S33.100A Subluxation of unspecified lumbar vertebra, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S33.100 with 7th character A (initial encounter).

Applies from S33 Dislocation and sprain of joints and ligaments of lumbar spine and pelvis

Includes

• 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

Excludes1 (never code together)

• nontraumatic rupture or displacement of lumbar intervertebral disc NOS (M51.-)
• obstetric damage to pelvic joints and ligaments (O71.6)

Excludes2 (not included here)

• dislocation and sprain of joints and ligaments of hip (S73.-)
• strain of muscle of lower back and pelvis (S39.01-)

Code also

• any associated open wound

7th character note

• The appropriate 7th character is to be added to each code from category S33

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Applies from S33.1 Subluxation and dislocation of lumbar vertebra

Excludes2 (not included here)

• fracture of lumbar vertebrae (S32.0-)

Code also

• any associated:
• open wound of abdomen, lower back and pelvis (S31)
• spinal cord injury (S24.0, S24.1-, S34.0-, S34.1-)

Code annotations containing back-references to S33.100A

Back-references to S33.1

• Type 1 Excludes: M43.1 Spondylolisthesis ("acute traumatic of lumbosacral region (S33.1)")

Back-references to S33

• Type 2 Excludes: S39 Other and unspecified injuries of abdomen, lower back, pelvis and external genitals ("sprain of joints and ligaments of lumbar spine and pelvis (S33.-)")

Diagnosis Index entries for S33.100A

• Subluxation › vertebral › traumatic › lumbar

Nearby codes

• S33.0XXD Traumatic rupture of lumbar intervertebral disc, subsequent encounter
• S33.0XXS Traumatic rupture of lumbar intervertebral disc, sequela
• S33.1 Subluxation and dislocation of lumbar vertebra
• S33.10 Subluxation and dislocation of unspecified lumbar vertebra
• S33.100 Subluxation of unspecified lumbar vertebra
• S33.100A Subluxation of unspecified lumbar vertebra, initial encounter (this code)
• S33.100D Subluxation of unspecified lumbar vertebra, subsequent encounter
• S33.100S Subluxation of unspecified lumbar vertebra, sequela
• S33.101 Dislocation of unspecified lumbar vertebra
• S33.101A Dislocation of unspecified lumbar vertebra, initial encounter
• S33.101D Dislocation of unspecified lumbar vertebra, subsequent encounter