Kay Zier, APNP
NPI 1053859942 · Nurse Practitioner · Oshkosh, WI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kay Zier, APNP is a Nurse Practitioner provider in Oshkosh, WI (NPI 1053859942).
Provider details
- NPI number
- 1053859942
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APNP
- Sex
- Female
- Sole proprietor
- No
- License
- 6884-033 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
78 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 62 | $102 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 16 | $104 |
Typical Medicare-allowed amounts for these services range $102–$104 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 54 | 20 |
| Amlodipine Besylate | 38 | 14 |
| Omeprazole | 36 | 13 |
| Levothyroxine Sodium | 31 | — |
| Hydrochlorothiazide | 28 | — |
| Losartan Potassium | 26 | 11 |
| Citalopram Hydrobromide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-02-10
- Last updated
- 2026-03-18
- Certified
- 2026-03-18
Frequently asked questions
- What is Kay Zier's NPI number?
- Kay Zier's National Provider Identifier (NPI) is 1053859942, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kay Zier's specialty?
- Kay Zier is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kay Zier located?
- Kay Zier's practice location on file with NPPES is 855 N Westhaven Dr, Oshkosh, WI 54904-7668.
- What is Kay Zier's phone number?
- The practice phone number listed in the NPPES registry for Kay Zier is (920) 303-8700.
- Does Kay Zier accept Medicare?
- Kay Zier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kay Zier's NPI active?
- Yes — Kay Zier's NPI (1053859942) is active in the NPPES registry as of the last update on 2026-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.