BMI Is a Starting Point. Your Health Deserves a Fuller Picture.

A number can organize a medical chart. It cannot tell the whole story of the person sitting in front of it. BMI is a useful example: easy to calculate, familiar and relevant to many treatment decisions, yet incomplete as an individual health assessment.

What the number measures

Body mass index relates weight to height. It does not separate fat from muscle or bone, or tell us where fat is carried. The CDC describes BMI as a screening measure that belongs alongside medical history, physical examination and other findings. [1]

Two people with the same BMI can therefore need different conversations. One may need a closer look at blood pressure or glucose; another may need attention to strength, symptoms or changes over time. Asking those questions adds information that a height-and-weight calculation cannot supply.

A broader approach to diagnosis

A 2025 international commission proposed assessing excess adiposity beyond BMI and distinguishing clinical obesity, with related organ dysfunction or substantial limitations in daily activities, from preclinical obesity, where organ function is preserved. [2]

This is an expert framework, not proof that every practice, insurer or medication label has adopted the same rules. It also should not become a reason to wait for complications before discussing health risks and appropriate support.

Make the assessment useful

A more complete visit may consider waist measurements, weight trajectory, glucose and cholesterol, blood pressure, function and the concerns that brought someone to care. The relevant tests depend on the person. A body-composition scan is not a universal requirement. [1,2]

Treatment eligibility and insurance coverage still need to be checked for the specific medication and indication. Recognizing BMI's limits does not automatically expand an approved use or guarantee coverage.

The question worth asking is: what information would help us make a better decision for this person? BMI can open that conversation. Good care continues beyond it.

Sources

1. CDC, About BMI; updated December 16, 2025. https://www.cdc.gov/bmi/about/

2. Rubino et al., Lancet Diabetes & Endocrinology, 2025; expert commission. https://pmc.ncbi.nlm.nih.gov/articles/PMC11870235/

Educational information, not individualized medical advice. Physician approval of column voice and medical content required before publication.