Quick answers
- Which hospitals does Margo S. McMahon work at?
- Medicare's official clinician data lists Margo S. McMahon at 2 hospitals: Sarah Bush Lincoln Health Center and St Anthonys Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Margo S. McMahon see patients?
- Medicare's clinician data lists 5 practice locations, including Effingham, IL and Stewardson, IL. Call before your visit to confirm the address.
- What is Margo S. McMahon's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Margo S. McMahon accept Medicare assignment?
- Yes. Medicare's clinician data says Margo S. McMahon accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Margo S. McMahon?
- (217) 238-4634, as listed in official Medicare / NPI Registry data.
- What is Margo S. McMahon's NPI number?
- 1336381201. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Margo S. McMahon works
Medicare's Facility Affiliation Data lists Margo S. McMahon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Sarah Bush Lincoln Health CenterMattoon, IL · Acute Care Hospital · CCN 140189
- St Anthonys Memorial HospitalEffingham, IL · Acute Care Hospital · CCN 140032
Practice locations
Addresses where Margo S. McMahon is enrolled with Medicare (CMS data updated 2026-10-02).
- 1303 W Evergreen Ave, Suite 202Effingham, IL 62401 (217) 238‑4634
- 300 N MapleEffingham, IL 62401 (217) 528‑7541
- 300 N Maple St PO Box, Suite 1268Effingham, IL 62401
- 421 S Pine StStewardson, IL 62463 (217) 528‑7541
- 801 W Temple AveEffingham, IL 62401 (217) 347‑1690
Group practices
Medicare enrollment lists Margo S. McMahon as a member of these groups (CMS data updated 2026-10-02).
- Springfield Clinic, LLP687 clinicians in the group
- Sarah Bush Lincoln Health Center419 clinicians in the group
- Vituity - Illinois Auc LLP36 clinicians in the group
- Marshall Clinic Effingham S C14 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Effingham
Clinicians with the same Medicare primary specialty in Effingham, IL — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Medical school | Indiana University School Of Medicine |
| Graduation year | 2008 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336381201 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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