Robert Groff, DO
Robert Groff, DO is a provider specialising in Military Health Care Provider in O Fallon, IL, registered under NPI 1154028413.
Getting there
The practice address on file is 3 SAINT ELIZABETH BLVD STE 4000, O Fallon, IL 62269. 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
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
- Status
- Approved
- Provider type
- Order And Referring Only - Family Practice
- PAC ID
- 8729514088
Medicare enrolment is recorded as approved under the provider type Order And Referring Only - Family Practice. 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 Military Health Care Provider covers
Active duty military health care providers not otherwise classified who need to be separately identified for operational, clinical, or administrative processes. NUCC Health Care Provider Taxonomy, code 171000000X
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 | 1154028413 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 7, 2023 |
| Last updated | May 15, 2024 |
| Status | Active |
| Sole proprietor | No |
| Credential | DO |
| Practice address |
3 SAINT ELIZABETH BLVD STE 4000 O Fallon, IL 62269 (618) 256-9355 Fax (618) 206-2332 |
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 | 5 | 4 | 0 | 2 | 8 | 4 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 1 | 4 | 0 | 2 | 7 | 4 | 2 |
Sum = 47 · next multiple of 10 = 50 · check digit = 3 · actual last digit = 3
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.