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Home/Diagnosis/ICD-10 Coding for Undifferentiated Connective Tissue Disease

ICD-10 Coding for Undifferentiated Connective Tissue Disease

M35.9

Complete ICD-10-CM coding and documentation guide for icd-10 coding for undifferentiated connective tissue disease includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
UCTD
Unclassified Connective Tissue Disease
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Key Information: ICD-10 Coding for Undifferentiated Connective Tissue Disease

Essential facts and insights about ICD-10 Coding for Undifferentiated Connective Tissue Disease

Use ICD-10 code M35.9 for systemic involvement of connective tissue, unspecified, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Systemic involvement of connective tissue, unspecified

Billable Code
M35.9
Billable

Diagnostic Criteria

clinical_criteria:
  • • Symptoms overlap multiple CTDs without meeting specific criteria.
documentation_criteria:
  • • Explicit statement that criteria for specific diseases like SLE or RA are not met.

Applicable To

  • • Undifferentiated connective tissue disease

Important Notes

  • • Ensure documentation explicitly states that criteria for specific connective tissue diseases are not met.
Ancillary Codes

Additional codes that may be used with this diagnosis

I73.00

Raynaud's phenomenon

Use when Raynaud's symptoms are present alongside UCTD.

M06.9

Inflammatory arthritis

Use when arthritis symptoms are present alongside UCTD.

Frequently Asked Questions

What is the ICD-10 code for undifferentiated connective tissue disease?

The ICD-10 code for undifferentiated connective tissue disease is M35.9, used when symptoms suggest a connective tissue disorder but do not meet criteria for specific diseases.

How is UCTD documented in medical records?

UCTD documentation should include positive ANA, exclusion of specific CTDs, and detailed symptom descriptions to justify the use of M35.9.

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