KARTHIK IYER (MD) – Critical Care Medicine (Internal Medicine) Physician, NPI 1013203454
Critical Care Medicine (Internal Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,186 INTERNAL MEDICINE in MO
Provider Addresses for KARTHIK IYER (MD)
1100 S GRAND BLVD
DRC 831
SAINT LOUIS, MO 631041015
Phone:
Type: Mailing
1400 US HIGHWAY 61 # H1521
FESTUS, MO 630284100
Phone: (636) 933-5337
Type: Mailing
1400 US HIGHWAY 61
FESTUS, MO 630284100
Phone: (636) 933-5337
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 5 Open Payments records for all available years, with a total value of $97.
Total Amount is formed as General ($97) + Research ($0) + Ownership ($0) = $97.
Last reported payment date: 2024-08-22 • Largest payer in this snapshot: E.R. Squibb & Sons, L.L.C. ($30).
Total Amount
$97
General + Research + Ownership
Payments
5
Total payment records
General Amount
$97
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-08-22
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| E.R. Squibb & Sons, L.L.C. | $30 |
| Amgen Inc. | $30 |
| ABIOMED | $22 |
| PFIZER INC. | $14 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2014-07-02
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Past revalidation due date
Earliest CMS due date was 2023-07-31 (1041 days ago).
Enrollment records
1
Earliest due date
2023-07-31
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20140702001036 | I | Internal Medicine | MO | 2023-07-31 |
What to do next
- Verify current status on the CMS Revalidation Lookup Tool immediately.
- Complete revalidation in PECOS or contact your Medicare Administrative Contractor (MAC).
- Overdue revalidation can lead to deactivation of Medicare billing privileges.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99291 | Critical care, first 30-74 minutes | 82 | 42 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 17 | 14 | $0 |
Insurance plans in this area (ZIP 63104)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | MO | 31500 | Emergent insertion of breathing tube into windpipe cartilage using an endoscope | 16 | 16 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Critical Care (Intensivists), Internal Medicine | MO | |
| Internal Medicine | MO | |
| Internal Medicine | NY | |
| Critical Care (Intensivists) | MO | |
| Physician Assistant | MO | |
| Physician Assistant | MO | |
| Physician Assistant | MO | |
| Physician Assistant | MO | |
| Critical Care (Intensivists), Pulmonary Disease | MO | |
| Critical Care (Intensivists), Pulmonary Disease | KY |
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