2024 ICD-10-CM Diagnosis Code A69.20

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Lyme disease, unspecified

  • A69.20 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM A69.20 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of A69.20 – other international versions of ICD-10 A69.20 may differ.

The following code(s) above A69.20 contain annotation back-references

 that may be applicable to A69.20:

  • A00-B99  Certain infectious and parasitic diseases
  • A65-A69  Other spirochetal diseases
  • A69.2  Lyme disease

Approximate Synonyms

  • Acute lyme disease
  • Erythema chronica migrans
  • Erythema chronicum migrans (skin condition)
  • Lyme disease

Clinical Information

  • Lyme disease is an infectious disease caused by the spirochete Borrelia burgdorferi. In the United States, it is primarily transmitted by Ixodes dammini and Pacificus ticks, while in Europe, it is transmitted by Ixodes ricinus. Lyme disease presents with early and late cutaneous symptoms and can also affect the nervous system, heart, eyes, and joints in varying combinations. Previously known as Lyme arthritis, it was first identified in Old Lyme, Connecticut.
  • Early symptoms of Lyme disease include fever, headache, fatigue, depression, and a characteristic skin rash called erythema migrans. If left untreated, the disease can progress to involve the joints, heart, and nervous system.
  • Lyme disease is a bacterial infection you get from the bite of an infected tick. The first symptom is usually a rash, which may look like a bull’s eye. As the infection spreads, you may have
    • a fever
    • a headache
    • muscle and joint aches
    • a stiff neck
    • fatigue
  • Lyme disease can be difficult to diagnose because you might not notice a tick bite, and its symptoms often resemble those of the flu and other illnesses. In the early stages, your healthcare provider will evaluate your symptoms and medical history to determine if you have Lyme disease. Lab tests can assist in diagnosis but may not always provide a clear result. In the later stages, different lab tests can confirm the presence of Lyme disease.
  • Antibiotics can cure most cases of Lyme disease, and early treatment leads to quicker and more complete recovery. However, some patients may continue to experience muscle or joint aches and nervous system symptoms even after treatment. This condition is known as post-Lyme disease syndrome (PLDS). Long-term antibiotics have not been proven to help with PLDS, but there are ways to manage its symptoms, and most patients improve over time.
  • Recurrent multisystemic infectious disease caused by a spirochete, borrelia burgdorferi, which is transmitted chiefly by ixodes ticks; it is a disease with early and late cutaneous manifestations plus involvement of the nervous system, heart, eye, and joints in variable combinations.

ICD-10-CM A69.20 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 867 Other infectious and parasitic diseases diagnoses with mcc
  • 868 Other infectious and parasitic diseases diagnoses with cc
  • 869 Other infectious and parasitic diseases diagnoses without cc/mcc

Convert A69.20 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

Diagnosis Index entries containing back-references to A69.20: