Guerline Sinsmyr, MD practises Internal Medicine in Creston, Iowa. Qualified in 2013, 13 years ago. Practices with Greater Regional Medical Center, a 48-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Iowa.
Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.
From the CMS Doctors & Clinicians file — this clinician is
enrolled in Medicare.
Medicare specialty
INTERNAL MEDICINE
Medical school
OTHER
Graduated
2013 (13 years in practice)
Group practice
Greater Regional Medical Center — 48 clinicians
Accepts Medicare assignment
Yes — accepts the Medicare-approved amount
Practice locations
2 on file with Medicare
Payments from drug and device companies, 2025
Drug and device makers are required by federal law (the Physician Payments
Sunshine Act) to report what they pay or give to clinicians, and CMS
publishes the reports as Open Payments. This is the 2025 program
year. A report is a record of a payment, not an allegation of anything,
and many are small items such as meals. Only general payments are listed
here; research payments and ownership or investment interests are
reported separately by CMS and are not shown.
Food and Beverage
$29 2 payments · a meal or drink at a meeting or visit, not a fee
Each amount is the sum of what companies reported for that kind of
payment in 2025, rounded to the dollar. Not all of it is income to
the clinician: a meal is not a fee, a charitable contribution goes to a
charity, and a royalty or an acquisition payment is not a salary.
Check a report, or dispute one, at the source in CMS’s own tool,
Open Payments.
Corrections go through CMS’s dispute process. This site removes a
home address on request and asks for no proof, because that is privacy;
it will not remove an accurate payment report on request, because that is
a statutory public disclosure.
Practises at
Facilities the CMS Facility Affiliation file lists for this clinician.
Those with a page here are linked.