ICD Code G20.A1

ICD code G20.A1 is Parkinson's disease without dyskinesia and without mention of fluctuations.

1. Diagnosis of Parkinson's disease is established.

2. No evidence of dyskinesia is present.

3. No mention or documentation of motor fluctuations.

4. Clinical presentation includes classic Parkinsonian symptoms such as bradykinesia, rigidity, resting tremor, and postural instability.

5. Symptoms are not attributable to secondary causes such as medication-induced parkinsonism or other neurodegenerative disorders.

6. Disease course is consistent with idiopathic Parkinson's disease without complications of dyskinesia or fluctuations.

Relevant CPT codes that may be used to treat ICD code G20.A1 include:

- 99202–99215 (Evaluation and Management office visits)

- 90832, 90834, 90837 (Psychotherapy services, if applicable)

- 96116, 96121 (Neurobehavioral status exam)

- 96365–96372 (Therapeutic, prophylactic, or diagnostic injection/infusion)

- 64642, 64643 (Chemodenervation, extremity muscles)

- 95970–95972 (Electronic analysis of implanted neurostimulator pulse generator system)

- 95885–95887 (Needle electromyography)

- 97110, 97112, 97116 (Physical therapy modalities)

- 99406, 99407 (Smoking and tobacco use cessation counseling, if indicated)

Selection of CPT codes should be based on the specific services rendered to the patient.

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