Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Serena M. Day, MD

Individual provider Cardiovascular Disease Physician · NPI 1669715348

Serena M. Day, MD is registered under Cardiovascular Disease (Cardiology) in Mansfield, Ohio. Graduated from Drexel University College of Medicine in 2013, 13 years ago. Practices with Ohiohealth Corporation, a 2,289-clinician group and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
13
Trained at
Drexel University College of Medicine
Licensed in
OH
In the registry since
2013
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

335 Glessner Ave
Mansfield, OH 44903-2269
Phone: (567) 241-7000
Fax: (567) 241-7523
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 35.128923 (OH)

Record details

NPI number1669715348
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 1, 2013
Last updated in NPPESJanuary 3, 2022
Certification dateJanuary 3, 2022

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolDREXEL UNIVERSITY COLLEGE OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice Ohiohealth Corporation — 2289 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,182
Services billed 1,968 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Avita Ontario Hospital · Ontario, OH · listed as Avita Ontario Hospital
  • Mercy Health - Willard Hospital Hospital · Willard, OH · listed as Mercy Health - Willard Hospital LLC
  • Ohiohealth Mansfield Hospital Hospital · Mansfield, OH
  • Ohiohealth Shelby Hospital Hospital · Shelby, OH
  • University Hospitals Samaritan Medical Center Hospital · Ashland, OH

Colleagues at Ohiohealth Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2289 clinicians in the practice; 12 are shown here.

Other providers in Mansfield