Skip to content
HCC Buddy home

F31.71 ICD-10-CM Code: Bipolar disorder, in partial remission, most recent episode hypomanic

F31.71 maps to CMS-HCC V28 154. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · free HCC coding tools

ICD-10-CM Code View

HCC Buddy Code Card

Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.

Code lookupF31.71

FY 2026 Apr update / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Mood [affective] disorders (F30-F39)

F31.71

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Bipolar disorder, in partial remission, most recent episode hypomanic

Bipolar disorder that is partially in remission following a hypomanic episode, meaning some symptoms may still be present but are significantly improved.

Buddy the Bee presenting code insight

Buddy Insight

Bipolar disorder in partial remission with the most recent episode being hypomanic indicates the patient is recovering from a hypomanic episode but still has some residual symptoms.

OverviewRisk ModelsCode BookDocumentationAuditNotesEdition comparison

CMS-HCC V28

HCC 154

Coefficient HCC 154: 0.351 (Community Non-Dual Aged (CNA))

CMS-HCC V24

Historical

Historical

Not used for CY2026 payment

ACA/HHS

Context needed

HCC 088

Coefficient needs member context

ESRD/PACE

Context needed

HCC 59

Coefficient needs member context

RXHCC

HCC 131

Code-level coefficient reference

Code Book Path

Official
F31Bipolar disorderF31.7Bipolar disorder, currently in remissionF31.71Bipolar disorder, in partial remission, most recent episode hypomanic

Inclusion Terms

Official

No inclusion terms are included in this display for F31.71. Check the code and parent instructions in the Code Book.

Excludes 2

Official
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)Inherited from F01-F99, F31
  • cyclothymia (F34.0)Inherited from F01-F99, F31

Related Codes

Official
F31.70Bipolar disorder, currently in remission, most recent episode unspecifiedF31.72Bipolar disorder, in full remission, most recent episode hypomanicF31.73Bipolar disorder, in partial remission, most recent episode manicF31.74Bipolar disorder, in full remission, most recent episode manicF31.75Bipolar disorder, in partial remission, most recent episode depressed

Includes

Official
  • disorders of psychological developmentInherited from F01-F99, F31
  • bipolar I disorderInherited from F01-F99, F31
  • bipolar type I disorderInherited from F01-F99, F31
  • manic-depressive illnessInherited from F01-F99, F31
  • manic-depressive psychosisInherited from F01-F99, F31
  • manic-depressive reactionInherited from F01-F99, F31
  • seasonal bipolar disorderInherited from F01-F99, F31

Excludes 1

Official
  • bipolar disorder, single manic episode (F30.-)Inherited from F31
  • major depressive disorder, single episode (F32.-)Inherited from F31
  • major depressive disorder, recurrent (F33.-)Inherited from F31

Code First

Official

No Code First sequencing instructions are included in this display for F31.71. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for F31.71. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for F31.71. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance
Confirmed bipolar disorder diagnosis
Most recent episode documented as hypomanic
Current status documented as partial remission with some residual symptoms described
Residual symptoms specified (e.g., mild sleep disturbance, slight irritability)

MEAT Support

HCC Buddy guidance
Confirmed bipolar disorder diagnosis
Most recent episode documented as hypomanic
Current status documented as partial remission with some residual symptoms described
Residual symptoms specified (e.g., mild sleep disturbance, slight irritability)

Audit Caution

HCC Buddy guidance
Coding as active hypomania (F31.0) when symptoms are residual rather than full episode
Using full remission (F31.72) when the provider documents ongoing residual symptoms
Not distinguishing between hypomanic and manic episodes for the most recent episode specification
Failing to code the bipolar disorder during follow-up visits when it is being actively managed

Common Mistakes

HCC Buddy guidance
F31.72 — Bipolar disorder, full remission, most recent episode hypomanic: Complete symptom resolution versus partial
F31.0 — Bipolar disorder, current episode hypomanic: Active hypomania, not in remission
F31.70 — Bipolar disorder, remission, unspecified episode: Less specific about episode type
F31.73 — Bipolar disorder, partial remission, most recent manic: Most recent was full mania, not hypomania

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is F31.71 an HCC code?

Yes. F31.71 (Bipolar disorder, in partial remission, most recent episode hypomanic) maps to HCC 154, Bipolar Disorders without Psychosis under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.351. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: F31.71 is billable and maps to V28 HCC 154, Bipolar Disorders without Psychosis. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code
F31.71
Description
Bipolar disorder, in partial remission, most recent episode hypomanic
HCC (V28)
HCC 154 — Bipolar Disorders without Psychosis
RAF reference coefficient
0.351
Billable
Yes
Payment year
2026

HCC Category Mapping

V28HCC 154, Bipolar Disorders without Psychosis
0.351
RxHCCHCC 131, Bipolar Disorders
Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work F31.71 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for F31.71

For F31.71, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

  • MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
  • EEvaluate: test results, medication response, or physical findings reviewed by the provider
  • AAssess: explicit mention in the assessment or plan with acknowledgment of status
  • TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Coder workflow notes

Get the V28 mapping + MEAT cheat sheet

One printable reference: check representative V28 mappings and the documentation reminders your note needs. Free, no card.

Free PDF. No card. Unsubscribe anytime.

What This Code Means

F31.71 is the ICD-10-CM diagnosis code for bipolar disorder, in partial remission, most recent episode hypomanic. Bipolar disorder that is partially in remission following a hypomanic episode, meaning some symptoms may still be present but are significantly improved. F31.71 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering mood [affective] disorders (f30-f39).

Under the CMS-HCC V28 risk adjustment model, F31.71 maps to Bipolar Disorders without Psychosis (HCC 154) with a source-labeled community, non-dual, aged reference coefficient of 0.351. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

Document must specify 'partial remission' status and confirm the most recent episode was hypomanic. For F31.71, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for F31.71 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

  • •Document must specify 'partial remission' status and confirm the most recent episode was hypomanic
  • •Distinguish from full remission (F31.81) which indicates complete symptom resolution

Clinical Significance

Bipolar disorder in partial remission with the most recent episode being hypomanic indicates the patient is recovering from a hypomanic episode but still has some residual symptoms. Partial remission status is important because it signals ongoing instability and higher relapse risk compared to full remission. This distinction affects monitoring frequency and medication management decisions.

Documentation Requirements

  • ✓Confirmed bipolar disorder diagnosis
  • ✓Most recent episode documented as hypomanic
  • ✓Current status documented as partial remission with some residual symptoms described
  • ✓Residual symptoms specified (e.g., mild sleep disturbance, slight irritability)
  • ✓Maintenance medication regimen documented
  • ✓Follow-up monitoring plan

Commonly Confused Codes

  • •F31.72: Bipolar disorder, full remission, most recent episode hypomanic: Complete symptom resolution versus partial
  • •F31.0: Bipolar disorder, current episode hypomanic: Active hypomania, not in remission
  • •F31.70: Bipolar disorder, remission, unspecified episode: Less specific about episode type
  • •F31.73: Bipolar disorder, partial remission, most recent manic: Most recent was full mania, not hypomania

Child Codes

F31.70Bipolar disorder, currently in remission, most recent episode unspecified
F31.71Bipolar disorder, in partial remission, most recent episode hypomanic
HCC 154
F31.72Bipolar disorder, in full remission, most recent episode hypomanic
F31.73Bipolar disorder, in partial remission, most recent episode manic
HCC 154
F31.74Bipolar disorder, in full remission, most recent episode manic
F31.75Bipolar disorder, in partial remission, most recent episode depressed
HCC 154
F31.76Bipolar disorder, in full remission, most recent episode depressed
F31.77Bipolar disorder, in partial remission, most recent episode mixed
HCC 154
F31.78Bipolar disorder, in full remission, most recent episode mixed

Code Hierarchy

└F31Bipolar disorder└F31.7Bipolar disorder, currently in remission└F31.71Bipolar disorder, in partial remission, most recent episode hypomanic
└F31.71Bipolar disorder, in partial remission, most recent episode hypomanic

Also searched as

  • F31 71
  • F3171

For F31.71, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

F31.71 maps to CMS-HCC V28 category 154, Bipolar Disorders without Psychosis. See the ICD-10 to HCC mapping hub for how the V28 crosswalk works. The mapping identifies a payment HCC category for F31.71. Review its source-labeled HCC coefficient above, check the RAF Calculator with complete member context for CMS-HCC V28 PY2026, and confirm the documentation the chart needs before the code is submitted. HCC Buddy shows no RAF score unless every required source and calculation check passes.

Work F31.71 in HCC Buddy

Open F31.71 in the Code Book for the full Index-to-Tabular path, MEAT checklist, and V28 HCC mapping, or in the Encoder to code from a keyword search. Pro includes 7 days to try everything, no card required.

Open in Code BookOpen in EncoderStart Pro