ICD Code J45.998

ICD code J45.998 is used to indicate a diagnosis of asthma that does not fit into more specific asthma categories, covering other or unspecified types of asthma.

1. Patient presents with symptoms consistent with asthma, such as wheezing, shortness of breath, chest tightness, or coughing.

2. Clinical evaluation confirms asthma, but the presentation does not fit into more specific asthma subtypes (e.g., allergic, nonallergic, exercise-induced).

3. Diagnostic testing (such as spirometry or peak flow measurement) supports variable airflow obstruction or airway hyperresponsiveness.

4. Exclusion of other respiratory conditions that could explain the symptoms.

5. Asthma symptoms are present but do not meet the criteria for other specified asthma codes.

6. Provider documentation indicates asthma with atypical features or unspecified characteristics not classified elsewhere.

Relevant CPT codes that may be used to treat ICD code J45.998 include:

- 94010 (Spirometry, including graphic record, total and timed vital capacity, expiratory flow rate measurement(s), with or without maximal voluntary ventilation)

- 94640 (Pressurized or nonpressurized inhalation treatment for acute airway obstruction or for sputum induction for diagnostic purposes)

- 94664 (Demonstration and/or evaluation of patient utilization of an aerosol generator, nebulizer, metered dose inhaler or IPPB device)

- 99201–99215 (Office or other outpatient evaluation and management services, new or established patient)

- 99406–99407 (Smoking and tobacco use cessation counseling visit)

- 94620 (Pulmonary stress testing; simple (eg, 6-minute walk test), including measurement of heart rate, oximetry, and oxygen titration)

CPT code selection should be based on the specific services rendered for ICD code J45.998.

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