Medical Billing

Major Depressive Disorder ICD 10 Codes and Billing Guide

June 5, 2026

Major Depressive Disorder, or MDD, is one of the most frequently billed mental health diagnoses in U.S. healthcare. It appears in primary care, behavioral health, psychiatry, OB-GYN, and integrated care settings every single day.

The catch is that MDD is not a single ICD-10 code. It is a structured set of F32 and F33 codes. Each code is based on episode type, severity, psychotic features, and remission status.

Get the code right, and the claim moves cleanly. Get it wrong (or default to unspecified), and the claim invites denials, payer audits, and missed risk adjustment value.

This guide explains each of the F32 and F33 codes used for MDD. It covers the documentation that supports these codes. It lists the most common code pairings. It also highlights pitfalls that can reduce behavioral health revenue. Everything here is general billing education only.

The Two Code Families That Cover MDD

In ICD-10-CM, MDD lives in two main families:

F32 for major depressive disorder, single episode.
F33 for major depressive disorder, recurrent.

Both families capture severity, psychotic features, and remission status. Episode history drives the split between them. F32 applies when this is the patient’s first major depressive episode. F33 applies when the patient has had two or more episodes with at least two months of symptom-free recovery between them.

That two-month rule is a hard requirement. Without it documented, F33 codes are at risk of audit.

Also Read: F32 And F33 ICD-10 Codes For Depression: Billing Guide

Complete MDD ICD-10 Code Cheat Sheet

ICD-10 Code	Description	Common Documentation Cue
F32.0	MDD, single episode, mild	First episode, minimal functional impairment
F32.1	MDD, single episode, moderate	First episode, notable impact on daily function
F32.2	MDD, single episode, severe without psychotic features	First episode, severe symptoms, no hallucinations or delusions
F32.3	MDD, single episode, severe with psychotic features	First episode, severe with hallucinations or delusions
F32.4	MDD, single episode, in partial remission	In the first episode, some symptoms remain
F32.5	MDD, single episode, in full remission	First episode, symptom-free for at least two months
F32.9	MDD, single episode, unspecified	MDD diagnosed, severity not documented
F32.A	Depression, unspecified	“Depression” is documented, but the MDD criteria have not yet been established
F33.0	MDD, recurrent, mild	Two or more episodes, current episode mild
F33.1	MDD, recurrent, moderate	Two or more episodes, current episode moderate
F33.2	MDD, recurrent, severe without psychotic features	Recurrent, severe, no psychosis
F33.3	MDD, recurrent, severe with psychotic features	Recurrent, severe, with hallucinations or delusions
F33.40	MDD, recurrent, in remission, unspecified	Recurrent, remission status not specified
F33.41	MDD, recurrent, in partial remission	Recurrent, some symptoms remain
F33.42	MDD, recurrent, in full remission	Recurrent, symptom-free for at least two months
F33.8	Other recurrent depressive disorders	Recurrent depression not fitting standard severity buckets
F33.9	MDD, recurrent, unspecified	Recurrent MDD confirmed, severity not documented

A couple of important notes on this table:

Codes F32.6, F32.7, and F32.8 do not exist in ICD-10-CM. Selection skips from F32.5 directly to F32.81 (premenstrual dysphoric disorder, which is not MDD) and F32.9.
81 is Premenstrual Dysphoric Disorder, not MDD. It appears in the F32 chapter, but you should not confuse it with major depressive disorder.

F32: MDD, Single Episode

F32 codes apply only when the patient is in their first documented major depressive episode. Severity is the fourth character.

Mild (F32.0): Minimum symptom count, limited functional impact.
Moderate (F32.1): Notable symptoms, clear interference with work or relationships.
Severe without psychotic features (F32.2): Significant symptoms, no psychosis.
Severe with psychotic features (F32.3): Severe symptoms plus hallucinations or delusions.
Partial remission (F32.4): Some symptoms still present, criteria no longer fully met.
Full remission (F32.5): Symptom-free for at least two months.
Unspecified (F32.9): MDD diagnosed but severity not documented.

F32.A vs F32.9: The Most Common Mistake

These two codes look similar but mean very different things:

A is depression, unspecified. Use it when the chart says “depression.” Still, the documentation does not yet satisfy all MDD criteria, or we cannot determine the episode type. Common in emergency departments and first encounters.
9 is MDD, single episode, unspecified. Use it when you confirm MDD, but you have not documented the severity.

Some commercial payers automatically flag F32—a after the second claim as a potential documentation gap. Once the clinical picture is clearer, the code should usually shift to F32.0 through F32.5 or to F33.x.

F33: MDD, Recurrent

F33 codes parallel the F32 severity structure but require documented episode history—the hard rule: at least two months of symptom-free recovery between episodes.

0 mild, F33.1 moderate, F33.2 severe without psychotic features, F33.3 severe with psychotic features.
40 recurrent in remission, unspecified status.
41 recurrent in partial remission.
42 recurrent in full remission.
8 for other recurrent depressive disorders.
9 for recurrent MDD with severity unspecified.

When a patient improves and treatment continues, switch from active episode codes to F33.4x remission codes. This change supports continued medication management and therapy services for payers.

Single Episode vs Recurrent: Quick Comparison

Factor	F32 (Single Episode)	F33 (Recurrent)
Episode requirement	First major depressive episode	Two or more episodes with a two-month symptom-free interval
Severity codes	F32.0 to F32.3	F33.0 to F33.3
Remission codes	F32.4 (partial), F32.5 (full)	F33.40 (unspecified), F33.41 (partial), F33.42 (full)
Documentation cue	“First episode,” “initial onset”	“Recurrent,” “history of prior episodes.”
Common audit issue	Defaulting to F32.9 without severity	Using F33 without prior episode documentation
Risk adjustment value	Moderate	Higher when documented accurately

MDD With Anxious Distress

The DSM-5 includes “with anxious distress” as an MDD specifier, but ICD-10-CM does not have a single combined code. The standard approach is to code both:

The appropriate F32.x or F33.x code for the MDD.
8 (other specified anxiety disorders) or F41.9 (anxiety disorder, unspecified) for the anxiety component.
When symptoms link to a clear stressor, F43.23 may be more accurate.
F43.23 is adjustment disorder with mixed anxiety and depressed mood.
It may fit better than using F32 or F33 plus F41. x.

MDD With Psychotic Features

F32.3 and F33.3 are reserved for cases where hallucinations or delusions are present during the depressive episode. Documentation must clearly state the psychotic features.

It must describe their content as mood-congruent or mood-incongruent. It must link them to the depressive episode. Vague phrases like “appears withdrawn” do not justify these codes.

Common MDD Comorbidities and Pairings

MDD rarely shows up alone. Common code pairings include:

Anxiety disorders (F41.x) for documented co-occurring anxiety.
When documentation notes suicidal ideation (R45.851), clinicians report it alongside the MDD code.
Clinicians clinically address both conditions in cases of substance use disorders (F10 to F19).
Document depression in patients with chronic conditions that affect care and code Type 2 diabetes (E11.-).
Postpartum context: MDD with postpartum onset still uses F32 or F33 codes, based on severity. F53.0 captures puerperal depression specifically.

Capturing comorbidities accurately supports care planning and improves HCC and risk adjustment under Medicare Advantage and value-based contracts.

Also Read: Top 10 Medical Billing Companies in the USA

Documentation Must-Haves for Clean MDD Claims

The cleanest MDD claims share a few common documentation habits:

Clear statement of episode type (first or recurrent).
For F33 codes, document prior episode dates and the symptom-free interval.
Severity supported by clinical findings, PHQ-9 score, and functional impact.
Specific symptoms documented (depressed mood, anhedonia, sleep, appetite, energy, concentration, etc.).
Functional effect on work, school, relationships, or self-care.
Clinicians clearly note psychotic features (present or absent) for severe cases.
Remission status with duration when applicable.
Linked CPT codes that match medical necessity for the diagnosis level.

A good note tells the story behind the claim, so an auditor who reads it understands exactly why the coder selected the code.

Common Coding Pitfalls That Trigger Denials

At Zee Medical Billing LLC, we often see the same documentation gaps drive MDD-related denials and audit flags:

Defaulting to F32.9 or F33.9 when severity is documented elsewhere in the chart.
Using F33 codes without documenting prior episodes or the two-month interval.
Confusing F32.A with F32.9 on early encounters.
Coding MDD when documentation actually supports adjustment disorder (F43.x) or bipolar depression (F31.x).
Missing the suicidal ideation pairing (R45.851) when documented.
Forgetting to update from active episode codes to remission codes when the patient stabilizes.
Using F32.81 (PMDD) for general depressive episodes.
Skip anxiety pairing codes when documentation includes “with anxious distress.”

Most of these come down to documentation depth and provider-coder communication, not code knowledge alone.

FAQs

What is the ICD-10 code for major depressive disorder?

MDD falls under two ICD-10-CM families: F32 (single episode) and F33 (recurrent). The most common MDD codes are F32.1 (single episode, moderate) and F33.1 (recurrent, moderate).

Other common codes are F32.9 (single episode, unspecified) and F32.0 (single episode, mild). The right code depends on the documented episode type, severity, presence of psychotic features, and remission status. Always prefer specific codes over unspecified ones when the chart supports them.

What is the difference between F32.9 and F32.A?

F32.9 means major depressive disorder, single episode, unspecified severity. It is used when MDD is confirmed, but the chart does not document mild, moderate, or severe. F32.A means depression, unspecified, and is used when the chart says “depression” without enough detail to confirm MDD or determine episode type. F32.A is common at emergency or initial encounters, while F32.9 applies once MDD is established without severity. Mixing these up is the single most common MDD coding mistake.

When should I use F33 instead of F32?

Use F33 codes when the patient has had at least two major depressive episodes.

There must be at least two months of full symptom-free recovery between episodes. The documentation must support that history, including the timing of the prior episode and the recovery interval. Without that, F32 codes (single episode) remain the appropriate choice. Coding recurrent MDD without noting past episodes is a common reason for payer audits in behavioral health.

What is the ICD-10 code for major depressive disorder with anxiety?

ICD-10-CM does not include a single combined code for MDD with anxiety. The standard approach is to code the MDD with the appropriate F32.x or F33.x code and add an anxiety code such as F41.9 (anxiety disorder, unspecified) or F41.8 for documented anxious distress. When the depressive and anxiety symptoms are tied to an identifiable stressor, F43.23 (adjustment disorder with mixed anxiety and depressed mood) may be a more accurate single code instead of the combination.

How do I code MDD in remission?

For single-episode MDD in remission, use F32.4 (partial) or F32.5 (full). For recurrent MDD, use F33.41 (partial), F33.42 (full), or F33.40 (in remission, unspecified). Documentation should reflect the current symptom status and the duration of symptom-free time. Coding remission accurately matters because it justifies ongoing treatment, medication management, and follow-up visits while showing payers the patient is being actively monitored and not just labeled.

Conclusion

MDD coding in ICD-10-CM rewards specificity. The system is built to capture episode type, severity, psychotic features, and remission status, and payers increasingly expect those details on the claim. Defaulting to F32.9 or F33.9 across every encounter leaves money on the table and raises audit risk.

Key takeaways:

Use F32 for single episodes and F33 for recurrent MDD with documented two-month intervals.
Match severity to documented clinical findings and PHQ-9 scores when available.
Know the F32. A vs F32.9 difference and use each correctly.
Pair MDD with F41. x for anxious distress, R45.851 for suicidal ideation, and relevant comorbidities.
Update to remission codes (F32.4, F32.5, F33.41, F33.42, F33.40) when the patient stabilizes.
Document episode history, severity, symptoms, function, and treatment in every note.

Strong documentation habits and accurate MDD coding lead directly to cleaner claims, better risk adjustment, and a stronger behavioral health revenue cycle.

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