GREGORY SIGLER MDCM, FRCSC
NPI 1437832938
Surgery - Surgical Oncology in Saginaw, MI
About Gregory Sigler Mdcm, Frcsc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY SIGLER MDCM, FRCSC (NPI 1437832938) is an individual surgical oncology provider in Saginaw, Michigan, licensed in Michigan (4301515602) and active in the NPI registry since August 2023. He is enrolled in Medicare PECOS and is a graduate of Mcgill University, Faculty Of Medicine (2018).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Gregory Sigler Mdcm, Frcsc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Gregory Sigler reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saginaw, MI 48602
- Reassigned Medicare billing, Michigan enrollment
- 194 clinicians in this Medicare group
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 48601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Gregory Sigler's NPI number?
The NPI number for Gregory Sigler is 1437832938. It was assigned to this individual provider in the NPPES registry on August 10, 2023.
Where is Gregory Sigler located?
Gregory Sigler practices at 912 S Washington Ave, Saginaw, MI 48601. The listed phone number is (989) 790-1001.
What is Gregory Sigler's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Surgical Oncology, with taxonomy code 2086X0206X.
Is Gregory Sigler enrolled in Medicare?
Yes. Gregory Sigler is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Gregory Sigler's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Sigler reassigns Medicare benefits to Saginaw Cooperative Hospitals, Inc (Saginaw, MI). 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 Gregory Sigler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Gregory Sigler was last updated on January 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Gregory Sigler, MDCM, FRCSC · NPI 1437832938
Surgical Oncology physician in Saginaw, Michigan. Individual provider, active in the CMS NPPES registry since August 10, 2023.
## Identity
- **NPI:** 1437832938 (Entity type: Individual)
- **Enumerated:** August 10, 2023
- **Primary specialty:** Surgery - Surgical Oncology · taxonomy 2086X0206X
- **State license:** 4301515602 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 912 S WASHINGTON AVE, Saginaw, MI 48601-2564
- **Phone:** (989) 790-1001
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Saginaw Cooperative Hospitals, Inc (NPI 1184711038, Saginaw, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Mcgill University, Faculty Of Medicine, class of 2018
## Record status
- **NPPES last updated:** January 14, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1437832938) · Data from the CMS NPPES public registry.