2026 ICD-10-CM Diagnosis Code F34.1Dysthymic disorder
ICD-10-CM Codes›F01–F99›F30-F39›F34
- Billable — Valid for Submission
- Chronic Condition
F34.1 is a billable ICD-10-CM diagnosis code for dysthymic disorder. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 881. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Depressive disorders.
F34.1 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 132 for payment year 2026.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
F34.1 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.
Source: CMS Payment Year 2026 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.
- Dysthymia
- Early onset dysthymia
- Hypomanic personality disorder
- Late onset dysthymia
- Lifelong depressive personality trait
- Primary dysthymia
- Primary dysthymia early onset
- Primary dysthymia late onset
- Secondary dysthymia
- Secondary dysthymia early onset
- Secondary dysthymia late onset
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Depressive neurosis
- Depressive personality disorder
- Dysthymia
- Neurotic depression
- Persistent anxiety depression
- Persistent depressive disorder
Type 2 Excludes
- anxiety depression mild or not persistent F41.8
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Depression (acute) (mental) F32.A
persistent F34.1
nervous F34.1
neurotic F34.1
psychoneurotic F34.1
Disorder (of) See Also: Disease;
persistent F34.1
dysthymic F34.1
dysthymia F34.1
personality See Also: Personality; F60.9
depressive F34.1
hypothymic F34.1
Dysthymia F34.1
depressive F34.1
hypothymic F34.1
Reaction See Also: Disorder;
depressive (single episode) F32.9
neurotic F34.1
psychoneurotic F34.1
neurotic-depressive F34.1
psychoneurotic See Also: Neurosis;
depressive F34.1
neurotic F34.1
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Dysthymic Disorder
chronically depressed mood that occurs for most of the day more days than not for at least 2 years. the required minimum duration in children to make this diagnosis is 1 year. during periods of depressed mood, at least 2 of the following additional symptoms are present: poor appetite or overeating, insomnia or hypersomnia, low energy or fatigue, low self-esteem, poor concentration or difficulty making decisions, and feelings of hopelessness. (dsm-iv)
Patient EducationClinical
Depression
Depression is more than a feeling of being sad or irritable for a few days. It's a serious mood disorder. As one of the most common mental disorders in the United States, depression can affect how you think, feel, and your everyday life.
The full article covers:
- What is depression?
- What are the different types of depression?
- What causes depression?
- Who is at risk of depression?
- What are the symptoms of depression?
- How is depression diagnosed?
- What are the treatments for depression?
- Can depression be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert F34.1 to ICD-9-CMHistory
Code HistoryHistory
Questions About F34.1Overview
What is the ICD-10 code for dysthymic disorder?
The ICD-10-CM code for dysthymic disorder is F34.1 (sometimes written as F341). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is F34.1 (Persistent mood [affective] disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report dysthymic disorder on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does F34.1 group to?
When dysthymic disorder is the principal diagnosis on an inpatient stay, it groups to MS-DRG 881 (depressive Neuroses), which carries a relative weight of 0.9409. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of F34.1?
Under the General Equivalence Mappings, dysthymic disorder converts to ICD-9-CM 300.4 (dysthymic disorder) and 301.12 (chr depressive person). The mapping is approximate, so confirm the match fits the documentation.
Does F34.1 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage: F34.1 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 132 (Depression).
