Quick answers
- Does Ann Altgilbers accept Medicare assignment?
- Yes. Medicare's clinician data says Ann Altgilbers 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 Ann Altgilbers see?
- In 2024, CMS data shows 199 Original Medicare patients and 1,341 services for Ann Altgilbers. This counts Original Medicare only and measures volume, not quality.
- What is Ann Altgilbers's NPI number?
- 1447638887. 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 Ann Altgilbers, 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 | 199 |
|---|---|
| Services billed to Medicare | 1,341 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)384 services
- Blood glucose (sugar) test performed by hand-held instrument (82962)359 services
- Hemoglobin a1c level (83036)316 services
- Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (95251)247 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)23 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%
- Diabetes75%
- Arthritis53%
- Chronic kidney disease52%
- Ischemic heart disease50%
Hospitals where Ann Altgilbers works
Medicare's Facility Affiliation Data lists Ann Altgilbers 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.
- Anderson HospitalMaryville, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140289
- HSHS St Elizabeth's HospitalO Fallon, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140187
- 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 Ann Altgilbers is enrolled with Medicare (CMS data updated October 2, 2026).
- 2133 Vadalabene Dr, Suite 1Maryville, IL 62062 (618) 288‑4350
Group practices
Medicare enrollment lists Ann Altgilbers as a member of this group (CMS data updated October 2, 2026).
- Anderson Medical Group LLC136 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Maryville
Clinicians with the same Medicare primary specialty in Maryville, IL — not a recommendation.
Other clinicians in Anderson Medical Group LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2014 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447638887 |
| 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