Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Catherine Louise Ash, MD

Individual provider Internal Medicine Physician · NPI 1861874059

Catherine Louise Ash, MD is an Internal Medicine in Edwardsville, Illinois. Graduated from Saint Louis University School of Medicine in 2015, 11 years ago. Practices with Fairview Heights Medical Group SC, a 448-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Illinois and Missouri.

Years since qualifying
11
Trained at
Saint Louis University School of Medicine
Licensed in
IL, MO
In the registry since
2015
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2122 Troy Rd Ste 130
Edwardsville, IL 62025-2540
Phone: (618) 800-4500
Fax: (618) 800-4501
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 6435 Chippewa St, Saint Louis, MO 63109 — (314) 366-3000

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036177442 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 2018022561 (MO)

Record details

NPI number1861874059
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 24, 2015
Last updated in NPPESDecember 18, 2025
Certification dateDecember 18, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolSAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2015 (11 years in practice)
Group practice Fairview Heights Medical Group Sc — 448 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Other providers in Edwardsville