NPIMap

Organization Active NPI

Mackinac Straits Health System Inc

Doing business as Rivertown Medical Clinic

  • Rural Health Clinic/Center
  • Cheboygan, MI
National Provider Identifier
1659868206
Registry record updated Jun 9, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Rural Health Clinic/CenterTaxonomy code 261QR1300X
Legal business name
MACKINAC STRAITS HEALTH SYSTEM INC
Doing business as
Rivertown Medical Clinic
Practice address
920 S Huron St
Cheboygan, MI 49721-2267
Phone
(231) 597-8192
Fax
(231) 597-8463
NPI assigned
Apr 19, 2018
Last updated
Jun 9, 2026By the provider in NPPES
Organization subpart
Yes
Parent organization
MACKINAC STRAITS HEALTH SYSTEM INCAs reported in NPPES

NPPES NPI Registry

Updated by the provider on Jun 9, 2026

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

Authorized official

Name
Sonja Sprague
Title
Credentialing
Phone
(906) 643-0451

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Rural Health Clinic/Center 261QR1300X Primary
Family Medicine Physician 207Q00000X

Addresses

Primary practice location

920 S Huron St
Cheboygan, MI 49721-2267

Mailing address

1140 N State St
Saint Ignace, MI 49781-1013

Other identifiers 1

IdentifierTypeStateIssuer
238716OtherMEDICARE

Other names 1

  • Rivertown Medical Clinic Doing business as

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MI2 enrollments

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
O20080527000172 MI Part A Provider - Critical Access Hospital 1456420876 Receives reassigned benefits from 62 practitioners
1 other NPI on this enrollment
This NPI is an additional NPI on the enrollment
Practice locations: Mackinac Island, MI; Mackinaw City, MI; Point Aux Pin, MI; Saint Ignace, MI; Cheboygan, MI
O20181004002034 MI Part A Provider - Rural Health Clinic 1456420876 Practice locations: Cheboygan, MI

NPI to CCN mapping 2

The Medicare certification numbers (CCNs) connected to NPI 1659868206. Details of each certification follow.

Hospital certification: CCN 231306

Legal name
MACKINAC STRAITS HEALTH SYSTEM INC
Doing business as
MACKINAC STRAITS HOSPITAL AND HEALTH CENTER
Certification status
Active
Provider type (POS)
Hospital – Critical access hospital
Participating since
Apr 26, 2000
Last certification
May 15, 2012
Beds
15
Ownership / control type
Private (not for profit)
Organization structure
CorporationNon-profit
Enrollment address
1140 N State St
Saint Ignace, MI 49781-1048
Other Hospital Practice Location

Rural health clinic certification: CCN 238716

Legal name
MACKINAC STRAITS HEALTH SYSTEM INC
Doing business as
RIVERTOWN MEDICAL CLINIC
Certification status
Active
Provider type (POS)
Rural health clinic
Participating since
May 3, 2019
Last certification
May 3, 2019
Ownership / control type
2B
Organization structure
CorporationNon-profit
Enrollment address
920 S Huron St
Cheboygan, MI 49721-2267
Related CCNs
231306

Facilities connected through Provider of Services related, parent or unit certification numbers.

Other NPIs with the same Medicare PAC ID 6

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.

Care Compare: Hospital

Medicare Care Compare
Listed as
Mackinac Straits Hospital and Health CenterCCN 231306 · All quality measures
Type
Critical Access Hospitals
Ownership
Voluntary non-profit - Private
Medicare certification status
ActiveFrom the Provider of Services file
Emergency services
Yes

Laboratory certificates & supplier records

Derived by NPIMap

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

CLIA numberLaboratoryCertificateExpires
23D1030472Rivertown Medical Clinic920 S Huron Street, Cheboygan, MI 49721Certificate of waiverMay 14, 2027

National Provider Directory

National Provider Directory
Tax ID family
Mackinac Straits Health System12 organizations share this tax ID, including this one
Part of
Mackinac Straits Health System

Other organizations with this tax ID 11

Organizations that report the same tax identification number in the National Provider Directory.

Member organizations 1

Organizations listed as members of this organization in the National Provider Directory.

Locations

920 S Huron St
Cheboygan, MI 49721
Phone (231) 597-8192

450 S Nicolet St
Mackinaw City, MI 49701
Phone (231) 436-5535

1140 N State St
Bldg 2
Saint Ignace, MI 49781
Phone 9066430400 ext. 30834

Ownership & related parties

All disclosed owners & managing parties 18

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

NameRoleSinceShare
Susan H Strich Individual Corporate DirectorPost Chief of Staff Jun 1, 2018
Corporate DirectorChief of Staff Jun 1, 2018
Jason C Anderson Individual Corporate DirectorCfo Jun 6, 2008
W-2 Managing EmployeeCfo Jun 6, 2008
Corporate OfficerCfo May 1, 1993
Patrick Shannon Individual Corporate DirectorBoard Vice Chair Feb 1, 2007
Prentiss M Brown Individual Corporate DirectorBoard Member Feb 12, 2013
Robert M Currier Individual Corporate DirectorChief of Staff Jan 1, 2024
Operational/Managerial ControlVice Chief of Staff Jan 1, 2024
Kevin McElroy Individual Corporate DirectorChief Human Resources & Support Jan 2, 2013
Corporate OfficerChief Human Resources & Support Jan 2, 2013
James North Individual Corporate DirectorBoard Member Feb 12, 2013
John D Moffat Individual Corporate DirectorVice Chief of Staff Feb 20, 2025
Deborah S Lull Individual Operational/Managerial ControlChief Nursing Officer Jan 1, 2024
Keith Massaway Individual Corporate DirectorBoard Member May 14, 2015
Steven Autore Individual Corporate DirectorBoard Jun 6, 2008
Corporate DirectorChair Feb 1, 2007
Mark Elmblad Individual Corporate DirectorBoard Member May 14, 2015
Karen Cheeseman Individual Corporate DirectorPresident & Ceo Jul 1, 2017
W-2 Managing EmployeePresident & Ceo Jul 1, 2017
Corporate OfficerPresident & Ceo Jul 13, 2017
Corporate DirectorPresident & Ceo Jul 13, 2017
Margaret Doud Individual Corporate DirectorBoard Treasurer Jun 6, 2008
Corporate DirectorBoard Member Sep 20, 2006
Jodie Becker Individual Operational/Managerial ControlChief Ambulatory Officer Jan 1, 2024
Richard Smith Individual Corporate DirectorBoard Member Jun 6, 2008
Corporate DirectorBoard Member Oct 2, 2006
Chrsitine McPherson Individual Operational/Managerial ControlBoard Member Feb 12, 2013
Loretta M Leja Individual Corporate DirectorPost Chief of Staff Jun 1, 2018

Owners & managing parties with NPI records 4

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

All facility ownership & control disclosures 1

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

FacilityTypeRoleSince
Evergreen Living CenterSaint Ignace, MI, CCN 235041 Skilled nursing facility 5% Or Greater Direct Ownership Interest (100%)
Operational/Managerial Control
Adp of the SNF
Direct Ownership Interest (100%)		 Jan 1, 1967
Jan 1, 1967
Jul 5, 2008
Jan 1, 1967

Owned or controlled facilities with NPI records 1

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

  • Mackinac Straits Health System Inc

    dba Mackinac Straits Hospital

    • Skilled Nursing Facility
    • Saint Ignace, MI
    • NPI 1902061385

    5% Or Greater Direct Ownership Interest, Adp of the SNF, Direct Ownership Interest, Operational/Managerial Control

    CMS ownership

Practitioners & affiliated clinicians

Practitioners 53

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 53

Affiliated clinicians 91

Clinicians who list this facility as an affiliation in Medicare Care Compare.

View all 91

NPI Registry JSON

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

{
    "created_epoch": "1524096000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1780963200000",
    "number": "1659868206",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1140 N STATE ST",
            "city": "SAINT IGNACE",
            "state": "MI",
            "postal_code": "497811013"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "920 S HURON ST",
            "city": "CHEBOYGAN",
            "state": "MI",
            "postal_code": "497212267",
            "telephone_number": "231-597-8192",
            "fax_number": "231-597-8463"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MACKINAC STRAITS HEALTH SYSTEM INC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "MACKINAC STRAITS HEALTH SYSTEM INC",
        "enumeration_date": "2018-04-19",
        "last_updated": "2026-06-09",
        "certification_date": "2026-06-09",
        "status": "A",
        "authorized_official_last_name": "SPRAGUE",
        "authorized_official_first_name": "SONJA",
        "authorized_official_title_or_position": "CREDENTIALING",
        "authorized_official_telephone_number": "906-643-0451"
    },
    "taxonomies": [
        {
            "code": "261QR1300X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Rural Health",
            "state": null,
            "license": null,
            "primary": true
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICARE",
            "identifier": "238716",
            "state": null
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Rivertown Medical Clinic",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "Rivertown Medical Clinic",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Cheboygan, MI

Sources for this page

Verify at the official NPI Registry.