Donnan Ocarroll, MD
Donnan Ocarroll, MD is a Forensic Pathology Physician in Eau Claire, WI, registered under NPI 1720025349. This provider registers 12 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 900 W CLAIREMONT AVE, Eau Claire, WI 54701. 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 |
|---|---|---|
| 19897020 | WI | Forensic Pathology Physician primary |
| 19897020 | WI | Blood Banking & Transfusion Medicine… |
| 19897020 | WI | Cytopathology Physician |
| 19897020 | WI | Dermatopathology (Pathology) Physician |
| 19897020 | WI | Hematology (Pathology) Physician |
| 19897020 | WI | Immunopathology Physician |
| 19897020 | WI | Medical Microbiology Physician |
| 19897020 | WI | Neuropathology Physician |
| 19897020 | WI | Anatomic Pathology & Clinical Pathology… |
| 19897020 | WI | Chemical Pathology Physician |
| 19897020 | WI | Clinical Pathology/Laboratory Medicine… |
| 19897020 | WI | Pediatric Pathology Physician |
This provider holds licence 19897020 issued in WI. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Forensic Pathology covers
A forensic pathologist is expert in investigating and evaluating cases of sudden, unexpected, suspicious and violent death as well as other specific classes of death defined by law. The forensic pathologist serves the public as coroner or medical examiner, or by performing medicolegal autopsies for such officials. NUCC Health Care Provider Taxonomy, code 207ZF0201X
All registered taxonomy codes
This provider registers 12 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207ZF0201X | Forensic Pathology Physician Forensic Pathology | 19897020 | WI | primary |
| 207ZB0001X | Blood Banking & Transfusion Medicine Physician Blood Banking & Transfusion Medicine | 19897020 | WI | |
| 207ZC0500X | Cytopathology Physician Cytopathology | 19897020 | WI | |
| 207ZD0900X | Dermatopathology (Pathology) Physician Dermatopathology | 19897020 | WI | |
| 207ZH0000X | Hematology (Pathology) Physician Hematology | 19897020 | WI | |
| 207ZI0100X | Immunopathology Physician Immunopathology | 19897020 | WI | |
| 207ZM0300X | Medical Microbiology Physician Medical Microbiology | 19897020 | WI | |
| 207ZN0500X | Neuropathology Physician Neuropathology | 19897020 | WI | |
| 207ZP0102X | Anatomic Pathology & Clinical Pathology Physician Anatomic Pathology & Clinical Pathology | 19897020 | WI | |
| 207ZP0104X | Chemical Pathology Physician Chemical Pathology | 19897020 | WI | |
| 207ZP0105X | Clinical Pathology/Laboratory Medicine Physician Clinical Pathology/Laboratory Medicine | 19897020 | WI | |
| 207ZP0213X | Pediatric Pathology Physician Pediatric Pathology | 19897020 | WI |
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 | 1720025349 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 1, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
900 W CLAIREMONT AVE Eau Claire, WI 54701 (715) 839-4121 |
| Mailing address |
2715 WEST FRANK STREET Eau Claire, WI 54703 |
| Other identifiers |
30538100
· Medicaid (WI) |
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 | 2 | 0 | 0 | 2 | 5 | 3 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 4 | 0 | 0 | 2 | 1 | 3 | 8 |
Sum = 51 · next multiple of 10 = 60 · check digit = 9 · actual last digit = 9
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.