The Norwood scale is the universal reference used to describe the stages of Male Pattern Baldness (MPB).

It will be useful if you are speaking to a doctor on the phone when they ask for an accurate description of your hair loss.

Norwood Scale

Class 2 MPB: Experiencing the beginnings of frontal temporal hair erosion that may become quite severe in 5-10 years. Hair Transplantation is usually indicated. In consultation, a good doctor will determine whether or not you are a candidate for hairline Micrografts. They will take into account your age, family history, amount of hair loss, type and texture of hair, and amount and quality of donor hair available in developing their prognosis and treatment plan.

Class 3 MPB: Experiencing accelerating hair loss that often becomes severe in 5-7 years. Hair Transplantation is usually indicated. The doctor will determine whether or not you are a candidate for hair restoration procedures.

Class 4 MPB: Experiencing substantial frontal temporal recession and, often, an enlarging “bald spot” toward the back of the head. Some men choose natural, permanent Hair Transplantation. In consultation your doctor will determine whether or not you are a candidate for hair restoration procedures.

Class 5 MPB: Experiencing very severe frontal temporal recession and, often, an enlarging “bald spot” toward the back of the head. Some men choose natural, permanent Hair Transplantation. In consultation your doctor will determine whether or not you are a candidate for hair restoration procedures.

Class 6 MPB: Experiencing very severe frontal temporal recession and an extremely large “bald spot” toward the back of the head. Some men choose natural, permanent Hair Transplantation. In consultation your doctor will determine whether or not you are a candidate.

Class 7 MPB: May be candidates for a partial transplantation procedure. With a limited donor site usually only the hairline can be recreated leaving the crown area bald.