Primary progressive multiple sclerosis, unspecified

This code signifies a diagnosis of primary progressive multiple sclerosis (PPMS) where the specific subtype (e.g., active, not active, with or without progression) is not documented. PPMS is a chronic, debilitating neurological condition characterized by a steady accumulation of disability from the onset, without early relapses or remissions.

Use this code when the medical record clearly states a diagnosis of primary progressive multiple sclerosis, but lacks further specification regarding disease activity or progression. This is appropriate for initial diagnoses or follow-up visits where the clinician has not yet determined or documented the specific disease course modifiers. Documentation should explicitly state "primary progressive multiple sclerosis, unspecified."

• Avoid using this code if the documentation specifies "active" or "not active" PPMS, or "with progression" or "without progression," as more specific codes exist.
• Ensure the physician's documentation clearly distinguishes PPMS from relapsing-remitting or secondary progressive forms of MS.
• Query the provider for more specific documentation regarding disease activity and progression to allow for more precise coding when possible.