Extrapyramidal and movement disorders in diseases classified elsewhere
In Extrapyramidal and movement disorders (G20-G26), chapter 6: Diseases of the Nervous System
- G26 is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under G20-G26 below.
- As a secondary diagnosis it is not a CC or MCC, so it doesn't raise the MS-DRG payment.
- Doesn't count toward a Medicare Advantage risk score (no HCC in V28).
- AHRQ's Chronic Condition Indicator classes it as chronic: expected to last 12 months or longer and to limit daily life or need ongoing care.
- Can't be the principal diagnosis: code the underlying condition first. (Manifestation list)
Also indexed as: Disorder, extrapyramidal, in diseases classified elsewhere; Disorder, movement, in diseases classified elsewhere
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Instructional notes
Code first: code the underlying condition first, then this code
- underlying disease
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers default dominant or nondominant side for hemiplegia and monoplegia, and use and sequencing of G89 pain codes, including postoperative, chronic, and neoplasm-related pain.
- Dominant/nondominant side (page 45)
- Pain - Category G89 (page 45)
Other codes under G20-G26
Extrapyramidal and movement disorders (G20-G26)
- G20Parkinson's disease
- G21Secondary parkinsonism
- G23Other degenerative diseases of basal ganglia
- G24Dystonia
- G25Other extrapyramidal and movement disorders
- G26Extrapyramidal and movement disorders in diseases classified elsewhere(this code)
G26 MS-DRGs
As the principal diagnosis, G26 groups to MS-DRG 056 or 057 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Related conditions
Grouped by AHRQ's Clinical Classifications Software Refined (CCSR), which sorts every diagnosis code into clinically meaningful categories.
G26 is in Other nervous system disorders (often hereditary or degenerative) (NVS006), with 103 codes. Others in it:
Medicare coverage articles listing G26
These 12 Medicare billing and coding articles list G26 as a diagnosis that supports medical necessity for the services they cover. From the CMS Medicare Coverage Database; check your own contractor's article before billing.
- Psychiatry and Psychology Services (2 contractors)
- Assays for Vitamins and Metabolic Function
- CT of the Head
- Heavy Metal Testing
- Home Health - Psychiatric Care
- MRI and CT Scans of the Head and Neck
- Neurophysiology Evoked Potentials (NEPs)
- Outpatient Psychiatry and Psychology Services
- Psychiatric Codes
- Psychological and Neuropsychological Tests
And 2 more.
Other codes that refer to G26
Notes on these codes point to G26.
- R25 Excludes1: specific movement disorders (G20-G26)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Movement Disorders
Movement disorders are neurologic conditions that cause problems with movement, such as: There are many different movement disorders. Some of the more common types include:
Read more about movement disorders on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 333.99 Other extrapyramidal diseases and abnormal movement disorders (approximate)