HealthcareDiscovery.AI / Doctors / Iowa / Mason City

Doctors in Mason City, Iowa

Data updated monthly · Last refresh September 2026

290 licensed providers practice in Mason City across 51 specialties, and 33% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

290providers

51specialties

33%with industry payments

Specialties in Mason City

Family Medicine in Mason City (56) · 20% received drug or device payments
Internal Medicine in Mason City (39) · 36% received drug or device payments
Diagnostic Radiology in Mason City (16)
Registered Dietitian in Mason City (14)
Chiropractor in Mason City (13)
Emergency Medicine in Mason City (12)
Orthopaedic Surgery in Mason City (10)
Anesthesiology in Mason City (9)
Pediatrics in Mason City (8)
Ophthalmology in Mason City (8)
Hospitalist in Mason City (8)
Cardiovascular Disease in Mason City (7)
Obstetrics & Gynecology in Mason City (7)
Surgery in Mason City (6)
Urology in Mason City (6)
Interventional Cardiology in Mason City (5)
Otolaryngology in Mason City (5)
Psychiatry in Mason City (5)
Pulmonary Disease in Mason City (4)
Dermatology in Mason City (4)
Medical Oncology in Mason City (4)
Pediatric Adolescent Medicine in Mason City (4)
Neurological Surgery in Mason City (3)
Anatomic Pathology & Clinical Pathology in Mason City (3)
Neurology in Mason City (2)
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Mason City (2)
Allergy & Immunology in Mason City (2)
Hospice and Palliative Medicine (Family Medicine) in Mason City (2)
Radiation Oncology in Mason City (2)
Clinical Cardiac Electrophysiology in Mason City (2)
Vascular Surgery in Mason City (2)
Interventional Pain Medicine in Mason City (1)
Surgical Critical Care in Mason City (1)
Plastic Surgery in Mason City (1)
Sleep Medicine (Otolaryngology) in Mason City (1)
Renal Nutrition Registered Dietitian in Mason City (1)
Hematology & Oncology in Mason City (1)
Physical Medicine & Rehabilitation in Mason City (1)
Clinical Neurophysiology in Mason City (1)
Emergency Medical Services (Emergency Medicine) in Mason City (1)
Critical Care Medicine (Internal Medicine) in Mason City (1)
Plastic Surgery within the Head & Neck (Otolaryngology) in Mason City (1)
Plastic and Reconstructive Surgery in Mason City (1)
Gastroenterology in Mason City (1)
Infectious Disease in Mason City (1)
Child & Adolescent Psychiatry in Mason City (1)
Nephrology in Mason City (1)
Vascular & Interventional Radiology in Mason City (1)
Internist Chiropractor in Mason City (1)
Endocrinology, Diabetes & Metabolism in Mason City (1)
Sports Medicine (Family Medicine) in Mason City (1)

Common questions

How many doctors practice in Mason City, Iowa?

290 licensed providers with active NPI records list a practice address in Mason City, according to federal NPPES data refreshed monthly.

How many doctors in Mason City received drug or device company payments?

97 of 290 providers in Mason City (33%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

Other cities in Iowa

All Iowa specialties Ask Zach for help choosing

Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.