SUMATHY NAGRAJ IYENGAR (M.D.,) – Hospitalist Physician, NPI 1013173723
Hospitalist Physician
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Profile Insights
NPPES metrics only — not quality of care.
414 HOSPITALIST in IA
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Provider Addresses for SUMATHY NAGRAJ IYENGAR (M.D.,)
MercyOne North Iowa Medical Center, 1000, 4th Street Southwest, Mason City, Cerro Gordo County, Iowa, 50401, United States
MERCY MEDICAL CENTER-HOSPITALIST DEPT
MASON CITY, IA 504012800
Phone: (641) 428-7000
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $70.
Total Amount is formed as General ($70) + Research ($0) + Ownership ($0) = $70.
Last reported payment date: 2023-06-26 • Largest payer in this snapshot: Abbott Laboratories ($70).
Total Amount
$70
General + Research + Ownership
Payments
1
Total payment records
General Amount
$70
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-06-26
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Abbott Laboratories | $70 |
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: 2011-08-17
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
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 |
|---|---|---|---|---|
| I20110817000030 | I | Hospitalist | IA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
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 |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 616 | 280 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 500 | 201 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 270 | 258 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 183 | 176 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 28 | 28 | $0 |
Insurance plans in this area (ZIP 50401)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | IA | |
| Internal Medicine | PA | |
| Internal Medicine | IN | |
| Internal Medicine, Nephrology | IA | |
| Internal Medicine | IA | |
| Physician Assistant | IA | |
| Internal Medicine, Hospitalist | IA | |
| Internal Medicine, Hospitalist | IA | |
| H O S P I T A L I S T | OH | |
| Internal Medicine | IL |
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