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ICD-10-CM Codes
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A00-B99
Certain infectious and parasitic diseases
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A70-A74
Other diseases caused by chlamydiae
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A74-
Other diseases caused by chlamydiae
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2021 ICD-10-CM Diagnosis Code A74
2021 ICD-10-CM Diagnosis Code A74
Other diseases caused by chlamydiae
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
- A74 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2021 edition of ICD-10-CM A74 became effective on October 1, 2020.
- This is the American ICD-10-CM version of A74 - other international versions of ICD-10 A74 may differ.
Type 1 ExcludesType 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as A74. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- neonatal chlamydial conjunctivitis (
ICD-10-CM Diagnosis Code P39.1
Neonatal conjunctivitis and dacryocystitis
2016 2017 2018 2019 2020 2021 Billable/Specific Code Code on Newborn Record
Applicable To- Neonatal chlamydial conjunctivitis
- Ophthalmia neonatorum NOS
Type 1 Excludes- gonococcal conjunctivitis (A54.31)
- neonatal chlamydial pneumonia (
ICD-10-CM Diagnosis Code P23.1
Congenital pneumonia due to Chlamydia
2016 2017 2018 2019 2020 2021 Billable/Specific Code Code on Newborn Record
- Reiter's disease (
ICD-10-CM Diagnosis Code M02.3
Reiter's disease
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
- sexually transmitted chlamydial diseases (
ICD-10-CM Diagnosis Code A55
Chlamydial lymphogranuloma (venereum)
2016 2017 2018 2019 2020 2021 Billable/Specific Code
Applicable To- Climatic or tropical bubo
- Durand-Nicolas-Favre disease
- Esthiomene
- Lymphogranuloma inguinale
ICD-10-CM Diagnosis Code A56
Other sexually transmitted chlamydial diseases
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
Includes- sexually transmitted diseases due to Chlamydia
- trachomatis
Type 1 Excludes- neonatal chlamydial conjunctivitis (P39.1)
- neonatal chlamydial pneumonia (P23.1)
Type 2 Excludes- chlamydial lymphogranuloma (A55)
- conditions classified to A74.-
Type 2 ExcludesType 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (A74) and the excluded code together.
The following code(s) above
A74 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to
A74:
- 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
Code annotations containing back-references to A74:
ICD-10-CM Codes Adjacent To A74
A69.22 Other neurologic disorders in Lyme disease
A69.23 Arthritis due to Lyme disease
A69.29 Other conditions associated with Lyme disease
A69.8 Other specified spirochetal infections
A69.9 Spirochetal infection, unspecified
A70 Chlamydia psittaci infections
A71.0 Initial stage of trachoma
A71.1 Active stage of trachoma
A71.9 Trachoma, unspecified
A74
Other diseases caused by chlamydiae
A74.0 Chlamydial conjunctivitis
A74.8 Other chlamydial diseases
A74.89 Other chlamydial diseases
A74.9 Chlamydial infection, unspecified
A75.0 Epidemic louse-borne typhus fever due to Rickettsia prowazekii
A75.1 Recrudescent typhus [Brill's disease]
A75.2 Typhus fever due to Rickettsia typhi
A75.3 Typhus fever due to Rickettsia tsutsugamushi
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
