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B35.9
ICD-10-CM
Tinea Infection

Learn about tinea infections including diagnosis codes, clinical documentation tips, and healthcare best practices. Find information on tinea corporis, tinea pedis, tinea cruris, tinea capitis, and onychomycosis treatment and management. This resource covers relevant medical coding guidelines, ICD-10 codes for tinea, and differential diagnosis considerations for various dermatophytoses. Explore effective treatment options, antifungal medications, and preventative measures for tinea infections.

Also known as

Ringworm
Dermatophytosis
Onychomycosis

Related ICD-10 Code Ranges

Complete code families applicable to AAPC B35.9 Coding
B35.0-B35.9

Tinea infections

Dermatophytoses including tinea barbae, capitis, corporis, cruris, pedis, unguium.

B36.0-B36.9

Other superficial mycoses

Includes pityriasis versicolor, black piedra, and white piedra.

B49

Mycosis, unspecified

Covers fungal infections where the specific site or type is not documented.

Code Comparison

Related Codes Comparison

When to use each related code

Description
Ringworm fungal skin infection
Candidiasis (Yeast Infection)
Intertrigo (Skin Fold Rash)

Documentation Best Practices

Documentation Checklist
  • Tinea infection type (e.g., corporis, pedis)
  • Location of infection (e.g., scalp, groin)
  • Clinical presentation (e.g., rash, itching)
  • KOH prep result (positive/negative)
  • Treatment plan (e.g., antifungal cream)

Coding and Audit Risks

Common Risks
  • Unspecified Site

    Coding tinea without specifying body site (e.g., tinea corporis, tinea pedis) leads to inaccurate data and claim rejections. Use specific ICD-10 codes for compliant billing. CDI crucial.

  • Misdiagnosis

    Confusing tinea with other skin conditions like eczema or psoriasis impacts treatment and coding accuracy. Proper diagnosis crucial for ICD-10 specificity and healthcare compliance.

  • Lack of Documentation

    Insufficient documentation of infection type and site can trigger audits and denials. Precise clinical documentation supports accurate coding, ensures compliance, and optimizes reimbursement.

Mitigation Tips

Best Practices
  • Document lesion morphology, location, KOH results for accurate ICD-10 coding (B35.x).
  • Improve CDI: Clearly document 'tinea' type (e.g., pedis, cruris) for specificity.
  • Ensure antifungal Rx aligns with documented tinea type for compliance and reimbursement.
  • KOH microscopy confirmation vital for correct diagnosis, avoiding unnecessary antifungals.
  • Review clinical guidelines for tinea management, optimizing patient care and coding accuracy.

Clinical Decision Support

Checklist
  • Confirm visual signs: rash, scaling, redness
  • KOH microscopy: verify fungal presence
  • Wood's lamp: assess fluorescence (if applicable)
  • Culture: confirm species (if needed for treatment)

Reimbursement and Quality Metrics

Impact Summary
  • Tinea Infection Reimbursement: Maximize claims accuracy with proper ICD-10 codes (B35.0-B35.9) for optimal payment.
  • Coding Accuracy Impact: Correctly specify body site (e.g., B35.1 for tinea cruris) to avoid denials and improve revenue cycle.
  • Hospital Reporting Metrics: Accurate tinea diagnosis coding impacts infection control surveillance and public health reporting.
  • Quality Metrics Impact: Precise coding facilitates tracking treatment efficacy and outcomes for performance improvement.

Streamline Your Medical Coding

Let S10.AI help you select the most accurate ICD-10 codes for . Our AI-powered assistant ensures compliance and reduces coding errors.

Quick Tips

Practical Coding Tips
  • Code specific tinea type (e.g., B35.1)
  • Document infection site precisely
  • Confirm diagnosis with KOH test if done
  • Consider comorbidities like diabetes
  • Rule out similar conditions in documentation

Documentation Templates

Patient presents with complaints consistent with tinea infection.  Symptoms include pruritus, erythema, and scaling, localized to the [affected area: e.g., scalp, groin, feet, body].  Visual inspection reveals [description of lesion: e.g., well-demarcated, annular plaque with raised, scaly border and central clearing; macerated, fissured skin;  diffuse scaling].  Differential diagnosis includes eczema, psoriasis, seborrheic dermatitis, and intertrigo.  KOH microscopy [positive/negative] for fungal hyphae.  Diagnosis of tinea [corporis/cruris/pedis/capitis/unguium] established based on clinical presentation and [KOH microscopy/clinical findings].  Treatment plan includes topical antifungal therapy with [medication name and dosage instructions: e.g., clotrimazole 1% cream applied twice daily for 2-4 weeks; terbinafine hydrochloride 1% cream applied once daily for 1-2 weeks].  Patient education provided regarding hygiene practices, medication application, and potential side effects.  Follow-up scheduled in [duration: e.g., 2 weeks] to assess treatment response.  ICD-10 code: [appropriate ICD-10 code: e.g., B35.1, B35.3, B35.4, B35.6, B36.0].  Keywords: tinea, ringworm, dermatophytosis, fungal infection, skin infection, itching, rash, scaling, erythema, KOH test, antifungal treatment, topical medication, ICD-10 B35, ICD-10 B36.
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