M81.9Osteoporosis, unspecified
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use M81.9 directly
Use the most specific code supported by the record.
- Chapter XIII
- musculoskeletal system and connective tissue
- Group M80-M94
- chondropathies
- Official Vietnamese name
- Loãng xương, không xác định
Related M81 codes
M81
Osteoporosis without pathological fracture
M81.0
Postmenopausal osteoporosis
M81.00
Primary diagnosis candidate
Postmenopausal osteoporosis, multiple sites
M81.01
Primary diagnosis candidate
Postmenopausal osteoporosis, shoulder region
M81.02
Primary diagnosis candidate
Postmenopausal osteoporosis, upper arm
M81.03
Primary diagnosis candidate
Postmenopausal osteoporosis, forearm
M81.04
Primary diagnosis candidate
Postmenopausal osteoporosis, hand
M81.05
Primary diagnosis candidate
Postmenopausal osteoporosis, pelvic region and thigh
M81.06
Primary diagnosis candidate
Postmenopausal osteoporosis, lower leg
M81.07
Primary diagnosis candidate
Postmenopausal osteoporosis, ankle and foot
M81.08
Primary diagnosis candidate
Postmenopausal osteoporosis, other
M81.09
Primary diagnosis candidate
Postmenopausal osteoporosis, site unspecified
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
