NPIMap

Organization Active NPI

Ma Critical Care Services, PC

  • Critical Care Medicine (Anesthesiology) Physician
  • Missoula, MT
National Provider Identifier
1114221983
Registry record updated Jul 20, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Critical Care Medicine (Anesthesiology) PhysicianTaxonomy code 207LC0200X
Legal business name
MA CRITICAL CARE SERVICES, PC
Practice address
500 W Broadway St
Missoula, MT 59802-4008
Phone
(406) 543-7271
NPI assigned
Jan 7, 2011
Organization subpart
Yes
Parent organization
MISSOULA ANESTHESIOLOGY, P.C.As reported in NPPES

NPPES NPI Registry

Updated by the provider on Jul 20, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name
Barb Gillett Bretz
Title
Cfo
Phone
(406) 544-2963

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Critical Care Medicine (Anesthesiology) PhysicianGroup: 193400000X SINGLE SPECIALTY GROUP 207LC0200X Primary

Addresses

Primary practice location

500 W Broadway St
Missoula, MT 59802-4008

Mailing address

PO Box 94484
Seattle, WA 98124-6784

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MT

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20110426000138 MT Part B Supplier - Clinic/Group Practice 8325223928 Receives reassigned benefits from 5 practitioners
Practice locations: Missoula, MT

National Provider Directory

National Provider Directory
Part of
Missoula Anesthesia PC

Member of 1

Organizations this organization is a member of, according to the National Provider Directory.

Ownership & related parties

Parent organization (reported in NPPES) 1

This organization reports itself as a subpart in NPPES; the parent’s legal name matches this organization in the same state.

Practitioners & affiliated clinicians

Practitioners 82

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

View all 82

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1294358400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1784505600000",
    "number": "1114221983",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 94484",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981246784"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "500 W BROADWAY ST",
            "city": "MISSOULA",
            "state": "MT",
            "postal_code": "598024008",
            "telephone_number": "406-543-7271"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MA CRITICAL CARE SERVICES, PC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "MISSOULA ANESTHESIOLOGY, P.C.",
        "enumeration_date": "2011-01-07",
        "last_updated": "2026-07-20",
        "certification_date": "2026-07-20",
        "status": "A",
        "authorized_official_last_name": "GILLETT BRETZ",
        "authorized_official_first_name": "BARB",
        "authorized_official_title_or_position": "CFO",
        "authorized_official_telephone_number": "406-544-2963"
    },
    "taxonomies": [
        {
            "code": "207LC0200X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Anesthesiology, Critical Care Medicine",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Missoula, MT

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 20, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.