Quick answers
- Which hospitals does Catherine Ash work at?
- Medicare's official clinician data lists Catherine Ash at 5 hospitals: Alton Memorial Hospital, Christian Hospital Northeast, Memorial Hospital, Mercy Hospital South and Mercy Hospital St Louis. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Catherine Ash see patients?
- Medicare's clinician data lists 3 practice locations, including Edwardsville, IL and Saint Louis, MO. Call before your visit to confirm the address.
- What is Catherine Ash's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Catherine Ash accept Medicare assignment?
- Yes. Medicare's clinician data says Catherine Ash 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.
- Does Catherine Ash offer telehealth?
- Medicare's clinician data says Catherine Ash offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Catherine Ash?
- (618) 463-7600, as listed in official Medicare / NPI Registry data.
- What is Catherine Ash's NPI number?
- 1861874059. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Catherine Ash works
Medicare's Facility Affiliation Data lists Catherine Ash at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Alton Memorial HospitalAlton, IL · Acute Care Hospital · CCN 140002
- Christian Hospital NortheastSaint Louis, MO · Acute Care Hospital · CCN 260180
- Memorial HospitalBelleville, IL · Acute Care Hospital · CCN 140185
- Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · CCN 260077
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
Practice locations
Addresses where Catherine Ash is enrolled with Medicare (CMS data updated 2026-10-02).
- 2122 Troy Rd, Suite 130Edwardsville, IL 62025 (618) 463‑7600
- 6435 Chippewa StSaint Louis, MO 63109 (314) 366‑3000
- 7212 Balson AveSaint Louis, MO 63130
Group practices
Medicare enrollment lists Catherine Ash as a member of these groups (CMS data updated 2026-10-02).
- Mercy Clinic East Communities571 clinicians in the group
- Fairview Heights Medical Group SC444 clinicians in the group
- Aging Well Health Care, LLC238 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Edwardsville
Clinicians with the same Medicare primary specialty in Edwardsville, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Saint Louis University School Of Medicine |
| Graduation year | 2015 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1861874059 |
| 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