ICD-10 Codes for Depression: F32.9, F33.9, and Other Common Codes

A note can say “depression” without telling the whole coding story.

One provider may document depression without naming a specific disorder. Another may diagnose major depressive disorder and identify a single episode. A third may document recurrent MDD and include the severity. Those assessments may describe related clinical concerns, but they do not lead to the same ICD-10-CM code.

F32.9 and F33.9 are often confused because the difference comes down to how the depression is documented. If the provider identifies major depressive disorder as a single episode, the diagnosis is coded from the F32 category. When the record shows that the disorder is recurrent, the F33 category is used instead. Reviewing this detail in the chart helps avoid choosing a code that does not match the provider’s diagnosis.

For a quick reference:

The rest of the F32 and F33 categories become more specific when the assessment includes information such as severity or remission.

Depression ICD-10-CM Codes at a Glance

Code	ICD-10-CM description	What it indicates
F32.A	Depression, unspecified	Depression is documented without establishing MDD
F32.0	MDD, single episode, mild	Mild severity
F32.1	MDD, single episode, moderate	Moderate severity
F32.2	MDD, single episode, severe, without psychotic features	Severe episode without psychotic features
F32.3	MDD, single episode, severe, with psychotic features	Severe episode with psychotic features
F32.4	MDD, single episode, in partial remission	Partial remission
F32.5	MDD, single episode, in full remission	Full remission
F32.9	MDD, single episode, unspecified	Episode is single; other details are unspecified
F33.0	MDD, recurrent, mild	Mild severity
F33.1	MDD, recurrent, moderate	Moderate severity
F33.2	MDD, recurrent, severe, without psychotic features	Severe recurrence without psychotic features
F33.3	MDD, recurrent, severe, with psychotic symptoms	Severe recurrence with psychotic symptoms
F33.41	MDD, recurrent, in partial remission	Partial remission
F33.42	MDD, recurrent, in full remission	Full remission
F33.9	MDD, recurrent, unspecified	Recurrent MDD; other details are unspecified

These codes are included in the FY2027 ICD-10-CM code set, which applies to encounters from October 1, 2026, through September 30, 2027.

The Difference Between F32.9 and F33.9

The difference between F32.9 and F33.9 comes down to the patient’s episode history as documented by the provider.

F32.9 belongs to the single-episode MDD category.

F33.9 belongs to the recurrent MDD category.

Consider these two assessments:

Assessment:
Major depressive disorder, single episode, unspecified
→ F32.9

Assessment:
Major depressive disorder, recurrent, unspecified
→ F33.9

Neither code describes a particular severity. The deciding detail here is whether the provider has documented the disorder as single episode or recurrent.

That makes “recurrent” more than a descriptive word in the note, it changes the category in which the diagnosis is reported. If recurrence is documented, the reviewer should look to F33 rather than treating the diagnosis as part of the single-episode F32 group.

If the assessment also contains severity or remission information, that needs to be considered before using the unspecified option.

Why F32.A Is Not the Same as F32.9

This is the point where the actual wording of the diagnosis becomes especially important.

A provider who writes “depression” has not necessarily diagnosed major depressive disorder. F32.A is available for depression, unspecified. F32.9, on the other hand, specifically identifies major depressive disorder, single episode, unspecified.

The reason for the separate F32.A code goes back to a coding problem identified by CDC/NCHS. Before F32.A was created, “Depression NOS” could default to F32.9. NCHS noted that this could incorrectly classify unspecified depression as major depressive disorder. The proposed new code gave unspecified depression its own classification instead.

That difference can be seen in the chart:

Assessment: Depression

The diagnosis remains unspecified depression. Nothing in that wording establishes single-episode MDD.

Assessment: Major depressive disorder, single episode, unspecified

Now the provider has identified MDD and its episode classification, which supports F32.9. Symptoms elsewhere in the note should not be used to quietly change one diagnosis into the other.

What Should a Provider’s Assessment Clarify?

The assessment does not need to become a long psychiatric narrative for the sake of coding. When these characteristics have been clinically established, however, documenting them directly can make the diagnosis much easier to interpret.

For example, “MDD” tells the coding team more than “depression,” while “MDD, recurrent, moderate” provides still more information. The provider should document what is clinically established; the coding process should not manufacture missing detail simply to reach a more specific code.

Depression Symptoms Are Not the Same as an MDD Diagnosis

A chart may contain plenty of information about depressive symptoms without containing a formal diagnosis of major depressive disorder.

The patient may describe fatigue, sleep disturbance, low mood, poor concentration or loss of interest. The findings are pertinent to the provider’s assessment; however, the presence of several symptoms does not allow a coder to independently diagnose MDD.

Imagine a note with a detailed symptom discussion followed by an assessment that simply says “depression.” The symptom list does not turn that assessment into single-episode MDD.

When the diagnosis is already documented in clear terms, the code should follow that wording. For example, if the provider describes the condition as recurrent major depressive disorder with moderate severity, the code should capture both details. A long list of symptoms elsewhere in the note does not replace or override the diagnosis the provider has documented.

Clinical findings support the provider’s evaluation. The diagnosis reported for coding purposes still has to come from the provider’s documented assessment.

How the F32 Category Is Organized

The F32 category is centered on single-episode major depressive disorder. The last digit or digits then provide additional information about the condition documented by the provider.

Single-Episode MDD Codes

Code	Diagnosis
F32.0	Single episode, mild
F32.1	Single episode, moderate
F32.2	Single episode, severe without psychotic features
F32.3	Single episode, severe with psychotic features
F32.4	Single episode, in partial remission
F32.5	Single episode, in full remission
F32.9	Single episode, unspecified

When the provider documents a specific severity, that detail should be reflected in the code. For example, major depressive disorder, single episode, moderate supports F32.1, rather than the unspecified F32.9. A provider who records full remission also provides information that would not be captured by the “not otherwise specified” option.

How the F33 Category Is Organized

The F33 category covers recurrent major depressive disorder. It follows a similar pattern to F32, but the episode history has already been established as recurrent.

Recurrent MDD Codes

Code	Diagnosis
F33.0	Recurrent, mild
F33.1	Recurrent, moderate
F33.2	Recurrent, severe without psychotic features
F33.3	Recurrent, severe with psychotic symptoms
F33.41	Recurrent, in partial remission
F33.42	Recurrent, in full remission
F33.9	Recurrent, unspecified

The severity distinction matters here. F33.0 means recurrent MDD documented as mild; F33.1 means recurrent MDD documented as moderate. They are not interchangeable.

For example:

Major depressive disorder, recurrent, mild → F33.0

Major depressive disorder, recurrent, moderate → F33.1

F33.9 may be appropriate if the provider notes recurrent MDD but does not provide the extra detail needed for those more specific classifications.

Common Documentation Scenarios Providers May Encounter

A few short chart examples show how the diagnosis can change even when the general subject of the visit remains the same.

Where Depression Coding Can Go Wrong

Most mistakes in this area are not caused by an obscure code. They often come from adding something to the diagnosis that the provider did not actually document—or overlooking something that was already there.

Turning “Depression” Into MDD

“Depression” is not automatically synonymous with major depressive disorder. If the provider has not made that diagnosis, the coding process should not create it from the patient’s symptoms.

Losing the Episode History

A diagnosis of MDD still leaves an important question: is the episode single or recurrent?

If the provider has documented recurrent MDD, using an F32 code would miss a defining part of the diagnosis.

Ignoring Documented Specificity

The word “unspecified” should prompt a documentation review, not an automatic assumption that it is the correct choice.

If the provider has clearly documented moderate severity, for instance, F33.9 does not communicate that information. The same issue can arise with remission or psychotic features.

At the same time, an unspecified code is not inherently a coding error. If the provider has not established the additional detail, the record should not be upgraded through inference.

Trying to Make the Diagnosis More Specific Through Coding

Coding should translate the clinical record, not complete it. A patient’s history might suggest recurrence. A symptom list might appear consistent with a particular severity. Neither circumstance gives the coding team authority to add those elements to the provider’s diagnosis.

When the documentation genuinely needs clarification, the answer is to obtain appropriate clarification from the provider not to make the clinical decision during code selection.

A Better Documentation Approach for Providers

The most useful documentation is often the simplest wording that accurately captures the diagnosis. Clear diagnosis statements also give medical billing and coding teams a better record to work from when preparing and reviewing claims.

Compare:

Depression

with:

Major depressive disorder, recurrent, moderate

That wording gives the coding team three useful details at once: the diagnosis, its recurrent pattern, and the documented severity. When those details reflect the provider’s clinical assessment, the record supports a more precise code.

A remission diagnosis can be stated just as directly:

Major depressive disorder, recurrent, in full remission

And when the provider has not established MDD:

Depression, unspecified

The point is not to make every assessment longer. It is to avoid leaving clinically established information scattered across the note when it can be stated clearly in the assessment.

The provider remains responsible for the diagnosis. Coding staff use that diagnosis to assign the applicable ICD-10-CM classification.

F32.A, F32.9, and F33.9: Quick Comparison

If the assessment says…	Relevant code
Depression, unspecified	F32.A
Major depressive disorder, single episode, unspecified	F32.9
Major depressive disorder, recurrent, unspecified	F33.9
Major depressive disorder, single episode, moderate	F32.1
Major depressive disorder, recurrent, moderate	F33.1
Major depressive disorder, recurrent, in partial remission	F33.41
Major depressive disorder, recurrent, in full remission	F33.42

The table can serve as a quick reference, but the diagnosis in the chart still needs to guide code selection. A mention of “depression” alone does not show whether the provider diagnosed MDD, left the condition unspecified, or documented a recurrent disorder. Those details come from the provider’s assessment.

Are These Depression Codes Current for FY2027?

Yes. The FY2027 ICD-10-CM files include the diagnosis codes discussed here. CMS states that FY2027 applies to patient encounters from October 1, 2026, through September 30, 2027.

That matters for any online coding article or internal reference sheet because ICD-10-CM is updated by fiscal year. A code list without a year attached to it can become unreliable once a new release takes effect.

Are These Depression Codes Current for FY2027?

Yes. The codes covered in this article are included in the FY2027 ICD-10-CM code set. The FY2027 reporting period runs from October 1, 2026, through September 30, 2027.

This is worth checking whenever a practice uses an older coding reference. ICD-10-CM is revised each fiscal year, so a code list that was accurate for an earlier release should not automatically be carried forward.

For FY2027 dates of service, providers should check the current CMS code files and official ICD-10-CM guidance before assigning a diagnosis code. Older or undated code lists can easily lead to mistakes. The CDC/NCHS ICD-10-CM Browser is also helpful for confirming code descriptions and related coding details.

Verification Checklist Before Submitting Claims

Before finalizing any claim that includes a depression diagnosis, walk through these steps:

1. Identify the Documented Diagnosis

Read the provider’s documented diagnosis statement directly. Do not infer or adjust a diagnosis based on symptoms mentioned elsewhere in the clinical note. Code what is explicitly stated.

2. Determine Episode Pattern (for Major Depressive Disorder)

When major depressive disorder is documented, the next step is to determine whether the provider identifies it as a single episode or a recurrent condition. That distinction is important because it guides whether the diagnosis is coded from the F32 or F33 category.

3. Look for Modifying Information

Scan the clinical documentation for descriptors such as mild, moderate, severe, presence of psychotic features, or current remission status. These qualifiers narrow the code selection and should be reflected in your final code choice.

4. Ensure Code-to-Documentation Alignment

Your selected code must match what appears in the medical record. The code should be precise enough to capture stated details but not so specific that it invents details the provider did not document.

Frequently Asked Questions

What is F32.9 in ICD-10-CM?

F32.9 is the ICD-10-CM code for major depressive disorder, single episode, unspecified. The diagnosis has already been identified as MDD and as a single episode; what remains unspecified is the additional detail within that category.

What is F33.9 used for?

F33.9 represents major depressive disorder, recurrent, unspecified. It applies within the recurrent MDD category when the provider has not documented a more specific applicable classification such as mild, moderate, severe, or remission.

Is F32.9 the code for unspecified depression?

No. F32.A is used for depression, unspecified. F32.9 is different because it specifically identifies single-episode major depressive disorder. This distinction is one reason providers should avoid assuming that a general reference to depression automatically means MDD.

What is the ICD-10 code for recurrent moderate MDD?

The code for major depressive disorder, recurrent, moderate is F33.1. For comparison, F33.0 represents recurrent MDD documented as mild, while F33.9 represents recurrent MDD without further specification.

When should F32.1 be used?

F32.1 represents major depressive disorder, single episode, moderate. The provider’s assessment needs to establish both parts of that diagnosis. Moderate severity should not be inferred simply because the patient’s symptoms appear substantial.

Are F32.9 and F33.9 included in FY2027 ICD-10-CM?

Yes. Both codes are included in the FY2027 ICD-10-CM code set. CMS lists the FY2027 encounter period as October 1, 2026, through September 30, 2027.

Final Takeaway

The code is easier to choose once the diagnosis is clear. A chart that says depression does not automatically establish MDD. If the provider has diagnosed MDD, the next question is whether the disorder is single episode or recurrent. From there, documented severity, psychotic features, or remission may narrow the classification further.

when the diagnosis is done right it comes very easy to choose the code

For providers, clear assessment language does not mean writing a longer note for the sake of billing. It means stating the diagnosis at the level the clinical evaluation actually supports.

That gives the coding team something concrete to report and keeps the claim tied to the provider’s clinical judgment rather than assumptions made after the visit.