Quick answers
- Does Cristiana G. Pieroni accept Medicare assignment?
- Yes. Medicare's clinician data says Cristiana G. Pieroni 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 Cristiana G. Pieroni see?
- In 2024, CMS data shows 458 Original Medicare patients and 5,550 services for Cristiana G. Pieroni. This counts Original Medicare only and measures volume, not quality.
- What is Cristiana G. Pieroni's NPI number?
- 1861525313. 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 Cristiana G. Pieroni, 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 | 458 |
|---|---|
| Services billed to Medicare | 5,550 |
| Different services or procedures | 34 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Imaging of retina (92134)972 services
- Established patient problem focused exam of visual system (92012)587 services
- Extended exam of the back part of the eye with retinal drawing (92201)532 services
- Injection, aflibercept, 1 mg (J0178)498 services
- Injection of drug into eye (67028)388 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 pressure63%
- Arthritis42%
- Diabetes32%
- Ischemic heart disease28%
- Osteoporosis20%
Practice locations
Addresses where Cristiana G. Pieroni is enrolled with Medicare (CMS data updated October 2, 2026).
- 20 W 13th StNew York, NY 10011 (212) 604‑9800
Group practices
Medicare enrollment lists Cristiana G. Pieroni as a member of this group (CMS data updated October 2, 2026).
- Associated Retina Specialist PLLC2 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Other clinicians in Associated Retina Specialist PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| 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) | 1861525313 |
| 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