ICD-10-CM Diagnosis Code A01.3:Paratyphoid fever C

A01.3

A01.3 is a billable and specific ICD-10-CM code. Accurate coding of A01.3 is essential for ensuring effective patient care and facilitating appropriate reimbursement. 

This guide provides detailed insights into its application, official guidelines, and historical background.

ICD-10-CM Diagnosis Code for Paratyphoid Fever C

The ICD-10-CM diagnosis code for Paratyphoid Fever C is A01.3.

It is a bacterial infection caused by Salmonella paratyphi C, commonly transmitted through contaminated food or water. 

Paratyphoid fever C is also known as S. hirschfeldii.It is less common than paratyphoid fever A and paratyphoid fever B.

Proper documentation using A01.3 ensures patients receive appropriate care and enables accurate healthcare reimbursement.

History Background of ICD-10-CM Diagnosis Code A01.3

The ICD-9-CM  was first introduced in 1979 and used for coding diseases and health-related conditions in the United States. 

The ICD-9-CM Diagnosis code for Paratyphoid fever C is 002.3. This coding remained consistent from 1979 to 2015.

While the ICD-9-CM system offered a basic approach to disease classification, modern healthcare needs more detail and specificity. 

To address this, the ICD-10-CM system was launched in 2015, introducing a more comprehensive and accurate coding structure. 

The transition from ICD-9-CM to ICD-10-CM significantly improved the ability to document and analyze the condition of Paratyphoid fever C.

The 2025 edition of ICD-10-CM A01.3 became effective on October 1, 2024.

YearCodeDescription
2020A01.3No Change
2021A01.3No Change
2022A01.3No Change
2023A01.3No Change
2024A01.3No Change
2025A01.3No Change

Symptoms of Paratyphoid Fever C

  • High fever
  • Abdominal pain
  • Diarrhea
  • Fatigue
  • Loss of appetite
  • Headache
  • Enlarged spleen or liver in severe cases

How Paratyphoid Fever C is Caused

  1. Contaminated Food and Water 
  2. Poor Hygiene Practices
  3. Fecal-Oral Route

Other ICD-10-CM Diagnosis Codes in A01

ICD-10-CM code A01 | Typhoid and Paratyphoid Fevers has following sub categories including A01.3 :

  • A01 Typhoid and paratyphoid fevers
  • A01.0 Typhoid fever
  • A01.00 unspecified
  • A01.01 Typhoid meningitis
  • A01.02 …… with heart involvement
  • A01.03 Typhoid pneumonia
  • A01.04 Typhoid arthritis
  • A01.05 Typhoid osteomyelitis
  • A01.09 with other complications
  • A01.1 Paratyphoid fever A
  • A01.2 Paratyphoid fever B
  • A01.3 Paratyphoid fever C
  • A01.4 Paratyphoid fever, unspecified

Final Thoughts

Proper coding of A01.3 is vital for diagnosing and managing Paratyphoid fever C. Understanding its symptoms, causes, and coding guidelines ensures accurate documentation and better patient care. This code supports effective healthcare management and ensures proper reimbursement.

About Author
content writer
Dr. Sehrish Bano, CPB & CPC

As a certified professional in both billing and coding, I specialize in streamlining healthcare revenue cycles and ensuring accurate claim submissions. With more than five years of experience serving the healthcare industry in the USA, I bring expertise in coding accuracy, compliance, and reimbursement optimization. My work focuses on reducing errors, improving efficiency, and supporting providers in delivering quality care without administrative hurdles. I am committed to helping healthcare organizations achieve financial stability and compliance through reliable billing and coding practices.

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