ICD-10-CM · Spine

M47.9

M47.9 captures a diagnosis of spondylosis — degenerative osteoarthritis of the spine — when the clinical documentation does not specify the affected spinal region, the presence of myelopathy, or the presence of radiculopathy.

Verified May 8, 2026 · 7 sources ↓

Status: Billable
Chapter: 13
Related CPT: 19
Region: Spine

Drawn from CDCICD10DataAAPCIcdlistOutsourcestrategies

Documentation tips

What should appear in the chart to support M47.9.

Source · Editorial brief grounded in 7 cited references ↓

Document the specific spinal region (cervical, thoracic, lumbar, lumbosacral, etc.) whenever it is identifiable from exam or imaging — this unlocks M47.81x and avoids M47.9.
Record whether myelopathy signs (hyperreflexia, gait disturbance, upper motor neuron findings) or radiculopathy symptoms (dermatomal pain, positive straight-leg raise, EMG findings) are present or absent — each has its own subcategory within M47.
Include imaging results (X-ray, MRI, CT) that confirm degenerative changes: osteophyte formation, disc space narrowing, Kellgren-Lawrence equivalent grade, or foraminal stenosis.
If the patient has prior spinal fusion, add Z98.1 alongside a site-specific M47.81x rather than defaulting to M47.9; post-fusion cases coded as M47.9 are a known audit trigger.
Document the rationale when specificity cannot be established — e.g., 'multilevel disease spanning cervical through thoracic, no dominant region' — so M47.9 is defensible on audit.

Related CPT procedures

Procedure codes commonly billed with M47.9. Linking the right diagnosis to the right procedure is what establishes medical necessity.

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

72020 $23.71

Single-view radiologic examination of the spine at a specified level.

72040 $39.75

Radiologic examination of the cervical spine capturing two or three views (e.g., AP, lateral, oblique).

72050 $55.11

Radiologic examination of the cervical spine capturing a minimum of four views, used to evaluate alignment, fractures, degeneration, or other structural pathology of the neck.

72052 $62.79

Radiologic examination of the cervical spine using six or more distinct views, the highest-level plain-film cervical series in the CPT spine imaging family.

72070 $33.07

Two-view radiologic examination of the thoracic spine, including AP and lateral projections of the 12 thoracic vertebrae.

72072 $38.75

Radiographs of the thoracic spine with three views, typically a frontal, a lateral, and one added projection such as a swimmer's view.

72074 $44.09

Thoracic spine radiographs with at least four views, adding obliques or other projections to the standard frontal and lateral images.

72080 $35.07

Radiologic examination of the thoracolumbar junction (where the thoracic and lumbar spine meet), requiring a minimum of two views.

72100 $40.42

Radiologic examination of the lumbosacral spine capturing two or three views, used to evaluate the lumbar vertebrae and sacrum for injury, degeneration, or structural abnormality.

72110 $53.44

Radiologic examination of the lumbar spine (lumbosacral) with a minimum of four views, including oblique and/or bending views.

72120 $42.09

Radiologic examination of the lumbosacral spine using bending views only, minimum of four views, to assess spinal flexibility and alignment.

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.

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.

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.

97014 $12.69

Unattended electrical stimulation applied to one or more areas as a supervised modality, with no constant one-on-one contact required.

62321 $276.56

Cervical or thoracic interlaminar epidural or subarachnoid injection of a drug such as a steroid, done with fluoroscopic or CT imaging guidance.

64492 $102.21

Add-on for a third or later cervical or thoracic facet joint or medial branch level injected in one session, with imaging guidance included.

Common coding pitfalls

The recurring mistakes coders make with M47.9 and adjacent codes.

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

Using M47.9 when imaging or the physical exam note identifies a spinal region — if a level is documented anywhere in the chart, a site-specific M47.81x, M47.2x, or M47.1x code is required.
Defaulting to M47.9 when radiculopathy is documented; radicular symptoms require M47.2x (spondylosis with radiculopathy) with the correct site 6th character.
Coding M47.9 for post-surgical spinal fusion patients instead of combining a site-specific M47.81x with Z98.1, which can trigger claim denial.
Confusing M47.9 with M47.899 (other spondylosis, site unspecified) — M47.899 applies to 'other spondylosis' without myelopathy or radiculopathy at an unspecified site, while M47.9 is the catch-all for spondylosis when no subcategory applies.

Clinical context

Source · Editorial summary grounded in 7 cited references ↓

M47.9 is the code of last resort within the M47 family. Use it only when the provider's documentation genuinely cannot support a more specific code — meaning no spinal region is identified, and no myelopathy or radiculopathy is documented. The M47 category contains highly granular alternatives: M47.1x for spondylosis with myelopathy, M47.2x for spondylosis with radiculopathy, and M47.81x for spondylosis without myelopathy or radiculopathy — all carrying site-specific 6th characters for eight spinal regions. If any of those elements appear in the record, a more specific code is required and M47.9 becomes incorrect.

Spondylosis represents degenerative change of the bony spine — osteophyte formation, disc space narrowing, and facet arthropathy — most commonly affecting the cervical and lumbosacral regions. Symptoms range from axial back or neck pain aggravated by motion to radicular pain when nerve roots are compressed; large osteophytes can be present in asymptomatic patients. Because the clinical picture varies widely, imaging findings (X-ray, CT, MRI) and neurological exam results are critical to selecting the correct specificity level.

M47.9 is billable and payer-accepted, but unspecified codes carry higher audit scrutiny. Payers including BCBS have issued denials when submitted diagnosis codes lack consistency with documented clinical information. If the provider documents a spinal level at any point in the note — even in the imaging report addended to the record — code to that level. Reserve M47.9 for cases where specificity is genuinely unobtainable at the time of the encounter.

Frequently asked questions

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

01When is M47.9 the correct code instead of a more specific M47 subcategory?

M47.9 is correct only when the clinical documentation does not identify a spinal region and does not specify the presence or absence of myelopathy or radiculopathy. If any of those elements appear in the record, a subcategory code is required.

02Can M47.9 be used if the provider just writes 'spondylosis' with no further detail?

Yes, if the note truly contains no spinal region, no myelopathy, and no radiculopathy documentation, M47.9 is the appropriate code. However, the coder should query the provider or review imaging before accepting that level of vagueness, since additional specificity may be available.

03What is the difference between M47.9 and M47.899?

M47.899 is 'other spondylosis, site unspecified' under the M47.89 subcategory, used when the condition is 'other spondylosis' (not covered by myelopathy, radiculopathy, or anterior spinal artery compression subcategories) but the site is unknown. M47.9 is the top-level unspecified code when no subcategory within M47 can be determined at all.

04Does M47.9 require a 7th character?

No. M47.9 is a 4-character code and does not accept 7th-character extensions. The M47 category uses 6th characters to capture spinal site in subcategories — M47.9 sits outside those subcategories and has no additional characters.

05How should a coder handle a patient with spondylosis documented at both the lumbar and cervical spine?

Code each affected region separately with the appropriate site-specific code — for example, M47.816 (lumbar) and M47.812 (cervical) — rather than collapsing to M47.9. ICD-10-CM guidelines direct coders to code to the highest degree of specificity supported by documentation.

06Is M47.9 accepted for pain management procedure codes like 64492 or 62321?

Payer acceptance varies. M47.9 may be denied by some payers — including BCBS — as insufficiently specific to establish medical necessity for interventional pain procedures. A site-specific M47.81x or M47.2x code is strongly preferred when submitting with procedural codes for spinal injections.

07What imaging documentation supports M47.9 on audit?

Radiology reports noting degenerative changes of the spine — osteophyte formation, disc space narrowing, end-plate sclerosis — support the spondylosis diagnosis. If those findings point to a specific region, upgrade to the corresponding site-specific code rather than retaining M47.9.

Sources & references

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

Mira Scribe

Mira's AI scribe captures spinal region from provider dictation and imaging references, documents the presence or absence of myelopathy and radiculopathy based on exam findings and EMG results, and flags post-fusion status to prompt Z98.1 pairing. This prevents default to M47.9 when a site-specific M47.81x, M47.2x, or M47.1x code is supportable, reducing audit exposure and payer denials tied to unspecified diagnosis codes.

See how Mira captures M47.9 documentation