Quick answers
- Does Christina Stillwell accept Medicare assignment?
- Yes. Medicare's clinician data says Christina Stillwell 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 Christina Stillwell see?
- In 2024, CMS data shows 305 Original Medicare patients and 573 services for Christina Stillwell. This counts Original Medicare only and measures volume, not quality.
- What is Christina Stillwell's NPI number?
- 1609802669. 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 Christina Stillwell, 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 | 305 |
|---|---|
| Services billed to Medicare | 573 |
| Different services or procedures | 32 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)141 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)92 services
- Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) (87811)69 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)52 services
- Automated urinalysis test (81003)43 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 pressure70%
- Arthritis48%
- Diabetes32%
- Anxiety32%
- Ischemic heart disease30%
Practice locations
Addresses where Christina Stillwell is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 12; the Medicare profile lists all.
- 103 Jackson Ave, BSyosset, NY 11791 (516) 537‑9062
- 1842 Old Country RdRiverhead, NY 11901 (631) 830‑4175
- 19 W Jericho TpkeHuntington Station, NY 11746 (631) 604‑4022
- 1950 Jericho TpkeEast Northport, NY 11731 (631) 238‑3065
- 2079 Smith Haven PlzLake Grove, NY 11755 (631) 315‑6758
Group practices
Medicare enrollment lists Christina Stillwell as a member of this group (CMS data updated October 2, 2026).
- North Shore Lij Urgent Care PC390 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Syosset
Clinicians with the same Medicare primary specialty in Syosset, NY — not a recommendation.
Other clinicians in North Shore Lij Urgent Care PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1609802669 |
| 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