Quick answers
- Does Karen J. O Sullivan Seifert accept Medicare assignment?
- Yes. Medicare's clinician data says Karen J. O Sullivan Seifert 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 Karen J. O Sullivan Seifert see?
- In 2024, CMS data shows 42 Original Medicare patients and 803 services for Karen J. O Sullivan Seifert. This counts Original Medicare only and measures volume, not quality.
- What is Karen J. O Sullivan Seifert's NPI number?
- 1679629497. 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 Karen J. O Sullivan Seifert, 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 | 42 |
|---|---|
| Services billed to Medicare | 803 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 51 |
Most frequent services
- Treatment of speech, language, voice, communication, and/or hearing processing disorder (92507)707 services
- Evaluation of speech sound production with evaluation of language comprehension and expression (92523)22 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 cholesterol57%
- High blood pressure48%
- Depression43%
- Stroke or mini-stroke38%
- Anxiety26%
Practice locations
Addresses where Karen J. O Sullivan Seifert is enrolled with Medicare (CMS data updated October 2, 2026).
- 12 Platinum CtMedford, NY 11763 (631) 868‑3577
- 235 Blue Point AveBlue Point, NY 11715 (631) 363‑5794
Group practices
Medicare enrollment lists Karen J. O Sullivan Seifert as a member of this group (CMS data updated October 2, 2026).
- Little Angels Center Inc2 clinicians in the group
Specialties
Find other clinicians: Qualified Speech Language Pathologist, New York →
Other speech-language pathologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Other clinicians in Little Angels Center Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 1997 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1679629497 |
| 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