Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Gregory Grimberg, MD

Individual provider Surgery Physician · NPI 1104245307

Dr. Gregory Grimberg, MD is a General Surgery in Mason City, Iowa. Graduated from State University of New York Downstate Medical Center in 2014, 12 years ago. Practices with North Iowa Mercy Clinics, a 300-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Iowa and Maryland.

Years since qualifying
12
Trained at
State University of New York Downstate Medical Center
Licensed in
IA, MD
In the registry since
2014
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

250 S Crescent Dr
Mason City, IA 50401-2926
Phone: (641) 494-5300
Fax: (641) 494-5321
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4940 Eastern Ave Rm 3933d, Baltimore, MD 21224-2735 — (410) 550-6875

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence MD-47527 (IA)
Surgery Physician Taxonomy 208600000X · Licence D86982 (MD)

Record details

NPI number1104245307
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 15, 2014
Last updated in NPPESAugust 28, 2020
Certification dateAugust 28, 2020
Mailing address250 S Crescent Dr, Mason City, IA 50401-2926

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGENERAL SURGERY
Medical schoolSTATE UNIVERSITY OF NEW YORK DOWNSTATE MEDICAL CENTER
Graduated 2014 (12 years in practice)
Group practice North Iowa Mercy Clinics — 300 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

Other providers in Mason City