MACKINAC STRAITS HEALTH SYSTEM INC
NPI 1659536035
General Practice in Saint Ignace, MI
About Mackinac Straits Health System Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MACKINAC STRAITS HEALTH SYSTEM INC (NPI 1659536035), doing business as Mackinac Straits Hospital And Health Center, is a healthcare organization registered as a general practice in Saint Ignace, Michigan and active in the NPI registry since July 2008. The organization lists Sonja Sprague, Credentialing, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 4
Other Names 1
Other Identifiers 1
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mackinac Straits Health System Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
53Medicare enrollment records show 53 clinicians reassign Medicare billing to Mackinac Straits Health System Inc, which bills Medicare for the services they deliver. Of these, 12 practice at this address and 18 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 10
Nearest to this location (20)
See all 53Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Mackinac Straits Health System Inc's NPI number?
The NPI number for Mackinac Straits Health System Inc is 1659536035. It was assigned to this organization in the NPPES registry on July 24, 2008. The provider is doing business as Mackinac Straits Hospital and Health Center.
Where is Mackinac Straits Health System Inc located?
Mackinac Straits Health System Inc is located at 1140 N State St, Saint Ignace, MI 49781. The listed phone number is (906) 643-8585.
What is Mackinac Straits Health System Inc's specialty?
The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.
Is Mackinac Straits Health System Inc enrolled in Medicare?
Yes. Mackinac Straits Health System Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mackinac Straits Health System Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 53 clinicians in 10 Medicare specialties reassign their Medicare billing to Mackinac Straits Health System Inc. A 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 the clinician's services. The largest specialties are Emergency Medicine (11), Family Practice (11) and Nurse Practitioner (11). Of these, 12 practice at this address and 18 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Mackinac Straits Health System Inc accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Mackinac Straits Health System Inc 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 Mackinac Straits Health System Inc was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Mackinac Straits Health System Inc · NPI 1659536035
General Practice organization in Saint Ignace, Michigan. Organization record, active in the CMS NPPES registry since July 24, 2008.
## Identity
- **NPI:** 1659536035 (Entity type: Organization)
- **Enumerated:** July 24, 2008
- **Primary specialty:** General Practice · taxonomy 208D00000X
- **Also known as:** Mackinac Straits Hospital and Health Center (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Sonja Sprague, CREDENTIALING
## Practice location
- **Address:** 1140 N STATE ST, Saint Ignace, MI 49781-1048
- **Phone:** (906) 643-8585 · **Fax:** (906) 643-0373
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 53 clinicians in 10 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Emergency Medicine (11), Family Practice (11), Nurse Practitioner (11); 12 practice at this address and 18 within 10 miles; [full list](https://npiprofile.com/npi/1659536035/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 13, 2026
- **Other identifiers:** Other 700D90255 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1659536035) · Data from the CMS NPPES public registry.