ICD-10-CM · Spine

M51.34

M51.34 identifies degeneration of one or more intervertebral discs confined to the thoracic spine (T1–T12), without associated radiculopathy or myelopathy.

Verified May 8, 2026 · 5 sources ↓

Status: Billable
Chapter: 13
Related CPT: 14
Region: Spine

Drawn from CDCICD10DataCMSAAPCIcdcodes

Documentation tips

What should appear in the chart to support M51.34.

Source · Editorial brief grounded in 5 cited references ↓

Specify the thoracic region explicitly (e.g., T6–T7 disc) — M51.34 covers T1–T12; junction-level involvement at T12–L1 requires M51.35 instead.
Record imaging findings that confirm degeneration: disc height loss, Modic changes, annular tears, desiccation, or osteophytes on MRI or CT.
Document the absence of radiculopathy and myelopathy symptoms to justify M51.34 over M51.14 or M51.04 — a single line in the assessment is sufficient.
Note any conservative care already attempted (physical therapy, NSAIDs, chiropractic manipulation) to support medical necessity for ongoing or escalating treatment.
If mid-thoracic and thoracolumbar discs are both affected, code each region separately: M51.34 plus M51.35 as appropriate.

Related CPT procedures

Procedure codes commonly billed with M51.34. Linking the right diagnosis to the right procedure is what establishes medical necessity.

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

22532 $1,732.17

Spinal fusion at a single thoracic vertebral segment using the lateral extracavitary approach, which provides a wide posterolateral corridor to the anterior and middle columns without entering the thoracic cavity. Includes minimal discectomy to prepare the interspace for fusion.

22533 $1,547.80

Spinal fusion of a lumbar vertebral segment performed through a lateral extracavitary approach, including minimal discectomy to prepare the interspace (not performed solely for decompression).

22534 $323.65

Add-on code for lateral extracavitary arthrodesis at each additional thoracic or lumbar vertebral segment beyond the first.

22800 $1,312.99

Posterior spinal arthrodesis for deformity correction spanning up to 6 vertebral segments, with or without application of a body cast.

63056 $1,404.84

Lumbar spinal cord and nerve root decompression via transpedicular approach, single segment, including transfacet or lateral extraforaminal variants for far lateral disc herniations.

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.

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.

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.

72072 View procedure details

72074 View procedure details

72075 View procedure details

98940 View procedure details

98941 View procedure details

Common coding pitfalls

The recurring mistakes coders make with M51.34 and adjacent codes.

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

Upcoding to M51.14 when the provider mentions 'radiating pain' without a confirmed radiculopathy diagnosis — M51.34 is correct until radiculopathy is clinically or electromyographically established.
Applying M51.34 to thoracolumbar junction disc degeneration (T12–L1): that level maps to M51.35, not M51.34.
Confusing M51.34 with M51.24 (disc displacement, thoracic region) — degeneration and displacement are distinct pathologies with separate codes; do not interchange them.
Omitting M51.34 and defaulting to an unspecified back pain code (M54.6) when thoracic DDD is clearly documented on imaging — leaving specificity on the table invites audit risk and may reduce reimbursement.
Using M51.34 for a current acute thoracic disc injury — acute traumatic disc injuries are coded with S-codes from the injury chapter, not M51.34.

Clinical context

Source · Editorial summary grounded in 5 cited references ↓

Use M51.34 when imaging or clinical findings confirm thoracic disc degeneration — disc height loss, Modic changes, desiccation, or osteophyte formation — and the provider has not documented radiculopathy or myelopathy. If radiculopathy is present, step up to M51.14 (intervertebral disc disorders with radiculopathy, thoracic region). If myelopathy is documented, use M51.04. M51.34 is strictly thoracic (T1–T12); degeneration at the thoracolumbar junction belongs to M51.35.

This code falls under the M51.3 parent category within the M50–M54 dorsopathies section. The tabular excludes current spinal injuries (code those to the relevant S-code), discitis NOS (M46.4–), cervical/cervicothoracic disc disorders (M50.–), and sacral/sacrococcygeal disorders (M53.3). CMS LCD A56273 explicitly lists M51.34 as a diagnosis supporting medical necessity for chiropractic manipulation services, so accurate use directly affects coverage determinations.

M51.34 maps to MS-DRG 551 (Medical back problems with MCC) or 552 (Medical back problems without MCC) depending on comorbidities. It is a valid standalone billable code — no additional specificity character is required beyond the five digits.

Sibling codes

Other billable codes under M51.3 (laterality / anatomic variants).

M51.35

Other intervertebral disc degeneration, thoracolumbar region

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 5 cited references ↓

01What is the key differentiator between M51.34 and M51.14?

Radiculopathy. M51.34 is thoracic disc degeneration without nerve root symptoms. Once the provider documents — or EMG confirms — radiculopathy, the correct code is M51.14.

02Can M51.34 be used for a disc at the T12–L1 level?

No. The T12–L1 junction is the thoracolumbar region; use M51.35. M51.34 is limited to discs within the purely thoracic spine (T1–T12).

03Does M51.34 require a 7th character?

No. M51.34 is a five-character billable code under Chapter 13 (M-codes). Seventh-character extensions apply to injury S-codes, not to degenerative disc M-codes.

04Is M51.34 on the CMS chiropractic coverage list?

Yes. CMS LCD A56273 explicitly lists M51.34 as a diagnosis code that supports medical necessity for chiropractic manipulation services.

05Can M51.34 be coded alongside a thoracic pain code like M54.6?

Generally, code the underlying condition (M51.34) as the primary diagnosis. Adding a symptom code for thoracic pain is appropriate only when the pain adds clinical information not captured by M51.34 itself — most payers consider mid-back pain inherent to the DDD diagnosis.

06What imaging findings support M51.34 in documentation?

MRI findings of disc height loss, desiccation, Modic changes, or annular fissure in the thoracic spine are the standard supporting evidence. CT showing osteophyte formation or disc space narrowing is also acceptable.

07Which MS-DRGs does M51.34 map to?

M51.34 groups to MS-DRG 551 (Medical back problems with MCC) or 552 (Medical back problems without MCC) under MS-DRG v43.0, depending on the presence of major comorbidities or complications.

Sources & references

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

Mira AI Scribe

Mira's AI scribe captures the thoracic region specified by the provider, MRI or CT findings (disc height loss, Modic changes, desiccation), and explicit documentation that radiculopathy and myelopathy are absent. This prevents inadvertent downcode to an unspecified back pain code or incorrect upcode to M51.14, both of which trigger payer scrutiny.

See how Mira captures M51.34 documentation