Mary Hollis
NPI 1639761323 · Mental Health Counselor · Winnetka, IL
Enrolled with Medicare as Practitioner - Mental Health Counselor · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Hollis is a Mental Health Counselor provider in Winnetka, IL (NPI 1639761323).
Provider details
- NPI number
- 1639761323
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
83% 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-02-04
- Last updated
- 2021-02-04
- Certified
- 2021-02-04
Frequently asked questions
- What is Mary Hollis's NPI number?
- Mary Hollis's National Provider Identifier (NPI) is 1639761323, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Hollis's specialty?
- Mary Hollis is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Mary Hollis located?
- Mary Hollis's practice location on file with NPPES is 117 Church Rd, Winnetka, IL 60093-3903.
- What is Mary Hollis's phone number?
- The practice phone number listed in the NPPES registry for Mary Hollis is (415) 624-5796.
- Does Mary Hollis accept Medicare?
- Mary Hollis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Hollis's NPI active?
- Yes — Mary Hollis's NPI (1639761323) is active in the NPPES registry as of the last update on 2021-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.