Catherine Mayer, DO
Catherine Mayer is a Surgery Physician provider (Surgery) practicing in Oshkosh, WI, registered in the NPPES registry with NPI 1649891284 since 2020. The credential DO stands for Doctor of Osteopathic Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1649891284 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Catherine Mayer |
| Credential | DO |
| Sex | Female |
| Practice address | 855 N WESTHAVEN DR, Oshkosh, WI, 54904 |
| Phone | 9203038700 |
| Enumeration date | 2020-05-06 |
| Last updated in NPPES | 2025-09-17 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208600000X | Surgery Physician | Primary | 76035-21 | WI |
DO — Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 100183475 | Medicaid | WI | — |
Copy-ready billing details
Provider: Catherine Mayer, DO NPI: 1649891284 Taxonomy: 208600000X (Surgery Physician) Address: 855 N WESTHAVEN DR, Oshkosh, WI, 54904
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1629995964 | Taylor Hanke | Individual | Family Nurse Practitioner | Oshkosh, WI |
| 1427054543 | Erin Krueger | Individual | Audiologist-Hearing Aid Fitter | Oshkosh, WI |
| 1538169214 | Stephen Kennebeck | Individual | Physician Assistant | Oshkosh, WI |
| 1578563946 | Daniel Hafner | Individual | Physician Assistant | Oshkosh, WI |
| 1669474441 | Steven Hooyman | Individual | Certified Registered Nurse Anesthetist | Oshkosh, WI |
| 1144212994 | Marc Jennings | Individual | Physician Assistant | Oshkosh, WI |
| 1336131101 | Edward Lake | Individual | Nephrology Physician | Oshkosh, WI |
| 1124010749 | Phyllis Lee | Individual | Family Medicine Physician | Oshkosh, WI |
Verify this record
Cross-check NPI 1649891284 against the authoritative CMS record: view Catherine Mayer 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 specialty is Catherine Mayer?
Is this the official NPI registry?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2025-09-17.