Doctor profile · Federal record
Dr. Catherine Ash, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Internal Medicine Physician · Edwardsville, IL
- NPI 1861874059
- Accepts Medicare
- 11 yrs in practice
- Licensed in 2 states
- Female
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
2122 Troy RD Ste 130
Edwardsville, IL 620252540
(618) 800-4500
fax (618) 800-4501 - Additional location
-
6435 Chippewa St
Saint Louis, MO 63109
(314) 366-3000
fax (314) 366-3001 - Mailing address
-
'Po Box 959203 St Louis Mo 63195'
Saint Louis, MO 631950001
Credentials & registration
- NPI registered
- June 2015 — 11 yrs on file
- Profile last updated
- December 18, 2025
- Year of graduation
- 2015 — 11 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (2)
- Illinois #036177442 · Missouri #2018022561
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1861874059. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
308
Distinct HCPCS
6
Medicare allowed
$28,798
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 110 | 86 | $126 | |
36415 |
Insertion of needle into vein for collection of blood sample | 78 | 62 | $8 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 39 | 39 | $128 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 38 | 31 | $86 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 32 | 25 | $177 | |
G0008 |
Administration of influenza virus vaccine | 11 | 11 | $30 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 45. This provider delivers 6.8× the peer median.Open Payments
Industry payments received
All-time total
$88
Transactions
3
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Lilly USA, LLC | 2 | $56.32 | |
| ABBVIE INC. | 1 | $31.24 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,295
Patients
698
Total drug cost
$27,618
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 405 | 127 | $4,741 |
| Amlodipine Besylate | Generic | 226 | 73 | $1,348 |
| Levothyroxine Sodium | Generic | 222 | 64 | $3,948 |
| Gabapentin | Generic | 205 | 49 | $4,522 |
| Lisinopril | Generic | 196 | 62 | $1,548 |
| Losartan Potassium | Generic | 152 | 48 | $1,356 |
| Pantoprazole Sodium | Generic | 129 | 41 | $1,926 |
| Alendronate Sodium | Generic | 106 | 31 | $1,029 |
| Hydrochlorothiazide | Generic | 103 | 36 | $374 |
| Metformin Hcl Er (Metformin Hcl) | Brand | 100 | 32 | $1,337 |
Hospital affiliations
Frequently asked questions
What is Dr. Catherine Ash's medical specialty?
Dr. Catherine Ash practices Internal Medicine Physician in Edwardsville, IL.
Where does Dr. Catherine Ash practice?
Dr. Catherine Ash practices at 2122 Troy RD Ste 130, Edwardsville, IL 620252540. Office phone: 6188004500.
What is Dr. Catherine Ash's NPI?
Dr. Catherine Ash's National Provider Identifier (NPI) is 1861874059, issued by NPPES.
Does Dr. Catherine Ash accept Medicare assignment?
Yes. Dr. Catherine Ash accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Catherine Ash commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.