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GREGORY SIGLER MDCM, FRCSC
NPI 1437832938
Surgery - Surgical Oncology in Saginaw, MI

Active since August 10, 2023PECOS Enrolled
912 S WASHINGTON AVE, SAGINAW, MI 48601(989) 790-1001 Get Directions Write a Review

NPPES record last updated: January 14, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jan 14, 2026, Aug 18, 2023, Aug 10, 2023 (3 updates tracked since 2023).

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

NPI1437832938
Entity TypeIndividualMale
Primary Taxonomy2086X0206X
Provider Legal NameGREGORY SIGLERCredential: MDCM, FRCSC
Location Address912 S WASHINGTON AVESaginaw, MI 48601-2564
Mailing Address1000 Houghton AveSaginaw, MI 48602-5303 · (989) 746-7500
Phone(989) 790-1001
Sole ProprietorNo
Medical School CMSMcgill University, Faculty Of MedicineGraduated 2018
Enumeration DateAugust 10, 2023
Last NPPES UpdateJanuary 14, 20263 updates tracked since enumeration
NPPES CertifiedJanuary 14, 2026
✔ NPI 1437832938 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgery · Surgical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2086X0206X
License✔ Licensed in MI · 4301515602
Definition
A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research.
912 S WASHINGTON AVE, Saginaw, MI 48601
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gregory Sigler Mdcm, Frcsc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2264895788
PECOS Enrollment IDI20251029000755
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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.

New Patient
$166.68 typical visit price
range $54.34 – $166.68
Typical copayment $41.67 (range $13.58 – $41.67)
Most-billed visit code 99205
Established Patient
$68.07 typical visit price
range $17.09 – $135.40
Typical copayment $17.01 (range $4.27 – $33.85)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 18

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARCUS S BREIDINGER PA
Physician Assistant (Medical)
912 S WASHINGTON AVE, SUITE 1
SAGINAW, MI 48601
Saginaw County (989) 790-1001
DR. FAIZ TUMA M.D.
Surgery
912 S WASHINGTON AVE
SAGINAW, MI 48601
Saginaw County (989) 583-6800
MIDMICHIGAN GERIATRICS PLC
Internal Medicine
912 S WASHINGTON AVE, SUITE B
SAGINAW, MI 48601
Saginaw County (989) 791-4100
DR. VASANTH STALIN M.D.
Surgery
912 S WASHINGTON AVE, STE. 1
SAGINAW, MI 48601
Saginaw County (989) 790-1001
DR. AYESHA KHAN M.D.
Internal Medicine
912 S WASHINGTON AVE
SAGINAW, MI 48601
Saginaw County (989) 791-7900
JOHN BLEBEA MD
Surgery (Vascular Surgery)
912 S WASHINGTON AVE
SAGINAW, MI 48601
Saginaw County (918) 744-3523
JENNIFER NAJAWICZ
Nurse Practitioner (Adult Health)
912 S WASHINGTON AVE
SAGINAW, MI 48601
Saginaw County (989) 791-4100
DR. OLUWAYEMISI O OYELEKE MD
Surgery
912 S WASHINGTON AVE
SAGINAW, MI 48601
Saginaw County (086) 746-7857

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.

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 6 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.