2027 ICD-10-CM Diagnosis Code F31.0Bipolar disorder, current episode hypomanic
ICD-10-CM Codes›F01–F99›F30-F39›F31
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 154
- Chronic Condition
F31.0 is a billable ICD-10-CM diagnosis code for bipolar disorder, current episode hypomanic. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 885. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 293 closely related codes. Coders also document this condition as bipolar I disorder, current episode hypomanic. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bipolar and related disorders.
For Medicare Advantage risk adjustment, F31.0 maps to CMS-HCC Category 154 (Bipolar Disorders without Psychosis) under the V28 model, adding a risk factor of about 0.351 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
F31.0 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.
- Bipolar I disorder, current episode hypomanic
- Bipolar I disorder, most recent episode hypomanic
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to F31.0: its own notes plus those printed at F31 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.
- bipolar I disorder
- bipolar type I disorder
- manic-depressive illness
- manic-depressive psychosis
- manic-depressive reaction
- seasonal bipolar disorder
- 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.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name F31.0, its category, or a range that includes it.
Excludes1 4
These codes carry an Excludes1 note naming F31.0: they are not reported together with it, unless the two conditions are unrelated.
- F30 Manic episodebipolar disorder (F31.-) names F31.-, which includes this code
- F32 Depressive episodebipolar disorder (F31.-) names F31.-, which includes this code
- F33 Major depressive disorder, recurrentbipolar disorder (F31.-) names F31.-, which includes this code
- R40.1 Stupordepressive stupor (F31.-, F32.-, F33.-) names F31.-, which includes this code
Excludes2 7
These codes carry an Excludes2 note naming F31.0: its condition is not part of those codes, and both may be reported when the patient has both.
- F44.2 Dissociative stupormanic stupor (F30, F31) names F31, which includes this code
- F63.0 Pathological gamblingexcessive gambling by manic patients (F30, F31) names F31, which includes this code
- F63.2 Kleptomaniadepressive disorder with stealing (F31.-, F32.-, F33.-) names F31.-, which includes this code
- F06.3 Mood disorder due to known physiological condition
- F90 Attention-deficit hyperactivity disorders
- F91 Conduct disorders
- 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;
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Bipolar Disorder
a major affective disorder marked by severe mood swings (manic or major depressive episodes) and a tendency to remission and recurrence.
Patient EducationClinical
Bipolar Disorder
Bipolar disorder is a mood disorder that can cause intense mood swings:
The full article covers:
- What is bipolar disorder?
- What are the types of bipolar disorder?
- What causes bipolar disorder?
- Who is at risk for bipolar disorder?
- What are the symptoms of bipolar disorder?
- How is bipolar disorder diagnosed?
- What are the treatments for bipolar disorder?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert F31.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About F31.0Overview
What is the ICD-10 code for bipolar disorder, current episode hypomanic?
The ICD-10-CM code for bipolar disorder, current episode hypomanic is F31.0 (sometimes written as F310). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is F31.0 (Bipolar disorder) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report bipolar disorder, current episode hypomanic on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does F31.0 group to?
When bipolar disorder, current episode hypomanic is the principal diagnosis on an inpatient stay, it groups to MS-DRG 885 (psychoses), which carries a relative weight of 1.3904. Higher weights mean higher Medicare reimbursement.
Is F31.0 a CC or MCC?
CMS lists F31.0 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 293 closely related codes in its exclusion list.
Can F31.0 be reported with a code from F30?
Not as a rule. The Excludes1 note at F31, which applies to F31.0, lists "bipolar disorder, single manic episode (F30.-)". 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 HCC is F31.0?
F31.0 (bipolar disorder, current episode hypomanic) maps to CMS-HCC Category 154 (Bipolar Disorders without Psychosis), commonly written as HCC 154, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 59 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. In the Part D prescription drug model it maps to RxHCC 131.
Does F31.0 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, F31.0 adds a risk adjustment factor of about 0.351 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.108 to 0.351 depending on the payment segment). A more severe related category (HCC 151, HCC 152, and HCC 153) supersedes it when both are reported. See the full factor table on the HCC 154 category page.
