ICD-10 Coding for Mycosis Fungoides(C84.0, C84.01)
Complete ICD-10-CM coding and documentation guide for Mycosis Fungoides. Includes clinical validation requirements, documentation requirements, and coding pitfalls.
Also known as:
Related ICD-10 Code Ranges
Complete code families applicable to Mycosis Fungoides
C84.0-C84.09Primary Range
Mycosis Fungoides
This range covers the primary ICD-10 codes for Mycosis Fungoides, specifying different anatomical sites.
Peripheral T-cell lymphoma
This code is excluded from Mycosis Fungoides and should be used only if pathology explicitly excludes MF.
Code Comparison: When to Use Each Code
Compare key differences between these codes to ensure accurate selection
| Code | Description | When to Use | Key Documentation |
|---|---|---|---|
| C84.0 | Mycosis fungoides | Use when Mycosis Fungoides is diagnosed but the specific site is not documented. |
|
| C84.01 | Mycosis fungoides, lymph nodes of head, face, and neck | Use when Mycosis Fungoides involves lymph nodes of the head, face, or neck. |
|
Clinical Decision Support
Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.
Key Information: ICD-10 code for Mycosis Fungoides
Essential facts and insights about Mycosis Fungoides
Primary ICD-10-CM Codes for mycosis fungoides
Decision Criteria
clinical Criteria
- Biopsy confirms Mycosis Fungoides
documentation Criteria
- Specific site not documented
Applicable To
- Mycosis fungoides, unspecified site
Excludes
- Peripheral T-cell lymphoma (C84.4)
Clinical Validation Requirements
- Biopsy confirming epidermotropic T-cell infiltrate
- Staging information (TNM classification)
Code-Specific Risks
- Confusion with other T-cell lymphomas
- Incorrect use without biopsy confirmation
Coding Notes
- Ensure biopsy confirmation and specific site documentation when applicable.
C84.01 - Mycosis fungoides, lymph nodes of head, face, and neck
Use when Mycosis Fungoides involves lymph nodes of the head, face, or neck.
Applicable To
- Mycosis fungoides involving cervical lymph nodes
Excludes
- Peripheral T-cell lymphoma (C84.4)
Clinical Validation Requirements
- Biopsy confirming nodal involvement
- Imaging showing lymph node enlargement
Coding Notes
Ensure documentation specifies nodal involvement.
Ancillary Codes
Additional codes that should be used in conjunction with the main diagnosis codes when applicable.
Rash
R21Differential Codes
Alternative codes to consider when ruling out similar conditions to the primary diagnosis.
Peripheral T-cell lymphoma
C84.4Documentation & Coding Risks
Avoid these common documentation and coding issues when documenting Mycosis Fungoides to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code C84.0.
Impact
Clinical: Leads to inaccurate diagnosis coding., Regulatory: Potential non-compliance with coding standards., Financial: May result in claim denials or reduced reimbursement.
Mitigation Strategy
Always document the specific site of MF involvement., Include biopsy and imaging results in the medical record.
Impact
Reimbursement: Incorrect coding may lead to denied claims., Compliance: Non-compliance with coding guidelines., Data Quality: Inaccurate clinical data representation.
Mitigation Strategy
Query provider to confirm Mycosis Fungoides vs. other CTCL subtypes.
Impact
Failure to document specific site involvement can lead to audit issues.
Mitigation Strategy
Ensure thorough documentation of biopsy and imaging results.
Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.
Frequently Asked Questions
Common questions about ICD-10 coding for Mycosis Fungoides, with expert answers to help guide accurate code selection and documentation.
Documentation Templates for Mycosis Fungoides
Use these documentation templates to ensure complete and accurate documentation for Mycosis Fungoides. These templates include all required elements for proper coding and billing.
Mycosis Fungoides with nodal involvement
Specialty: DermatologyRequired Elements
- Patient history
- Biopsy results
- Staging information
- Treatment plan
Example Documentation
Examples: Poor vs. Good Documentation
Poor Documentation Example
Good Documentation Example
Explanation
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