Holly Mook
NPI 1386977791 · Clinical Social Worker · Helena, MT
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Holly Mook is a Clinical Social Worker provider in Helena, MT (NPI 1386977791).
Provider details
- NPI number
- 1386977791
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- 1030 (MT)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
16 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-09-16
- Last updated
- 2025-05-21
- Certified
- 2025-05-21
Frequently asked questions
- What is Holly Mook's NPI number?
- Holly Mook's National Provider Identifier (NPI) is 1386977791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Holly Mook's specialty?
- Holly Mook is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Holly Mook located?
- Holly Mook's practice location on file with NPPES is 1930 9th Ave, Helena, MT 59601-4759.
- What is Holly Mook's phone number?
- The practice phone number listed in the NPPES registry for Holly Mook is (406) 457-0000.
- Does Holly Mook accept Medicare?
- Holly Mook is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Holly Mook's NPI active?
- Yes — Holly Mook's NPI (1386977791) is active in the NPPES registry as of the last update on 2025-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.