Cat Scratch Disease
Learn about Cat Scratch Disease (CSD), also known as Cat Scratch Fever and Bartonella Infection. This resource provides information on diagnosis, treatment, and clinical documentation for healthcare professionals. Find details on ICD-10 codes, medical coding, and best practices for documenting Cat Scratch Disease in patient charts. Understand the symptoms, causes, and management of Bartonella henselae infections for accurate and efficient healthcare documentation.
Bacterial infection spread by cat scratches or bites.
Swollen lymph nodes near scratch, fever, fatigue, headache.
Exposure to cats, especially kittens.
ICD-10 Code Families
Complete code families applicable to A28.1
When to use each related code
| Description | When to use |
|---|---|
| Bacterial infection from cat scratches. | Use for lymphadenopathy after cat contact, possible papule at scratch site. Consider Bartonella testing. |
| Infection from flea bites, causes fever, headache. | Use for fever, headache, regional lymphadenopathy after flea exposure. Consider serology for Rickettsia species. |
| Tick-borne bacterial illness, causes rash, fever, fatigue. | Use for erythema migrans rash, flu-like symptoms after tick bite. Consider Lyme disease testing. |
Best-practice checklist
- ✓Document exposure to cats/kittens.
- ✓Record lymphadenopathy location/size.
- ✓Note presence of papule/pustule at scratch site.
- ✓Document fever, fatigue, or other symptoms.
- ✓Consider Bartonella serology/PCR testing results.
Common pitfalls to avoid
Coding Cat Scratch Disease without specifying the Bartonella species (henselae, quintana) may lead to rejected claims or lower reimbursement.
If clinical findings deviate from typical CSD, documentation must support the diagnosis to avoid coding errors and audit scrutiny.
Failing to capture relevant comorbidities like lymphadenopathy or ocular manifestations can impact severity and reimbursement.
Best-practice tips
- 01Wash cat scratches immediately. Code A08.1
- 02Avoid rough play with cats. Document thoroughly for ICD-10 A68.0
- 03Control fleas on pets. SNOMED CT 72967002 for compliance
- 04Seek medical care for swollen lymph nodes. Z20.828 ICD-10 encounter code
- 05Inform clinicians of cat exposure. ICD-10 Z20.828 improves CDI
Step-by-step checklist
- 1
Hx: Animal scratch/bite, regional lymphadenopathy
- 2
PE: Papule at inoculation site, swollen lymph nodes
- 3
Consider Bartonella serology/PCR testing
- 4
R/O other infections (e.g., lymphoma, tularemia)
- 5
Document exposure details, lymphadenopathy location
Ready-to-paste narrative
Patient presents with symptoms consistent with cat scratch disease (CSD), also known as cat scratch fever or Bartonella infection. The patient reports regional lymphadenopathy, most notably in the axillary region, with onset approximately two weeks following a reported cat scratch to the left forearm. The scratch site itself is healed, with a faintly visible scar noted. The patient denies fever but reports mild malaise and fatigue. Differential diagnosis includes other causes of lymphadenopathy such as infectious mononucleosis, lymphoma, and tularemia. Given the history of cat exposure, characteristic lymphadenopathy, and absence of other systemic symptoms, a presumptive diagnosis of cat scratch disease is made. Treatment will focus on supportive care, including over-the-counter pain relievers for discomfort related to the enlarged lymph nodes. Monitoring for potential complications such as Parinaud oculoglandular syndrome or more severe systemic Bartonella infection will be conducted. Patient education provided regarding cat scratch disease transmission, prevention, and prognosis. Follow-up appointment scheduled in two weeks to assess lymph node regression. ICD-10 code A28.1, Bartonellosis, will be used for billing purposes. This diagnosis is consistent with current clinical guidelines for cat scratch disease management.
Common questions and answers
What are the most reliable diagnostic tests for confirming Cat Scratch Disease in pediatric patients with atypical presentations?+
Diagnosing Cat Scratch Disease (CSD), also known as Cat Scratch Fever or Bartonella Infection, can be challenging, especially in children with atypical presentations. While a thorough history and physical exam, including assessing for regional lymphadenopathy and a history of cat exposure (scratch, bite, or lick), are crucial, they aren't always definitive. Serology, specifically testing for Bartonella henselae antibodies (IgG and IgM), is considered the most common and reliable diagnostic method. Polymerase chain reaction (PCR) testing of lymph node aspirates or biopsies can provide a more definitive diagnosis, especially in cases with unusual presentations or when serology is inconclusive. Consider implementing PCR testing for patients with suspected CSD who present with unusual symptoms or have negative serology. In cases with severe or atypical manifestations, consider consulting with an infectious disease specialist. Explore how advancements in PCR technology are improving CSD diagnosis. Learn more about interpreting serological results for Bartonella henselae.
How do I differentiate Cat Scratch Disease from other causes of lymphadenopathy in a patient with a history of cat exposure?+
Differentiating Cat Scratch Disease (CSD), or Bartonella Infection, from other causes of lymphadenopathy in patients with cat exposure requires a comprehensive approach. While cat exposure suggests CSD, other conditions like lymphoma, other bacterial infections (e.g., staphylococcal or streptococcal), or even tularemia should be considered. Begin with a detailed history, including the nature of the cat interaction (scratch, bite, or lick), the timing of symptom onset, and any associated symptoms like fever, malaise, or skin lesions. Perform a thorough physical exam, paying close attention to the characteristics of the affected lymph nodes. Laboratory tests play a vital role in differentiation. Serological testing for Bartonella henselae antibodies can be highly suggestive of CSD. If the diagnosis remains uncertain, consider performing a lymph node biopsy or aspirate for PCR analysis to identify the causative organism. Explore how imaging studies can help characterize lymphadenopathy. Consider implementing a diagnostic algorithm for lymphadenopathy to ensure accurate and timely diagnosis.
What are the evidence-based management strategies for Cat Scratch Disease in immunocompetent adults, and when is antibiotic therapy warranted?+
For immunocompetent adults, Cat Scratch Disease (CSD) or Cat Scratch Fever, caused by the bacteria Bartonella henselae, is typically self-limiting and often resolves without specific treatment. Management primarily focuses on symptomatic relief, including pain management for lymphadenopathy, which can be addressed with warm compresses and over-the-counter analgesics. Antibiotic therapy is generally not recommended for uncomplicated CSD in immunocompetent individuals. However, in cases of severe lymphadenopathy, particularly if it involves suppuration or significant pain, or for patients with systemic symptoms like prolonged fever or unusual manifestations, antibiotic treatment may be considered. Azithromycin, doxycycline, and rifampin are among the antibiotics that have shown some efficacy in treating CSD. Learn more about the evidence supporting various treatment approaches for CSD. Consider implementing a watchful waiting approach for uncomplicated cases while closely monitoring for disease progression.
Clinical accuracy: This information is provided for documentation and coding guidance and should not replace professional medical judgment.
Coding standard: ICD-10-CM, current FY guidelines.