Quick answers
- Does Melissa Derenzo accept Medicare assignment?
- Yes. Medicare's clinician data says Melissa Derenzo 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 Melissa Derenzo see?
- In 2024, CMS data shows 204 Original Medicare patients and 629 services for Melissa Derenzo. This counts Original Medicare only and measures volume, not quality.
- What is Melissa Derenzo's NPI number?
- 1346327947. 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 Melissa Derenzo, 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 | 204 |
|---|---|
| Services billed to Medicare | 629 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)132 services
- Established patient complete exam of visual system (92014)70 services
- Removal of cataract with insertion of prosthetic lens (66984)41 services
- Imaging of retina (92134)33 services
- Imaging of optic nerve (92133)27 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 cholesterol75%
- High blood pressure74%
- Arthritis50%
- Diabetes33%
- Chronic kidney disease25%
- Ischemic heart disease23%
Practice locations
Addresses where Melissa Derenzo is enrolled with Medicare (CMS data updated October 2, 2026).
- 111 Hazel Ln, Suite 102Sewickley, PA 15143 (412) 741‑5577
- 1200 Sharon Rd, Suite 202Beaver, PA 15009 (412) 741‑5577
Group practices
Medicare enrollment lists Melissa Derenzo as a member of this group (CMS data updated October 2, 2026).
- Daniel J Nadler MD PC3 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Sewickley
Clinicians with the same Medicare primary specialty in Sewickley, PA — not a recommendation.
Other clinicians in Daniel J Nadler MD PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Pennsylvania State University College Of Medicine |
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346327947 |
| 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