Quick answers
- Does Andrew Mahtani accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew Mahtani 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 Andrew Mahtani see?
- In 2024, CMS data shows 492 Original Medicare patients and 1,289 services for Andrew Mahtani. This counts Original Medicare only and measures volume, not quality.
- What is Andrew Mahtani's NPI number?
- 1659579613. 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 Andrew Mahtani, 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 | 492 |
|---|---|
| Services billed to Medicare | 1,289 |
| Different services or procedures | 22 |
| Participating Medicare provider | Yes |
| Average age of these patients | 80 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)347 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)217 services
- Critical care, first 30-74 minutes (99291)142 services
- Hospital discharge day management, more than 30 minutes (99239)137 services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)111 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%
- Arthritis69%
- Chronic kidney disease55%
- Heart failure54%
- Ischemic heart disease53%
Hospitals where Andrew Mahtani works
Medicare's Facility Affiliation Data lists Andrew Mahtani 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.
- HSHS St Elizabeth's HospitalO Fallon, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140187
- St Anthonys Memorial HospitalEffingham, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140032
- St Joseph's HospitalHighland, IL · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 141336
- St Josephs HospitalBreese, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140145
Practice locations
Addresses where Andrew Mahtani is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Saint Anthonys WayAlton, IL 62002 (618) 465‑2571
- 1 Saint Elizabeth BlvdO Fallon, IL 62269 (618) 234‑2120
- 12866 Troxler AveHighland, IL 62249 (618) 651‑2658
- 503 N Maple StEffingham, IL 62401 (217) 342‑2121
- 9515 Holy Cross LnBreese, IL 62230 (618) 526‑4511
Group practices
Medicare enrollment lists Andrew Mahtani as a member of this group (CMS data updated October 2, 2026).
- Cep America-Illinois Hospitalists, LLP196 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Alton
Clinicians with the same Medicare primary specialty in Alton, IL — not a recommendation.
Other clinicians in Cep America-Illinois Hospitalists, LLP
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2006 (20 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1659579613 |
| 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