ICD-10-CM · Spine

M99.60

Narrowing of the intervertebral foramina in the head region caused by bony overgrowth, osseous deposition, or vertebral subluxation that compresses exiting nerve roots at the craniovertebral junction.

Verified May 8, 2026 · 4 sources ↓

Status: Billable
Chapter: 13
Related CPT: 12
Region: Spine

Drawn from CDCICD10DataCMS

Documentation tips

What should appear in the chart to support M99.60.

Source · Editorial brief grounded in 4 cited references ↓

Specify the mechanism: document whether stenosis is due to osteophyte/bony hypertrophy, subluxation, or both — this distinguishes M99.60 from M99.30 (canal) and M99.70 (connective tissue/disc foraminal).
Identify the level explicitly as 'head region' or craniovertebral junction (occiput/C0 level); if the affected foramen is at C1–C7, the correct code shifts to M99.61.
Include imaging findings: CT or MRI evidence of foraminal narrowing, osteophyte encroachment, or positional subluxation at the craniovertebral junction strengthens medical necessity.
Document associated neurological signs or symptoms (radiculopathy, occipital neuralgia, upper extremity findings) to support downstream procedure coding and NCS/EMG medical necessity.
Record prior conservative treatment history if supporting surgical or interventional referral — helps establish medical necessity and reduces payer audit exposure.

Related CPT procedures

Procedure codes commonly billed with M99.60. Linking the right diagnosis to the right procedure is what establishes medical necessity.

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

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.

72156 View procedure details

95907 View procedure details

95908 View procedure details

95909 View procedure details

95910 View procedure details

95911 View procedure details

95912 View procedure details

95913 View procedure details

Common coding pitfalls

The recurring mistakes coders make with M99.60 and adjacent codes.

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

Confusing foraminal stenosis (M99.60) with canal stenosis (M99.30) — they are separate anatomic sites; confirm imaging describes the foramen, not the central spinal canal.
Using M99.60 for cervical-level foraminal stenosis — if the documented level is C1–C7, the correct code is M99.61, not M99.60.
Selecting M99.70 (connective tissue and disc stenosis of intervertebral foramina of head region) when the pathology is primarily bony or subluxation-related; the mechanism must match the subcategory.
Omitting this code when it directly supports NCS/EMG medical necessity — CMS Article A56619 explicitly lists M99.60 as a supporting diagnosis for nerve conduction studies.

Clinical context

Source · Editorial summary grounded in 4 cited references ↓

M99.60 applies when the documented mechanism of foraminal stenosis in the head region is osseous (bony spur, osteophyte, hypertrophic bone) or subluxation-driven — not disc herniation, not connective tissue. The head region in the M99 biomechanical lesion taxonomy refers to the occiput-C0 through upper cervical articulations. Use this code when imaging or clinical findings confirm foraminal compromise at that level attributable to bony or positional pathology.

This code belongs to Category M99 (Biomechanical lesions, not elsewhere classified), which is frequently used by chiropractors, osteopaths, and spine-focused orthopedic practices. It differs from M99.30 (osseous stenosis of the neural canal of the head region) — M99.60 is foraminal, M99.30 is canal-level. Choose based on where the stenosis is documented: foramen vs. central canal.

M99.60 supports medical necessity for nerve conduction studies and electromyography under CMS LCD guidance (see CMS Article A56619). It may also support imaging, manual therapy, or surgical referral. If the stenosis is in the cervical region (C1–C7), use M99.61 instead.

Sibling codes

Other billable codes under M99.6 (laterality / anatomic variants).

M99.67

Osseous and sublux stenosis of intvrt foramina of up extrem

M99.62

Osseous and sublux stenos of intvrt foramin of thor region

M99.68

Osseous and sublux stenosis of intvrt foramina of rib cage

M99.65

Osseous and sublux stenos of intvrt foramin of pelvic region

M99.69

Osseous & sublux stenos of intvrt foramin of abd and oth rgn

M99.61

Osseous and sublux stenosis of intvrt foramin of cerv region

M99.63

Osseous and sublux stenos of intvrt foramin of lumbar region

M99.66

Osseous and sublux stenosis of intvrt foramina of low extrm

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 4 cited references ↓

01What distinguishes M99.60 from M99.30?

M99.30 is osseous stenosis of the neural canal (central canal) of the head region. M99.60 is stenosis of the intervertebral foramina. They describe different anatomic compartments — choose based on whether imaging documents canal vs. foraminal compromise.

02When should I use M99.61 instead of M99.60?

Use M99.61 when foraminal stenosis is documented at the cervical spine level (C1–C7). M99.60 is reserved for the head region, meaning the craniovertebral junction (occiput/C0 articulation).

03Does M99.60 support NCS/EMG billing?

Yes. CMS Article A56619 lists M99.60 among the ICD-10-CM codes that support medical necessity for nerve conduction studies and electromyography. Include it on the order and claim when applicable.

04What is the 'subluxation' component in M99.60?

The subluxation component refers to positional or biomechanical malalignment of vertebral articulations that contributes to foraminal narrowing — distinct from pure bony overgrowth. Both mechanisms are captured under this single code when present at the head region.

05Can M99.60 be used as a primary diagnosis?

Yes — it is a billable, specific code and can be listed as the principal or primary diagnosis when foraminal stenosis of the head region is the condition driving the encounter. Pair with symptom codes (e.g., radiculopathy) as additional diagnoses when clinically applicable.

06Is M99.60 appropriate for chiropractic or osteopathic encounter billing?

Yes. Category M99 is frequently used in chiropractic and osteopathic practice for biomechanical lesions. M99.60 is valid for any provider documenting osseous or subluxation-driven foraminal stenosis at the craniovertebral junction.

Sources & references

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

Mira AI Scribe

Mira AI Scribe captures the location (head/craniovertebral region), mechanism (osseous vs. subluxation vs. disc), imaging findings (osteophyte, foraminal narrowing on MRI or CT), and any associated neurological symptoms documented during the encounter. This prevents downcoding to an unspecified stenosis code or mismatch to the canal-level M99.30, and preserves medical necessity support for NCS/EMG or advanced imaging orders.

See how Mira captures M99.60 documentation