Quick answers
- Does Harsha U. Jayawardena accept Medicare assignment?
- Yes. Medicare's clinician data says Harsha U. Jayawardena accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Harsha U. Jayawardena see?
- In 2024, CMS data shows 402 Original Medicare patients and 914 services for Harsha U. Jayawardena. This counts Original Medicare only and measures volume, not quality.
- What is Harsha U. Jayawardena's NPI number?
- 1871587352. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Harsha U. Jayawardena, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 402 |
|---|---|
| Services billed to Medicare | 914 |
| Different services or procedures | 92 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)117 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)105 services
- Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)96 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)64 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)52 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure73%
- High cholesterol71%
- Arthritis39%
- Diabetes25%
- Ischemic heart disease22%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)21%
Hospitals where Harsha U. Jayawardena works
Medicare's Facility Affiliation Data lists Harsha U. Jayawardena at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Franklin General HospitalHampton, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161308
- Mercy Medical Center-New HamptonNew Hampton, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161331
- MercyOne North Iowa Medical CenterMason City, IA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 160064
Practice locations
Addresses where Harsha U. Jayawardena is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 1000 4th St SWMason City, IA 50401
- 1720 Central Ave E, Franklin General HospitalHampton, IA 50441 (641) 456‑5000
- 250 S Crescent DrMason City, IA 50401
- 308 N Maple AveNew Hampton, IA 50659
- 308 N Maple Ave, Mercyone New Hampton Medical CenterNew Hampton, IA 50659 (641) 394‑4121
Group practices
Medicare enrollment lists Harsha U. Jayawardena as a member of these groups (CMS data updated October 2, 2026).
- North Iowa Mercy Clinics302 clinicians in the group
- Mercy Medical Center New Hampton20 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Mason City
Clinicians with the same Medicare primary specialty in Mason City, IA — not a recommendation.
Other clinicians in North Iowa Mercy Clinics
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871587352 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians