Obesity and Underweight at the Board: BMI Thresholds Explained

The short answer: excess weight on its own does not exempt from conscription — and that is probably the most common misconception around article 13. Grade I obesity gives category A-2, meaning fit. Grade II gives B-3. And even grade III obesity, when first detected, means not an exemption but a six-month deferral for treatment.

Which fitness category excess weight yields

How nutritional status is assessed

The regulation names the instrument directly:

To assess nutritional status the body mass index (BMI) is used, determined by the formula: body mass (kg) / height (m)². A BMI below 18.5 is regarded as insufficient nutrition…

Your body mass index takes a minute to calculate — the first thing worth doing before the board, to know which line of the article is even in play. The regulation separately states that for military medical assessment the clinical guidelines "Obesity" apply.

Grade III obesity: a deferral first, not a category

This is where expectations most often go wrong:

Citizens in whom grade III alimentary obesity is first detected at conscription are recognised under clause «g» as temporarily unfit for military service for 6 months. Where necessary the same conclusion may be issued again, and where treatment of obesity has been unsuccessful, assessment is carried out under clause «b».

The path is therefore: six months for treatment, repeated if necessary, and only if treatment failed does clause «b» with category V apply. A high number on the scales does not by itself produce a category.

When obesity yields category D

Clause «a» requires not only the grade but its consequences:

grade III obesity in the presence of associated diseases whose course is directly linked to obesity (type 2 diabetes mellitus, non-alcoholic fatty liver disease, obstructive sleep apnoea syndrome, cardiovascular diseases), accompanied by moderate or significant functional impairment

Each of those conditions is also assessed under its own article: diabetes, for instance, under the same article 13, where the category is V regardless of weight. More on that on the page about diabetes and conscription.

Underweight: article 86

A deficit of body mass is assessed not only by clause «d» of article 13 but by a separate article, 86, "Insufficient physical development":

The logic mirrors grade III obesity: on first detection time is given for examination and treatment, and only a persistent state leads to category V.

An important proviso: where insufficient nutrition is present, citizens are subject to examination on an outpatient or inpatient basis, and if a disease causing it is found, assessment follows the article of that disease. Thinness against a background of bowel disease, for example, is assessed not by weight.

What your records must contain

• Height and weight with a calculated BMI, recorded in the chart, ideally over time.
• An endocrinologist's conclusion stating the grade of obesity and its nature — alimentary or secondary.
• A work-up for associated diseases: glucose and HbA1c, liver tests, and where indicated an assessment of sleep apnoea.
• For underweight — results of a search for the cause: the regulation explicitly requires looking for a disease.
• A treatment history: what was prescribed and with what result — the move from clause «g» to «b» depends on it.

What is usually missing

• Weight is recorded but height is not, so BMI cannot be calculated.
• It is not stated whether the obesity is alimentary or secondary — while clauses «d» and «e» speak of alimentary specifically.
• No work-up for associated diseases, though they are what move a case into clause «a».
• With underweight, no search for a cause; which tests assess metabolism and why weight can stall is covered separately.
• No record of treatment over the past six months where a temporary decision was issued earlier.

Questions for your doctor

• What is my BMI and which grade of obesity does it correspond to under the clinical guidelines?
• Is the obesity alimentary or secondary to another disease?
• Are there associated diseases from the clause «a» list, and is function impaired?
• If I was underweight, was a cause sought and what was found?
• What treatment was prescribed and with what result?

Weight at departmental boards

The above concerns assessment under Government Decree No. 565. The Interior Ministry, National Guard, Federal Security Service and Emergencies Ministry use their own schedules of diseases, often with stricter physical-development requirements. A review under articles 13 and 86 shows how complete your records are but is not their regulation.

The short version

Weight is where expectations diverge from the regulation most: grade I obesity leaves you fit, grade II gives B-3, grade III first means a deferral for treatment. Category V appears only when treatment has failed, and D when diseases with functional impairment are added. Underweight follows a separate article, 86, and likewise begins with a deferral. Only the military medical board determines the fitness category.