Resource Center | PtEverywhere

What Physical Therapists Need to Know About CPT Code 31575

Written by PtEverywhere | Mar 17, 2025 4:00:00 AM

For physical therapy professionals and practice owners, understanding medical billing codes is essential to ensuring accurate documentation, seamless reimbursement, and optimized revenue cycles. Among the many CPT codes used in healthcare billing, CPT code 31575 is one that physical therapy practices may encounter when dealing with speech-related therapy and diagnostic evaluations.

This guide will provide an in-depth look at CPT code 31575, including its definition, appropriate use, modifiers, Medicare reimbursement guidelines, and best practices for making the process more streamlined in a physical therapy setting.

What is CPT Code 31575?

CPT code 31575 refers to a diagnostic flexible fiberoptic laryngoscopy. This procedure is performed to examine the larynx (voice box) and assess abnormalities such as vocal cord nodules, polyps, airway obstruction, or issues affecting speech and swallowing.

31575 CPT Code Description

The official CPT code 31575 description is:

Laryngoscopy, flexible fiberoptic; diagnostic.

This means the procedure involves inserting a thin, flexible tube with a light and camera through the nose or mouth to examine the larynx and surrounding structures. This minimally invasive procedure is critical for identifying conditions affecting voice and breathing.

When Should Physical Therapy Professionals Use CPT Code 31575?

While physical therapists do not perform laryngoscopies, they often work with speech-language pathologists (SLPs) and other healthcare providers who do. If your practice includes speech therapy services, it’s important to know when CPT code 31575 applies:

  • Diagnosing speech disorders related to laryngeal dysfunction
  • Assessing breathing or swallowing difficulties
  • Evaluating hoarseness or voice abnormalities
  • Investigating throat pain or unexplained chronic coughing
  • Checking for masses, tumors, or structural irregularities in the vocal cords

Since speech therapy is commonly integrated with physical therapy for neurorehabilitation or post-stroke recovery, understanding when and how to document CPT code 31575 can help practices ensure correct billing and compliance.

Does CPT Code 31575 Require a Modifier?

Modifiers are two-digit codes added to CPT codes to provide additional information about a procedure. When billing for CPT code 31575, the following modifiers may apply:

  • Modifier 22 – Increased Procedural Services: Used if the laryngoscopy was more complex than usual due to anatomical variations or other complicating factors.
  • Modifier 52 – Reduced Services: Applied when the procedure was only partially completed (e.g., patient discomfort prevented full examination).
  • Modifier 59 – Distinct Procedural Service: Used if CPT code 31575 was performed separately from other procedures done on the same day.

Physical therapy professionals working alongside SLPs or ENTs should ensure that billing teams are aware of these modifiers to prevent claims denials or underpayment.

CPT Code 31575 Medicare Reimbursement

Understanding Medicare reimbursement is crucial for maximizing revenue. CPT code 31575 is covered under the Medicare Physician Fee Schedule (MPFS), meaning that reimbursement is possible if certain conditions are met:

  • The procedure must be medically necessary and properly documented.
  • The claim must align with local Medicare Administrative Contractor (MAC) policies.
  • The documentation should clearly outline why the procedure was performed, including patient history and symptoms.

Since Medicare guidelines vary by region, it’s always advisable to check with the local MAC to ensure compliance and proper payment.

Common Challenges in Billing CPT Code 31575 & How to Overcome Them

1. Documentation Errors

One of the biggest challenges in billing CPT code 31575 is ensuring accurate documentation. Patient symptoms, medical history, and the necessity of the procedure must be clearly recorded. Using electronic medical records (EMRs) can help track referrals and ensure that the documentation aligns with payer requirements.

2. Claim Denials Due to Missing Modifiers

Another common issue is claim denials due to missing modifiers. It’s essential to apply the correct modifier when needed and verify insurance payer policies to prevent claim rejections. If a modifier is omitted or incorrectly applied, insurers may bundle CPT code 31575 with other services, leading to lower reimbursements.

3. Reimbursement Delays

Reimbursement delays are another frequent problem. Staying updated on Medicare fee schedules and private insurance policies can help avoid disruptions in cash flow. Additionally, utilizing revenue cycle management (RCM) tools ensures that claims are monitored, follow-ups are conducted, and payments are processed efficiently.

How PtEverywhere Can Help With CPT Code 31575 Billing

Physical therapy professionals and practice owners can simplify CPT code 31575 billing with PtEverywhere, an advanced physical therapy software designed for modern clinics. Here’s how PtEverywhere makes the process easier:

  • Automated Coding SuggestionsEnsures that CPT code 31575 is used correctly and applied to the right services.
  • Integrated EMR & Documentation Keeps track of patient history and medical necessity, reducing documentation errors.
  • Customizable Billing WorkflowsHelps ensure accurate claims submission with the correct modifiers and payer-specific requirements.
  • Medicare Compliance Tracking Alerts your practice to Medicare reimbursement guidelines and local MAC policies.
  • Revenue Cycle Management (RCM) Provides real-time tracking of claims, payments, and denials, ensuring maximum reimbursement.
  • Claims Optimization FeaturesReduces denials and delays by flagging potential coding errors before submission.

With PtEverywhere, practice owners can minimize claim rejections, streamline documentation, and optimize revenue cycles, ensuring smooth and efficient billing for CPT code 31575.

Final Thoughts

For physical therapy professionals incorporating speech therapy services, understanding CPT code 31575 is essential for proper billing, reimbursement, and documentation. 

By staying up to date on coding requirements, Medicare policies, and modifier use, practices can avoid denials and maximize revenue. 

Implementing PtEverywhere can further streamline billing workflows, ensuring accurate claims submission and improved financial outcomes.