Quick answers
- Does Erin N. Christiano accept Medicare assignment?
- Yes. Medicare's clinician data says Erin N. Christiano 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 Erin N. Christiano see?
- In 2024, CMS data shows 33 Original Medicare patients and 71 services for Erin N. Christiano. This counts Original Medicare only and measures volume, not quality.
- What is Erin N. Christiano's NPI number?
- 1649987611. 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 Erin N. Christiano, 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 | 33 |
|---|---|
| Services billed to Medicare | 71 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 68 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)22 services
- Urinalysis, manual test (81002)17 services
- Assessment of emotional or behavioral problems (96127)11 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%
- Arthritis42%
- High blood pressure39%
Practice locations
Addresses where Erin N. Christiano is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Nicolls RdStony Brook, NY 11794 (631) 444‑7650
Group practices
Medicare enrollment lists Erin N. Christiano as a member of this group (CMS data updated October 2, 2026).
- University Associates in Obstetrics and Gynecology University Faculty112 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Stony Brook
Clinicians with the same Medicare primary specialty in Stony Brook, NY — not a recommendation.
Other clinicians in University Associates in Obstetrics and Gynecology University Faculty
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649987611 |
| 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