G62.9

🧬 ICD-10 CM G62.9 — Polyneuropathy, Unspecified

Billable Code Confirmed

ICD-10 CM G62.9 is a valid, billable 4-character ICD-10-CM code for FY2025. All four characters are present: G62 (category) + .9 (unspecified). No additional characters are required.

Non-Billable Parent Codes — Never Submit These

• ❌ G62 — 3-character header — missing the 4th character specifying the type of polyneuropathy.

  Always submit G62.9 (all 4 characters) when the exact underlying cause of the polyneuropathy is not documented.

Clinical Context: "Unspecified" vs. Specific Etiology

ICD-10 CM G62.9 is a fallback code used when a patient presents with symptoms of peripheral neuropathy, but the underlying cause has not yet been identified or documented. Polyneuropathy is typically a systemic condition affecting multiple peripheral nerves. Whenever possible, coders should query the provider to determine if the neuropathy is linked to an underlying condition, as combination codes (e.g., E11.42 for Type 2 diabetes with neurological complications, or G62.0 for drug-induced polyneuropathy) provide greater specificity and often better reimbursement/HCC mapping.

🔍 Code Description

ICD-10 CM G62.9 classifies a general, unspecified disorder of multiple peripheral nerves (polyneuropathy).

Polyneuropathy involves the simultaneous malfunction of many peripheral nerves throughout the body. The classic presentation is a symmetrical, length-dependent sensory or sensorimotor loss, often described as a “stocking-glove” distribution because symptoms usually start in the longest nerves (the toes and feet) before progressing up the legs and eventually affecting the hands.

Typical symptoms include:

• Numbness, tingling, or a “pins and needles” sensation.
• Burning, stabbing, or freezing pain.
• Loss of proprioception and balance.
• Muscle weakness and diminished deep tendon reflexes.

Common etiologies (which, if known, should be coded instead of G62.9) include:

• Diabetes mellitus
• Alcohol abuse
• Chemotherapy or other toxic exposures
• Vitamin B12 deficiency
• Autoimmune disorders

Note

Diagnosis is initially clinical but is often confirmed and quantified via Electromyography (EMG) and Nerve Conduction Studies (NCS), which help differentiate between axonal and demyelinating processes.

🌳 Code Tree / Hierarchy

G62 Other and unspecified polyneuropathies
│  
├── G62.0 Drug-induced polyneuropathy
├── G62.1 Alcoholic polyneuropathy
├── G62.2 Polyneuropathy due to other toxic agents
├── G62.8 Other specified polyneuropathies
│ │
│ ├── G62.81 Critical illness polyneuropathy
│ ├── G62.82 Radiation-induced polyneuropathy
│ └── G62.89 Other specified polyneuropathies
│
└── G62.9 POLYNEUROPATHY, UNSPECIFIED ◀ THIS CODE ✅

✅ Includes

The following clinical scenarios and terms map to G62.9:

• Neuropathy NOS (Not Otherwise Specified)
• Peripheral neuropathy NOS
• Polyneuropathy NOS
• Sensorimotor polyneuropathy, unspecified

❌ Excludes

Excludes1 — Cannot be coded together

The Excludes1 note dictates that the following conditions cannot be coded alongside G62.9. They represent specific categories of peripheral nerve issues:

• Neuritis NOS (M79.2)
• Peripheral neuritis in pregnancy (O90.89)
• polyneuropathy in hereditary and idiopathic neuropathies (G60.-)
• Inflammatory polyneuropathy (G61.-)

Code First / Code Also Notes

If the polyneuropathy is due to an underlying neoplastic disease, you must code first the underlying neoplasm (C00-D49), followed by the specific neuropathy code G13.0 (Paraneoplastic neuromyopathy and neuropathy), not G62.9.

🛠️ CPT Procedural Crosswalk — wRVU & Assistant Payable Status

polyneuropathy is typically evaluated in the outpatient setting with neurodiagnostic testing. Below are the most common procedural CPT codes paired with G62.9.

CPT Code	Description	wRVU (Facility)	Asst. Surgeon Payable?	Co-Surgeon Payable?
95909	Nerve conduction studies; 5-6 studies	1.00	No (Indicator 0)	No (Indicator 0)
95911	Nerve conduction studies; 9-10 studies	1.83	No (Indicator 0)	No (Indicator 0)
95886	Needle electromyography, each extremity, with related paraspinal areas, when performed, done with nerve conduction; complete	1.55	No (Indicator 0)	No (Indicator 0)
11900	Injection, intralesional; up to and including 7 lesions (Sometimes used loosely in trigger/diagnostic coding, but for small fiber neuropathy diagnosis, skin punch biopsies like 11104 are more common)	0.65	No (Indicator 0)	No (Indicator 0)

Note: wRVU values are estimates based on the standard CMS Physician Fee Schedule. Check current year exact values.

💊 Coding Scenarios

Scenario 1 — Initial Primary Care Presentation (Idiopathic)

Clinical Vignette: A 65-year-old male with no history of diabetes or alcohol abuse presents to his primary care physician complaining of a 6-month history of gradual burning and tingling in both of his feet. His HbA1c and B12 levels are normal. The physician diagnoses “peripheral neuropathy” and refers the patient to neurology for further evaluation.

CPT / HCPCS:

• 99213 or 99214 — Office or other outpatient visit, established patient

ICD-10-CM:

• G62.9 — Polyneuropathy, unspecified (Correct code as the etiology is unknown at this visit)

Scenario 2 — Diagnostic EMG/NCS in Neurology Clinic

Clinical Vignette: Following the referral from primary care, the patient presents to the neurology clinic. The neurologist performs a comprehensive needle EMG of both lower extremities and 9 nerve conduction studies to determine the extent and type of nerve damage. The results confirm a length-dependent, axonal sensorimotor polyneuropathy, cause undetermined.

CPT / HCPCS:

• 95886 x 2 — Needle EMG, complete, performed with NCS (billed for two extremities)
• 95911 — Nerve conduction studies; 9-10 studies

ICD-10-CM:

• G62.9 — Polyneuropathy, unspecified (Provides medical necessity for the extensive neurodiagnostic testing)

Scenario 3 — CDI Query: Specifying the Etiology

Clinical Vignette: A patient with a known 15-year history of Type 2 Diabetes is seen in the podiatry clinic for a diabetic foot ulcer. The physician notes, “Patient has profound peripheral neuropathy resulting in loss of protective sensation.” The coder initially selects G62.9.

Action / Outcome:

Using G62.9 when the documentation clearly links the neuropathy to diabetes is incorrect. “Diabetic neuropathy” requires a combination code.

Corrected ICD-10-CM Coding (Instead of G62.9):

• E11.42 — Type 2 diabetes mellitus with diabetic polyneuropathy
• E11.621 — Type 2 diabetes mellitus with foot ulcer
• (Plus applicable ulcer staging codes, e.g., L97.409)

⚠️ Coding Pitfalls and Tips

	Pitfall or Tip
❌	Do not use for known etiologies: Always verify if the neuropathy is diabetic (E08.42-E13.42), alcoholic (G62.1), drug-induced (G62.0), or hereditary (G60.9). Only use G62.9 when no cause is documented.
❌	Do not confuse with mononeuropathy: polyneuropathy (G62.9) involves multiple systemic nerves. If a patient only has entrapment of a single nerve (e.g., carpal tunnel syndrome, sciatic nerve lesion), use the specific mononeuropathy codes (G56-G57 series).
✅	Query for “Neuropathy”: Providers often just write “neuropathy.” Neuropathy can be peripheral/poly, autonomic, or mono. If the chart just says “neuropathy” without context, it defaults to G62.9 in the index, but querying for specificity is always best practice.

📚 Sources

1. CMS/NCHS. ICD-10-CM Official Guidelines for Coding and Reporting, FY2025. Tabular List — G62.9 Polyneuropathy, unspecified.

2. American Medical Association (AMA). CPT 2024/2025 Professional Edition. Medicine/Neurology and Neuromuscular Procedures — Nerve Conduction Tests and Electromyography.