Mark Erickson, DDS
Mark Erickson, DDS is a provider specialising in Oral and Maxillofacial Surgery (Dentist) in La Crosse, WI, registered under NPI 1144587551.
Getting there
The practice address on file is 1836 SOUTH AVE, La Crosse, WI 54601. 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 |
|---|---|---|
| 7230 | WI | Oral and Maxillofacial Surgery (Dentist) primary |
This provider holds licence 7230 issued in WI. 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 - Maxillofacial Surgery
- PAC ID
- 5395069280
Enrolled in Medicare 3 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Wisconsin | I20180820002411 | Practitioner - Maxillofacial Surgery |
| Minnesota | I20181214001820 | Practitioner - Dentist |
| Minnesota | I20260513000074 | Practitioner - Oral Surgery |
Medicare enrolment is recorded as approved under the provider type Practitioner - Maxillofacial Surgery. There are 3 separate enrolment records across 2 states (WI, 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.
What Oral and Maxillofacial Surgery covers
The specialty of dentistry which includes the diagnosis, surgical and adjunctive treatment of diseases, injuries and defects involving both the functional and esthetic aspects of the hard and soft tissues of the oral and maxillofacial region. NUCC Health Care Provider Taxonomy, code 1223S0112X
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 | 1144587551 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 23, 2012 |
| Last updated | Mar 21, 2022 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | DDS |
| Practice address |
1836 SOUTH AVE La Crosse, WI 54601 (608) 782-7300 |
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 | 4 | 4 | 5 | 8 | 7 | 5 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 8 | 4 | 1 | 8 | 5 | 5 | 1 |
Sum = 59 · next multiple of 10 = 60 · check digit = 1 · actual last digit = 1
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.