2026 ICD-10-CM Diagnosis Code R29.701NIHSS score 1

ICD-10-CM Codes›R00–R99›R25-R29›R29

ICD-10-CM R29.701
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R29.701 is a billable ICD-10-CM diagnosis code for NIHSS score 1. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cerebral infarction.

Code Identity

ICD-10-CM Code
R29.701
Billable Status
Yes — Valid for Submission
Code Describes
NIHSS score 1
Short Description
NIHSS score 1
Same as the full description in the CMS dataset.
Parent Code
R29.70
NIHSS score 0-9

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR25-R29Symptoms and signs involving the nervous and musculoskeletal systems
CategoryR29Other symptoms and signs involving the nervous and musculoskeletal systems
This CodeR29.701NIHSS score 1

Code EditsBilling

Medicare Code Editor checks that affect claim validity for R29.701.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Clinical ClassificationClinical

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

CCSR CIR020
Cerebral infarction
Default principal diagnosis: inpatient No · outpatient No

Convert R29.701 to ICD-9-CMHistory

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

ICD-9-CM
No Map There is no ICD-9 equivalent for this code.

Code HistoryHistory

FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R29.701Overview

Is R29.701 (NIHSS score 0-9) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report NIHSS score 1 on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can R29.701 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because NIHSS score 1 describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.