J38.02

🧬 ICD-10 CM J38.02 — Paralysis of Vocal Cords and Larynx, Bilateral

Billable Code Confirmed

ICD-10 CM J38.02 is a valid, billable 5-character ICD-10-CM diagnosis code for FY2026. Characters 1-3 (J38) identify the category as Diseases of vocal cords and larynx, not elsewhere classified; character 4 (0) identifies the paralysis subcategory; and character 5 (2) specifies bilateral involvement. No additional characters are required — this is a terminal code. The laterality axis is fully encoded within the subcategory digit, distinguishing this from J38.00 (unspecified) and J38.01 (unilateral).

Non-Billable Parent Codes — Never Submit These

• ❌ J38 — 3-character header — no specificity for disease type or laterality
• ❌ J38.0 — 4-character header — identifies paralysis category but lacks required laterality specification

Always submit J38.02 (all 5 characters) when bilateral vocal cord and/or laryngeal paralysis is clearly documented. If only one side is documented, use J38.01. Use J38.00 only when laterality is genuinely not documented and a query is not possible.

Clinical Context: Bilateral Paralysis Is a Distinct Airway Emergency

ICD-10 CM J38.02 captures paralysis of both vocal cords and/or the larynx bilaterally — a condition with profoundly different clinical implications than unilateral paralysis. While unilateral paralysis (J38.01) primarily causes dysphonia, bilateral paralysis presents a significant airway obstruction risk because both cords may rest in or near the paramedian position, severely narrowing the glottic aperture. This distinction drives different management pathways (tracheostomy, arytenoidectomy, cordotomy) and different inpatient DRG groupings.

Code Classification

ICD-10 CM Diagnosis Code — wRVU, assistant-at-surgery payability, and global period fields are not applicable to diagnosis codes. For inpatient procedural crosswalk, see the ICD-10 PCS Crosswalk section. For outpatient procedure coding paired with this diagnosis, see the Commonly Associated CPT Codes section.

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🔍 Code Description

ICD-10 CM J38.02 classifies bilateral paralysis of the vocal cords and larynx — a condition in which both vocal cords are rendered immobile due to neurological, structural, or iatrogenic disruption of the motor pathways supplying the larynx, most critically the bilateral recurrent laryngeal nerves (RLNs).^1,2 Unlike unilateral paralysis, bilateral involvement frequently results in a compromised airway because the paralyzed cords tend to rest in the paramedian or median position, reducing the glottic inlet to a narrow slit insufficient for adequate ventilation.³

The most common etiologies include post-thyroidectomy bilateral RLN injury, malignant invasion (thyroid, esophageal, lung), neurological diseases (brainstem lesions, CNS demyelinating disease, ALS), and idiopathic causes.³ Always code the underlying cause alongside J38.02 — the etiology is not captured by this code and must be reported separately to reflect true clinical complexity and support medical necessity.¹

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🌳 Code Tree / Hierarchy

J38 — Diseases of vocal cords and larynx, not elsewhere classified ❌ Non-billable
│
├── J38.0 — Paralysis of vocal cords and larynx ❌ Non-billable (requires 5th character)
│   ├── J38.00 — Paralysis of vocal cords and larynx, unspecified ✅ Billable
│   ├── J38.01 — Paralysis of vocal cords and larynx, unilateral ✅ Billable
│   └── J38.02 — Paralysis of vocal cords and larynx, bilateral ◀ THIS CODE ✅ Billable
│
├── J38.1 — Polyp of vocal cord and larynx ✅ Billable
├── J38.2 — Nodules of vocal cords ✅ Billable
├── J38.3 — Other diseases of vocal cords ✅ Billable
├── J38.4 — Edema of larynx ✅ Billable
├── J38.5 — Laryngeal spasm ✅ Billable
├── J38.6 — Stenosis of larynx ✅ Billable
└── J38.7 — Other diseases of larynx ✅ Billable

Laterality Is Clinically and Operationally Critical Here

Never use J38.00 (unspecified) when the medical record — including operative reports, laryngoscopy findings, or neurology consult notes — documents bilateral involvement. Unspecified codes are a payer audit target and may trigger claim denials or queries for additional documentation. Always query the provider before discharge if laterality is not stated but bilateral involvement is clinically evident.

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✅ Includes

The following clinical terms and scenarios map to J38.02 when documented:^1,2

• Bilateral vocal cord paralysis (BVCP)
• Bilateral laryngeal paralysis
• Bilateral recurrent laryngeal nerve (RLN) paralysis or palsy
• Bilateral vocal cord immobility (when provider documents paralysis as the etiology)
• Bilateral abductor paralysis of the vocal cords (cords fixed in midline/paramedian — most dangerous for airway)
• Bilateral adductor paralysis of the vocal cords (cords fixed in abducted position — less airway risk, more dysphonia/aspiration)

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❌ Excludes

Excludes 1 — Cannot Be Coded Simultaneously with J38.02

Code	Description	Note
J38.00	Paralysis of vocal cords and larynx, unspecified	Mutually exclusive — if laterality is documented as bilateral, J38.00 is incorrect and cannot be coded alongside J38.02. Use J38.02 exclusively when bilateral is documented.
J38.01	Paralysis of vocal cords and larynx, unilateral	Mutually exclusive — one side vs. both sides are distinct anatomical presentations. Cannot code unilateral and bilateral paralysis simultaneously for the same condition. If a patient has sequential injuries resulting in bilateral paralysis, J38.02 is the single correct code.

Excludes 1 Violation Risk

The most common violation occurs when a coder assigns J38.01 for a known unilateral paralysis case and then adds J38.02 when a second-side injury is later documented in the same encounter. Once both cords are confirmed paralyzed in the same episode, the single correct code is J38.02 — do not report J38.01 and J38.02 together for the same laryngeal paralysis condition.

Excludes 2 — May Be Coded in Addition if Separately Present

Code	Description	Note
No Excludes 2 notations in FY2026 tabular	—	Code any separately documented respiratory, neurological, or neoplastic conditions per standard ICD-10-CM guidelines alongside J38.02.

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📋 Clinical Overview

Bilateral vs. Unilateral Paralysis — Code Selection and Clinical Impact

Selecting J38.02 vs. J38.01 is not merely a laterality distinction — it reflects fundamentally different clinical presentations, management pathways, and inpatient resource intensity.

Feature	J38.02 — Bilateral	J38.01 — Unilateral	J38.00 — Unspecified
Primary Symptom	Inspiratory stridor, dyspnea, airway obstruction	Dysphonia, breathy voice, aspiration risk	Unknown — query before using
Airway Risk	High — both cords near midline in abductor paralysis	Low to moderate — contralateral cord compensates	Unknown
Voice Quality	May be near-normal (cords close enough for phonation)	Hoarse, breathy, weak	Unknown
Common Etiology	Post-thyroidectomy bilateral RLN injury, malignancy, CNS disease	Post-thyroidectomy unilateral RLN injury, idiopathic, viral	Not yet specified
Typical Management	Tracheostomy, arytenoidectomy, cordotomy, lateralization	Voice therapy, injection augmentation, medialization thyroplasty	Workup pending
Inpatient DRG Impact	May group to DRG 011-013 if tracheostomy performed	Medical DRG 152-154 unless surgical procedure performed	Medical DRG 152-154

CDI Query Trigger — Always Clarify Bilateral vs. Unilateral

When laryngoscopy reports document “bilateral vocal cord hypomobility,” “bilateral cord fixation,” or “bilateral RLN injury,” confirm with the provider whether this represents true paralysis vs. paresis (partial weakness) — as paresis is also captured by J38.02 when documented as paralysis. If documentation is ambiguous between paresis and paralysis, query before coding.

Manifestations & Symptom Burden

Common presenting features and associated conditions coded alongside J38.02:³

• Inspiratory stridor / Acute airway distress: Most dangerous manifestation of bilateral abductor paralysis — may necessitate emergency tracheostomy; do not code stridor separately per Excludes1 if it is integral to J38.02
• Dysphonia / Voice changes: May paradoxically be mild in bilateral abductor paralysis (cords meet for phonation); severe in adductor paralysis
• Aspiration / Dysphagia: Bilateral laryngeal motor dysfunction impairs laryngeal closure during swallowing — code J69.0 (pneumonitis due to inhalation of food/vomit) or R13.10 (dysphagia, unspecified) if separately documented and clinically significant
• Post-thyroidectomy status: If bilateral VCP follows thyroid surgery, sequence J38.02 with appropriate postprocedural complication code or underlying thyroid condition (e.g., E04.1, E04.2, C73)
• Neurological etiology: CNS or peripheral nerve disease driving bilateral VCP should be coded to its highest specificity (e.g., ALS G12.21, MS G35.A, brainstem neoplasm)

Coding the Underlying Etiology

Always code the cause of bilateral VCP alongside J38.02. ICD-10-CM convention requires coding the underlying disease — malignancy, neurological condition, or postprocedural injury — in addition to J38.02. This is critical for DRG weight optimization: an underlying malignancy or CNS disease coded as secondary may qualify as a CC or MCC, raising DRG weight within the medical family.

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💰 HCC Risk Adjustment (CMS-HCC v28)

Field	Detail
CMS-HCC Model Version	v28 (2024-2026 Implementation)
HCC Assignment	❌ Not HCC-Mapped
HCC Category	N/A
RAF Coefficient	N/A

J38.02 does not map to a payment HCC under CMS-HCC v28.⁴ However, the underlying etiologies are frequently HCC-mapped — thyroid malignancy (C73), lung cancer, CNS neoplasms, ALS (G12.21), and multiple sclerosis (G35.A) all carry HCC assignments and should be coded to their full specificity alongside J38.02.

Maximize HCC Capture via Etiology Coding

While J38.02 itself carries no HCC weight, the conditions causing it often do. In a Medicare Advantage patient with bilateral VCP secondary to ALS or thyroid malignancy, accurate and complete coding of the underlying diagnosis is essential for annual RAF score capture. Always code the etiology — never let J38.02 stand alone without an underlying cause if one is documented.

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🏥 MS-DRG Assignment

MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat⁵

DRG	Title	Est. Relative Weight*
DRG 152	Otitis Media and URI with MCC	~0.80 - 0.95
DRG 153	Otitis Media and URI with CC	~0.65 - 0.75
DRG 154	Otitis Media and URI without CC/MCC	~0.55 - 0.65

Surgical DRG Pathway — If Tracheostomy Performed:

DRG	Title	Est. Relative Weight*
DRG 011	Tracheostomy for Face, Mouth and Neck Diagnoses with MCC	~3.50 - 4.20
DRG 012	Tracheostomy for Face, Mouth and Neck Diagnoses with CC	~2.20 - 2.80
DRG 013	Tracheostomy for Face, Mouth and Neck Diagnoses without CC/MCC	~1.60 - 1.90

Approximate. Verify against IPPS FY2026 Final Rule tables. Weights vary by hospital wage index and case mix.

Tracheostomy Dramatically Changes DRG Weight

Bilateral vocal cord paralysis is one of the leading diagnoses requiring emergent or planned tracheostomy for airway management — and that single operative procedure shifts the case from a ~0.55-0.95 RW medical DRG to a ~1.60-4.20 RW surgical DRG (DRGs 011-013). Always confirm with the OR log and anesthesia record whether a tracheostomy or other airway surgical procedure was performed. Failure to capture the PCS tracheostomy code is a significant revenue integrity risk.

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🔗 Related ICD-10-CM Codes

J38.0 — Laterality Variants

Code	Description
J38.02	Paralysis of vocal cords and larynx, bilateral ← This Code
J38.01	Paralysis of vocal cords and larynx, unilateral
J38.00	Paralysis of vocal cords and larynx, unspecified

Common Etiologies — Always Code Alongside J38.02

Code	Description
C73	Malignant neoplasm of thyroid gland
G12.21	Amyotrophic lateral sclerosis (ALS)
G35	Multiple sclerosis
E89.2	Postprocedural hypoparathyroidism (post-thyroidectomy context)
J38.6	Stenosis of larynx (may coexist as a secondary effect of chronic bilateral paralysis)
J69.0	Pneumonitis due to inhalation of food and vomit (aspiration complication)

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🛠️ Commonly Associated CPT Codes (Otolaryngology / ENT)

Outpatient and Profee Setting Context

J38.02 in the outpatient setting primarily pairs with diagnostic and functional assessment CPT codes, as well as surgical laryngoscopy codes when office-based or ASC procedures are performed for airway management. Modifier -25 is required on the E/M when a laryngoscopy is performed on the same date of service.

CPT Code	Description	Profee Coding Notes
31575	Laryngoscopy, flexible; diagnostic	Primary diagnostic tool for bilateral VCP evaluation; no Modifier -26 (global procedure in office setting)
92520	Laryngeal function studies	Separately reportable acoustic and aerodynamic analysis of laryngeal function; pairs with J38.02 for voice/airway functional assessment
31560	Laryngoscopy, direct; with arytenoidectomy	Surgical airway widening procedure for bilateral abductor paralysis; high association with J38.02
31561	Laryngoscopy, direct; with arytenoidectomy with operating microscope or telescope	More specific operative approach than 31560; requires documentation of microscope/telescope use
31540	Laryngoscopy, direct operative; with excision of tumor or laryngocele	May be used when resection is performed for associated lesion
31600	Tracheostomy, planned (separate procedure)	Frequently required for bilateral VCP with acute airway compromise; report separately from laryngoscopy codes
95870	Needle electromyography; larynx	Laryngeal EMG to evaluate recurrent laryngeal nerve integrity and prognosis for recovery in bilateral VCP

NCCI Bundling Considerations

• CPT 92520 (laryngeal function studies) billed on the same day as an operative laryngoscopy is subject to NCCI bundling — document separate clinical indication and apply Modifier -59 only if services are genuinely distinct and separately documented.
• E/M codes (99213-99215) billed on the same day as 31575 require Modifier -25 on the E/M to reflect a significant, separately identifiable decision-making service beyond the pre/post-service work of the laryngoscopy.
• CPT 31560 or 31561 (arytenoidectomy) and 31600 (tracheostomy) billed together: these are typically not bundled — each represents a distinct operative service — but confirm against current NCCI edit tables, as same-session airway procedures may be reviewed for medical necessity.

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🔬 ICD-10-PCS Crosswalk (Inpatient Procedures)

When J38.02 is an inpatient diagnosis, these PCS codes are relevant for associated inpatient procedures.⁵

PCS Section	Body System	Root Operation	Clinical Application
0 (Medical and Surgical)	B (Respiratory System)	1 (Bypass)	Tracheostomy for airway protection — 0B110Z4 (open, no device, cutaneous) or 0B110F4 (with synthetic substitute) — critical PCS code that shifts case to DRG 011-013
0 (Medical and Surgical)	C (Mouth and Throat)	S (Reposition)	Arytenoid lateralization (reposition) to widen glottic aperture — 0CS50ZZ (open approach)
0 (Medical and Surgical)	C (Mouth and Throat)	B (Excision)	Arytenoidectomy (endoscopic excision of arytenoid cartilage) — 0CB53ZZ (percutaneous approach) or 0CB58ZZ (open)
0 (Medical and Surgical)	C (Mouth and Throat)	D (Extraction)	Vocal cord cordotomy/laser excision for glottic widening — percutaneous endoscopic approach

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💊 Coding Scenarios and Examples

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Scenario 1 — Outpatient/Clinic: Post-Thyroidectomy Bilateral VCP Discovered at Follow-Up

Clinical Vignette: A 52-year-old female presents to the ENT clinic 3 weeks after total thyroidectomy for multinodular goiter. She reports significant shortness of breath with exertion and a muffled voice. Flexible fiberoptic laryngoscopy reveals bilateral vocal cord immobility with both cords fixed in the paramedian position and a markedly narrowed glottic aperture. The surgeon documents “bilateral vocal cord paralysis, post-thyroidectomy bilateral RLN injury.” Laryngeal function studies and laryngeal EMG are ordered to assess prognosis.

CPT / Profee Codes:

• 99215-25 — Office E/M, established patient, high complexity (Modifier -25 — significant, separately identifiable service from procedure)
• 31575 — Flexible diagnostic laryngoscopy (Primary diagnostic confirmation of bilateral paralysis)
• 92520 — Laryngeal function studies (Separately ordered and performed — acoustic/aerodynamic analysis)
• 95870 — Needle EMG, larynx (If performed same day — document separate clinical indication; Modifier -59 if bundling edit applies)

ICD-10-CM:

• J38.02 — Paralysis of vocal cords and larynx, bilateral (Primary diagnosis)
• E89.2 — Postprocedural hypoparathyroidism (Code if hypocalcemia from thyroidectomy is also present and documented)
• Z90.09 — Acquired absence of other part of head and neck (Post-thyroidectomy status — code if documented and clinically relevant)

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Scenario 2 — Inpatient: Bilateral VCP with Emergency Tracheostomy

Clinical Vignette: A 61-year-old male with known ALS presents to the ED via EMS in acute respiratory distress with audible inspiratory stridor and oxygen saturation of 82% on room air. ENT is emergently consulted. Flexible laryngoscopy at bedside confirms bilateral vocal cord paralysis with near-complete glottic obstruction. The patient is taken emergently to the OR for tracheostomy. He is admitted to the ICU for ventilator weaning and post-op monitoring.

Principal Diagnosis:

• J38.02 — Paralysis of vocal cords and larynx, bilateral (Reason for admission — airway emergency)

Secondary Diagnoses:

• G12.21 — Amyotrophic lateral sclerosis (Underlying etiology — MCC; drives DRG weight elevation)

Procedure (ICD-10-PCS):

• 0B110Z4 — Bypass trachea to cutaneous, open approach (Tracheostomy — this single PCS code shifts the entire case from DRG 152-154 to DRG 011)

MS-DRG Assignment: With G12.21 (ALS) as an MCC secondary diagnosis and the tracheostomy PCS code, this case groups to DRG 011 — Tracheostomy for Face, Mouth and Neck Diagnoses with MCC, carrying an estimated relative weight of ~3.50-4.20. Failure to capture the tracheostomy PCS code would result in grouping to DRG 152 (~0.80-0.95 RW) — a potentially significant underpayment.

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Scenario 3 — CDI Query: “Bilateral Vocal Cord Hypomobility” Without Explicit Paralysis Language

Clinical Vignette: A 47-year-old female is admitted after thyroid cancer surgery. The ENT consult note documents: “Bilateral vocal cord hypomobility noted on bedside laryngoscopy — likely bilateral RLN neuropraxia vs. paralysis. Will observe.” Discharge summary from the attending states “bilateral vocal cord dysfunction, post-op.” The coder is uncertain whether J38.02 (paralysis), a paresis/weakness code, or a symptom code is appropriate.

Action / Outcome: The term “hypomobility” and “dysfunction” are not equivalent to “paralysis” in ICD-10-CM — coding guidelines require the coder to query the provider before assigning J38.02 when the documentation does not explicitly state “paralysis” or a clear clinical synonym. A CDI query is required to clarify whether the provider’s clinical impression meets the threshold for “paralysis” vs. a lesser degree of impairment.

Query Response: Provider updates the discharge summary to confirm: “Bilateral vocal cord paralysis, bilateral RLN injury, post-total thyroidectomy for papillary thyroid carcinoma.”

Corrected ICD-10-CM Coding:

• J38.02 — Paralysis of vocal cords and larynx, bilateral (Now confirmed after CDI clarification)
• C73 — Malignant neoplasm of thyroid gland (Underlying etiology — thyroid cancer that prompted the surgery)

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⚠️ Coding Pitfalls and Tips

	Pitfall or Tip
❌	Don’t use J38.00 (unspecified) when bilateral is documented. Unspecified codes are audit targets — if the laryngoscopy report, operative note, or attending documentation clearly states “bilateral,” J38.02 is mandatory. Unspecified laterality is not a safe fallback when the information is available in the record.
❌	Don’t let J38.02 stand alone without an etiology code. ICD-10-CM convention requires coding the underlying cause when known. A standalone J38.02 with no etiology code is an incomplete record that weakens medical necessity and misses potential CC/MCC capture from the underlying disease.
❌	Don’t forget to check for tracheostomy in the OR log. Missing the PCS tracheostomy code means the case incorrectly groups to a low-weight medical DRG instead of DRG 011-013. This is one of the highest-impact coding omissions for bilateral VCP admissions.
✅	Query for “paralysis” vs. “paresis” vs. “hypomobility.” These are not interchangeable in ICD-10-CM. If documentation uses vague language like “vocal cord dysfunction,” “hypomobility,” or “reduced movement,” a CDI query is warranted before assigning J38.02.
✅	Code ALS, malignancy, or CNS disease alongside J38.02. These frequently function as MCCs when sequenced secondarily, elevating the DRG from 154 (without CC/MCC) to 152 (with MCC) — a meaningful weight difference even within the medical DRG family.
✅	Modifier -25 is essential when E/M and laryngoscopy are same-day in the office. The ENT evaluation of bilateral VCP is often a significant, separately documentable service — ensure the E/M note reflects independent medical decision-making beyond the procedure’s pre/post service work.

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📚 Sources

1. CMS/NCHS. ICD-10-CM Official Guidelines for Coding and Reporting, FY2026. Centers for Medicare and Medicaid Services and the National Center for Health Statistics. https://www.cms.gov/medicare/coding-billing/icd-10-codes

2. ICD-10-CM Tabular List FY2026 — J38.02, Includes and Excludes notations. ICD-10-CM, 10th ed., CMS/NCHS. Referenced via Unbound Medicine. https://www.unboundmedicine.com/icd/view/ICD-10-CM/886826/all/J38_02___Paralysis_of_vocal_cords_and_larynx__bilateral

3. Tawfik KO, Benson SR, Badgwell D, et al. Bilateral Vocal Cord Paralysis. In: StatPearls. Treasure Island (FL): StatPearls Publishing; updated 2023 Jul 9. https://www.ncbi.nlm.nih.gov/books/NBK560852/

4. CMS. 2025 Model Software/ICD-10 Mappings — CMS-HCC Model v28 ICD-10-CM Mappings. Centers for Medicare and Medicaid Services. https://www.cms.gov/medicare/payment/medicare-advantage-rates-statistics/risk-adjustment/2025-model-software/icd10-mappings

5. CMS. IPPS Final Rule FY2026 — MS-DRG Definitions Manual v43. MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat; DRG 011-013 Tracheostomy logic tables. Centers for Medicare and Medicaid Services.

6. AMA. CPT Professional Edition 2026. Surgery — Respiratory System / Larynx subsection (31560-31600); Medicine / Neurology (92520, 95870). American Medical Association.

7. American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS). CPT for ENT: Chemodenervation of the Larynx — Botulinum Toxin. Updated February 2025. https://www.entnet.org/resource/cpt-for-ent-chemodenervation-of-the-larynx-botulinum-toxin-2/