Evan Roller, MD
Evan Roller, MD is a Critical Care Medicine (Anesthesiology) Physician in Saint Louis, MO, registered under NPI 1124339494. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1 BARNES JEWISH HOSPITAL PLZ DEPT ANESTHESIOLOGY, Saint Louis, MO 63110. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 2012020847 | MO | Critical Care Medicine (Anesthesiology)… primary |
| 2012020847 | MO | Anesthesiology Physician |
This provider holds licence 2012020847 issued in MO. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Critical Care (intensivists)
- PAC ID
- 3779712260
Medicare enrolment is recorded as approved under the provider type Practitioner - Critical Care (intensivists). This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Critical Care Medicine covers
An anesthesiologist, who specializes in critical care medicine diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists. NUCC Health Care Provider Taxonomy, code 207LC0200X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207LC0200X | Critical Care Medicine (Anesthesiology) Physician Critical Care Medicine | 2012020847 | MO | primary |
| 207L00000X | Anesthesiology Physician | 2012020847 | MO |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1124339494 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 1, 2010 |
| Last updated | Apr 17, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
1 BARNES JEWISH HOSPITAL PLZ DEPT ANESTHESIOLOGY Saint Louis, MO 63110 (800) 862-9980 Fax (314) 362-1185 |
| Mailing address |
PO BOX 7412011 Chicago, IL 60674 |
| Other identifiers |
200034985
(MO) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 1 | 2 | 4 | 3 | 3 | 9 | 4 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 4 | 4 | 6 | 3 | 9 | 4 | 9 |
Sum = 66 · next multiple of 10 = 70 · check digit = 4 · actual last digit = 4
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.