F31.31: Bipolar disorder, current episode depressed, mild

F31.31, bipolar disorder, current episode depressed, mild, is listed as a covered diagnosis in 11 Medicare billing and coding articles that apply to 22 HCPCS Level II codes, including G0410 (Group psychotherapy other than of a multiple-family group…), G0411 (Interactive group psychotherapy, in a partial…), G0129 (Occupational therapy services requiring the skills of a…). The articles come from 6 Medicare contractors. A listed diagnosis supports medical necessity only; coverage still depends on the LCD's criteria and on documentation in the medical record.

HCPCS Level II codes with F31.31 as a covered diagnosis

CodeDescriptionMedicare coverageDMEPOS fee 2026 (state range)Articles listing it
G0410Group psychotherapy other than of a multiple-family group, in a partial hospitalization or intensive outpatient setting, approximately 45 to 50 minutesCarrier judgment—5
G0411Interactive group psychotherapy, in a partial hospitalization or intensive outpatient setting, approximately 45 to 50 minutesCarrier judgment—5
G0129Occupational therapy services requiring the skills of a qualified occupational therapist, furnished as a component of a partial hospitalization or intensive outpatient treatment program, per session (45 minutes or more)Carrier judgment—3
G0176Activity therapy, such as music, dance, art or play therapies not for recreation, related to the care and treatment of patient's disabling mental health problems, per session (45 minutes or more)Special coverage instructions apply—3
G0177Training and educational services related to the care and treatment of patient's disabling mental health problems per session (45 minutes or more)Special coverage instructions apply—3
G0017Psychotherapy for crisis furnished in an applicable site of service (any place of service at which the non-facility rate for psychotherapy for crisis services applies, other than the office setting); first 60 minutesCarrier judgment—4
G0018Psychotherapy for crisis furnished in an applicable site of service (any place of service at which the non-facility rate for psychotherapy for crisis services applies, other than the office setting); each additional 30 minutes (list separately in addition to code for primary service)Carrier judgment—4
G0451Development testing, with interpretation and report, per standardized instrument formCarrier judgment—3
G0560Safety planning interventions, each 20 minutes personally performed by the billing practitioner, including assisting the patient in the identification of the following personalized elements of a safety plan: recognizing warning signs of an impending suicidal or substance use-related crisis; employing internal coping strategies; utilizing social contacts and social settings as a means of distraction from suicidal thoughts or risky substance use; utilizing family members, significant others, caregivers, and/or friends to help resolve the crisis; contacting mental health or substance use disorder professionals or agencies; and making the environment safeCarrier judgment—2
G0323Care management services for behavioral health conditions, at least 20 minutes of clinical psychologist, clinical social worker, mental health counselor, or marriage and family therapist time, per calendar month. (these services include the following required elements: initial assessment or follow-up monitoring, including the use of applicable validated rating scales; behavioral health care planning in relation to behavioral/psychiatric health problems, including revision for patients who are not progressing or whose status changes; facilitating and coordinating treatment such as psychotherapy, coordination with and/or referral to physicians and practitioners who are authorized by medicare to prescribe medications and furnish e/m services, counseling and/or psychiatric consultation; and continuity of care with a designated member of the care team)Carrier judgment—1
G0409Social work and psychological services, directly relating to and/or furthering the patient's rehabilitation goals, each 15 minutes, face-to-face; individual (services provided by a corf-qualified social worker or psychologist in a corf)Carrier judgment—1
G0570Care management services for behavioral health conditions, directed by a physician or other qualified health care professional, per calendar month, with the following required elements: initial assessment or follow-up monitoring, including the use of applicable validated rating scales, behavioral health care planning in relation to behavioral/psychiatric health problems, including revision for patients who are not progressing or whose status changes, facilitating and coordinating treatment such as psychotherapy, pharmacotherapy, counseling and/or psychiatric consultation, and continuity of care with a designated member of the care team (list separately in addition to advanced primary care management code)Carrier judgment—1
G0152Services performed by a qualified occupational therapist in the home health or hospice setting, each 15 minutesCarrier judgment—1
G0155Services of clinical social worker in home health or hospice settings, each 15 minutesCarrier judgment—1
G0156Services of home health/hospice aide in home health or hospice settings, each 15 minutesCarrier judgment—1
G0299Direct skilled nursing services of a registered nurse (rn) in the home health or hospice setting, each 15 minutesCarrier judgment—1
G0300Direct skilled nursing services of a licensed practical nurse (lpn) in the home health or hospice setting, each 15 minutesCarrier judgment—1
G0480Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms (any type, single or tandem and excluding immunoassays (e.g., ia, eia, elisa, emit, fpia) and enzymatic methods (e.g., alcohol dehydrogenase)), (2) stable isotope or other universally recognized internal standards in all samples (e.g., to control for matrix effects, interferences and variations in signal strength), and (3) method or drug-specific calibration and matrix-matched quality control material (e.g., to control for instrument variations and mass spectral drift); qualitative or quantitative, all sources, includes specimen validity testing, per day; 1-7 drug class(es), including metabolite(s) if performedCarrier judgment—1
G0483Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms (any type, single or tandem and excluding immunoassays (e.g., ia, eia, elisa, emit, fpia) and enzymatic methods (e.g., alcohol dehydrogenase)), (2) stable isotope or other universally recognized internal standards in all samples (e.g., to control for matrix effects, interferences and variations in signal strength), and (3) method or drug-specific calibration and matrix-matched quality control material (e.g., to control for instrument variations and mass spectral drift); qualitative or quantitative, all sources, includes specimen validity testing, per day; 22 or more drug class(es), including metabolite(s) if performedCarrier judgment—1
G0482Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms (any type, single or tandem and excluding immunoassays (e.g., ia, eia, elisa, emit, fpia) and enzymatic methods (e.g., alcohol dehydrogenase)), (2) stable isotope or other universally recognized internal standards in all samples (e.g., to control for matrix effects, interferences and variations in signal strength), and (3) method or drug-specific calibration and matrix-matched quality control material (e.g., to control for instrument variations and mass spectral drift); qualitative or quantitative, all sources, includes specimen validity testing, per day; 15-21 drug class(es), including metabolite(s) if performedCarrier judgment—1
G0481Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms (any type, single or tandem and excluding immunoassays (e.g., ia, eia, elisa, emit, fpia) and enzymatic methods (e.g., alcohol dehydrogenase)), (2) stable isotope or other universally recognized internal standards in all samples (e.g., to control for matrix effects, interferences and variations in signal strength), and (3) method or drug-specific calibration and matrix-matched quality control material (e.g., to control for instrument variations and mass spectral drift); qualitative or quantitative, all sources, includes specimen validity testing, per day; 8-14 drug class(es), including metabolite(s) if performedCarrier judgment—1
G0659Drug test(s), definitive, utilizing drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including but not limited to gc/ms (any type, single or tandem) and lc/ms (any type, single or tandem), excluding immunoassays (e.g., ia, eia, elisa, emit, fpia) and enzymatic methods (e.g., alcohol dehydrogenase), performed without method or drug-specific calibration, without matrix-matched quality control material, or without use of stable isotope or other universally recognized internal standard(s) for each drug, drug metabolite or drug class per specimen; qualitative or quantitative, all sources, includes specimen validity testing, per day, any number of drug classesCarrier judgment—1

Medicare policy articles listing F31.31

A diagnosis listed as covered in a billing and coding article supports medical necessity for the article's codes; it does not guarantee payment. Coverage depends on the LCD's criteria, the contractor's jurisdiction and documentation in the medical record.

Other F31 diagnoses (Bipolar disorder)

Frequently asked questions

Does Medicare cover F31.31 (Bipolar disorder, current episode depressed, mild)?

Medicare covers items and services, not diagnoses. 11 Medicare billing and coding articles list F31.31 as a covered diagnosis for 22 HCPCS Level II codes: the diagnosis can support medical necessity for those codes, but payment still depends on the LCD's coverage criteria and the medical record.

Which HCPCS codes can be billed with ICD-10 F31.31?

The Level II codes from the policies most specific to this diagnosis are G0410 (Group psychotherapy other than of a multiple-family group…, 5 articles); G0411 (Interactive group psychotherapy, in a partial…, 5 articles); G0129 (Occupational therapy services requiring the skills of a…, 3 articles); G0176 (Activity therapy, such as music, dance, art or play…, 3 articles); G0177 (Training and educational services related to the care and…, 3 articles). Code choice depends on the item supplied; check each code's descriptor.

Which Medicare policy articles list F31.31?

A56850 (Billing and Coding: Psychiatric Partial Hospitalization Programs); A56685 (Billing and Coding: Partial Hospitalization Programs); A57053 (Billing and Coding: Psychiatric Partial Hospitalization Programs), and 8 more articles.

What is ICD-10-CM code F31.31?

F31.31 is the ICD-10-CM code for bipolar disorder, current episode depressed, mild, in category F31 (Bipolar disorder), chapter 5: Mental, behavioral and neurodevelopmental disorders.

Next steps

Sources: CMS Medicare Coverage Database billing and coding articles (covered ICD-10 code lists and HCPCS links); ICD-10-CM FY2026; CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule 2026 (non-rural state fees). Not billing or legal advice.

Chapter 5: Mental, behavioral and neurodevelopmental disorders · All diagnoses · HCPCS lookup