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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

JOHN DANA MANNION M.D.
NPI 1780685677
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Dover, DE

Active since August 02, 2005
540 S GOVERNORS AVE, SUITE 101A, DOVER, DE 19904(302) 744-7980 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About John Dana Mannion M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN DANA MANNION M.D. (NPI 1780685677) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Dover, Delaware, licensed in Delaware (C1-0007255) and active in the NPI registry since August 2005.

NPPES Registry Identity

NPI1780685677
Entity TypeIndividualMale
Primary Taxonomy208G00000X
Provider Legal NameJOHN DANA MANNIONCredential: M.D.
Location Address540 S GOVERNORS AVE, SUITE 101ADover, DE 19904-3530
Mailing Address704 Green Winged TrlCamden Wyoming, DE 19934-9530 · (302) 697-1377
Phone(302) 744-7980
Sole ProprietorNo
Enumeration DateAugust 2, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1780685677 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyThoracic Surgery (Cardiothoracic Vascular Surgery)Allopathic & Osteopathic Physicians
Taxonomy Code208G00000X
License✔ Licensed in DE · C1-0007255
Definition
A thoracic surgeon provides the operative, perioperative and critical care of patients with pathologic conditions within the chest. Included is the surgical care of coronary artery disease, cancers of the lung, esophagus and chest wall, abnormalities of the trachea, abnormalities of the great vessels and heart valves, congenital anomalies, tumors of the mediastinum and diseases of the diaphragm. The management of the airway and injuries of the chest is within the scope of the specialty.
540 S GOVERNORS AVE, Dover, DE 19904
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Other Identifiers 1

Medicaid1000032313DE

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JENNIFER CROUSE M.S., CCC-SLP
Speech-Language Pathologist
540 S GOVERNORS AVE
DOVER, DE 19904
Kent County (302) 744-7095
BAYHEALTH NEUROSURGERY
Nurse Practitioner (Adult Health)
540 S GOVERNORS AVE, SUITE 100
DOVER, DE 19904
Kent County (302) 526-1470
JONATHAN L KATES MD
Orthopaedic Surgery
540 S GOVERNORS AVE, SUITE 201
DOVER, DE 19904
Kent County (302) 730-4366
JOHN L SULLIVAN PAC
Physician Assistant
540 S GOVERNORS AVE, SUITE 101A
DOVER, DE 19904
Kent County (302) 744-7980
BAYHEALTH MEDICAL CENTER, INC
Thoracic Surgery (Cardiothoracic Vascular Surgery)
540 S GOVERNORS AVE
DOVER, DE 19904
Kent County (302) 744-7980
CATHERINE J KOTALIK PA
Physician Assistant
540 S GOVERNORS AVE, SUITE 100
DOVER, DE 19904
Kent County (302) 526-1470
MR. ROBERT CHARLES REINERT III PA-C
Physician Assistant (Surgical)
540 S GOVERNORS AVE, SUITE 201
DOVER, DE 19904
Kent County (302) 730-4366
MRS. CYNTHIA L MARTIN NP
Nurse Practitioner
540 S GOVERNORS AVE, STE 100
DOVER, DE 19904
Kent County (302) 744-7994

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Mannion's NPI number?

The NPI number for John Mannion is 1780685677. It was assigned to this individual provider in the NPPES registry on August 2, 2005.

Where is John Mannion located?

John Mannion practices at 540 S Governors Ave Suite 101A, Dover, DE 19904. The listed phone number is (302) 744-7980.

What is John Mannion's specialty?

The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.

When was this NPI record last updated?

The NPPES record for John Mannion was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.