2027 ICD-10-CM Diagnosis Code F44.0Dissociative amnesia
ICD-10-CM Codes›F01–F99›F40-F48›F44
- Billable — Valid for Submission
- Risk Adjusts — HCC 153
- Chronic Condition
F44.0 is a billable ICD-10-CM diagnosis code for dissociative amnesia. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 880. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Trauma- and stressor-related disorders.
For Medicare Advantage risk adjustment, F44.0 maps to CMS-HCC Category 153 (Personality Disorders; Anorexia/Bulimia Nervosa) under the V28 model, adding a risk factor of about 0.396 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
F44.0 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Dissociative amnesia
- Localized dissociative amnesia
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to F44.0: its own notes plus those printed at F44 and Chapter 5. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- conversion hysteria
- conversion reaction
- hysteria
- hysterical psychosis
- disorders of psychological development
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.
- malingering [conscious simulation] (Z76.5)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name F44.0, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming F44.0: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 2
These codes carry an Excludes2 note naming F44.0: its condition is not part of those codes, and both may be reported when the patient has both.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
dissociative F44.0
hysterical F44.0
psychogenic F44.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Dissociative Amnesia
a disorder characterized by a retrospective gap in memory of important personal information, usually of a traumatic or stressful nature; the memory loss far exceeds ordinary forgetfulness and is not the result of substance use or the consequence of a medical condition.
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 F44.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About F44.0Overview
What is the ICD-10 code for dissociative amnesia?
The ICD-10-CM code for dissociative amnesia is F44.0 (sometimes written as F440). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is F44.0 (Dissociative and conversion disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report dissociative amnesia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does F44.0 group to?
When dissociative amnesia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 880 (acute Adjustment Reaction and Psychosocial Dysfunction), which carries a relative weight of 0.9306. Higher weights mean higher Medicare reimbursement.
Can F44.0 be reported with R41.3?
Not as a rule. The Excludes1 note on F44.0 lists "amnesia NOS (R41.3)". 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).
What is the ICD-9 equivalent of F44.0?
Under the General Equivalence Mappings, dissociative amnesia converts to ICD-9-CM 300.12 (dissociative amnesia). The mapping is a direct match.
What HCC is F44.0?
F44.0 (dissociative amnesia) maps to CMS-HCC Category 153 (Personality Disorders; Anorexia/Bulimia Nervosa), commonly written as HCC 153, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 60 under the retired V24 model. It also maps in the ESRD (V24) model. In the Part D prescription drug model it maps to RxHCC 133.
Does F44.0 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, F44.0 adds a risk adjustment factor of about 0.396 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.199 to 0.464 depending on the payment segment). A more severe related category (HCC 151 and HCC 152) supersedes it when both are reported. See the full factor table on the HCC 153 category page.
