Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ann Elizabeth Dettlaff, APNP
Nurse Practitioner in Oshkosh, WI · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1215236278
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Registry record
Entity type Individual (Type 1)
Name Ann Elizabeth Dettlaff
Credential APNP
Sex Female
Practice address 250 W 6th Ave, Oshkosh, WI, 54902
Phone (920) 237-5000
Fax (920) 237-5011
Enumeration date Mar 16, 2011
Last updated in NPPES Apr 29, 2026
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 4360-033 (WI) Primary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 4360-33 (WI) Secondary
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 100014463 | Medicaid | WI | - |
| 1215236278 | Medicaid | WI | - |
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.
Frequently asked questions
What specialty is Ann Dettlaff?
Ann Dettlaff is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → David Maruska Family Medicine Physician · Oshkosh, WI NPI 1508848847 Glenn Vogelsang Family Medicine Physician · Oshkosh, WI NPI 1538245642 Jessica Bielmeier Family Nurse Practitioner · Oshkosh, WI NPI 1235253030 Aleem Bakhtiar Emergency Medicine Physician · Oshkosh, WI NPI 1053706044 Ramez Hoveydai Sports Medicine (Family Medicine) Physician · Oshkosh, WI NPI 1548649478 Ashley Andrus Nurse Practitioner · Oshkosh, WI NPI 1578948899 Brittany Vanden Heuvel Pediatric Nurse Practitioner · Oshkosh, WI NPI 1881103893 Rebecca Waldman Pediatrics Physician · Oshkosh, WI NPI 1356081434
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-29.