ICD-10-CM · Spine

M54.32

M54.32 captures sciatica confirmed on the left side — radiating pain along the left sciatic nerve distribution, from the lumbar spine through the buttock and down the left leg.

Verified May 8, 2026 · 7 sources ↓

Status: Billable
Chapter: 13
Related CPT: 10
Region: Spine

Drawn from CDCICD10DataAAPCCMSMedsolercm

Documentation tips

What should appear in the chart to support M54.32.

Source · Editorial brief grounded in 7 cited references ↓

Provider must explicitly state 'left' side or 'left-sided sciatica' — do not infer laterality from imaging alone without a clinical correlation statement.
Record straight leg raise test result by side: a positive left SLR at a specific angle (e.g., 45°) directly supports M54.32 over an unspecified code.
Document the pain distribution pathway (e.g., left L5-S1 dermatomal pattern, posterior thigh to lateral calf) to differentiate true sciatica from non-radicular left leg pain.
If a herniated disc or spinal stenosis is confirmed as the causative pathology, document that linkage — it shifts the correct code to M51.1- or another structural category, not M54.32.
For chronic presentations, document symptom duration to support any co-assigned G89.29 (Other chronic pain) if pain management is the encounter purpose.

Related CPT procedures

Procedure codes commonly billed with M54.32. Linking the right diagnosis to the right procedure is what establishes medical necessity.

Source · CMS LCDs · AAOS specialty guidance · claims-pattern analysis

99213 $95.19

Established patient office or outpatient visit requiring 20–29 minutes of total time or low-complexity medical decision-making.

99214 $135.61

Office visit for an established patient requiring moderate-complexity medical decision making (MDM), or 30–39 minutes of total provider time on the date of service.

72148 $191.72

Non-contrast MRI of the lumbar spine used to evaluate disc pathology, spinal stenosis, nerve root compression, and other structural abnormalities without administration of contrast material.

72158 $318.31

MRI of the lumbar spinal canal and its contents performed first without contrast, then repeated after contrast administration for enhanced visualization.

97110 $29.06

Therapeutic exercise billed per 15-minute unit, targeting strength, endurance, range of motion, or flexibility with direct one-on-one patient contact.

64483 View procedure details

64484 View procedure details

95907 View procedure details

97012 View procedure details

62323 View procedure details

Common coding pitfalls

The recurring mistakes coders make with M54.32 and adjacent codes.

Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓

Assigning M54.32 when a disc disorder is the confirmed cause — Excludes1 rules out M54.3x entirely; use M51.1- (intervertebral disc derangement with radiculopathy) instead.
Using M54.32 alongside M54.42 — if low back pain and left sciatica are both present as part of the same complaint, M54.42 (Lumbago with sciatica, left side) is the single correct code; you cannot report both.
Defaulting to M54.30 (unspecified side) when the provider's note clearly identifies the left leg as symptomatic — payers flag unspecified laterality when specificity is available in the record.
Conflating radiculopathy with sciatica: M54.12- through M54.17 (Radiculopathy by spinal level) is the correct family when the provider documents nerve root compression at a specific lumbar level without using the term 'sciatica.'

Clinical context

Source · Editorial summary grounded in 7 cited references ↓

Use M54.32 when the provider has documented left-sided sciatic nerve irritation or compression producing the characteristic radicular pain pattern: lower back through the left buttock, posterior thigh, and into the leg or foot. Laterality must be explicit in the clinical note — a positive straight leg raise on the left, dermatomal pain distribution, or direct provider statement of 'left-sided sciatica' all support this code.

M54.32 sits under the M54.3 (Sciatica) parent, which carries a critical Excludes1 note. You cannot report M54.32 alongside lesion of sciatic nerve (G57.0-), sciatica due to intervertebral disc disorder (M51.1-), or sciatica with lumbago (M54.4-). If the patient also has concurrent low back pain that is part of the same clinical picture, drop to M54.42 (Lumbago with sciatica, left side). If imaging confirms a disc herniation as the cause, M51.1- is the correct family.

For encounters focused on pain management rather than definitive diagnosis, CMS guidelines allow a G89 chronic or acute pain code as an additional code after the site-specific M54.32, when the pain category adds clinical meaning. If laterality is genuinely undocumented after chart review, fall back to M54.30 (unspecified side) — but payers reject unspecified codes more frequently when the clinical note clearly names the affected leg.

Sibling codes

Other billable codes under M54.3 (laterality / anatomic variants).

M54.31

Sciatica, right side

M54.30

Sciatica, unspecified side

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 7 cited references ↓

01Can I use M54.32 when a herniated disc is causing the sciatica?

No. An Excludes1 note under M54.3 prohibits M54.32 when sciatica is due to an intervertebral disc disorder. Use M51.1- (disc degeneration with radiculopathy at the appropriate lumbar level) instead.

02When should I use M54.42 instead of M54.32?

Use M54.42 (Lumbago with sciatica, left side) when the patient presents with both low back pain and left-sided sciatica as part of the same condition. M54.32 alone does not capture the lumbago component, and you cannot report M54.32 and M54.42 together due to the Excludes1 restriction.

03Is M54.32 appropriate for bilateral sciatica?

No. M54.32 is laterality-specific to the left side. For bilateral sciatica, the approximate synonym appears in some references, but ICD-10-CM does not have a dedicated bilateral code under M54.3 — code each side separately (M54.31 and M54.32) or query the provider for clarification on the primary symptomatic side.

04Can M54.32 and a G89 pain code be reported together?

Yes, when the encounter is for pain management specifically. Per CMS coding guidelines, assign G89 (e.g., G89.29 for other chronic pain) as an additional code after M54.32 when the pain category adds clinical meaning to the encounter. Do not add G89 if the encounter is for evaluation and treatment of the underlying condition.

05What if the provider documents left leg radicular pain but does not use the word 'sciatica'?

Query the provider. If the note describes left lumbar nerve root compression with radicular symptoms, M54.12- through M54.17 (Radiculopathy by spinal region) may be more accurate than M54.32. Code only what is documented — do not assign 'sciatica' based on symptom pattern alone.

06Does M54.32 require a 7th character extension?

No. M54.32 is a 5-character M-code. The 7th-character extensions (A, D, S) apply to injury S-codes, not to M-category dorsopathy codes. M54.32 is valid and complete as coded.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

The Mira AI Scribe captures the affected side, pain radiation pathway (e.g., left lower back → buttock → posterior thigh → calf/foot), SLR test result with angle and side, and any imaging findings (disc herniation, foraminal stenosis, nerve root involvement). That documentation locks in M54.32 over the unspecified M54.30 and preempts an Excludes1 conflict if a structural cause is later confirmed.

See how Mira captures M54.32 documentation