Quick answers
- Does Jassir Witta accept Medicare assignment?
- Yes. Medicare's clinician data says Jassir Witta 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 Jassir Witta see?
- In 2024, CMS data shows 540 Original Medicare patients and 1,397 services for Jassir Witta. This counts Original Medicare only and measures volume, not quality.
- What is Jassir Witta's NPI number?
- 1851524284. 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 Jassir Witta, 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 | 540 |
|---|---|
| Services billed to Medicare | 1,397 |
| Different services or procedures | 37 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Destruction of polyp or growth of large bowel using a flexible endoscope (45388)265 services
- Biopsy of large bowel using a flexible endoscope (45380)239 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)232 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)213 services
- Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm (43249)116 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%
- Arthritis45%
- Anxiety38%
- Diabetes27%
- Depression27%
Hospitals where Jassir Witta works
Medicare's Facility Affiliation Data lists Jassir Witta 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.
- Southern NH Medical CenterNashua, NH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 300020
Practice locations
Addresses where Jassir Witta is enrolled with Medicare (CMS data updated October 2, 2026).
- 10 Jones RdMilford, NH 03055 (603) 672‑7600
- 10 Prospect StNashua, NH 03060
- 8 Prospect StNashua, NH 03060
- 8 Prospect St NNashua, NH 03060
Group practices
Medicare enrollment lists Jassir Witta as a member of this group (CMS data updated October 2, 2026).
- Foundation Medical Partners Inc317 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in New Hampshire
Clinicians with the same Medicare primary specialty in New Hampshire — not a recommendation.
Other clinicians in Foundation Medical Partners Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1993 (33 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851524284 |
| 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