At 21–22 years of age, most males have complete fusion of their growth plates, so significant natural height increase is unlikely. If you wish to know for certain, the most appropriate initial investigation is an X-ray of the left hand and wrist (bone age assessment). If the growth plates are fused, there is no meaningful natural height growth potential remaining.

At 21 years of age, significant natural height growth is unlikely, because the growth plates are usually fused by this stage in males. Exceptions can occur with markedly delayed puberty or certain hormonal conditions. The usual first investigation is a bone-age X-ray of the left hand and wrist. It can show whether skeletal maturation is complete, although adult-height prediction becomes less useful once the bones are fully mature. A knee X-ray is generally unnecessary unless there is a specific reason to examine the distal femoral or proximal tibial growth plates. You may initially consult an orthopaedic doctor for examination and the X-ray. However, an endocrinologist is preferable if you had delayed puberty, very little facial/body hair, recent continuing height growth, thyroid-related symptoms, chronic illness, or concerns about a hormonal growth disorder. Endocrine evaluation may include thyroid tests, testosterone and other hormone investigations depending on the clinical findings.

X-ray of wrist and knee required Go to both orthopedic specialist and endocrinologist

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Xray of knee Visit both Height depends upon bone growth as well as hormones Visit both ortho and endocrinologist