Quick answers
- Does Ammar F. Nasrallah accept Medicare assignment?
- Yes. Medicare's clinician data says Ammar F. Nasrallah 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 Ammar F. Nasrallah see?
- In 2024, CMS data shows 518 Original Medicare patients and 91,074 services for Ammar F. Nasrallah. This counts Original Medicare only and measures volume, not quality.
- What is Ammar F. Nasrallah's NPI number?
- 1700841566. 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 Ammar F. Nasrallah, 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 | 518 |
|---|---|
| Services billed to Medicare | 91,074 |
| Different services or procedures | 93 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Injection, daptomycin, 1 mg (J0878)23,400 services
- Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) (Q0138)6,120 services
- Injection, vedolizumab, intravenous, 1 mg (J3380)6,000 services
- Injection, infliximab-abda, biosimilar, (renflexis), 10 mg (Q5104)4,217 services
- Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) (J0129)1,900 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 cholesterol72%
- High blood pressure70%
- Arthritis48%
- Diabetes36%
- Chronic kidney disease33%
- Depression31%
Hospitals where Ammar F. Nasrallah works
Medicare's Facility Affiliation Data lists Ammar F. Nasrallah 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.
- Fort Memorial HospitalFort Atkinson, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520071
- SSM Health St Clare Hospital - BarabooBaraboo, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520057
- SSM Health St Mary's Hospital - JanesvilleJanesville, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520208
- SSM Health St Mary's Hospital - MadisonMadison, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520083
- The Monroe ClinicMonroe, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520028
Practice locations
Addresses where Ammar F. Nasrallah is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 15; the Medicare profile lists all.
- 10 Tower DrSun Prairie, WI 53590 (608) 825‑3500
- 1211 Fish Hatchery RdMadison, WI 53715 (608) 252‑8000
- 1821 S Stoughton RdMadison, WI 53716 (608) 260‑6000
- 225 Church StStoughton, WI 53589 (608) 877‑2777
- 2805 Hunters TrlPortage, WI 53901 (608) 745‑5900
Group practices
Medicare enrollment lists Ammar F. Nasrallah as a member of this group (CMS data updated October 2, 2026).
- Dean Health Systems Inc1,159 clinicians in the group
Specialties
- Infectious Diseaseprimary
Other infectious disease doctors in Sun Prairie
Clinicians with the same Medicare primary specialty in Sun Prairie, WI — not a recommendation.
Other clinicians in Dean Health Systems Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1999 (27 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) | 1700841566 |
| 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