> ## Documentation Index
> Fetch the complete documentation index at: https://docs.thrizer.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Can I use a specific diagnosis code with Thrizer?
> How diagnosis codes work in Thrizer claims, why support for a code is not a coverage guarantee, and what to do if a code is missing or unrecognized.
## Overview
Thrizer supports many ICD-10 diagnosis codes commonly used in behavioral health and related out-of-network claim processes.
If a diagnosis code is supported in Thrizer, you can use it wherever a diagnosis code is required. That includes clinician client setup, claim submission, and claim documentation. It does **not** mean the diagnosis is clinically correct, that the client’s insurance plan will cover the service, or that the claim will be approved or reimbursed.
You are responsible for selecting the diagnosis code that accurately reflects the client’s clinical care. The insurance carrier determines whether a submitted claim is accepted, denied, applied to deductible, or reimbursed.
## How diagnosis codes work in Thrizer
A diagnosis code helps describe the clinical reason for the service on an insurance claim.
For a charge to be submitted as a claim through Thrizer, the claim generally needs:
* a diagnosis code
* a CPT code structure
* provider information, including a valid NPI
* service date and appointment details
* billed amount
* client insurance information
For OON Pay and Thrizer Pay, claim submission is tied to a successful charge. If the charge does not process successfully, the claim is not submitted.
Diagnosis code support means the code can be used in Thrizer. It is not clinical coding advice and does not guarantee insurance coverage, claim approval, deductible application, or reimbursement.
## Common diagnosis codes clinicians ask about
These are diagnosis codes clinicians commonly ask about. Inclusion here is for orientation only. It is not clinical advice, and it does not indicate that any insurer will accept the code or cover it for a specific service.
| Code | Description |
| ------ | ---------------------------------------------------------------------------- |
| F32.0 | Major depressive disorder, single episode, mild |
| F32.1 | Major depressive disorder, single episode, moderate |
| F32.2 | Major depressive disorder, single episode, severe without psychotic features |
| F32.A | Depression, unspecified |
| F32.9 | Major depressive disorder, single episode, unspecified |
| F33.0 | Major depressive disorder, recurrent, mild |
| F33.1 | Major depressive disorder, recurrent, moderate |
| F33.2 | Major depressive disorder, recurrent severe without psychotic features |
| F33.41 | Major depressive disorder, recurrent, in partial remission |
| F34.1 | Dysthymic disorder |
| F39 | Unspecified mood \[affective] disorder |
| F41.0 | Panic disorder \[episodic paroxysmal anxiety] |
| F41.1 | Generalized anxiety disorder |
| F41.9 | Anxiety disorder, unspecified |
| F42.2 | Mixed obsessional thoughts and acts |
| F43.10 | Post-traumatic stress disorder, unspecified |
| F43.12 | Post-traumatic stress disorder, chronic |
| F43.20 | Adjustment disorder, unspecified |
| F43.21 | Adjustment disorder with depressed mood |
| F43.22 | Adjustment disorder with anxiety |
| F43.23 | Adjustment disorder with mixed anxiety and depressed mood |
| F43.9 | Reaction to severe stress, unspecified |
| F50.01 | Anorexia nervosa, restricting type |
| F50.2 | Bulimia nervosa |
| F60.3 | Borderline personality disorder |
| F84.0 | Autistic disorder |
| F90.0 | Attention-deficit hyperactivity disorder, predominantly inattentive type |
| F90.2 | Attention-deficit hyperactivity disorder, combined type |
| F31.81 | Bipolar II disorder |
| F31.9 | Bipolar disorder, unspecified |
## Supported diagnosis-code families
Thrizer supports many diagnosis codes across behavioral health ICD-10 F-code ranges, along with selected Z-codes that may appear in clinical or administrative use.
| Code family | Examples of included categories |
| ----------- | ---------------------------------------------------------------------------------- |
| F01–F09 | Dementia, delirium, and mental disorders due to known physiological conditions |
| F10–F19 | Substance-related disorders |
| F20–F29 | Schizophrenia spectrum and other psychotic disorders |
| F30–F39 | Mood disorders, including bipolar and depressive disorders |
| F40–F48 | Anxiety, OCD, trauma, stress-related, dissociative, somatic, and related disorders |
| F50–F59 | Eating, sleep, sexual, gender, and behavioral syndromes |
| F60–F69 | Personality and adult behavior disorders |
| F70–F89 | Intellectual disability and developmental disorders |
| F90–F99 | ADHD, conduct, tic, childhood, adolescent, and unspecified mental disorders |
| Z-codes | Selected relationship, counseling, history, and contextual factors |
Do not assume that every possible ICD-10 code in a family is supported. To confirm a specific code, check it in Thrizer or contact support.
## Using more than one diagnosis code
A claim submitted through Thrizer requires at least one ICD-10 diagnosis code. A claim may include more than one diagnosis code when additional codes are clinically appropriate and supported by the claim process.
You select which diagnosis codes to include based on the clinical care delivered. Including more than one diagnosis code does not change how the insurance carrier processes the claim and does not increase the likelihood of approval or reimbursement.
If a specific code or combination is not accepted in the Add Charge form, contact support with the codes and where the issue is occurring.
## If the diagnosis code is not listed here
A diagnosis code may still be usable even if it is not shown in the common-code table above.
If you cannot find the diagnosis code you need, contact Thrizer support with:
* the diagnosis code
* the diagnosis description
* the client or account context, if relevant
* whether the issue is occurring during client setup, charging, or claim submission
Thrizer can review whether the code is supported for use in the claim process.
## What diagnosis-code support does not mean
Diagnosis-code support in Thrizer does not mean:
* the diagnosis is clinically correct for the client
* the diagnosis should be used for a specific service
* the client’s plan covers services for that diagnosis
* the diagnosis establishes medical necessity
* the claim will be approved
* the claim will be reimbursed
* the amount will apply to deductible
* the insurer will accept the diagnosis for a specific CPT code
Those decisions depend on the clinician’s clinical judgment and documentation. They also depend on the client’s insurance plan and the insurance carrier’s claim-processing rules.
## When to wait before charging
If no diagnosis has been assigned yet, wait until the diagnosis is available before submitting an insurance claim.
Claims require diagnosis information. Submitting incomplete claim information can cause claim issues or prevent claim submission.
Add Charge reflects this by disabling OON Pay and Thrizer Pay for clients without a diagnosis on file. If an insurance option was already selected, the form falls back to Self-Pay and shows a warning toast. Self-Pay does not require a diagnosis, so a Self-Pay charge can still be created while the diagnosis is being finalized.
## What to avoid
Avoid choosing a diagnosis code only because it appears more likely to reimburse.
Avoid using a diagnosis code that does not accurately reflect the client’s clinical care.
Avoid treating diagnosis-code support as confirmation that the insurance carrier will accept the claim.
Avoid submitting an insurance claim before the diagnosis, CPT code, provider, and charge details are complete.
## If you can't find a diagnosis code
Thrizer's supported diagnosis codes cover the behavioral health ICD-10 F-code ranges (F01–F99) along with selected Z-codes that commonly appear in out-of-network mental health claims.
If a specific code does not work in your portal or you are unsure whether it is supported, contact support with the code, description, and where you encountered the issue. Support can confirm whether Thrizer supports it.
Support for a code in Thrizer is not a statement that the insurance carrier will accept or reimburse a claim using that code.
## Related articles
Learn how CPT code support works and how to handle add-on codes or multiple services.
Learn how insurer support works and why plan-level benefits still need to be checked.
Learn how to check estimated out-of-network benefits before charging a client.