2027 ICD-10-CM Diagnosis Code G07Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere

ICD-10-CM Codes›G00–G99›G00-G09›G07

ICD-10-CM G07
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G07 is a billable ICD-10-CM diagnosis code for intracranial and intraspinal abscess and granuloma in diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 23 through 24, 94 through 96, 791, 793. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 72 closely related codes. The code is a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as granuloma of brain caused by Schistosoma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under CNS abscess.

Code Identity

ICD-10-CM Code
G07
Billable Status
Yes — Valid for Submission
Code Describes
Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere
Short Description
Intcrn & intraspinal abscs & granuloma in dis classd elswhr
Chapter
G00-G09
Inflammatory diseases of the central nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG00-G09Inflammatory diseases of the central nervous system
CategoryG07Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere
This CodeG07Intracranial and intraspinal abscess and granuloma in diseases classified elsewhere

Code EditsBilling

Medicare Code Editor checks that affect claim validity for G07.

Manifestation diagnoses
Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Granuloma of brain caused by Schistosoma
  • Granuloma of brain caused by Schistosoma haematobium
  • Granuloma of brain caused by Schistosoma japonicum
  • Granuloma of brain caused by Schistosoma mansoni
  • Infection causing granuloma of central nervous system
  • Otogenic intracranial abscess
  • Schistosoma haematobium infection
  • Schistosoma japonicum infection
  • Schistosoma mansoni infection
  • Schistosomal granuloma of central nervous system

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G07: its own notes plus those printed at Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Code First

The underlying condition named in the note is sequenced before this code.

  • underlying disease, such as:
  • schistosomiasis granuloma of brain (B65.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name G07, its category, or a range that includes it.

Notes 1

These notes mention G07.

  • G09 Sequelae of inflammatory diseases of central nervous system
    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. names G00-G08, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS014
CNS abscess
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Abscess

An abscess is a pocket of pus. You can get an abscess almost anywhere in your body. When an area of your body becomes infected, your body's immune system tries to fight the infection. White blood cells go to the infected area, collect within the damaged tissue, and cause inflammation. During this process, pus forms.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert G07 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
324.9 Cns abscess NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G07Overview

Is G07 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report intracranial and intraspinal abscess and granuloma in diseases classified elsewhere on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does G07 group to?

On inpatient claims, intracranial and intraspinal abscess and granuloma in diseases classified elsewhere maps to MS-DRG 793, 791, 24, 23, 96, 95, 94, with relative weights from 2.3173 to 5.7422 depending on complications. Higher weights mean higher Medicare reimbursement.

Is G07 a CC or MCC?

CMS lists G07 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 72 closely related codes in its exclusion list.

Can G07 be a principal diagnosis?

No. This is a manifestation code: intracranial and intraspinal abscess and granuloma in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.

Can G07 be reported with A06.6?

Not as a rule. The Excludes1 note on G07 lists "amebic (A06.6)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).