S33.5XXA ICD-10-CM Code: Sprain of ligaments of lumbar spine, initial encounter
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Inpatient Payment Groups (MS-DRG)
MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.
- MS-DRG 551 — MEDICAL BACK PROBLEMS WITH MCC (MDC 08)
- MS-DRG 552 — MEDICAL BACK PROBLEMS WITHOUT MCC (MDC 08)
- MS-DRG 963 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC (MDC 24)
- MS-DRG 964 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH CC (MDC 24)
- MS-DRG 965 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITHOUT CC/MCC (MDC 24)
A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for S33.5XXA in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- avulsion of joint or ligament of lumbar spine and pelvis
- laceration of cartilage, joint or ligament of lumbar spine and pelvis
- sprain of cartilage, joint or ligament of lumbar spine and pelvis
- traumatic hemarthrosis of joint or ligament of lumbar spine and pelvis
- traumatic rupture of joint or ligament of lumbar spine and pelvis
- traumatic subluxation of joint or ligament of lumbar spine and pelvis
- traumatic tear of joint or ligament of lumbar spine and pelvis
- injuries to the abdominal wall
- injuries to the anus
- injuries to the buttock
- injuries to the external genitalia
- injuries to the flank
- injuries to the groin
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- nontraumatic rupture or displacement of lumbar intervertebral disc NOS (M51.-)
- obstetric damage to pelvic joints and ligaments (O71.6)
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- dislocation and sprain of joints and ligaments of hip (S73.-)
- strain of muscle of lower back and pelvis (S39.01-)
- burns and corrosions (T20-T32)
- effects of foreign body in anus and rectum (T18.5)
- effects of foreign body in genitourinary tract (T19.-)
- effects of foreign body in stomach, small intestine and colon (T18.2-T18.4)
- frostbite (T33-T34)
- insect bite or sting, venomous (T63.4)
Code Also
Additional codes that may be required to fully describe the encounter.
- any associated open wound
Frequently Asked Questions (FAQ) & Clinical Guidance
Does S33.5XXA require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category S33.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to S33.5XXA in its code family, with their registry titles.
- S33.4 — Traumatic rupture of symphysis pubis
- S33.4XXA — Traumatic rupture of symphysis pubis, initial encounter
- S33.4XXD — Traumatic rupture of symphysis pubis, subsequent encounter
- S33.4XXS — Traumatic rupture of symphysis pubis, sequela
- S33.5 — Sprain of ligaments of lumbar spine
- S33.5XXD — Sprain of ligaments of lumbar spine, subsequent encounter
- S33.5XXS — Sprain of ligaments of lumbar spine, sequela
- S33.6 — Sprain of sacroiliac joint
- S33.6XXA — Sprain of sacroiliac joint, initial encounter
- S33.6XXD — Sprain of sacroiliac joint, subsequent encounter