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HairmedicoBlog › Guides

The Norwood Scale —
All Stages Explained

Guides11 minUpdated April 2026
The Norwood Scale — All Hair Loss Stages Explained 2026

What is the Norwood scale?

The Norwood-Hamilton scale is the standard classification system for male pattern hair loss. Developed by Dr. O'Tar Norwood in 1975 (building on earlier work by Dr. Hamilton), it describes hair loss progression from Stage I (no significant loss) to Stage VII (extensive loss affecting most of the scalp).

Norwood Scale Hair Loss Stages — Hairmedico Istanbul
Hairmedico Istanbul — Post-operative scalp care and recovery protocol

The scale is the universal language of hair restoration. When a surgeon says "you're a Norwood IV," they mean a specific, internationally recognised pattern of loss — with predictable implications for graft count, candidacy and surgical planning.

All 7 Norwood stages explained

Stage I — No significant loss

The hairline is in the mature adult position with no significant recession. Not a surgical candidate. No intervention indicated — monitor for progression.

Stage II — Slight temporal recession

Minor recession at the temples. The hairline has retreated slightly but remains full. Medical management (minoxidil, finasteride) is the standard first intervention. Surgery is possible but typically not indicated at this stage.

Stage III — Deeper temporal recession

Defined temporal recession creating an M, U or V-shaped hairline. Stage III Vertex adds significant crown thinning. This is the most common stage at which patients seek their first consultation. Typically 1,500–2,500 grafts required for frontal restoration.

Stage IV — Hairline and crown both affected

Significant hairline recession and pronounced crown loss, separated by a bridge of hair. 2,500–3,500 grafts typical. Single-session treatment usually possible.

Stage V — Regions converging

The bridge of hair between frontal loss and crown loss narrows. Large combined area of thinning. 3,000–4,500 grafts typical. Some Stage V patients benefit from two sessions.

Stage VI — Large confluent area

Frontal and crown regions merge. Only a fringe at the sides and back remains. 4,000–5,500 grafts. Donor zone assessment is critical — capacity must be carefully planned.

Stage VII — Extensive loss

Only a narrow horseshoe-shaped band at the back and sides remains. The most challenging stage — donor supply is limited relative to the coverage area required. Staged procedures (2–3 sessions) are usually necessary. Conservative planning is essential.

Graft estimates by Norwood stage

StageArea affectedGrafts typically neededSessions
IIMinor temporal recession800–1,5001
IIIDeep recession, early crown1,500–2,5001
IVHairline + significant crown2,500–3,5001
VHairline and crown converging3,000–4,5001–2
VILarge confluent area4,000–5,5001–2
VIIExtensive — only sides remain5,000–6,500+2–3

How surgeons use the Norwood scale in surgical planning

The Norwood stage tells you where you are today. The more important question — the one that determines surgical planning — is where you will be at 45 or 55.

Hair transplant surgical procedure at Hairmedico Istanbul
Hairmedico Istanbul — Hair transplant surgical procedure at Hairmedico Istanbul

A 28-year-old at Norwood III may progress to Norwood VI by 45. If we design a hairline for a 28-year-old without accounting for this progression, the result at 45 will look unnatural — a transplanted frontal hairline surrounded by progressive loss behind it.

This is why Dr. Arslan includes a long-term progression assessment in every consultation. Family history, rate of current loss, donor zone characteristics and response to medical management all inform a 10–20 year projection. The hairline design and graft distribution plan reflect not just today's loss but the anticipated lifetime pattern.

A hairline designed only for today's patient will look wrong on tomorrow's patient. We design for a 55-year-old. If the result also looks good at 35, that's a bonus. — Dr. Arslan Musbeh

The Ludwig scale — female hair loss

The Norwood scale applies to male pattern hair loss. Female pattern hair loss (FPHL) uses the Ludwig scale:

Female candidates typically present at Ludwig I–II. Because the donor zone may also be affected by miniaturisation in FPHL, trichoscopic assessment of both areas is essential before confirming candidacy. Hair transplant for women →

Get your Norwood stage assessed

To receive a personal Norwood assessment from Dr. Arslan Musbeh — including long-term progression projection, graft estimate and technique recommendation — send 3 photographs (top, front, both sides) via WhatsApp or email. Response within 24 hours at no cost.

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Dr. Arslan Musbeh
Dr. Arslan Musbeh
Hair Transplant Surgeon · Founder, Hairmedico
FUE Europe Member · Ministry of Health Accredited · 17+ Years · 4,500+ Personal Cases
FUE Europe — Full Member 17+ Years · 4,500+ Cases
April 2026 Published April 17, 2026 Last updated Dr. Arslan Musbeh Medical review ~10 min Reading time
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Frequently Asked Questions

What is the Norwood scale?

The Norwood scale (Hamilton-Norwood classification) grades male pattern baldness from Stage I (minimal recession) to Stage VII (most extensive loss with only a rim of hair remaining). It is the universal clinical reference for hair transplant planning.

How many grafts do I need for my Norwood stage?

Norwood II–III: 800–2,500 grafts. Norwood IV: 2,500–3,500 grafts. Norwood V: 3,000–4,500 grafts. Norwood VI–VII: 4,500–7,000+ grafts (typically two sessions). Individual variation is significant — trichoscopy assessment at consultation provides the precise figure.

At what Norwood stage should I get a hair transplant?

Norwood III is widely considered the optimal stage — hair loss is established enough to plan confidently, donor supply is typically at maximum, and a single session can produce excellent results. Earlier stages benefit from medical management first; later stages may require two sessions.

Can Norwood VII patients have a hair transplant?

Yes, though typically requiring two sessions and realistic expectations about achievable density. Body hair transplant (beard, chest) can supplement limited scalp donor supply at Norwood VII. Dr. Arslan provides an honest assessment at consultation.

References & Sources
  1. Norwood OT. Male pattern baldness: classification and incidence. Southern Medical Journal. 1975. https://doi.org/10.1097/00007611-197511000-00009
  2. Hamilton JB. Patterned loss of hair in man: types and incidence. Annals of the New York Academy of Sciences. 1951. https://doi.org/10.1111/j.1749-6632.1951.tb27729.x
  3. Sinclair R. Male pattern androgenetic alopecia. BMJ. 1998. https://doi.org/10.1136/bmj.317.7162.865
  4. Cranwell W, Sinclair R. Male Androgenetic Alopecia. Endotext — NCBI Bookshelf. 2023. https://www.ncbi.nlm.nih.gov/books/NBK278957/
  5. Piraccini BM, Alessandrini A. Androgenetic alopecia. Giornale Italiano di Dermatologia e Venereologia. 2014. https://pubmed.ncbi.nlm.nih.gov/24566575/
  6. Gupta AK et al. Minoxidil: a comprehensive review. Journal of Dermatological Treatment. 2022. https://doi.org/10.1080/09546634.2020.1807246

All references are peer-reviewed medical literature or official health authority publications. No commercial sources included.

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