ICD-10-CM · Spine

M50.20

Cervical intervertebral disc displacement not attributed to myelopathy or radiculopathy, coded when the specific cervical level cannot be identified from the documentation.

Verified May 8, 2026 · 5 sources ↓

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

Drawn from CDCICD10DataCMS

Documentation tips

What should appear in the chart to support M50.20.

Source · Editorial brief grounded in 5 cited references ↓

Document the specific vertebral level (e.g., C5-C6) on every note — MRI or CT report should be referenced by name so the coder can assign M50.221, M50.222, or M50.223 instead of defaulting to M50.20.
Distinguish displacement from degeneration: 'disc displacement' maps to M50.2x; 'disc degeneration' maps to M50.3x. Use both codes if both conditions are documented at different levels.
State explicitly whether neurological deficits are present. 'Neck pain with arm numbness' is not equivalent to 'radiculopathy' — the provider must use that clinical term or document positive Spurling's test, dermatomal sensory loss, or EMG findings to support M50.1x.
Record the absence of myelopathy if the patient has cervical disc displacement without cord signs — this supports M50.20 over M50.0x and reduces audit vulnerability.
If multiple levels are displaced, identify each level and code to the most superior; do not stack M50.20 with a level-specific code for the same clinical episode.

Related CPT procedures

Procedure codes commonly billed with M50.20. Linking the right diagnosis to the right procedure is what establishes medical necessity.

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

22551 $1,604.91

Anterior cervical discectomy and fusion (ACDF) at a single interspace, performed through a front-of-neck approach with removal of disc material and arthrodesis of adjacent vertebral bodies.

22552 $353.05

Add-on code for each additional cervical interspace fused via anterior interbody approach during the same session as the primary procedure (22551), including disc space preparation, discectomy, osteophytectomy, and spinal cord or nerve root decompression below C2.

22554 $1,215.79

Anterior interbody arthrodesis of the cervical spine below C2, performed via anterior approach with minimal diskectomy to prepare the interspace for fusion — not performed for decompression purposes.

22600 $1,282.93

Posterior or posterolateral cervical spinal fusion at a single interspace below C2, performed through a posterior approach to achieve bony arthrodesis.

63045 $1,249.53

Open cervical laminectomy with facetectomy and foraminotomy at a single vertebral level to decompress nerve roots or the spinal cord.

63048 $187.38

Add-on code for laminectomy, facetectomy, and foraminotomy at each additional cervical, thoracic, or lumbar vertebral segment beyond the primary segment.

72141 $190.72

MRI of the cervical spinal canal and its contents performed without contrast material.

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.

99215 $192.39

Highest-level office or outpatient E/M visit for an established patient, qualifying via high-complexity medical decision making or 40–54 minutes of total provider time on the date of service.

22856 $1,522.08

Single-level cervical total disc arthroplasty via anterior approach, including discectomy, endplate preparation, osteophytectomy for nerve root or spinal cord decompression, and microdissection — one interspace only.

22858 $449.24

Anterior cervical total disc arthroplasty at a second interspace level, performed during the same session as the primary-level procedure, including discectomy, end plate preparation, and osteophytectomy as needed.

72142 View procedure details

72156 View procedure details

Common coding pitfalls

The recurring mistakes coders make with M50.20 and adjacent codes.

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

Defaulting to M50.20 when the MRI report clearly names a level (C5-C6, C6-C7, etc.) — always check imaging before accepting the unspecified code.
Adding M54.2 (cervicalgia) as a secondary code when M50.20 is primary — the Excludes 1 note under M54.2 prohibits this combination.
Using M50.20 when arm pain, paresthesia, or reflex changes are documented — those findings require M50.1x (radiculopathy), which carries different medical necessity weight for procedures and injections.
Confusing disc displacement (M50.2x) with disc degeneration (M50.3x) — displacement implies positional change or herniation; degeneration implies structural breakdown. Both can coexist and both can be coded if documented.
Applying M50.20 to cervicothoracic pathology without checking M50.23 — the C7-T1 junction has its own code and should not be lumped into the unspecified category.

Clinical context

Source · Editorial summary grounded in 5 cited references ↓

M50.20 covers displacement of a cervical intervertebral disc — herniation, prolapse, or bulge — where the clinical picture does not include myelopathy (spinal cord involvement) or radiculopathy (nerve root involvement), and the operative or imaging level is not specified. Its ICD-9-CM predecessor was 722.0 (displacement of cervical intervertebral disc without myelopathy). Use it when the record confirms a cervical disc displacement but the provider has not documented which vertebral level is affected.

Within the M50.2 family, specificity increases as you move down the hierarchy: M50.21 (high cervical, C2–C4), M50.220–M50.223 (mid-cervical, C4–C7 by level), and M50.23 (cervicothoracic, C7–T1). M50.20 is the fallback only when the level is genuinely undocumented — not when the coder simply hasn't checked the imaging report. Per CMS GEM guidance, code to the most superior documented level of disorder if multiple levels are affected.

If the displacement causes radicular pain radiating into the arm or hand, step up to M50.1x. If cord signs are present (myelopathy), step up to M50.0x. Do not layer M54.2 (cervicalgia) on top of M50.20 — the Excludes 1 note under M54.2 prohibits that combination. MS-DRG v43.0 groups M50.20 into DRG 551 (medical back problems with MCC) or DRG 552 (without MCC).

Sibling codes

Other billable codes under M50.2 (laterality / anatomic variants).

M50.21

Other cervical disc displacement, high cervical region

M50.23

Other cervical disc displacement, cervicothoracic region

Frequently asked questions

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

01When is M50.20 appropriate versus a level-specific M50.22x code?

Use M50.20 only when the clinical documentation genuinely does not identify the vertebral level. If the MRI or operative note names C4-C5, C5-C6, or C6-C7, assign M50.221, M50.222, or M50.223 respectively. M50.20 is not a safe default when imaging is available.

02Can I code M50.20 with M54.2 (cervicalgia)?

No. The Excludes 1 note under M54.2 prohibits reporting cervicalgia alongside any M50.- code. The cervical disc displacement diagnosis subsumes the neck pain symptom.

03What is the difference between M50.20 and M50.10?

M50.10 requires documented radiculopathy — nerve root compromise producing arm pain, paresthesia, weakness, or reflex change. M50.20 applies when displacement is confirmed but there is no documented radicular or myelopathic component.

04If two cervical levels are displaced, how do I code?

Assign a code for each documented level. Per CMS GEM guidance, code to the most superior level when a single code must represent multi-level disease, but individual level-specific codes are preferred when each level is named in documentation.

05Does M50.20 support medical necessity for cervical disc replacement (CPT 22856)?

CMS LCD L38033 for cervical disc replacement lists specific covered diagnoses. M50.20 (unspecified level) is a weaker medical necessity argument than a level-specific code. Verify payer policy and upgrade to the level-specific code whenever the operative report or pre-surgical imaging supports it.

06What ICD-9 code did M50.20 replace?

M50.20 maps from ICD-9-CM 722.0 (displacement of cervical intervertebral disc without myelopathy) via CMS General Equivalence Mappings, though the mapping is approximate and clinical review is required.

07Is M50.20 valid for cervicothoracic disc displacement?

No. Cervicothoracic disc displacement (C7-T1) has its own code: M50.23. Reserve M50.20 for mid- or upper cervical pathology where the level is undocumented.

Sources & references

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

01CDC ICD-10-CM Tabular List 2026 (effective Oct 1, 2025)
02
icd10data.com
https://www.icd10data.com/ICD10CM/Codes/M00-M99/M50-M54/M50-/M50.20
03
cms.gov
https://www.cms.gov/medicare-coverage-database/view/article.aspx?articleid=57021
04
cms.gov
https://www.cms.gov/Medicare/Coding/ICD10/Downloads/2019-ICD10-Coding-Guidelines-.pdf
05
icd10data.com
https://www.icd10data.com/Convert/M50.20

Mira AI Scribe

Mira AI Scribe captures the cervical level from the imaging report, the presence or absence of radicular or myelopathic signs, and any prior conservative care history (PT, injections, NSAIDs) documented in the encounter note — all of which determine whether M50.20, a level-specific M50.22x, or an M50.1x/M50.0x code is warranted. This prevents unnecessary downgrade to an unspecified code and reduces the audit flag that accompanies M50.20 when MRI findings are on file.

See how Mira captures M50.20 documentation