NPIMap

Organization Active NPI

Yellowstone City-County Health Department

Doing business as RiverStone Health HCH

  • Federally Qualified Health Center (FQHC)
  • Billings, MT
National Provider Identifier
1528575685
Registry record updated Aug 12, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Federally Qualified Health Center (FQHC)Taxonomy code 261QF0400X
Legal business name
YELLOWSTONE CITY-COUNTY HEALTH DEPARTMENT
Doing business as
RiverStone Health HCH
Practice address
21 S 29TH St
Billings, MT 59101-4024
Phone
(406) 651-6560
NPI assigned
Jan 10, 2018
Last updated
Aug 12, 2026By the provider in NPPES
Organization subpart
Yes
Parent organization
YELLOWSTONE CITY COUNTY HEALTH DEPARTMENTAs reported in NPPES

NPPES NPI Registry

Updated by the provider on Aug 12, 2026

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

Authorized official

Name
Shanna Zier, CFO
Title
Authorized Official
Phone
(406) 651-6471

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Federally Qualified Health Center (FQHC) 261QF0400X NU Primary

Addresses

Primary practice location

21 S 29TH St
Billings, MT 59101-4024

Mailing address

2626 1St Ave S
Billings, MT 59101-4228

Other names 1

  • RiverStone Health HCH Doing business as

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20171019000749 MT Part A Provider - Federally Qualified Health Center (FQHC) 1456259159 1 other NPI on this enrollment
Practice locations: Billings, MT

NPI to CCN mapping 1

The Medicare certification numbers (CCNs) connected to NPI 1528575685. Details of each certification follow.

Federally qualified health center certification: CCN 271863

Legal name
YELLOWSTONE CITY-COUNTY HEALTH DEPT
Doing business as
RIVERSTONE HEALTH HCH
Certification status
Active
Provider type (POS)
Federally qualified health center
Participating since
Oct 16, 2017
Last certification
Oct 16, 2017
Ownership / control type
For profit – corporation
Organization structure
GovernmentNon-profit
Enrollment address
21 S 29TH St
Billings, MT 59101-4024

Other NPIs with the same Medicare PAC ID 8

NPIs whose Medicare enrollments share a PECOS associate control ID (the same enrolled entity).

Other NPIs on the same Medicare enrollment 1

NPIs listed together on one Medicare enrollment, typically parts of the same organization.

National Provider Directory

National Provider Directory
Part of
Yellowstone City County

Locations

21 S 29th St
Billings, MT 59101

2424 1st Ave N
Billings, MT 59101
Phone (406) 651-6560

2626 1st Ave S
Billings, MT 59101
Phone (406) 247-3350

2822 Minnesota Ave
Billings, MT 59101
Phone (406) 247-3200

2469 Main St
Worden, MT 59088
Phone (406) 967-2255

Ownership & related parties

All disclosed owners & managing parties 3

As disclosed on the Medicare enrollment (CMS All Owners files). Individuals include officers, directors and managing employees, who may not hold ownership.

NameRoleSinceShare
Yellowstone City-County Health Dept Organization, Billings, MT Non-profit 5% Or Greater Direct Ownership Interest Jan 1, 1974 100%
Shanna Zier Individual W-2 Managing EmployeeCfo Oct 1, 2023
Megan B Littlefield Individual W-2 Managing EmployeeMedical Director Sep 6, 2011

Owners & managing parties with NPI records 9

Owners and managing parties disclosed on this facility’s Medicare enrollment that are themselves Medicare-enrolled.

All facility ownership & control disclosures 6

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

FacilityTypeRoleSince
Riverstone HealthBillings, MT, CCN 277012 Home health agency 5% Or Greater Direct Ownership Interest (100%) Jan 1, 1974
Riverstone HealthBillings, MT, CCN 271502 Hospice 5% Or Greater Direct Ownership Interest (100%) Jan 1, 1998
Riverstone Health Worden ClinicWorden, MT, CCN 271832 Federally qualified health center 5% Or Greater Direct Ownership Interest (100%) Jan 1, 1974
Riverstone Health Joliet ClinicJoliet, MT, CCN 271833 Federally qualified health center 5% Or Greater Direct Ownership Interest (100%) Jan 1, 1974
Riverstone Health Bridger ClinicBridger, MT, CCN 271834 Federally qualified health center 5% Or Greater Direct Ownership Interest (100%) Jan 1, 1974
Riverstone Health ClinicBillings, MT, CCN 271801 Federally qualified health center 5% Or Greater Direct Ownership Interest (100%) Jan 1, 1974

Owned or controlled facilities with NPI records 6

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

Facilities with the same owner 6

Facilities that share an organizational owner with 5% or greater ownership or operational control.

Practitioners & affiliated clinicians

Practitioners 75

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

View all 75

NPI Registry JSON

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

{
    "created_epoch": "1515542400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1786492800000",
    "number": "1528575685",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2626 1ST AVE S",
            "city": "BILLINGS",
            "state": "MT",
            "postal_code": "591014228"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "21 S 29TH ST",
            "city": "BILLINGS",
            "state": "MT",
            "postal_code": "591014024",
            "telephone_number": "406-651-6560"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "YELLOWSTONE CITY-COUNTY HEALTH DEPARTMENT",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "YELLOWSTONE CITY COUNTY HEALTH DEPARTMENT",
        "enumeration_date": "2018-01-10",
        "last_updated": "2026-08-12",
        "certification_date": "2026-08-12",
        "status": "A",
        "authorized_official_last_name": "ZIER",
        "authorized_official_first_name": "SHANNA",
        "authorized_official_title_or_position": "AUTHORIZED OFFICIAL",
        "authorized_official_telephone_number": "406-651-6471",
        "authorized_official_credential": "CFO"
    },
    "taxonomies": [
        {
            "code": "261QF0400X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Federally Qualified Health Center (FQHC)",
            "state": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "RiverStone Health HCH",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Billings, MT

Sources for this page

Verify at the official NPI Registry.