CPT 95937: Neuromuscular Junction Testing by Repetitive Stimulation

Medicare pays $74 on average nationally for this procedure.

CPT code 95937 describes neuromuscular junction testing performed by repetitive stimulation of a nerve supplying a muscle to evaluate or diagnose known or suspected disorders of the neuromuscular junction; this is an electrodiagnostic service typically provided by a neurologist or physiatrist in an outpatient clinic, hospital electrodiagnostic lab, or ambulatory surgery center using repetitive nerve stimulation techniques to assess neuromuscular transmission.

For related coverage guidance, see recent payer policy updates: Lumbar Microdiscectomy, Artificial Cervical Intervertebral Disc, Lumbar Decompression.

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CPT 95937: Neuromuscular Junction Testing by Repetitive Stimulation

Medicare pays $74 on average nationally for this procedure.

For related coverage guidance, see recent payer policy updates: Lumbar Microdiscectomy, Artificial Cervical Intervertebral Disc, Lumbar Decompression.

Customize your policy alerts

Sign up for cpt 95937 policy alerts

Get alerted when payer policies referencing 95937 are released or updated.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult referred to neurology for evaluation of fluctuating skeletal muscle weakness, ptosis, diplopia, or fatigable weakness that suggests a disorder of the neuromuscular junction such as myasthenia gravis or Lambert-Eaton myasthenic syndrome. The clinical workflow includes a focused history and neurologic exam, review of prior antibody testing (e.g., acetylcholine receptor or MuSK), and selection of target muscle(s) for testing. Repetitive nerve stimulation (RNS) is scheduled in an electromyography (EMG)/nerve conduction study (NCS) laboratory or outpatient neuromuscular clinic. The patient is positioned, skin prepared, and surface electrodes placed over the stimulating nerve and the target muscle. Baseline compound muscle action potentials (CMAPs) are recorded, then the nerve is stimulated repetitively at specified frequencies (commonly 2–5 Hz). The provider documents pre- and post-test CMAP amplitudes and decremental or incremental responses. Findings consistent with a significant decrement (typically ≥10% at low-rate stimulation) support a diagnosis of a neuromuscular junction disorder and guide further management, such as serologic testing, thymoma imaging, or medication adjustments. Typical site of service is an outpatient EMG/NCS laboratory, neurology clinic, or hospital neurophysiology lab. Service type is diagnostic electrodiagnostic testing specific to neuromuscular junction assessment.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`95886`	Needle electromyography, 1 extremity with or without related paraspinal areas; initial needle examination	Performed before or after RNS to assess muscle electrical activity and help localize neuromuscular vs. myopathic pathology.
`95885`	Needle electromyography, 1 extremity with or without related paraspinal areas; subsequent needle examination	Used for follow-up or additional needle EMG sampling in the same encounter when further evaluation is needed.
`95938`	Repetitive nerve stimulation testing, each additional muscle (List separately in addition to code for primary muscle)	Billed in addition to the primary RNS code when multiple muscles are tested during the same session.
`95905`	Nerve conduction, amplitude and latency/velocity study; peroneal motor and sural sensory, etc. (example of NCS codes)	Standard nerve conduction studies are often performed alongside RNS to evaluate peripheral nerve function and rule out neuropathy.
`99070`	Supplies and materials (noncovered)	May be used by facilities to account for disposable supplies used during electrodiagnostic testing.

Related Modifiers

5 rows

Modifier	Description	When to Use
26	Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…	- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
59	Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…	- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
52	Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…	- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
53	Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…	- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
23	Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…	- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207RH0000X	Hematology (Internal Medicine) Physician	An internist with additional training who specializes in diseases of the blood, spleen and lymph. This specialist treats conditions such as anemia, cl…
2084P0800X	Psychiatry Physician	A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, …
208000000X	Pediatrics Physician	A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
363L00000X	Nurse Practitioner	(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
372500000X	Chore Provider	An individual who provides home maintenance services required to sustain a safe, sanitary living environment for individuals who because of age or dis…
125Q00000X	Oral Medicine Dentistry	Oral Medicine is the specialty of dentistry responsible for the oral health care of medically complex patients and for the diagnosis and management of…
2088P0231X	Pediatric Urology Physician	Surgeons who can diagnose, treat, and manage children's urinary and genital problems. A pediatric urologist devotes a minimum of 50% of his or her pra…
261QA0900X	Amputee Clinic/Center	An entity, facility, or distinct part of a facility providing counseling, fitting, custom design, prescriptive, and training services related to conge…

Related ICD-10-CM Codes

21 rows

ICD-10-CM Code	Description
D86.1	Sarcoidosis of lymph nodes
E11.40	Type 2 diabetes mellitus with diabetic neuropathy, unspecified
F44.4	Conversion disorder with motor symptom or deficit
G12.21	Amyotrophic lateral sclerosis
G12.22	Progressive bulbar palsy
G58.9	Mononeuropathy, unspecified
G60.9	Hereditary and idiopathic neuropathy, unspecified
G61.0	Guillain-Barre syndrome
G61.81	Chronic inflammatory demyelinating polyneuritis
G70.00	Myasthenia gravis without (acute) exacerbation

Showing 1–10 of 21

Related Payer Policy Updates

Specialty: Neurology/Neurosurgery1 / 2

10 rows

Policy	Payer	Effective Date
Lumbar Microdiscectomy	univerahealthcare	2026-10-15
Artificial Cervical Intervertebral Disc	univerahealthcare	2026-10-15
Lumbar Decompression	univerahealthcare	2026-10-15
Nerve Fiber Density Testing (IENFD/ENFD) Coverage Criteria	Oscar Health	2026-10-01
Biomarker Testing for Multiple Sclerosis and Related Neurologic Diseases	Oscar Health	2026-10-01
Biochemical Markers of Alzheimer Disease and Dementia	Oscar Health	2026-10-01
Serum Testing For Evidence of Mild Traumatic Brain Injury	Oscar Health	2026-10-01
Evaluation of Cerebrospinal Fluid, Urine and Plasma for Alzheimer Disease	Bluecross Idaho	2026-09-01
Prior Authorization of Spinal Procedures	Blue Cross Blue Shield - Rhode Island	2026-09-01
Alzheimer's Disease - Amyloid Beta- Directed Antibodies - Kisunla	Cigna	2026-08-15

CPT 95925: Short‑Latency SSEP Study, Upper Limbs

CPT-95926-LOWER-LIMB-SHORT-LATENCY-SSEP

CPT 95926: Short‑Latency Somatosensory Evoked Potentials, Lower Limbs

CPT-95927-SHORT-LATENCY-SOMATOSENSORY-EVOKED-POTENTIAL-STUDY

CPT 95927: Short‑Latency Somatosensory Evoked Potential Study

CPT-95928-CENTRAL-MOTOR-EVOKED-POTENTIAL-UPPER-LIMB

CPT 95928: Central Motor Evoked Potential Study, Upper Limb

CPT-95929-CENTRAL-MOTOR-EVOKED-POTENTIAL-LOWER-LIMB

CPT 95929: Central Motor Evoked Potentials for Lower Limb Evaluation

CPT-95930-VISUAL-EVOKED-POTENTIAL-TESTING

CPT 95930: Visual Evoked Potential Testing

CPT-95933-ORBICULARIS-OCULI-BLINK-REFLEX-ELECTRODIAGNOSTIC-TEST

CPT 95933: Orbicularis Oculi (Blink) Reflex Electrodiagnostic Test

CPT-95938-SHORT-LATENCY-SSEP-UPPER-AND-LOWER-LIMBS

CPT 95938: Short‑Latency Somatosensory Evoked Potential, Upper and Lower Limbs

CPT-95939-CENTRAL-MOTOR-EVOKED-POTENTIAL-UPPER-LOWER-LIMBS

CPT 95939: Central Motor Evoked Potential Study for MS/Stroke Prognosis

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`95886`	Needle electromyography, 1 extremity with or without related paraspinal areas; initial needle examination	Performed before or after RNS to assess muscle electrical activity and help localize neuromuscular vs. myopathic pathology.
`95885`	Needle electromyography, 1 extremity with or without related paraspinal areas; subsequent needle examination	Used for follow-up or additional needle EMG sampling in the same encounter when further evaluation is needed.
`95938`	Repetitive nerve stimulation testing, each additional muscle (List separately in addition to code for primary muscle)	Billed in addition to the primary RNS code when multiple muscles are tested during the same session.
`95905`	Nerve conduction, amplitude and latency/velocity study; peroneal motor and sural sensory, etc. (example of NCS codes)	Standard nerve conduction studies are often performed alongside RNS to evaluate peripheral nerve function and rule out neuropathy.
`99070`	Supplies and materials (noncovered)	May be used by facilities to account for disposable supplies used during electrodiagnostic testing.

Related Modifiers

5 rows

Modifier	Description	When to Use
26	Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…	- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
59	Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…	- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
52	Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…	- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
53	Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…	- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
23	Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…	- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207RH0000X	Hematology (Internal Medicine) Physician	An internist with additional training who specializes in diseases of the blood, spleen and lymph. This specialist treats conditions such as anemia, cl…
2084P0800X	Psychiatry Physician	A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, …
208000000X	Pediatrics Physician	A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
363L00000X	Nurse Practitioner	(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
372500000X	Chore Provider	An individual who provides home maintenance services required to sustain a safe, sanitary living environment for individuals who because of age or dis…
125Q00000X	Oral Medicine Dentistry	Oral Medicine is the specialty of dentistry responsible for the oral health care of medically complex patients and for the diagnosis and management of…
2088P0231X	Pediatric Urology Physician	Surgeons who can diagnose, treat, and manage children's urinary and genital problems. A pediatric urologist devotes a minimum of 50% of his or her pra…
261QA0900X	Amputee Clinic/Center	An entity, facility, or distinct part of a facility providing counseling, fitting, custom design, prescriptive, and training services related to conge…

Related ICD-10-CM Codes

21 rows

ICD-10-CM Code	Description
D86.1	Sarcoidosis of lymph nodes
E11.40	Type 2 diabetes mellitus with diabetic neuropathy, unspecified
F44.4	Conversion disorder with motor symptom or deficit
G12.21	Amyotrophic lateral sclerosis
G12.22	Progressive bulbar palsy
G58.9	Mononeuropathy, unspecified
G60.9	Hereditary and idiopathic neuropathy, unspecified
G61.0	Guillain-Barre syndrome
G61.81	Chronic inflammatory demyelinating polyneuritis
G70.00	Myasthenia gravis without (acute) exacerbation

Showing 1–10 of 21

Related Payer Policy Updates

Specialty: Neurology/Neurosurgery1 / 2

10 rows

Policy	Payer	Effective Date
Lumbar Microdiscectomy	univerahealthcare	2026-10-15
Artificial Cervical Intervertebral Disc	univerahealthcare	2026-10-15
Lumbar Decompression	univerahealthcare	2026-10-15
Nerve Fiber Density Testing (IENFD/ENFD) Coverage Criteria	Oscar Health	2026-10-01
Biomarker Testing for Multiple Sclerosis and Related Neurologic Diseases	Oscar Health	2026-10-01
Biochemical Markers of Alzheimer Disease and Dementia	Oscar Health	2026-10-01
Serum Testing For Evidence of Mild Traumatic Brain Injury	Oscar Health	2026-10-01
Evaluation of Cerebrospinal Fluid, Urine and Plasma for Alzheimer Disease	Bluecross Idaho	2026-09-01
Prior Authorization of Spinal Procedures	Blue Cross Blue Shield - Rhode Island	2026-09-01
Alzheimer's Disease - Amyloid Beta- Directed Antibodies - Kisunla	Cigna	2026-08-15

CPT 95925: Short‑Latency SSEP Study, Upper Limbs

CPT-95926-LOWER-LIMB-SHORT-LATENCY-SSEP

CPT 95926: Short‑Latency Somatosensory Evoked Potentials, Lower Limbs

CPT-95927-SHORT-LATENCY-SOMATOSENSORY-EVOKED-POTENTIAL-STUDY

CPT 95927: Short‑Latency Somatosensory Evoked Potential Study

CPT-95928-CENTRAL-MOTOR-EVOKED-POTENTIAL-UPPER-LIMB

CPT 95928: Central Motor Evoked Potential Study, Upper Limb

CPT-95929-CENTRAL-MOTOR-EVOKED-POTENTIAL-LOWER-LIMB

CPT 95929: Central Motor Evoked Potentials for Lower Limb Evaluation

CPT-95930-VISUAL-EVOKED-POTENTIAL-TESTING

CPT 95930: Visual Evoked Potential Testing

CPT-95933-ORBICULARIS-OCULI-BLINK-REFLEX-ELECTRODIAGNOSTIC-TEST

CPT 95933: Orbicularis Oculi (Blink) Reflex Electrodiagnostic Test

CPT-95938-SHORT-LATENCY-SSEP-UPPER-AND-LOWER-LIMBS

CPT 95938: Short‑Latency Somatosensory Evoked Potential, Upper and Lower Limbs

CPT-95939-CENTRAL-MOTOR-EVOKED-POTENTIAL-UPPER-LOWER-LIMBS

CPT 95939: Central Motor Evoked Potential Study for MS/Stroke Prognosis

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

OpenPayer

CPT 95937: Neuromuscular Junction Testing by Repetitive Stimulation

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OpenPayer

CPT 95937: Neuromuscular Junction Testing by Repetitive Stimulation

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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Payer Policy Updates

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Payer Policy Updates

Related Codes

References

CPT 95937: Neuromuscular Junction Testing by Repetitive Stimulation

Sign up for cpt 95937 policy alerts

CPT 95937: Neuromuscular Junction Testing by Repetitive Stimulation

Sign up for cpt 95937 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Payer Policy Updates

Related Codes

What clinical purpose does CPT 95937 serve and where is it typically performed?

Which modifiers are commonly used with CPT 95937 and when are they applied?

What other CPT codes are commonly reported with 95937 during an electrodiagnostic evaluation?

Which ICD-10 diagnoses are relevant when billing CPT 95937?

Which specialties perform CPT 95937 and does the page include payer coverage or reimbursement rates?

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Payer Policy Updates

Related Codes

What clinical purpose does CPT 95937 serve and where is it typically performed?

Which modifiers are commonly used with CPT 95937 and when are they applied?

What other CPT codes are commonly reported with 95937 during an electrodiagnostic evaluation?

Which ICD-10 diagnoses are relevant when billing CPT 95937?

Which specialties perform CPT 95937 and does the page include payer coverage or reimbursement rates?

References