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

Denisa Hagau, MD

Individual provider Cardiovascular Disease Physician · NPI 1861703910

Denisa Hagau, MD is a Cardiovascular Disease (Cardiology) in Mason City, Iowa. Qualified in 2006, 20 years ago. Practices with North Iowa Mercy Clinics, a 300-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Florida, Iowa and Rhode Island.

Years since qualifying
20
Licensed in
FL, IA, RI
In the registry since
2010
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

250 S Crescent Dr
Mason City, IA 50401-2926
Phone: (641) 494-5300
Fax: (641) 494-5321
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 403 1st St Se, Belmond, IA 50421-1201 — (844) 474-4321
  • 1316 S Main St, Clarion, IA 50525-2019 — (844) 474-4321

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence MD-43219 (IA)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence ME167219 (FL)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 43219 (IA)
Internal Medicine Physician Taxonomy 207R00000X · Licence LP01915 (RI)

Record details

NPI number1861703910
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 23, 2010
Last updated in NPPESJune 16, 2026
Certification dateJune 16, 2026

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolOTHER
Graduated 2006 (20 years in practice)
Group practice North Iowa Mercy Clinics — 300 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations9 on file with Medicare

Other providers in Mason City