Gretchen Zirbel, MD
NPI 1588658371 · Dermatology Physician · Brookfield, WI
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gretchen Zirbel, MD is a Dermatology Physician provider in Brookfield, WI (NPI 1588658371).
Provider details
- NPI number
- 1588658371
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 32404020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,052 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 757 | $6 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 582 | $86 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 215 | $55 |
| Therapy Procedure Using Ultraviolet Radiation With Tar Or Petroleum Jelly Application96910 | 110 | $113 |
| Biopsy of Related Skin Growth, First Growth11102 | 102 | $89 |
| Destruction of Skin Growth, 1-14 Growths17110 |
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 |
|---|---|---|
| Ketoconazole | 97 | 55 |
| Triamcinolone Acetonide | 95 | 65 |
| Clobetasol Propionate | 81 | 57 |
| Hydrocortisone | 73 | 50 |
| Metronidazole | 54 | 30 |
| Betamethasone/Propylene Glycbrand: Betamethasone Diprop Augmented | 53 | 45 |
| Valacyclovir Hclbrand: Valacyclovir | 41 | 22 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$200 across 2 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
Registry dates
- Enumerated
- 2005-09-07
- Last updated
- 2008-04-20
Frequently asked questions
- What is Gretchen Zirbel's NPI number?
- Gretchen Zirbel's National Provider Identifier (NPI) is 1588658371, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretchen Zirbel's specialty?
- Gretchen Zirbel is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Gretchen Zirbel located?
- Gretchen Zirbel's practice location on file with NPPES is 13800 W North Ave, Brookfield, WI 53005-4974.
- What is Gretchen Zirbel's phone number?
- The practice phone number listed in the NPPES registry for Gretchen Zirbel is (262) 754-4488.
- Does Gretchen Zirbel accept Medicare?
- Gretchen Zirbel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gretchen Zirbel's NPI active?
- Yes — Gretchen Zirbel's NPI (1588658371) is active in the NPPES registry as of the last update on 2008-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.