Is G37.3 a billable ICD-10-CM code?

Yes. G37.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does G37.3 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Demyelinating diseases of the central nervous system (G35-G37).

What cannot be coded together with G37.3?

G37.3 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G37.3

G37.3 — Acute transverse myelitis in demyelinating disease of central nervous system

Billable / specific codeICD-10-CM

G37.3 is a billable, specific ICD-10-CM code for acute transverse myelitis in demyelinating disease of central nervous system. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

acute flaccid myelitis (G04.82)
multiple sclerosis (G35-)
neuromyelitis optica [Devic] (G36.0)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Acute transverse myelitis NOS
Acute transverse myelopathy

Other codes that can never be billed with G37.3

These codes carry an Excludes1 note pointing at G37.3. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G37.3 alone.

G04.82Acute flaccid myelitis

Risk adjustment

G37.3 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 182 Spinal Cord Disorders/Injuries0.478 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

G37.3 is named in 21 Medicare coverage policies — 21 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A54095Billing and Coding: Nerve Conduction Studies and Electromyography
A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A54969Billing and Coding: Nerve Conduction Studies and Electromyography
A56551Billing and Coding: Visual Fields Testing

How G37.3 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G37.3.

Myelitis›transverse(in demyelinating diseases of central nervous system)
Myelopathy›transverse, acute

Related codes at this level

Codes that share G37. If G37.3 is not quite right, the correct code is usually one of these.

Questions about G37.3

Is G37.3 a billable ICD-10-CM code?: Yes. G37.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does G37.3 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Demyelinating diseases of the central nervous system (G35-G37).
What cannot be coded together with G37.3?: G37.3 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.