Maria Hillmer, APNP
NPI 1598188138 · Nurse Practitioner · Grafton, WI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Hillmer, APNP is a Nurse Practitioner provider in Grafton, WI (NPI 1598188138).
Provider details
- NPI number
- 1598188138
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APNP
- Sex
- Female
- Sole proprietor
- No
- License
- 144264-30 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,248 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 351 | $74 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 292 | $6 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 175 | $44 |
| Destruction of Skin Growth, 1-14 Growths17110 | 111 | $91 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 94 | $105 |
| Biopsy of Related Skin Growth, First Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 81 | 40 |
| Clobetasol Propionate | 56 | 37 |
| Ciclopirox Olaminebrand: Ciclopirox | 41 | 20 |
| Fluocinonide | 31 | 21 |
| Triamcinolone Acetonide | 29 | 23 |
| Hydrocortisone | 23 | 21 |
| Fluorouracil | 22 | 20 |
| Metronidazole | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,623 across 137 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1440 N 25th StSheboygan, WI 53081-3108Phone: (920) 457-9100Fax: (920) 457-1461
Registry dates
- Enumerated
- 2014-02-03
- Last updated
- 2021-02-18
- Certified
- 2021-02-18
Frequently asked questions
- What is Maria Hillmer's NPI number?
- Maria Hillmer's National Provider Identifier (NPI) is 1598188138, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Hillmer's specialty?
- Maria Hillmer is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Maria Hillmer located?
- Maria Hillmer's practice location on file with NPPES is 1245 Cheyenne Ave, Grafton, WI 53024-9323.
- What is Maria Hillmer's phone number?
- The practice phone number listed in the NPPES registry for Maria Hillmer is (262) 377-2222.
- Does Maria Hillmer accept Medicare?
- Maria Hillmer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Hillmer's NPI active?
- Yes — Maria Hillmer's NPI (1598188138) is active in the NPPES registry as of the last update on 2021-02-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.