Mark Willenbring, MD
Mark Willenbring, MD is a Psychiatry Physician in Saint Paul, MN, registered under NPI 1003930124. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 745 VICTORIA ST S, Saint Paul, MN 55102. 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 |
|---|---|---|
| 22040 | MN | Forensic Psychiatry Physician |
| 22040 | MN | Addiction Psychiatry Physician |
| 22040 | MN | Psychiatry Physician primary |
This provider holds licence 22040 issued in MN. 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 - Psychiatry
- PAC ID
- 1850302597
Enrolled in Medicare 16 times, across 16 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Minnesota | I20100114000834 | Practitioner - Psychiatry |
| New York | I20240208004211 | Practitioner - Psychiatry |
| North Carolina | I20240621002495 | Practitioner - Psychiatry |
| Rhode Island | I20240808000951 | Practitioner - Psychiatry |
| New Mexico | I20240809000993 | Practitioner - Psychiatry |
| Oklahoma | I20240809001344 | Practitioner - Psychiatry |
| Arkansas | I20240809001869 | Practitioner - Psychiatry |
| Colorado | I20240809002780 | Practitioner - Psychiatry |
| Illinois | I20240916003093 | Practitioner - Psychiatry |
| North Dakota | I20240917004971 | Practitioner - Psychiatry |
| California | I20240919001970 | Practitioner - Psychiatry |
| Michigan | I20240926001202 | Practitioner - Psychiatry |
| South Carolina | I20240926003415 | Practitioner - Psychiatry |
| West Virginia | I20240926003763 | Practitioner - Psychiatry |
| Ohio | I20241007000909 | Practitioner - Psychiatry |
| Indiana | I20241126001647 | Practitioner - Psychiatry |
Medicare enrolment is recorded as approved under the provider type Practitioner - Psychiatry. There are 16 separate enrolment records across 16 states (MN, NY, NC, RI, NM, OK, AR, CO, IL, ND, CA, MI, SC, WV, OH, IN). 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 Psychiatry covers
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems. NUCC Health Care Provider Taxonomy, code 2084P0800X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2084F0202X | Forensic Psychiatry Physician Forensic Psychiatry | 22040 | MN | |
| 2084P0802X | Addiction Psychiatry Physician Addiction Psychiatry | 22040 | MN | |
| 2084P0800X | Psychiatry Physician Psychiatry | 22040 | MN | primary |
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 | 1003930124 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 16, 2007 |
| Last updated | Oct 12, 2023 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | MD |
| Practice address |
745 VICTORIA ST S Saint Paul, MN 55102 (202) 379-6736 |
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 | 0 | 0 | 3 | 9 | 3 | 0 | 1 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 9 | 3 | 0 | 1 | 4 |
Sum = 46 · next multiple of 10 = 50 · 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.