Sumathy Iyengar, M.D.,
NPI 1013173723 · Hospitalist Physician · Mason City, IA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sumathy Iyengar, M.D., is a Hospitalist Physician provider in Mason City, IA (NPI 1013173723).
Provider details
- NPI number
- 1013173723
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.,
- Sex
- Female
- Sole proprietor
- No
- License
- 39427 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,419 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 610 | $109 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 374 | $72 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 223 | $105 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 169 | $159 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 25 | $119 |
| Advance Care Planning, First 30 Minutes99497 | 18 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 20 | 19 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 15 | 15 |
| Prednisone | 14 | 14 |
| Tramadol Hcl | 13 | 12 |
| Furosemide | 12 | — |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 12 | 12 |
| Cefdinir | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-08-01
- Last updated
- 2020-08-03
- Certified
- 2020-08-03
Frequently asked questions
- What is Sumathy Iyengar's NPI number?
- Sumathy Iyengar's National Provider Identifier (NPI) is 1013173723, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sumathy Iyengar's specialty?
- Sumathy Iyengar is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Sumathy Iyengar located?
- Sumathy Iyengar's practice location on file with NPPES is 1000 4th St Sw, Mason City, IA 50401-2800.
- What is Sumathy Iyengar's phone number?
- The practice phone number listed in the NPPES registry for Sumathy Iyengar is (641) 428-7000.
- Does Sumathy Iyengar accept Medicare?
- Sumathy Iyengar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sumathy Iyengar's NPI active?
- Yes — Sumathy Iyengar's NPI (1013173723) is active in the NPPES registry as of the last update on 2020-08-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.