Procedure Complexity
PFT, bronchoscopy and pulmonary rehab each carry their own documentation and bundling rules. Generalist coders misapply them constantly.
Revix MD handles medical billing for pulmonary clinics, respiratory care practices, hospitals and specialty groups across the U.S. – coded around the procedure complexity, payer rules and documentation standards specific to this specialty.

Pulmonary medicine combines diagnostic testing, chronic disease management and procedural intervention into a single billing workflow, and each category carries its own rules. Most denials trace back to one of five pressure points.
Most denials originate before a claim is ever filed. Revix MD owns both halves of the cycle together, not as two disconnected vendors.
As a dedicated pulmonary function test billing company and respiratory billing partner, our coding depth runs across every major pulmonary service line, not a generic specialty checklist.
Accurate billing for pulmonary function tests and spirometry, including pre- and post-bronchodilator testing. We correctly split and append Professional and Technical components (Modifier 26 and Modifier TC) for split-billing environments, so you’re fully reimbursed for both technical throughput and physician interpretation.
Coding support for diagnostic and therapeutic procedures, biopsy components and add-on codes. Our coders check every bronchoscopy claim against NCCI edit pairs before submission, apply multiple-procedure modifiers correctly for multi-lesion biopsies, and catch the unbundling errors that trigger rejections.
Full-service billing support for home respiratory equipment under complex Medicare guidelines. We track capped rental rules, the 36-month oxygen equipment ceiling, and verify the Certificate of Medical Necessity (CMN) at initial setup. Medicare requires a qualifying arterial blood gas or oximetry study under NCD 240.2 before approving home oxygen claims. We confirm that documentation before the claim goes out.
Reimbursement support for chronic respiratory disease populations. We protect your practice from audit triggers on COPD (ICD-10 J44.0 through J44.9) and asthma (ICD-10 J45.20 through J45.998) claims through precise severity documentation. E/M levels stay aligned with the complexity of concurrent clinical testing, which is where most severity-based undercoding happens.
A lot of pulmonology practices run their own sleep labs. We handle that billing through a dedicated service line built for polysomnography coding, CPAP/BiPAP authorization and Medicare compliance tracking.
Revix MD supports pulmonary organizations with specialty-specific billing workflows designed around complex respiratory procedures, payer requirements, and documentation standards.
Our coders work directly within the frameworks that govern pulmonary reimbursement, CMS coverage criteria for pulmonary rehabilitation under NCD 240.8 and NCD 240.9, applicable Local Coverage Determinations (LCDs) for spirometry and bronchoscopy coverage, and the prior authorization standards specific to pulmonary rehab programs and respiratory biologics.
Under NCD 240.8, CMS covers up to 36 one-hour pulmonary rehabilitation sessions over 36 weeks. An additional 36 sessions are allowed only through the KX modifier and documented medical necessity per NCD 240.9. We track each patient’s session count and modifier requirements so claims go out correctly the first time.

Revix MD connects directly to your existing pulmonary EMR and specialty workflow environment – no migration, no dual data entry, no disruption to your clinical staff.
Native connectivity with systems practices run.
Secure, bidirectional clinical-to-billing data exchange that keeps documentation and coding synchronized in real time.
Standardized claim submission and remittance processing, built around payer-specific edits.
Real-time dashboards for claim status. All data is HIPAA-compliant, encrypted end-to-end.
Request a free pulmonology billing audit. We’ll review your denial trends, A/R aging and coding accuracy across PFT, bronchoscopy and respiratory DME. If revenue is leaking, we’ll show you where.
Pulmonology billing covers the full revenue cycle as one workflow, not two disconnected halves. That means eligibility verification, prior authorizations for pulmonary rehab and respiratory biologics, PFT and bronchoscopy coding, clean claim submission, denial management and payment posting.
PFT billing means managing pre- and post-bronchodilator testing and correctly split-billing technical and professional components with Modifier 26 and Modifier TC across CPT 94010–94799. Generalist teams frequently misapply or bundle these codes, leading to underpayment or audits.
Bronchoscopy billing primarily uses CPT 31622-31645. Accurate reimbursement depends on differentiating diagnostic versus therapeutic procedures, capturing surgical biopsy components, and applying multiple-procedure modifiers correctly to avoid compliance risk and improper unbundling rejections.
Oxygen therapy billing requires specific HCPCS codes (E0424–E0466, E0601, E0470, E1390) and is governed by capped rental rules and the 36-month oxygen equipment ceiling. Claims are rejected without a verified Certificate of Medical Necessity from initial setup.
Incomplete documentation for medical necessity is the biggest one. After that, missing prior authorizations for pulmonary rehab and respiratory biologics, unbundling errors across overlapping CPT ranges, and payer-specific session limits for rehab claims that go untracked until the denial shows up 60 days later.
Modifier 25 applies when a physician performs a separately identifiable E/M visit on the same day as a procedure, like an office visit on the same day as a PFT. Modifier 59 applies when two procedures that normally bundle were actually performed as distinct services, at different sites or during separate encounters. We review same-day claims before submission to apply the correct modifier and avoid automatic payer bundling edits.
Revix MD uses a percentage-of-collections model. You pay based on what we actually collect, not a flat monthly retainer. There are no setup fees and no long-term contracts.