If you’ve started researching male hair loss, you’ve encountered the Norwood scale — the standard classification system that dermatologists, hair transplant surgeons, and hair loss forums use to describe and discuss the progression of androgenetic alopecia.
Understanding your Norwood stage is one of the most useful things you can do early in your hair loss journey. It helps you benchmark where you are, understand the treatment options available at your stage, and track whether your treatments are working.
The Norwood scale (formally the Hamilton-Norwood scale) was developed by Dr James Hamilton in the 1950s and refined by Dr O’Tar Norwood in the 1970s. It classifies male pattern baldness into seven stages based on the pattern and extent of recession and thinning.
It remains the universal language of hair loss — your surgeon, dermatologist, and any specialist you see will use it to describe your condition.
A full hairline with no meaningful recession. Hair is dense from the front hairline through to the crown. This is the baseline from which all other stages are measured.
Treatment: No treatment required. If you’re genetically predisposed to hair loss, preventive use of finasteride is sometimes started here.
Slight symmetrical recession at the temples. From the front, the hairline appears to have moved back slightly, forming shallow triangular recession on each side. The hairline remains largely intact.
Treatment: Finasteride and/or minoxidil are effective at this stage, primarily as prevention to halt further progression.
The hairline has receded significantly at the temples, creating a pronounced M, U, or V shape. The recession is deep enough to be cosmetically noticeable. Stage III Vertex also involves thinning beginning at the crown.
This is typically the stage at which men first seek treatment.
Treatment: Finasteride and minoxidil are both effective. Hair transplants can address the temples if desired.
Pronounced temple recession combined with clear thinning or a bald patch at the crown (vertex). The two areas of loss are separated by a band of hair crossing the top of the scalp. Hair density is noticeably reduced across the entire top of the scalp.
Treatment: Finasteride and minoxidil should be started urgently if not already. Hair transplant is an option for suitable candidates.
The band of hair separating the temple recession from the crown thinning has become narrow and sparse. The two areas are beginning to merge. Loss across the top of the scalp is extensive.
Treatment: Medical therapy becomes less effective as a standalone approach. Hair transplant surgery is increasingly considered, though donor supply must be evaluated.
The temple and crown regions have merged into a continuous large bald area covering most of the top of the scalp. A horseshoe-shaped strip of hair remains, running from above the ears around the back.
Treatment: Surgery is the primary restorative option. Medical treatment can help preserve remaining hair.
The most severe form of male pattern baldness. Only a narrow horseshoe of hair remains, restricted to the sides and back of the head. This remaining hair is often finer and may continue to recede with age.
Treatment: Hair transplant remains possible with sufficient donor supply. Scalp micropigmentation is an alternative for a natural-looking buzzcut appearance.
| Stage | Medical Tx Effectiveness | Hair Transplant | Notes |
|---|---|---|---|
| I–II | Excellent for prevention | Rarely needed | Start early for best results |
| III | Good | Optional | Early intervention has highest impact |
| IV | Moderate | Yes, suitable | Finasteride essential alongside |
| V | Limited standalone | Yes, evaluate | Donor supply becomes critical |
| VI–VII | Maintenance only | Yes, with planning | Density restoration requires skilled planning |
One of the most powerful ways to assess whether your treatment is working is to track your Norwood stage over time. If you started finasteride at Stage III and two years later you’re still at Stage III — your treatment is working. If you’ve progressed to Stage IV despite treatment, you may need to review your protocol.
Track Hair’s AI analyses your overhead photos to estimate your current Norwood stage, giving you an objective data point at each milestone to compare against.
To assess your stage:
If you’re unsure between two stages, you’re likely in the range between them. The Norwood scale is a spectrum, not discrete categories.
Track your Norwood stage with AI. Download Track Hair and upload a photo for your first AI-powered hair assessment.
| *Related reading: How to Track Minoxidil Progress | Hair Loss Treatments by Stage* |