Catherine Ash, M.D.
Internal Medicine Physician · Edwardsville, IL
Catherine Ash, M.D. is an internal medicine physician with a practice address in Edwardsville, Illinois, and NPI 1861874059, issued on Jun 24, 2015. Check the license (Illinois 036177442, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Catherine Ash
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 036177442 IL
2018022561 MO
Self-reported in NPPES; status is on the state search - Practice location
- 2122 Troy RD Ste 130, Edwardsville, IL 62025
- Phone
- (618) 800-4500
- Enumerated
- Jun 24, 2015
- Entity
- Type 1 · individual
Also registered at 2122 Troy RD Ste 130
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sisay Michael Abraham, MDFamily Medicine Physician1184088312
- Megan Cox, DNP, FNPFamily Nurse Practitioner1326504135
- Marion Dessalines, PA-CPhysician Assistant1548082647
- Mei Huang, M.D.Gastroenterology Physician1417972597
- Ranita Keller, FNPFamily Nurse Practitioner1083096895
- Adrienne Kinney, NPNurse Practitioner1710489349
Verify Catherine Ash in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036177442Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
96% more Medicare Part D claims than the average internal medicine physician in 2024
5,457 Medicare Part D claims for 571 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 308 claims were for opioids.
Most prescribed
- Atorvastatin Calcium331 claims
- Amlodipine Besylate210 claims
- Levothyroxine Sodium202 claims
- Lisinopril172 claims
- Losartan Potassium139 claims
- Trazodone Hcl136 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $87.56
3 payments, mostly food and beverage; the largest payer was Lilly USA, LLC. The 65,274 providers of this specialty with any payment received $2,536.66 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
3 hospital and facility affiliations
- Aging Well Health Care, LLCSaint Louis, MO
- Fairview Heights Medical Group SCEdwardsville, IL
- Mercy Clinic East CommunitiesSaint Louis, MO
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
5 internal medicine physician records list a Edwardsville practice address
They are 5 of the 706 NPPES records with a Edwardsville practice address, and 8,522 internal medicine physician records in Illinois.
All 5 in Edwardsville → All 8,522 in Illinois → Every provider in Edwardsville →
Other internal medicine physician records in Illinois
- Peter Abadeer, D.O.Bloomington, IL1760469522
- Pamela Abadi, D.O.Winfield, IL1588820179
- Motaz Abas, MDPeoria, IL1215510201
- Elias Abate, M.D.Chicago, IL1336712199
- Maliha Abbas, D.O.Chicago, IL1174963920
- Zareena Abbas, MDChicago, IL1427078872
- Abu Abbasi, MDChicago, IL1083243877
- Ayesha Abbasi, MDChicago, IL1376216705
- Khalda Abbasi, MDNaperville, IL1487705240
- Misha Abbasi, MDChicago, IL1770111635
Common questions
What is Catherine Ash, M.D.'s NPI number?
Catherine Ash, M.D.'s National Provider Identifier (NPI) is 1861874059, issued on Jun 24, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Ash, M.D. located?
The NPPES record lists a practice address at 2122 Troy RD Ste 130, Edwardsville, IL, 62025. Phone: (618) 800-4500. Providers update this record themselves, so call before visiting.
How can I verify Catherine Ash, M.D.'s license?
NPPES lists Illinois license number 036177442, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Catherine Ash, M.D. prescribe under Medicare Part D?
In 2024, Catherine Ash, M.D. had 5,457 Medicare Part D claims for 571 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.