Gregory Sigler, MDCM, FRCSC
Surgical Oncology Physician · Saginaw, MI
Gregory Sigler, MDCM, FRCSC is a surgical oncology physician with a practice address in Saginaw, Michigan, and NPI 1437832938, issued on Aug 10, 2023. Check the license (Michigan 4301515602, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Gregory Sigler
- Credential
- MDCM, FRCSC
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License number
- 4301515602 MI
Self-reported in NPPES; status is on the state search - Practice location
- 912 S Washington Ave, Saginaw, MI 48601
- Phone
- (989) 790-1001
- Enumerated
- Aug 10, 2023
- Record last updated
- Jan 14, 2026
- Medicare enrollment
- Enrolled (PECOS I20251029000755); may accept Medicare assignment
- Medical or professional school
- Mcgill University, Faculty Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 33 in Michigan → Look up another NPI →
Also registered at 912 S Washington Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Blebea, MDVascular Surgery Physician1386632313
- Marcus Breidinger, PAMedical Physician Assistant1033462635
- Renee Cholyway, M.D.Colon & Rectal Surgery Physician1639604614
- Kareem Ibraheem, MBBCHSurgical Critical Care Physician1861996241
- Ayesha Khan, M.D.Internal Medicine Physician1275583882
- Laurie Meyer, NPNurse Practitioner1881826071
Verify Gregory Sigler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301515602Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average surgical oncology physician in 2024
26 Medicare Part D claims for 22 beneficiaries, against an average of 87 among the 1,237 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 17 claims were for opioids.
Most prescribed
- Oxycodone Hcl11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,698.30
10 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 1,132 providers of this specialty with any payment received $4,224.74 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Gregory Sigler among 33 surgical oncology physician records in Michigan
Gregory Sigler, MDCM, FRCSC is one of 33 surgical oncology physician records with a practice address in Michigan. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 97% of them.
- NPI issued2023 · 97% of these records are older, 0% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 85% of these records are
- Graduated2018 · median 2007 among the 28 with a school on file
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in Michigan
There are 33 surgical oncology physician records in Michigan.
All 33 in Michigan → Every provider in Saginaw → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- Elizabeth Paulus, M.D.Saginaw, MI 486011962632349
- Joseph Contino, MDSaginaw, MI 486041356384499
- Douglas Iddings, DOFlint, MI 485031023233384
- Srinivas Kavuturu, M.D.East Lansing, MI 488231932366309
- Tong Qu, MDEast Lansing, MI 488231598119372
- Hiromichi Ito, M.D.Lansing, MI 489121588735674
- John Barnwell, M.D.Detroit, MI 482351831105550
- Sarwat Ahmad, MDGrosse Pointe, MI 482301639464829
Common questions
What is Gregory Sigler, MDCM, FRCSC's NPI number?
Gregory Sigler, MDCM, FRCSC's National Provider Identifier (NPI) is 1437832938, issued on Aug 10, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Sigler, MDCM, FRCSC located?
The NPPES record lists a practice address at 912 S Washington Ave, Saginaw, MI, 48601. Phone: (989) 790-1001. Providers update this record themselves, so call before visiting.
How can I verify Gregory Sigler, MDCM, FRCSC's license?
NPPES lists Michigan license number 4301515602, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Sigler, MDCM, FRCSC prescribe under Medicare Part D?
In 2024, Gregory Sigler, MDCM, FRCSC had 26 Medicare Part D claims for 22 beneficiaries; the average among surgical oncology physician prescribers was 87. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.