2027 ICD-10-CM Diagnosis Code F43.20Adjustment disorder, unspecified
ICD-10-CM Codes›F01–F99›F40-F48›F43
- Billable — Valid for Submission
- Not Chronic
F43.20 is a billable ICD-10-CM diagnosis code for adjustment disorder, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 882. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Trauma- and stressor-related disorders.
F43.20 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 133 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
F43.20 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 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.
- Abnormal grief reaction
- Acute situational disturbance
- Acute stress disorder
- Adjustment disorder
- Adjustment disorder during pregnancy
- Adjustment disorder in remission
- Adjustment disorder with anxious mood
- Adjustment reaction in infancy
- Adjustment reaction of adolescence
- Adjustment reaction of adult life
- Adjustment reaction of childhood
- Adjustment reaction of late life
- Adjustment reaction to medical therapy
- Culture shock
- Difficulty adapting after personal crisis
- Difficulty coping
- Difficulty coping with grief responses
- Does not adapt after personal crisis
- Does not speak
- Does not use language
- Dysfunctional grieving
- Fails to recognize stages of grief
- Finding related to ability to speak
- Grieving process stage - finding
- Hospitalism
- Persistent adjustment disorder
- Postpartum adjustment disorder
- Selective mutism
- Selective mutism due to adjustment reaction
- Stress and adjustment reaction
- Stress-related problem
- Unable to adapt after personal crisis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to F43.20: its own notes plus those printed at F43.2 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.
- disorders of psychological development
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.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name F43.20, its category, or a range that includes it.
Excludes2 4
These codes carry an Excludes2 note naming F43.20: its condition is not part of those codes, and both may be reported when the patient has both.
- F32 Depressive episodeadjustment disorder (F43.2) names F43.2, which includes this code
- F41 Other anxiety disorderstransient adjustment reaction (F43.2) names F43.2, which includes this code
- F94.2 Disinhibited attachment disorder of childhoodhospitalism in children (F43.2-) names F43.2-, which includes this code
- F93.0 Separation anxiety disorder of childhood
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disorder (of) See Also: Disease;
adjustment (grief) F43.20
Nostalgia F43.20
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Adjustment Disorders
maladaptive reactions to identifiable psychosocial stressors occurring within a short time after onset of the stressor. they are manifested by either impairment in social or occupational functioning or by symptoms (depression, anxiety, etc.) that are in excess of a normal and expected reaction to the stressor.
Patient EducationClinical
Mental Disorders
Mental disorders (or mental illnesses) are conditions that affect your thinking, feeling, mood, and behavior. They may happen over a short period of time or come and go. Some can be chronic (long-lasting). They can affect your ability to relate to others and function each day..
The full article covers:
- What are mental disorders?
- What are some types of mental disorders?
- What causes mental disorders?
- Who is at risk for mental disorders?
- How are mental disorders diagnosed?
- What are the treatments for mental disorders?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert F43.20 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About F43.20Overview
What is the ICD-10 code for adjustment disorder, unspecified?
The ICD-10-CM code for adjustment disorder, unspecified is F43.20 (sometimes written as F4320). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is F43.20 (Adjustment disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report adjustment disorder, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does F43.20 group to?
When adjustment disorder, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 882 (neuroses Except Depressive), which carries a relative weight of 0.9953. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of F43.20?
Under the General Equivalence Mappings, adjustment disorder, unspecified converts to ICD-9-CM 309.9 (adjustment reaction NOS). The mapping is approximate, so confirm the match fits the documentation.
Does F43.20 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage: F43.20 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 133 (Anxiety and Other Psychiatric Disorders).
