95907

⚡ CPT 95907 — Nerve Conduction Studies; 1-2 Studies

Quick Reference

wRVU: 1.00 | Global Period: 000 (same day) |
Assistant Payable: ❌ No | Bilateral Indicator: 0

CPT 95907 is used only when 1-2 distinct nerve conduction studies are performed.
Testing more than 2 nerves requires a higher-level code in the 95907-95913 family.

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📋 Clinical Description

CPT 95907 describes a limited nerve conduction study (NCS) evaluating 1-2 peripheral nerves to assess conduction velocity, amplitude, latency, waveform morphology, and overall nerve integrity. The test uses surface electrodes to stimulate and record electrical activity along motor, sensory, or mixed nerves. This code is distinct from 95908 and 95909, which represent progressively more extensive testing involving 3-6 nerves, and from 95913, which represents 13 or more studies.

Nerve conduction studies are used to diagnose conditions such as G56.01 (carpal tunnel syndrome, right upper limb), G60.9 (idiopathic neuropathy), and G62.9 (polyneuropathy). These conditions involve impaired nerve signaling due to compression, metabolic disease, trauma, or degenerative processes. When symptoms are bilateral or progressive, higher‑level NCS codes may be required, but 95907 is appropriate when only 1-2 nerves are tested.

This procedure may be performed in the following clinical contexts:

• Suspected focal entrapment neuropathy — Used when symptoms are localized and only 1-2 nerves need evaluation.
• Early or mild neuropathy — When symptoms are subtle and a limited study is clinically appropriate.
• Follow‑up testing — When monitoring progression or treatment response for a previously diagnosed neuropathy.
• Post‑traumatic nerve injury — When evaluating a single nerve after localized trauma.
• Pre‑surgical evaluation — When confirming nerve involvement before minor procedures.

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🔬 Anatomical & Procedural Considerations

Variant	Mechanism	Key Notes
Motor NCS	Measures conduction velocity and amplitude of motor nerves using surface electrodes.	Requires accurate electrode placement; latency and amplitude must be documented.
Sensory NCS	Evaluates sensory nerve conduction using antidromic or orthodromic stimulation.	Sensory studies are more sensitive to temperature; documentation must include limb temperature.
Mixed NCS	Assesses nerves with both sensory and motor fibers.	Must document which components were tested and why.

Clinical Pearl

Document exact nerves tested, limb temperature, and technique. Missing these details is the #1 audit failure for NCS codes.

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✅ Procedure Includes

• Pre‑procedure assessment of symptoms and nerve distribution.
• Placement of surface electrodes.
• Electrical stimulation of nerves.
• Measurement of latency, amplitude, and conduction velocity.
• Interpretation of results.
• Documentation of nerves tested and findings.

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❌ Excludes / Do Not Report Together

Code	Description	Relationship
95908	NCS, 3-4 studies	Use instead when 3-4 nerves are tested.
95909	NCS, 5-6 studies	Use instead when 5-6 nerves are tested.
95910	NCS, 7-8 studies	Represents more extensive testing; not reported with 95907.
95886	Needle EMG, limited	Separately reportable when performed and documented.

Bundling Alert

NCS codes have a 000‑day global, meaning all work is same‑day only.
Do not append modifier ‑25 unless a separately identifiable E/M is documented.

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🌳 Code Tree — Medicine: Neurology & Neuromuscular Procedures

95907  NCS; 1-2 studies
95908  NCS; 3-4 studies
95909  NCS; 5-6 studies
95910  NCS; 7-8 studies
95911  NCS; 9-10 studies
95912  NCS; 11-12 studies
95913  NCS; 13+ studies

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💰 RVU & Reimbursement Profile

Component	Value
Work RVU	1.00
Global Period	000
Bilateral Indicator	0
Assistant Surgeon	❌ Not Payable
Co‑Surgeon	❌ Not Applicable
Team Surgery	❌ Not Applicable
PC/TC Split	❌ No
Modifier -51 Exempt	Yes
Anesthesia	Not separately billable

Bilateral Billing Rules

NCS codes are not bilateral. Each nerve tested counts as one study, not one per side.

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🏷️ Modifier Reference

Modifier	Name	When to Apply
-RT/-LT	Laterality	Only if documentation specifies unilateral testing.
-25	Significant E/M	Only when a separate E/M is performed.
-59	Distinct Service	Rare; only when unbundling is justified.
-52	Reduced Services	If the study is partially completed.
-53	Discontinued Procedure	If stopped due to patient safety.

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🩺 Common ICD‑10‑CM Pairings

Primary Group

ICD‑10	Description	HCC?	Notes
G56.01	Carpal tunnel, right	❌	Most common indication.
G56.02	Carpal tunnel, left	❌	Use when left‑sided symptoms documented.
G60.9	Idiopathic neuropathy	❌	Use when etiology unknown.
G62.9	Polyneuropathy	❌	Use for diffuse symptoms.
M79.2	Neuralgia	❌	Use when pain is nerve‑related.

Secondary Group

ICD‑10	Description	HCC?	Notes
E11.40	Diabetic neuropathy	❌	Use when diabetes is causal.
T14.8XXA	Nerve injury	❌	Use for trauma‑related neuropathy.

Coding Specificity Reminder

Document laterality, nerve distribution, and etiology whenever possible.

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🏥 MS‑DRG Considerations

CPT 95907 is an outpatient/office‑only diagnostic test and does not drive DRG assignment.
If performed during an inpatient stay, it may be captured under ICD‑10‑PCS but will not affect DRG grouping.

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🔧 ICD‑10‑PCS Equivalents

PCS Code	Description	Modality
4A10X4Z	Measurement of peripheral nerve conduction	External
4A10X5Z	Measurement of sensory nerve conduction	External
4A10X6Z	Measurement of motor nerve conduction	External
4A10X7Z	Measurement of mixed nerve conduction	External

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📝 Coding Examples

Example 1 — Office Visit

Clinical Scenario:
A 52‑year‑old woman presents with right‑hand numbness. NCS is performed on the right median nerve only. Limb temperature is documented at 32°C. Findings show prolonged latency consistent with mild carpal tunnel syndrome.

Field	Code	Rationale
CPT	95907	Only 1 nerve tested.
PDx	G56.01	Right‑sided carpal tunnel.

Note

No E/M billed because no separate evaluation was performed.

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Example 2 — Bilateral Symptoms

Clinical Scenario:
A patient presents with bilateral foot tingling. NCS is performed on the right peroneal and left tibial nerves (2 studies total).

Field	Code	Rationale
CPT	95907	Two nerves tested.
PDx	G62.9	Polyneuropathy suspected.

Warning

Do not bill 95908; only 2 studies were performed.

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Example 3 — Diabetic Neuropathy

Clinical Scenario:
A diabetic patient presents with burning feet. One sensory nerve study is performed on each foot (2 total).

Field	Code	Rationale
CPT	95907	Two studies.
PDx	E11.40	Diabetic neuropathy.

Note

Global period does not apply; 000‑day code.

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⚠️ Common Coding Pitfalls

• Counting studies incorrectly: Each nerve = one study.
• Missing limb temperature: Required for valid NCS documentation.
• Using 95907 when more nerves were tested: Leads to underbilling.
• Billing EMG without documentation: Must support medical necessity.
• Reporting bilateral as two studies automatically: Only count nerves tested.
• Missing etiology documentation: Especially in diabetic neuropathy.

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📎 Sources

AMA CPT 2025 · CMS MPFS 2025 · NCCI Manual 2025 · AANEM Guidelines · ICD‑10‑CM 2025