Quick answers
- Does Shahid Mahmood accept Medicare assignment?
- Yes. Medicare's clinician data says Shahid Mahmood 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 Shahid Mahmood see?
- In 2024, CMS data shows 582 Original Medicare patients and 1,427 services for Shahid Mahmood. This counts Original Medicare only and measures volume, not quality.
- What is Shahid Mahmood's NPI number?
- 1154340842. 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 Shahid Mahmood, 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 | 582 |
|---|---|
| Services billed to Medicare | 1,427 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Cell examination of specimen, selective cellular enhancement technique (88112)393 services
- Special stained specimen slides to examine tissue, each multiplex procedure (88344)329 services
- Special stained specimen slides to examine tissue including interpretation and report (88313)246 services
- Cell examination of urine, manual (88120)140 services
- Surgical pathology, gross and microscopic examinations, for prostate needle biopsy, any method (G0416)121 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 blood pressure75%
- High cholesterol75%
- Arthritis47%
- Ischemic heart disease42%
- Diabetes36%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)36%
Practice locations
Addresses where Shahid Mahmood is enrolled with Medicare (CMS data updated October 2, 2026).
- 365 E Main StPatchogue, NY 11772 (631) 751‑3000
- 48 Route 25aSmithtown, NY 11787 (631) 751‑3000
Group practices
Medicare enrollment lists Shahid Mahmood as a member of this group (CMS data updated October 2, 2026).
- North Shore Hematology Oncology Associates PC479 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Other clinicians in North Shore Hematology Oncology Associates PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1154340842 |
| 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