Ann Dettlaff, APNP
NPI 1215236278 · Nurse Practitioner · Oshkosh, WI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ann Dettlaff, APNP is a Nurse Practitioner provider in Oshkosh, WI (NPI 1215236278).
Provider details
- NPI number
- 1215236278
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APNP
- Sex
- Female
- Sole proprietor
- No
- License
- 4360-033 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 57 | 35 |
| Losartan Potassium | 35 | 23 |
| Omeprazole | 35 | 18 |
| Amlodipine Besylate | 21 | 16 |
| Levothyroxine Sodium | 20 | 15 |
| Furosemide | 19 | — |
| Pravastatin Sodium | 19 | — |
Practice location
Mailing address
Additional practice locations (1)
- 720 W. Association Dr.Appleton, WI 54914Phone: (920) 731-4354Fax: (920) 731-5021
Registry dates
- Enumerated
- 2011-03-16
- Last updated
- 2026-04-29
- Certified
- 2026-04-29
Frequently asked questions
- What is Ann Dettlaff's NPI number?
- Ann Dettlaff's National Provider Identifier (NPI) is 1215236278, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ann Dettlaff's specialty?
- Ann Dettlaff is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ann Dettlaff located?
- Ann Dettlaff's practice location on file with NPPES is 250 W 6th Ave, Oshkosh, WI 54902-5910.
- What is Ann Dettlaff's phone number?
- The practice phone number listed in the NPPES registry for Ann Dettlaff is (920) 237-5000.
- Does Ann Dettlaff accept Medicare?
- Ann Dettlaff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ann Dettlaff's NPI active?
- Yes — Ann Dettlaff's NPI (1215236278) is active in the NPPES registry as of the last update on 2026-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.