Dr. Alexander Spencer Tretinyak, MD
Dr. Alexander Spencer Tretinyak is a Vascular Surgery Physician provider (Surgery) practicing in Appleton, WI, registered in the NPPES registry with NPI 1073566030 since 2006. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1073566030 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Alexander Spencer Tretinyak |
| Credential | MD |
| Sex | Male |
| Practice address | 1818 N MEADE ST, SUITE 240 WEST, Appleton, WI, 54911 |
| Phone | 9207318131 |
| Fax | 9208320444 |
| Enumeration date | 2006-05-18 |
| Last updated in NPPES | 2013-07-16 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 2086S0129X | Vascular Surgery Physician | Primary | 60546-20 | WI |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Copy-ready billing details
Provider: Alexander Tretinyak, MD NPI: 1073566030 Taxonomy: 2086S0129X (Vascular Surgery Physician) Address: 1818 N MEADE ST, SUITE 240 WEST, Appleton, WI, 54911
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1265799290 | Eric Winkel | Individual | Hospitalist Physician | Appleton, WI |
| 1588666853 | Appleton Emergency Services S C | Organization | Emergency Medicine Physician | Appleton, WI |
| 1689679953 | Michael Hooker | Individual | Hospitalist Physician | Appleton, WI |
| 1346249323 | Honnie Bermas | Individual | Surgery Physician | Appleton, WI |
| 1306846894 | Steven Mcintyre | Individual | Emergency Medical Services (Emergency Medicine) Physician | Appleton, WI |
| 1194725879 | Cyril Walsh | Individual | Emergency Medical Services (Emergency Medicine) Physician | Appleton, WI |
| 1558361238 | Sharon Thorson | Individual | Family Nurse Practitioner | Appleton, WI |
| 1902806698 | Brad Sandleback | Individual | Emergency Medical Services (Emergency Medicine) Physician | Appleton, WI |
Verify this record
Cross-check NPI 1073566030 against the authoritative CMS record: view Dr. Alexander Spencer Tretinyak on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-09. Provider record last updated 2013-07-16.