CPT Code 95911: Nerve conduction studies, 9-10 studies

Key Takeaways

CPT Code 95911 describes nerve conduction studies involving 9-10 individual motor or sensory nerves tested in a single session.

Each named nerve counts as one study regardless of how many sites are tested along that nerve, per CMS Article A56619.

Billing 95911 with EMG codes (95885, 95886) on the same day is generally permitted but may require Modifier 59 or XU depending on current NCCI edits.

Pabau’s claims management software and digital documentation tools help neurology practices capture the nerve-by-nerve detail needed for clean NCS claims.

CPT Code 95911 is the billing descriptor for nerve conduction studies (NCS) covering exactly 9-10 individual nerve studies performed in a single encounter. Electrodiagnostic testing at this scale is common in comprehensive neuromuscular evaluations where carpal tunnel syndrome, peripheral neuropathy, or radiculopathy is under investigation.

The American Medical Association (AMA) publishes CPT Code 95911 under the Neurology and Neuromuscular Procedures section. It sits within the NCS code ladder that runs from CPT 95907 (1-2 studies) through CPT 95913 (13 or more studies). Selecting the right code depends entirely on how many individual nerves were evaluated during the session.

The NCS code ladder: CPT 95907-95913

The NCS code series uses a nerve-count threshold to determine which code applies. Each motor or sensory nerve tested counts as one study. The table below shows the full ladder relevant to most neurology billing workflows, from CPT 95907 at the low end up to CPT 95913 for studies of 13 or more nerves.

Work RVUs are approximate and based on published Medicare Physician Fee Schedule values, which CMS revalues periodically. Estimated Medicare payments also vary by geographic locality and the annual conversion factor. Confirm current rates with the CMS Physician Fee Schedule Look-Up Tool for your MAC jurisdiction.

How to count nerves correctly

The most costly billing mistake in NCS coding is miscounting studies. CMS Medicare Coverage Database Article A56619 is explicit: each code in the 95907-95913 series can be reimbursed only once per nerve, or named branch of a nerve, regardless of how many sites are tested along that nerve.

Testing the ulnar nerve at the wrist, forearm, below-elbow, above-elbow, axilla, and supraclavicular sites all counts as a single study. The nerve name determines the count, not the electrode placement count.

• Motor nerves: Each named motor nerve (ulnar, median, peroneal, tibial) counts as one study.
• Sensory nerves: Each named sensory nerve (sural, radial sensory, medial plantar) counts as one study.
• F-waves and H-reflexes: These are typically captured during the motor nerve study and do not add to the study count separately unless billed under a distinct code.
• Bilateral studies: Testing the same named nerve on both sides counts as two studies (one per side).

For a 9-10 nerve study justifying CPT Code 95911, document each nerve by name in the procedure report. Coders cannot reliably select the correct ladder code if the report lists “bilateral upper and lower extremity NCS” without naming the individual nerves tested.

Documentation requirements for CPT Code 95911

Clean NCS claims start with the procedure report. Payers and Medicare audit contractors review this document when adjudicating CPT Code 95911. Missing or vague documentation is the primary driver of claim denials in electrodiagnostic billing. Practices using digital intake and documentation forms can build structured NCS report templates that capture the required fields at the point of care.

Required elements in the NCS report

• Each nerve tested by name: List every motor and sensory nerve evaluated (e.g., right median motor, left ulnar sensory).
• Stimulation sites and recording sites: Specify where electrodes were placed for each nerve.
• Measured parameters: Latency, amplitude, conduction velocity, and F-wave latency where applicable.
• Comparison to normal values: Reference age-appropriate normative data and note which parameters are abnormal.
• Clinical interpretation: The interpreting physician must sign off with a summary of findings and their clinical significance.
• Medical necessity statement: The documented diagnosis (ICD-10 codes such as G56.00-G56.03 for carpal tunnel syndrome) must support the scope of the NCS performed.

Maintaining structured patient records tied to each encounter makes retrospective audits far easier to defend. A single-page NCS summary that names all tested nerves, their parameters, and the interpreting clinician’s signature satisfies most payer and Medicare documentation standards. For the neurologic exam that supports the order, a cranial nerve examination checklist provides a ready-made structure.

Medicare coverage and reimbursement for CPT 95911

Medicare covers CPT Code 95911 when medical necessity is established through a supported ICD-10 diagnosis and the NCS is performed or directly supervised by the treating physician. Coverage is governed by Local Coverage Determinations (LCDs) issued by each Medicare Administrative Contractor (MAC). LCDs vary by jurisdiction, so always confirm coverage criteria with your specific MAC before relying on national estimates.

The work RVU for 95911 is 2.44, with a total RVU of approximately 6.59. Estimated Medicare payment falls around $220 per session, though this figure shifts with each year’s conversion factor and geographic locality adjustment. Verify current rates through the CMS Physician Fee Schedule search tool for your specific MAC region.

Frequency limits and medical necessity

Medicare and commercial payers do not set a universal frequency limit for NCS in all clinical scenarios. Aetna, however, follows the American Association of Neuromuscular and Electrodiagnostic Medicine (AANEM) maximum-study recommendations for electrodiagnostic (EDX) coverage determinations.

According to Aetna’s Clinical Policy Bulletin 0502, the number of NCS studies considered necessary is benchmarked against AANEM’s diagnostic-category guidelines.

State Medicaid programs can also impose their own frequency and documentation rules that differ from Medicare. Medi-Cal (California Medicaid), for example, applies coverage and provider conditions specific to electrodiagnostic testing that a national Medicare estimate won’t capture.

Always verify your state Medicaid program’s limits separately from Medicare LCDs. Practices with strong HIPAA-compliant documentation practices are better positioned to defend frequency-related audits.

Streamline your neurology billing documentation

Pabau helps neurology practices build structured NCS report templates, capture nerve-by-nerve documentation at the point of care, and manage claims workflows, so your team spends less time on rework and more time with patients.

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Payer-specific policies: Aetna, Anthem, and Medi-Cal

Commercial payer rules for NCS billing diverge in ways that matter to neurology billing teams. Understanding three major payers illustrates the key differences to watch.

Aetna

Aetna ties EDX coverage to AANEM’s maximum recommended study counts by diagnostic category. Submitting more studies than AANEM recommends for a given diagnosis increases denial risk, so the interpreting physician’s report must document which diagnostic category applies and why the study count is medically justified.

For CPT Code 95911, 9-10 studies is within the range Aetna considers appropriate for polyneuropathy evaluations, but it may exceed their threshold for isolated mononeuropathy workups.

Anthem

Anthem’s Medical Policy CG-MED-24 addresses electromyography and nerve conduction studies. Anthem requires that NCS be medically necessary, performed by or under the direct supervision of a qualified physician, and supported by documented clinical indications.

The policy lists covered diagnoses and study types, so review the current version of CG-MED-24 through Anthem’s provider portal before submitting 95911 claims. Pairing NCS with the right diagnosis code, such as the ICD-10 code for lumbar disc disorder with radiculopathy, helps establish medical necessity.

Medi-Cal

Medi-Cal restricts billing of CPT codes 95907-95913 to credentialed providers only. The Medi-Cal Provider Manual specifies that these codes, along with 95924, 95940, 95941, and 95943, are reimbursable only to providers who have completed a neurology or physical medicine and rehabilitation (PM&R) residency, with a certification attestation attached to the claim.

Practices treating Medi-Cal patients should verify their credentialing status before billing the NCS ladder. Pairing each claim with a well-documented diagnosis, such as the ICD-10 code for type 2 diabetes with diabetic neuropathy, supports medical necessity and helps prevent avoidable denials.

EMG and NCS bundling: Billing CPT 95911 with 95885 and 95886

NCS and EMG studies are frequently performed in the same session. Whether they can be billed together on the same date of service depends on current National Correct Coding Initiative (NCCI) edits, which CMS updates quarterly.

As of available guidance, CPT Code 95911 can generally be billed with EMG codes 95885 (limited EMG) and 95886 (complete EMG) on the same date, but Modifier 59 or XU may be required to indicate that the procedures are distinct services. Verify the current NCCI edit table before billing both codes together, as edit status changes.

The key distinction for bundling purposes is that NCS measures nerve signal transmission velocity and amplitude electrically, while EMG assesses muscle electrical activity with needle insertion. The two evaluate different physiological systems and are clinically complementary for a full electrodiagnostic workup.

Payers generally recognize this distinction, but documentation must clearly reflect that both services were separately indicated and performed. Coders can cross-reference the CCSD code for EMG and nerve conduction studies when mapping these services, and the same distinct-service scrutiny applies to other screenings, such as the ADHD screening CPT code.

Modifier requirements for CPT Code 95911

Two modifiers come up consistently in NCS billing: Modifier 25 and Modifier 59.

Modifier 25: Same-day E/M and NCS

When a physician performs both an evaluation and management (E/M) service (such as CPT 99205) and NCS on the same date, Modifier 25 should be appended to the E/M code to indicate a significant, separately identifiable service.

A Texas Department of Insurance medical fee dispute case (Case M4241188, January 2024) involved exactly this scenario: the billing of CPT 99205-25 alongside NCS codes including 95911. The requirement is generally accepted across payers, though some may deny or retract the E/M if Modifier 25 is missing.

Always append Modifier 25 to the E/M when a diagnostic procedure like NCS is billed on the same day. Use claims management software that supports modifier tracking at the claim level to reduce this type of denial.

Modifier 59: Distinct procedural service

Modifier 59 (or its more specific X-modifiers: XE, XS, XP, XU) is used when billing NCS and EMG together to indicate they are distinct services not typically reported together. When NCCI edits pair 95911 with an EMG code as a bundled edit, Modifier 59 or XU signals to the payer that the procedures qualify for separate payment under that encounter.

Use it only when clinically appropriate and when documentation supports two distinct, separately indicated services.

Common CPT Code 95911 billing errors and compliance tips

Denial patterns in NCS billing tend to cluster around the same root causes, and recognizing them before submission is more efficient than working denials after the fact. The AAPC Codify platform provides code-level guidance and crosswalk tools that neurology billing teams use to cross-check their coding decisions.

Practices that invest in neurology practice management software with built-in billing workflows can catch many of these errors before claims go out.

Conclusion

Most NCS billing denials trace back to two recurring issues: unclear procedure reports and nerve-counting errors. When the documentation names every nerve tested and the coder applies CMS Article A56619’s one-nerve-one-study rule, CPT Code 95911 claims go through cleanly.

Pabau’s claims management tools give neurology practices structured workflows to attach procedure notes, track modifier requirements, and manage claim-level compliance before submission. Book a demo to see how Pabau handles neurology billing documentation end to end.

Continue your research

Testing more than 10 nerves? CPT Code 95913: nerve conduction studies, 13 or more covers the top rung of the NCS ladder and when to move up from 95911.

Frequently asked questions