Mark Graeber, DPM
Mark Graeber, DPM is a provider specialising in Podiatrist in Sioux Falls, SD, registered under NPI 1770969875. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1210 W 18TH ST STE G01, Sioux Falls, SD 57104. 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 |
|---|---|---|
| 245 | SD | Podiatrist primary |
| PO3985 | FL | Public Medicine Podiatrist |
| PO3985 | FL | Foot & Ankle Surgery Podiatrist |
| 1099 | MN | Podiatrist |
| PO3985 | FL | Primary Podiatric Medicine Podiatrist |
Licences are recorded in 3 states: SD, FL, MN. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Podiatry
- PAC ID
- 5597016246
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| South Dakota | I20220309002353 | Practitioner - Podiatry |
| Minnesota | I20220310002373 | Practitioner - Podiatry |
Medicare enrolment is recorded as approved under the provider type Practitioner - Podiatry. There are 2 separate enrolment records across 2 states (SD, MN). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
Licensed in 3 states
This provider holds licences in 3 states: Florida, Minnesota and South Dakota. The practice address on file is in Sioux Falls, SD, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Podiatrist covers
A podiatrist is a person qualified by a Doctor of Podiatric Medicine (D.P.M.) degree, licensed by the state, and practicing within the scope of that license. Podiatrists diagnose and treat foot diseases and deformities. They perform medical, surgical and other operative procedures, prescribe corrective devices and prescribe and administer drugs and physical therapy. NUCC Health Care Provider Taxonomy, code 213E00000X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 213E00000X | Podiatrist | 245 | SD | primary |
| 213EP0504X | Public Medicine Podiatrist Public Medicine | PO3985 | FL | |
| 213ES0103X | Foot & Ankle Surgery Podiatrist Foot & Ankle Surgery | PO3985 | FL | |
| 213E00000X | Podiatrist | 1099 | MN | |
| 213EP1101X | Primary Podiatric Medicine Podiatrist Primary Podiatric Medicine | PO3985 | FL |
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 | 1770969875 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 31, 2015 |
| Last updated | Mar 12, 2026 |
| Status | Active |
| Sole proprietor | No |
| Credential | DPM |
| Practice address |
1210 W 18TH ST STE G01 Sioux Falls, SD 57104 (605) 328-2663 |
| Mailing address |
PO BOX 5074 Sioux Falls, SD 57117 |
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 | 7 | 7 | 0 | 9 | 6 | 9 | 8 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 5 | 0 | 9 | 6 | 9 | 8 | 5 |
Sum = 75 · next multiple of 10 = 80 · check digit = 5 · actual last digit = 5
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.