At a glance
Which R26 code do I assign?
Category R26 splits abnormal gait and mobility by what the provider describes: an ataxic gait, a paralytic gait, difficulty walking, unsteadiness, another specified abnormality or an unspecified one. The Alphabetic Index sends difficulty walking and dysbasia to R26.2 and sends psychogenic walking difficulty to F44.4.
Tabular notes
Operational & financial impact
Why specificity matters beyond the chart: risk adjustment, DRG assignment and denial exposure all follow from which code is selected.
Documentation checklist to support R26.2
Chart elements that support code selection and reduce specificity-driven denials.
FAQ
Yes. R26.2 is a complete code with no further characters. It appears in the FY2027 billable code list. Its parent R26 is a category and cannot be reported.
R26.2, Difficulty in walking, not elsewhere classified. The Index entries Walking, difficulty and Dysbasia both send to R26.2. So do Difficult, difficulty, walking and Gait abnormality, walking difficulty NEC. Walking difficulty described as psychogenic indexes to F44.4 instead.
The FY2027 Alphabetic Index has no entry for ambulatory dysfunction. Code the finding the provider describes. Difficulty walking indexes to R26.2, unsteadiness on feet to R26.81, reduced mobility to Z74.09 and a gait abnormality without a type to R26.9. Query the provider when the note gives no description.
The code itself did not change. The FY2027 tabular addenda, effective 1 October 2026, replace the Excludes1 note for unsteadiness on feet (R26.81) at R26.2 with an Excludes2 note. R26.2 and R26.81 may now be reported together when the provider documents both.
Not with R29.6 for the same condition. R26.2 carries an Excludes1 note for falling (R29.6). No Excludes note links R26.2 and Z91.81. Guideline I.C.18.d assigns Z91.81 when the patient has fallen in the past and is at risk for future falls.
No. R26.2 does not appear in the CMS-HCC v28 diagnosis crosswalk. The other R26 codes, R29.6, Z74.09 and Z91.81 do not appear in it either. Risk adjustment follows the established cause, such as hereditary ataxia (G11.9, HCC 200).
Do not report R26.2 as principal diagnosis once a related definitive diagnosis is established (Section II.A). When the provider attributes the walking difficulty to a diagnosis that routinely causes it, code that diagnosis instead (Guideline I.B.5). A sign not routinely associated with the diagnosis may still be coded (Guideline I.B.6).
Yes, for uncertain diagnoses. In the outpatient setting, a diagnosis documented as probable, suspected or rule out is not coded. R26.2 is reported instead (Sections IV.D and IV.H). In inpatient admissions to short-term acute care, long-term care and psychiatric hospitals, an uncertain diagnosis documented at discharge is coded as if it existed (Sections II.H and III.C).
Related codes
Codes in the same family as R26.2. Only codes with a published page render as links.
Sibling codes in the R26 family
- R26.0: Ataxic gait, when a staggering or ataxic gait is documented.
- R26.1: Paralytic gait, when a paralytic or spastic gait is documented.
- R26.89: Other abnormalities of gait and mobility, when the provider documents imbalance or another specified gait abnormality the Index does not list separately.
- R26.9: Unspecified abnormalities of gait and mobility, when a gait abnormality is documented without a type.
Additional codes to consider
Codes outside the R26 family considered alongside R26.2.
Companion: code alongside when documented
- R26.81: Unsteadiness on feet, when unsteadiness is documented with the walking difficulty, which the FY2027 R26.2 Excludes2 note for unsteadiness on feet permits.
- I69.398: Other sequelae of cerebral infarction, when the provider attributes the walking difficulty to an old cerebral infarction, since its use additional code note calls for a code that identifies the sequelae.
Consider instead
- R29.6: Repeated falls, when recent falls are under investigation, which the R26.2 Excludes1 note bars from being reported with R26.2 for the same condition.
- Z74.09: Other reduced mobility, when the provider documents reduced mobility or a chairridden patient.
- R53.2: Functional quadriplegia, when the patient is completely immobile due to severe physical disability or frailty.
- F44.4: Conversion disorder with motor symptom or deficit, when the provider documents psychogenic or hysterical walking difficulty, dysbasia or abasia.
- M62.3: Immobility syndrome (paraplegic), when the provider documents immobility syndrome, which the R26 Excludes1 note bars.
- R27.0: Ataxia, unspecified, when ataxia is documented without a gait statement.
- I73.9: Peripheral vascular disease, unspecified, when the provider documents intermittent claudication or dysbasia angiosclerotica intermittens.
Sources
All claims on this page derive from government and professional-standards sources.
- National Center for Health Statistics. (2026). International classification of diseases, tenth revision, clinical modification (ICD-10-CM) FY2027 files. https://www.cdc.gov/nchs/icd/icd-10-cm/files.html
- Centers for Medicare & Medicaid Services and National Center for Health Statistics. (2026). ICD-10-CM official guidelines for coding and reporting FY2027. https://ftp.cdc.gov/pub/Health_Statistics/NCHS/Publications/ICD10CM/2027/ICD-10-CM-October-1-2026-FY27-Guidelines.pdf
- Centers for Medicare & Medicaid Services. (2025). 2026 model software/ICD-10 mappings. https://www.cms.gov/medicare/payment/medicare-advantage-rates-statistics/risk-adjustment/2026-model-software-icd-10-mappings
- Centers for Medicare & Medicaid Services. (2026). MS-DRG classifications and software, version 44. https://www.cms.gov/medicare/payment/prospective-payment-systems/acute-inpatient-pps/ms-drg-classifications-and-software