Is G09 a billable ICD-10-CM code?

Yes. G09 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does G09 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Inflammatory diseases of the central nervous system (G00-G09).

G09

G09 — Sequelae of inflammatory diseases of central nervous system

Billable / specific codeICD-10-CM

G09 is a billable, specific ICD-10-CM code for sequelae of inflammatory diseases of central nervous system. It is valid for submission on a claim.

Code first

The underlying condition must be sequenced before this code.

condition resulting from (sequela) of inflammatory diseases of central nervous system

Notes

Additional guidance from the ICD-10-CM tabular list.

Category G09 is to be used to indicate conditions whose primary classification is to G00-G08 as the cause of sequelae, themselves classifiable elsewhere. The 'sequelae' include conditions specified as residuals.

Risk adjustment

G09 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

G09 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57204Billing and Coding: MRI and CT Scans of the Head and Neck

How G09 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 G09.

Parencephalitis›sequelae
Sequelae›abscess, intracranial or intraspinal(conditions in G06)
Sequelae›encephalitis or encephalomyelitis(conditions in G04)
Sequelae›infection, pyogenic, intracranial or intraspinal
Sequelae›phlebitis or thrombophlebitis of intracranial or intraspinal venous sinuses and veins(conditions in G08)
Abscess›cerebellum, cerebellar›sequelae
Abscess›cerebral›sequelae
Sequelae›meningitis›bacterial(conditions in G00)
Sequelae›meningitis›other or unspecified cause(conditions in G03)
Suppuration, suppurative›brain›sequelae
Thrombophlebitis›cerebral›sequelae
Thrombophlebitis›intracranial venous sinus›sequelae

Questions about G09

Is G09 a billable ICD-10-CM code?: Yes. G09 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does G09 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Inflammatory diseases of the central nervous system (G00-G09).