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Procedure codes used to identify procedures of interest
| Procedure | CPT codes | HCPCS codes |
|---|---|---|
| Spirometry | 94010, 94014–94016, 94060, 94070, 94375, 94620 | |
| Oxygen therapy | E0424, E0425, E0430, E0431, E0433, E0434, E0435, E0439, E0440, E0441, E0442, E0443, E0444, E1390, E1391, E1392, E1405, E1406, K0738, K0741, S8120, S8121 |
Abbreviations: CPT, Current Procedural Terminology; HCPCS, Healthcare Common Procedure Coding System.
