Oaac, S.C.
Oaac, S.C. is a healthcare organization registered as Pain Medicine (Anesthesiology) Physician in Oconomowoc, WI, holding Type 2 (organization) NPI 1356397475 since 2006. The authorized official on file is Terrence Gaynor, Authorized Official.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1356397475 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Oaac, S.C. |
| Practice address | 791 E SUMMIT AVE, Oconomowoc, WI, 53066 |
| Phone | 2625699400 |
| Enumeration date | 2006-05-26 |
| Last updated in NPPES | 2025-09-11 |
Authorized official
| Name | Terrence Gaynor |
|---|---|
| Title | Authorized Official |
| Phone | 2625699400 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207L00000X | Anesthesiology Physician | Secondary | — | — |
| 207LP2900X | Pain Medicine (Anesthesiology) Physician | Primary | — | — |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 32845700 | Medicaid | WI | — |
Copy-ready billing details
Provider: Oaac, S.C. NPI: 1356397475 Taxonomy: 207LP2900X (Pain Medicine (Anesthesiology) Physician) Address: 791 E SUMMIT AVE, Oconomowoc, WI, 53066
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1720060585 | Lake Country Emergency Physicians | Organization | Emergency Medicine Physician | Oconomowoc, WI |
| 1447233374 | Howard Elconin | Individual | Anesthesiology Physician | Oconomowoc, WI |
| 1033192091 | Michael J. Phillips, M.D., S.C. | Organization | Clinical Pathology/Laboratory Medicine Physician | Oconomowoc, WI |
| 1437132248 | Raina Hollenbaugh | Individual | Anesthesiology Physician | Oconomowoc, WI |
| 1124001938 | Michael Phillips | Individual | Clinical Pathology/Laboratory Medicine Physician | Oconomowoc, WI |
| 1710960422 | Jeffrey Ceschi | Individual | Anesthesiology Physician | Oconomowoc, WI |
| 1194708644 | Palmira Janusonis | Individual | Anesthesiology Physician | Oconomowoc, WI |
| 1407831274 | Paul Rehnstrom | Individual | Emergency Medicine Physician | Oconomowoc, WI |
Verify this record
Cross-check NPI 1356397475 against the authoritative CMS record: view Oaac, S.C. 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
What type of organization is Oaac, S.C.?
What is a Type 2 NPI?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2025-09-11.