Gregory M. Sibenaller, DO
Student in an Organized Health Care Education/Training Program · Mason City, IA
Gregory M. Sibenaller, DO is a student in an organized health care education/training program with a practice address in Mason City, Iowa, and NPI 1184367724, issued on Apr 20, 2022. Check the license with the Iowa board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory M. Sibenaller
- Credential
- DO
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- 1010 4TH St SW Ste 305, Mason City, IA 50401
- Phone
- (641) 428-5700
- Enumerated
- Apr 20, 2022
- Record last updated
- Jul 14, 2025
- Fax
- (641) 428-2515
- Medicare enrollment
- Enrolled (PECOS I20251013003841); accepts Medicare assignment
- Medical or professional school
- West Virginia School Of Osteopathic Medicine, 2022
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 923 in Iowa → Look up another NPI →
Also registered at 1010 4TH St SW Ste 305
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kieran Allowitz, DOStudent in an Organized Health Care Education/Training Program1871438879
- Spencer Boster, DOStudent in an Organized Health Care Education/Training Program1639973332
- Luke Carlson, MDInternal Medicine Physician1457092165
- Celine Durgin, MDStudent in an Organized Health Care Education/Training Program1396488953
- Linda Floden, MDFamily Medicine Physician1467563452
- Matthew Hardee, D.O.Internal Medicine Physician1548408867
Verify Gregory M. Sibenaller in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Iowa board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% more Medicare Part D claims than the average student in an organized health care education/training program in 2024
259 Medicare Part D claims for 79 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Losartan Potassium24 claims
- Atorvastatin Calcium12 claims
- Ozempic12 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.
Bills Medicare through one group practice
- St Anthony Regional Hospital And Nursing HomeCarroll, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory M. Sibenaller among 923 student in an organized health care education/training program records in Iowa
Gregory M. Sibenaller, DO is one of 923 student in an organized health care education/training program records with a practice address in Iowa. 18% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 25% of them.
- NPI issued2022 · 25% of these records are older, 70% newer
- In a Medicare fileYes · 18% of these records are
- In the CMS Doctors and Clinicians fileYes · 4% of these records are
- Graduated2022 · median 2023 among the 40 with a school on file
- Record last updated2025 · 21% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
43 student in an organized health care education/training program records list a practice address in Mason City
They are 43 of the 866 NPPES records with a practice address in Mason City, and 923 student in an organized health care education/training program records in Iowa.
All 923 in Iowa → Every provider in Mason City → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Amber Alberts, MDMason City, IA 504011215671516
- Ignatius Alden, MDMason City, IA 504011285323535
- Kasey Clowe, M.D.Mason City, IA 504011548558711
- Celine Durgin, MDMason City, IA 504011396488953
- Cassey Jo FullerMason City, IA 504011396434718
- Cristen Hays, MDMason City, IA 504011700575297
- Stephen HenrichMason City, IA 504011396139135
- Jeffrey Leya, M.D.Mason City, IA 504011124479449
Common questions
What is Gregory M. Sibenaller, DO's NPI number?
Gregory M. Sibenaller, DO's National Provider Identifier (NPI) is 1184367724, issued on Apr 20, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Gregory M. Sibenaller, DO located?
The NPPES record lists a practice address at 1010 4TH St SW Ste 305, Mason City, IA, 50401. Phone: (641) 428-5700. Providers update this record themselves, so call before visiting.
How can I verify Gregory M. Sibenaller, DO's license?
Search the Iowa board that licenses this profession; the NPPES record confirms identity only.
How much does Gregory M. Sibenaller, DO prescribe under Medicare Part D?
In 2024, Gregory M. Sibenaller, DO had 259 Medicare Part D claims for 79 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. 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.