CATHERINE LOUISE ASH M.D.
NPI 1861874059
Internal Medicine in Edwardsville, IL
About Catherine Louise Ash M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CATHERINE LOUISE ASH M.D. (NPI 1861874059) is an individual internal medicine provider in Edwardsville, Illinois, licensed in Illinois (036177442) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS, is affiliated with Alton Memorial Hospital, and maintains a secondary practice location in Saint Louis.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Catherine Louise Ash M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Areas of Expertise CMS Part B claims 9
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Alton Memorial Hospital
Acute Care Hospitals · Alton, ILMemorial Hospital
Acute Care Hospitals · Belleville, ILMercy Hospital St Louis
Acute Care Hospitals · Saint Louis, MOMercy Hospital South
Acute Care Hospitals · Saint Louis, MOChristian Hospital Northeast
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 62025 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
EDWARDSVILLE, IL 62025
EDWARDSVILLE, IL 62025
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Catherine Ash's NPI number?
The NPI number for Catherine Ash is 1861874059. It was assigned to this individual provider in the NPPES registry on June 24, 2015. The provider is also known as Catherine Louise Duncan.
Where is Catherine Ash located?
Catherine Ash practices at 2122 Troy Rd Ste 130, Edwardsville, IL 62025. The listed phone number is (618) 800-4500.
What is Catherine Ash's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Catherine Ash enrolled in Medicare?
Yes. Catherine Ash is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does Catherine Ash accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 4 other insurers list Catherine Ash as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Catherine Ash affiliated with any hospitals?
According to CMS data, Catherine Ash is affiliated with Alton Memorial Hospital, Memorial Hospital, Mercy Hospital St Louis, Mercy Hospital South and Christian Hospital Northeast.
When was this NPI record last updated?
The NPPES record for Catherine Ash was last updated on December 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
