Quick answers
- Does Nilanthi D. Gunawardane accept Medicare assignment?
- Yes. Medicare's clinician data says Nilanthi D. Gunawardane 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 Nilanthi D. Gunawardane see?
- In 2024, CMS data shows 220 Original Medicare patients and 770 services for Nilanthi D. Gunawardane. This counts Original Medicare only and measures volume, not quality.
- What is Nilanthi D. Gunawardane's NPI number?
- 1124351051. 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 Nilanthi D. Gunawardane, 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 | 220 |
|---|---|
| Services billed to Medicare | 770 |
| Different services or procedures | 31 |
| 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)133 services
- Destruction of precancer skin growth, 2-14 growths (17003)106 services
- Destruction of precancer skin growth, 1 growth (17000)100 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)83 services
- Biopsy of related skin growth, first growth (11102)63 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 cholesterol70%
- High blood pressure63%
- Arthritis43%
- Diabetes25%
- Osteoporosis21%
- Anxiety20%
Practice locations
Addresses where Nilanthi D. Gunawardane is enrolled with Medicare (CMS data updated October 2, 2026).
- 1950 Sunny Crest Dr, Suite 2900Fullerton, CA 92835 (714) 992‑5350
- 2501 E Chapman AveOrange, CA 92869 (714) 633‑7175
- 4300 Rose DrYorba Linda, CA 92886 (714) 577‑6601
Group practices
Medicare enrollment lists Nilanthi D. Gunawardane as a member of this group (CMS data updated October 2, 2026).
- Providence Medical Foundation1,466 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Fullerton
Clinicians with the same Medicare primary specialty in Fullerton, CA — not a recommendation.
Other clinicians in Providence Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 2009 (17 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124351051 |
| 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
- 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