Karthik Iyer, MD
Critical Care Medicine (Internal Medicine) Physician · Festus, MO
Karthik Iyer, MD is a critical care medicine (internal medicine) physician with a practice address in Festus, Missouri, and NPI 1013203454, issued on Jun 23, 2011. Check the license (Missouri 2012041517, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Karthik Iyer
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- 2012041517 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1400 US Highway 61, Festus, MO 63028
- Phone
- (636) 933-5337
- Enumerated
- Jun 23, 2011
- Record last updated
- Jul 26, 2023
- Medicare enrollment
- Enrolled (PECOS I20140702001036); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 178 in Missouri → Look up another NPI →
Also registered at 1400 US Highway 61
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Adderley, D.O.Physical Medicine & Rehabilitation Physician1114149903
- Benjamin Albano, M.D.Internal Medicine Physician1982603650
- Ahmad Alhomaid, MBBSInternal Medicine Physician1902548944
- Birju Amin, DOFamily Medicine Physician1821658402
- Erik Aubuchon, D.O.Internal Medicine Physician1558596668
- Muhammad Azharuddin, MDGeriatric Medicine (Internal Medicine) Physician1851490460
Verify Karthik Iyer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2012041517Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $82.86
4 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 2,708 providers of this specialty with any payment received $2,958.68 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mercy Clinic Adult Critical Care, LLCFestus, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karthik Iyer among 178 critical care medicine (internal medicine) physician records in Missouri
Karthik Iyer, MD is one of 178 critical care medicine (internal medicine) physician records with a practice address in Missouri. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 58% of them.
- NPI issued2011 · 58% of these records are older, 38% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2004 · median 2005 among the 144 with a school on file
- Record last updated2023 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Missouri
There are 178 critical care medicine (internal medicine) physician records in Missouri.
All 178 in Missouri → Every provider in Festus → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Warren Breite, MDFestus, MO 630281457355372
- Muneeb Ahmad, D.O.Chesterfield, MO 630171639432032
- Hope Cranston-D'Amato, MD, FACPChesterfield, MO 630171821033069
- John Frattini, MDChesterfield, MO 630171124093810
- Moataz Gaddor, MDChesterfield, MO 630171255694600
- Adnan Habib, MDChesterfield, MO 630171730298381
- Rucha Karajgikar, M.D.Chesterfield, MO 630171609164524
- Temitope Shodunke, MDChesterfield, MO 630171144517707
Common questions
What is Karthik Iyer, MD's NPI number?
Karthik Iyer, MD's National Provider Identifier (NPI) is 1013203454, issued on Jun 23, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Karthik Iyer, MD located?
The NPPES record lists a practice address at 1400 US Highway 61, Festus, MO, 63028. Phone: (636) 933-5337. Providers update this record themselves, so call before visiting.
How can I verify Karthik Iyer, MD's license?
NPPES lists Missouri license number 2012041517, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.