MASI (Melasma Area and Severity Index)
MASI (Melasma Area and Severity Index) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
Open the MASI (Melasma Area and Severity Index) → Runs in your browser. No signup, no tracking.
What this is
MASI (Melasma Area and Severity Index) is one of 230 deterministic tools in Sophie Well's Clinical Scoring & Risk group. MASI (Melasma Area and Severity Index) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Kimbrough-Green CK, Griffiths CE, Finkel LJ, et al. Topical retinoic acid (tretinoin) for melasma in black patients. Arch Dermatol. 1994;130(6):727-733. (MASI; validation Pandya AG, et al. J Am Acad Dermatol. 2011;64(1):78-83.) Read the source ↗
Worked example: Melasma Area and Severity Index 10.6 of 48 — higher = more severe.
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