G52.0 – Disorders of olfactory nerve

ICD-10-CM 2027 diagnosis code · Nerve, nerve root and plexus disorders

Billable code

ICD-10-CM code G52.0

Code: G52.0 (claims format: G520)
Description: Disorders of olfactory nerve
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 6. Diseases of the nervous system (G00-G99)
Block: G50-G59 Nerve, nerve root and plexus disorders
Parent codes: G52

Notes for G52.0

Applicable to:

Disorders of 1st cranial nerve

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

G52 – Disorders of other cranial nerves

Excludes2 (not included here):

disorders of acoustic [8th] nerve (H93.3)
disorders of optic [2nd] nerve (H46, H47.0)
paralytic strabismus due to nerve palsy (H49.0-H49.2)

Block G50-G59

Excludes1 (not coded here):

current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
neuralgia NOS (M79.2)
neuritis NOS (M79.2)
peripheral neuritis in pregnancy (O26.82-)
radiculitis NOS (M54.1-)

Index terms for G52.0

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in G52

G52.1 – Disorders of glossopharyngeal nerveBillable
G52.2 – Disorders of vagus nerveBillable
G52.3 – Disorders of hypoglossal nerveBillable
G52.7 – Disorders of multiple cranial nervesBillable
G52.8 – Disorders of other specified cranial nervesBillable
G52.9 – Cranial nerve disorder, unspecifiedBillable

Frequently asked questions

What is ICD-10 code G52.0?

G52.0 is the ICD-10-CM code for disorders of olfactory nerve, in the block G50-G59 (Nerve, nerve root and plexus disorders).

Is G52.0 a billable code?

Yes. G52.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does G52.0 belong to?

It belongs to category G52 – Disorders of other cranial nerves.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.