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MRS. HOLLY ELIZABETH MOOK
NPI 1386977791
Social Worker - Clinical in Helena, MT

Active since September 16, 2009PECOS Enrolled
1930 9TH AVE, HELENA, MT 59601(406) 457-0000 Get Directions Write a Review

NPPES record last updated: May 21, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mrs. Holly Elizabeth Mook NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MRS. HOLLY ELIZABETH MOOK (NPI 1386977791) is an individual clinical provider in Helena, Montana, licensed in Montana (79599) and active in the NPI registry since September 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1386977791
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMRS. HOLLY ELIZABETH MOOK
Location Address1930 9TH AVEHelena, MT 59601-4759
Mailing Address1930 9th AveHelena, MT 59601-4759 · (406) 500-2059
Phone(406) 457-0000
Sole ProprietorYes
Enumeration DateSeptember 16, 2009
Last NPPES UpdateMay 21, 2025
NPPES CertifiedMay 21, 2025
✔ NPI 1386977791 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in MT · 79599
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
Also ListedCounselor · Addiction (Substance Use Disorder)Taxonomy 101YA0400X · License 1030 (MT)
1930 9TH AVE, Helena, MT 59601
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Mountain Health CO-OP.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mrs. Holly Elizabeth Mook is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Holly Mook reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Pureview Health Center
Same address
Federally Qualified Health Center (FQHC)
1930 9TH AVE
Helena, MT 59601
  • Reassigned Medicare billing, Montana enrollment
  • 35 clinicians in this Medicare group
NPI 1740390756 (406) 457-0000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 59601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$0.00 typical visit price
range $56.81 – $172.26
Typical copayment $0.00 (range $14.20 – $43.06)
Most-billed visit code NA
Established Patient
$70.82 typical visit price
range $18.24 – $140.32
Typical copayment $17.70 (range $4.56 – $35.08)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

REBEKAH N COONEN LCPC, LAC
Counselor (Professional)
1930 9TH AVE
HELENA, MT 59601
Lewis And Clark County (406) 457-0000
DR. WILLIAM CHRISTOPHER SNIDER DO
Family Medicine
1930 9TH AVE
HELENA, MT 59601
Lewis And Clark County (406) 457-0000
DR. ZACHARY EDWARD DRAKE DMD
Dentist (General Practice)
1930 9TH AVE
HELENA, MT 59601
Lewis And Clark County (406) 533-5959
SHERRY WINCHELL RD, LN
Dietitian, Registered
1930 9TH AVE
HELENA, MT 59601
Lewis And Clark County (406) 457-8912
DR. CHRISTOPHER J HOLDHUSEN M.D.
Family Medicine
1930 9TH AVE
HELENA, MT 59601
Lewis And Clark County (406) 457-0000
DR. HEATHER MCREE DO
Neuromusculoskeletal Medicine & OMM
1930 9TH AVE
HELENA, MT 59601
Lewis And Clark County (406) 457-0000
MRS. MARY CATHERINE WENGER NP
Nurse Practitioner
1930 9TH AVE
HELENA, MT 59601
Lewis And Clark County (406) 457-0000
LAURA FUNK LCSW
Social Worker (Clinical)
1930 9TH AVE
HELENA, MT 59601
Lewis And Clark County (406) 457-0000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Holly Mook's NPI number?

The NPI number for Holly Mook is 1386977791. It was assigned to this individual provider in the NPPES registry on September 16, 2009.

Where is Holly Mook located?

Holly Mook practices at 1930 9th Ave, Helena, MT 59601. The listed phone number is (406) 457-0000.

What is Holly Mook's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Holly Mook enrolled in Medicare?

Yes. Holly Mook is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Holly Mook's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Holly Mook reassigns Medicare benefits to Pureview Health Center (Helena, MT). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Holly Mook's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Holly Mook accept?

Health plans from Blue Cross and Blue Shield of Montana and Mountain Health CO-OP list Holly Mook as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Holly Mook was last updated on May 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.