Quick answers
- Does Karen Mahoney Malcomson accept Medicare assignment?
- Medicare's clinician data says Karen Mahoney Malcomson may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Karen Mahoney Malcomson's NPI number?
- 1477734549. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Karen Mahoney Malcomson works
Medicare's Facility Affiliation Data lists Karen Mahoney Malcomson at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Long Island Jewish Medical CenterNew Hyde Park, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330195
Practice locations
Addresses where Karen Mahoney Malcomson is enrolled with Medicare (CMS data updated October 2, 2026).
- 1111 Marcus AveNew Hyde Park, NY 11042
- 267 E Main St, Suite B23Smithtown, NY 11787 (631) 252‑2376
- 75 -59Glen Oaks, NY 11004 (718) 470‑8100
Group practices
Medicare enrollment lists Karen Mahoney Malcomson as a member of this group (CMS data updated October 2, 2026).
- North Shore-Lij Medical PC6,440 clinicians in the group
Specialties
- Clinical Social Workerprimary
Other clinical social workers in New Hyde Park
Clinicians with the same Medicare primary specialty in New Hyde Park, NY — not a recommendation.
Other clinicians in North Shore-Lij Medical PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2005 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1477734549 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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