iyer such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1013203454NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RC0200XInternal Medicine - Critical Care Medicine 2012041517 (Missouri)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Mercy Hospital JeffersonFestus, MOHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Mercy Clinic Adult Critical Care, Llc377951204146

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Karthik Iyer allows following entities to bill medicare on his behalf.
Entity NameMercy Clinic Adult Critical Care, Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1730119421
PECOS PAC ID: 3779512041
Enrollment ID: O20050808000024
Entity NameMercy Clinic Adult Hospitalists Jefferson Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1083052492
PECOS PAC ID: 8628205598
Enrollment ID: O20131220001798

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Karthik Iyer is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Karthik Iyer, MD
1400 Us Highway 61 # H1521,
Festus, MO 63028-4100

Ph: (636) 933-5337
Karthik Iyer, MD
1400 Us Highway 61,
Festus, MO 63028-4100

Ph: (636) 933-5337

Reviews and Comments


Internal Medicine Doctors in Festus, MO

Holly Ackermann, FNP
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1153 E Gannon Dr, Festus, MO 63028
Phone: 636-282-0380    Fax: 636-282-0384
Joanne M Waltman, MD
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1500 Calvary Church Rd, Festus, MO 63028
Phone: 636-933-2900    Fax: 636-933-8017
Dr. Manzoor Ahmad Tariq, MD
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1071 Airport Road, Festus, MO 63028
Phone: 636-931-7111    Fax: 636-937-7486
Amit J Shah, M.D.
Critical Care Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1500 Calvary Church Rd, Festus, MO 63028
Phone: 636-933-2900    
Amanda E Avellone, MD
Critical Care Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1455 Us Highway 61, Festus, MO 63028
Phone: 636-937-3121    Fax: 636-937-4423
Jooho Peter Kim, MD
Critical Care Medicine
Medicare: Medicare Enrolled
Practice Location: 1400 Us Highway 61 # H1521, Festus, MO 63028
Phone: 636-933-5337    Fax: 636-933-8090

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.