HCPCS G0129
Php/iop ot service
About HCPCS G0129
Occupational therapy services requiring the skills of a qualified occupational therapist, furnished as a component of a partial hospitalization or intensive outpatient treatment program, per session (45 minutes or more)
Coding Tips for HCPCS G0129
Series-level billing guidance from the PayerReady Medical Coding Team. G-codes follow specific Medicare Part B and DME rules. These are the gotchas that drive denials.
Temporary CMS-assigned codes for procedures awaiting permanent CPT assignment. G-codes change frequently, verify the code is still active for the current year before billing. Many G-codes are MIPS quality measure indicators.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 11, 2026.
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