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Hair Loss in Men

Norwood Classification

The Norwood system of classification, published in 1975 by Dr. O’tar Norwood, is the most widely used classification for hair loss in men. It defines two major patterns and several less common types. In the regular Norwood pattern, two areas of hair loss gradually enlarge to produce recession at the temples and thinning in the crown. These regions coalesce until the entire front, top and crown (vertex) of the scalp are bald.

Click “View Photos” to view examples of patients from that Norwood Class.

Class Description Image
Class I Represents an adolescent or juvenile hairline and is not actually balding. The adolescent hairline generally rests on the upper brow crease.
Class II Indicates a progression to the adult or mature hairline that sits a finger’s breath (1.5cm) above the upper brow crease, with some temporal recession. This also does not represent balding.
Class III The earliest stage of male hair loss. It is characterized by a deepening temporal recession. View Photos
Class III Vertex Represents early hair loss in the crown (vertex). View Photos
Class IV Characterized by further frontal hair loss and enlargement of vertex, but there is still a solid band of hair across the top (mid-scalp) separating front and vertex. View Photos
Class V The bald areas in the front and crown continue to enlarge and the bridge of hair separating the two areas begins to break down. View Photos
Class VI Occurs when the connecting bridge of hair disappears leaving a single large bald area on the front and top of the scalp. The hair on the sides of the scalp remains relatively high. View Photos
Class VII Patients have extensive hair loss with only a wreath of hair remaining in the back and sides of the scalp. View Photos

Browse Before & After Photos by Norwood Class

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Updated: 2018-05-24 | Published: 2009-07-28