He was 85 and lived in Towson.
The son of a Baltimore & Ohio Railroad mechanical engineer and a homemaker, Mr. Cardegna was born in Baltimore and raised in the 900 block of Eastern Ave. in Little Italy.
He was a 1943 graduate of Loyola High School and earned his bachelor's degree in 1947 from Georgetown University.
A licensed certified public accountant, Mr. Cardegna was a founding partner of Handwerger, Cardegna, Funkhouser and Lurman, a Towson accounting firm, nearly 60 years ago.
In addition to his private accounting practice, Mr. Cardegna taught auditing and taxation and was dean of the accounting department at the University of Baltimore for than 30 years, until retiring in 1991.
"In my opinion, Tommy Cardegna was an intellect who had an insatiable appetite for acquiring and gathering information quickly," said former Mayor Thomas J. D'Alesandro III, a cousin.
Mr. Cardegna had been chairman of the Maryland Accounting Board and had served as chairman of the Accounting Board of the United States.
"He loved to travel and especially to Italy where I had family," said his wife of 53 years, the former Mary D'Adamo.
Mr. Cardegna was a longtime communicant and financial adviser to St. Leo Roman Catholic Church in Little Italy, where a Mass of Christian burial was offered Aug. 22.
In addition to his wife and cousin, Mr. Cardegna is survived by two nieces.