G12.22
BillableProgressive bulbar palsy
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is G12.22 an HCC code?
Yes. G12.22 maps to Motor Neuron Disease, Including Amyotrophic Lateral Sclerosis under the CMS-HCC V28 risk adjustment model (and Amyotrophic Lateral Sclerosis and Other Motor Neuron Disease under V24).
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for G12.22
For G12.22 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically — it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed G12.22 during that encounter — not just copy-forwarded from a problem list.
What This Code Means
G12.22 is the ICD-10-CM diagnosis code for progressive bulbar palsy. A progressive neurological condition characterized by weakness and wasting of muscles in the face, tongue, and throat, affecting speech and swallowing. G12.22 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering systemic atrophies primarily affecting the central nervous system (g10-g14).
Under the CMS-HCC V28 risk adjustment model, G12.22 maps to Motor Neuron Disease, Including Amyotrophic Lateral Sclerosis (HCC 190) with a community, non-dual, aged base RAF weight of 0.935. Under the older CMS-HCC V24 model, G12.22 maps to Amyotrophic Lateral Sclerosis and Other Motor Neuron Disease (HCC 73) with a community, non-dual, aged base RAF weight of 0.896. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.
Document symptoms related to bulbar muscles (tongue, pharynx, larynx) to support this specific diagnosis. Because G12.22 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for G12.22 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document symptoms related to bulbar muscles (tongue, pharynx, larynx) to support this specific diagnosis
- •Coordinate with speech-language pathology and swallowing studies documentation when present
Clinical Significance
Progressive bulbar palsy is a motor neuron disease variant primarily affecting the muscles controlling speech, swallowing, and breathing. It represents a particularly challenging clinical scenario because bulbar dysfunction leads to aspiration pneumonia, malnutrition, and communication difficulties, often progressing to generalized amyotrophic lateral sclerosis.
Documentation Requirements
- ✓Documentation of progressive weakness in bulbar muscles (tongue, pharynx, larynx)
- ✓Speech and swallowing evaluation results
- ✓Videofluoroscopic swallowing study or fiberoptic endoscopic evaluation if performed
- ✓Electromyography findings showing denervation in bulbar muscles
- ✓Assessment of respiratory function
- ✓Nutritional status and need for alternative feeding methods
Commonly Confused Codes
- •G12.21 — Amyotrophic lateral sclerosis: involves both bulbar and limb muscles; progressive bulbar palsy may evolve into this
- •G12.20 — Motor neuron disease, unspecified: less specific, should not be used when bulbar palsy is documented
- •G70.00 — Myasthenia gravis: can cause bulbar symptoms but is a neuromuscular junction disorder, not motor neuron disease
- •R13.10 — Dysphagia, unspecified: symptom code that should not replace the underlying disease code