Physician Profile
Sumathy N. Iyengar, M.D.
Unclaimed ProfileAbout Dr. Iyengar
Sumathy N. Iyengar, M.D. is a hospitalist practicing in Mason City, IA. Sumathy is also listed as specializing in internal medicine. Medicare claims data shows Sumathy provided 1,419 services to 839 patients. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and hospital discharge day management, more than 30 minutes.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (641) 428-7000
- Email not available
Practice Locations
1000 4TH ST SW MERCY MEDICAL CENTER-HOSPITALIST DEPT
Mason City, IA 50401
Conditions Commonly Evaluated or Treated
Within Hospital Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Allergic Reactions
- Severe Allergic Reaction
Blood Clots
- Blood Clot in Lung
Blood Disorders
- Sickle Cell Pain Crisis
Brain & nerves
- Alcohol withdrawal
- Delirium
- Fainting and syncope
- Meningitis
- Transient ischemic attack
Brain & Nerves
- Status epilepticus
Breathing & lungs
- Community-acquired pneumonia
- COPD flare-up
- Fluid around the lungs
- Severe asthma attack
Digestive health
- Acute gallbladder inflammation
- Acute pancreatitis
- Ascites
- Bowel obstruction
- C. diff diarrhea
- Severe diverticulitis flare-up
- Stomach or intestinal bleeding
Emergencies
- Drug overdose or poisoning
Endocrine
- Dangerously High Calcium
General medical
- Hip fracture medical care
- Low sodium or electrolyte imbalance
- Post-surgery fever or infection
- Severe dehydration
- Short stature and growth concerns
Heart & Circulation
- A-Fib Flare-Up
- Heart Attack Inpatient Care
- Shock
Heart & circulation
- Dangerous high blood pressure
- Deep vein thrombosis
- Heart failure flare-up
- Severe anemia
- Supraventricular tachycardia
- Unexplained chest pain
Hormones & diabetes
- Dangerous high blood sugar
Infections
- Bone infection
- Cellulitis
- Complicated Bladder Infection
- Flesh-Eating Infection
- Infective endocarditis
- Sepsis or blood infection
- Severe COVID-19 illness
- Severe flu illness
Kidney & urinary
- Acute kidney injury
- Kidney infection
Liver & Digestive
- Hepatic encephalopathy
- Severe Fecal Impaction
- Sudden Liver Failure
Lung Infections
- Hospital-Acquired Pneumonia
- Severe Pneumonia
Lungs & Breathing
- Respiratory failure
Nutrition
- Severe Malnutrition In Hospital
Procedures & services
Access & tubes
- Arterial catheter placement
- Central line placement
- Feeding or stomach tube insertion
- PICC line placement coordination
- Urinary catheter insertion
Addiction Medicine
- Inpatient Opioid Withdrawal Induction
Airway & Breathing
- Emergency intubation
- Tracheostomy care
Breathing support
- BiPAP or CPAP therapy
- Breathing machine management
- Oxygen therapy
Critical Care
- Continuous IV Sedation Management
- CPR and defibrillation
- Rapid Response Team Call
Diagnostic procedures
- Emergency ultrasound
- Hospital heart rhythm monitoring
- Lumbar puncture
- Swallowing safety evaluation coordination
Diagnostic Testing
- Blood Culture Workup
Draining fluids
- Draining lung fluid
- Paracentesis
Emergency Care
- Blood Thinner Reversal
Heart Procedures
- Bedside Heart Ultrasound
- Electrical cardioversion
Hospital services
- Alcohol detox monitoring
- Comfort care transition
- Fall risk assessment
- Hospital admission
- Hospital discharge planning
- Hospital observation care
- Hospital wound and bed sore care
- Inpatient dialysis coordination
- Inpatient physical therapy evaluation
- Medication management
- Post-surgery hospital recovery care
- Pre-surgery medical clearance
- Rehab or nursing home placement evaluation
- Specialist consultation coordination
Joint Procedures
- Joint injection or aspiration
Kidney Care
- Inpatient Peritoneal Dialysis Care
Lung Procedures
- Chest tube insertion
Medication & fluids
- Blood sugar insulin drip
- Blood thinner drip management
- Blood transfusion
- IV antibiotic treatment
- IV electrolyte replacement
- IV fluids
- Patient-Controlled Analgesia (PCA) Setup
Mental Health
- Medical-Psychiatric Inpatient Evaluation
Neurological Care
- Continuous Neurological Checks
- Emergency Stroke Response
Nutrition Support
- IV Nutrition For Preemies
Rehabilitation
- Inpatient Occupational Therapy Evaluation
Urinary Care
- Continuous Bladder Irrigation
Procedures Most Often Billed to Medicare
1,419 services · 839 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
610 | More than most peers in HOSPITALIST |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
374 | More often than most peers in HOSPITALIST |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
223 | More than most peers in HOSPITALIST |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
169 | More often than most peers in HOSPITALIST |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
25 | As often as other peers in HOSPITALIST |
| Advance care planning, first 30 minutes | Office visit | 99497 |
18 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 1988 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Sumathy N. Iyengar specialize in?
Sumathy N. Iyengar is a hospitalist in Mason City, IA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Sumathy N. Iyengar located?
Sumathy N. Iyengar is listed at 1000 4Th St Sw Mercy Medical Center-Hospitalist Dept, Mason City, IA 50401. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Sumathy N. Iyengar's phone number?
The number on file is (641) 428-7000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Sumathy N. Iyengar?
Sumathy N. Iyengar's National Provider Identifier is 1013173723. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Sumathy N. Iyengar train?
Sumathy N. Iyengar attended Other, graduating in 1988. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Sumathy N. Iyengar have?
Sumathy N. Iyengar has 38 years experience. Calculated from a graduation year of 1988, reported in the CMS National Downloadable File.
CMS public data
What does Sumathy N. Iyengar do most often?
According to Medicare billing data, Sumathy N. Iyengar the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Sumathy N. Iyengar's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Sumathy N. Iyengar. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.