Mary Williams, CNM
NPI 1578807673 · Advanced Practice Midwife · Green Bay, WI
Enrolled with Medicare as Practitioner - Certified Nurse Midwife (cnm) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Williams, CNM is a Advanced Practice Midwife provider in Green Bay, WI (NPI 1578807673).
Provider details
- NPI number
- 1578807673
- Entity type
- Individual
- Primary specialty
- Advanced Practice MidwifePhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CNM
- Sex
- Female
- Sole proprietor
- No
- License
- 148871-32 (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 tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clobetasol Propionate | 20 | 11 |
| Valacyclovir Hclbrand: Valacyclovir | 17 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-11-15
- Last updated
- 2016-09-21
Frequently asked questions
- What is Mary Williams's NPI number?
- Mary Williams's National Provider Identifier (NPI) is 1578807673, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Williams's specialty?
- Mary Williams is listed in the NPPES registry with a primary specialty of Advanced Practice Midwife (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Williams located?
- Mary Williams's practice location on file with NPPES is 1715 Dousman St, Green Bay, WI 54303-3211.
- What is Mary Williams's phone number?
- The practice phone number listed in the NPPES registry for Mary Williams is (920) 496-4700.
- Does Mary Williams accept Medicare?
- Mary Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Williams's NPI active?
- Yes — Mary Williams's NPI (1578807673) is active in the NPPES registry as of the last update on 2016-09-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.