Quick answers
- Does Alan F. Sloyer accept Medicare assignment?
- Yes. Medicare's clinician data says Alan F. Sloyer 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 Alan F. Sloyer see?
- In 2024, CMS data shows 571 Original Medicare patients and 3,772 services for Alan F. Sloyer. This counts Original Medicare only and measures volume, not quality.
- What is Alan F. Sloyer's NPI number?
- 1073535050. 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 Alan F. Sloyer, 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 | 571 |
|---|---|
| Services billed to Medicare | 3,772 |
| Different services or procedures | 26 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)932 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)260 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)156 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)132 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)119 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 pressure73%
- Arthritis54%
- Ischemic heart disease37%
- Diabetes29%
- Anxiety29%
Hospitals where Alan F. Sloyer works
Medicare's Facility Affiliation Data lists Alan F. Sloyer 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
- North Shore University HospitalManhasset, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330106
- Northwell Hospital Glen CoveGlen Cove, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330181
Practice locations
Addresses where Alan F. Sloyer is enrolled with Medicare (CMS data updated October 2, 2026).
- 187 Veterans BlvdMassapequa, NY 11758 (516) 795‑5523
- 233 E Shore Rd, Suite 101Great Neck, NY 11023 (516) 487‑2444
Group practices
Medicare enrollment lists Alan F. Sloyer as a member of this group (CMS data updated October 2, 2026).
- Gastrointestinal Care of Long Island PLLC183 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Massapequa
Clinicians with the same Medicare primary specialty in Massapequa, NY — not a recommendation.
Other clinicians in Gastrointestinal Care of Long Island PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1073535050 |
| 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
- 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