2027 ICD-10-CM Diagnosis Code R41.1Anterograde amnesia
ICD-10-CM Codes›R00–R99›R40-R46›R41
- Billable — Valid for Submission
- Not Chronic
R41.1 is a billable ICD-10-CM diagnosis code for anterograde amnesia. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 947 through 948. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. Coders also document this condition as amnesia for recent events. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nervous system signs and symptoms.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Amnesia for recent events
- Anterograde amnesia
- Cognitive perceptual pattern
- Uncompensated short term memory deficit
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to R41.1: its own notes plus those printed at R41, block R40-R46, and Chapter 18. 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.
Notes
General instructions on how these codes are used.
- This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
- Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
- The conditions and signs or symptoms included in categories R00-R94 consist of:
- (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
- (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
- (c) provisional diagnosis in a patient who failed to return for further investigation or care;
- (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
- (e) cases in which a more precise diagnosis was not available for any other reason;
- (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name R41.1, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
anterograde R41.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Amnesia, Anterograde
loss of the ability to form new memories beyond a certain point in time. this condition may be organic or psychogenic in origin. organically induced anterograde amnesia may follow craniocerebral trauma; seizures; anoxia; and other conditions which adversely affect neural structures associated with memory formation (e.g., the hippocampus; fornix (brain); mammillary bodies; and anterior thalamic nuclei). (from memory 1997 jan-mar;5(1-2):49-71)
Patient EducationClinical
Memory
Every day, you have different experiences and you learn new things. Your brain cannot store all of that information, so it has to decide what is worth remembering. Memory is the process of storing and then remembering this information. There are different types of memory. Short-term memory stores information for a few seconds or minutes.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert R41.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About R41.1Overview
What is the ICD-10 code for anterograde amnesia?
The ICD-10-CM code for anterograde amnesia is R41.1 (sometimes written as R411). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is R41.1 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report anterograde amnesia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does R41.1 group to?
When anterograde amnesia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 948, 947, with relative weights from 0.7833 to 1.2608 depending on complications. Higher weights mean higher Medicare reimbursement.
Can R41.1 be a principal diagnosis?
Use it with care. This is a symptom code, so once a definitive diagnosis explaining the anterograde amnesia is established, that condition takes the principal position instead.
Can R41.1 be reported with a code from F44?
Not as a rule. The Excludes1 note at R41, which applies to R41.1, lists "dissociative [conversion] disorders (F44.-)". 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).
