ICD-10 Code for Lower Rib Pain Syndrome
For slipping rib syndrome specifically, use ICD-10 code M99.08 (Segmental and somatic dysfunction of rib cage). For costochondritis and Tietze syndrome, the appropriate codes are M94.0 (Chondrocostal junction syndrome/Tietze) and M94.8 (Other specified disorders of cartilage - for costochondritis) 1, 2.
Specific Coding by Diagnosis
Slipping Rib Syndrome
- Primary code: M99.08 - This is the established code for rib somatic dysfunction, which encompasses slipping rib syndrome where ribs 8-10 become abnormally mobile due to interchondral ligament laxity 2, 3, 4, 5
Costochondritis vs. Tietze Syndrome
The distinction matters for coding:
- M94.0 (Costochondral junction syndrome/Tietze) - Use when there is localized inflammation with swelling at ≥1 costochondral joints 1
- M94.8 (Other specified disorders of cartilage) - Use for costochondritis when there is inflammation of ≥1 ribs/cartilages without the localized swelling characteristic of Tietze 1
Additional Relevant Codes
- R07.89 - Can be used as a secondary code for "other chest pain" when the musculoskeletal etiology is documented
- S22.3XXA-S22.49XA - Use for rib injury/fracture if trauma-related 6
Clinical Context for Proper Coding
Physical examination findings guide accurate code selection 7, 8, 7, 9:
- Tenderness of costochondral joints on palpation → Points toward M94.0 or M94.8
- Pain with rib manipulation or "hooking maneuver" (pulling anteriorly on lower ribs 8-10) → Suggests M99.08 for slipping rib syndrome
- Localized swelling at costochondral junction → Specifically indicates M94.0 (Tietze) rather than simple costochondritis
Important Coding Pitfalls
Do not use cardiac chest pain codes (I20.x series) for these musculoskeletal conditions, even though patients may present with chest pain 7, 8, 7. The guidelines emphasize that chest tenderness on palpation markedly reduces the probability of acute coronary syndrome and points toward musculoskeletal etiology 7, 9.
Avoid generic "chest pain" codes (R07.x) as the primary diagnosis when a specific musculoskeletal diagnosis has been established through physical examination 7, 8.
Dynamic ultrasound can confirm slipping rib syndrome diagnosis (89% sensitivity) and support the use of M99.08 10, 5.