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

John Dana Mannion, MD

Individual provider Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · NPI 1780685677

John Dana Mannion, MD is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Dover, Delaware. Licensed in Delaware. Registered with an NPI since 2005.

Licensed in
DE
In the registry since
2005
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

540 S Governors Ave Ste 101A
Dover, DE 19904-3530
Phone: (302) 744-7980
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (primary) Taxonomy 208G00000X · Licence C1-0007255 (DE)

Record details

NPI number1780685677
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 2, 2005
Last updated in NPPESJuly 13, 2026
Mailing address704 Green Winged Trl, Camden Wyoming, DE 19934-9530

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