CPT Code 94010: Spirometry billing guide for 2026

Key takeaways

CPT Code 94010 covers spirometry with a graphic record, total and timed vital capacity, and expiratory flow rates, with or without maximal voluntary ventilation.

The interpretation must be physician-signed and clinically correlated, because a bare spirometry tracing is the leading denial cause.

Modifier TC bills the technical component alone, modifier 26 bills the interpretation alone, and global billing needs one provider doing both.

The 2026 work RVU is 0.17 in both office and facility settings, so only the practice expense component changes.

Pabau’s claims management software flags incomplete spirometry documentation before submission and tracks 94010 denials by reason.

CPT Code 94010 is spirometry, including the graphic record, total and timed vital capacity, and expiratory flow rate measurements. Maximal voluntary ventilation may be included or left out. It is the code for a baseline lung function test in an office or outpatient setting.

The descriptor is short. Getting paid for it is not, because the interpretation, the modifier, and the diagnosis all have to line up on the same claim. This guide covers the descriptor, covered indications, documentation, Medicare rates, modifiers, related pulmonary codes, and the common denial patterns.

What CPT Code 94010 covers

The American Medical Association (AMA) defines CPT Code 94010 as follows. Spirometry, including graphic record, total and timed vital capacity, expiratory flow rate measurement(s), with or without maximal voluntary ventilation. The code sits in the Pulmonary Diagnostic Testing and Therapies section, which runs from 94010 to 94799.

In practical terms, 94010 is what most providers think of as a basic spirometry test. The table below shows which components the code expects and which one is optional.

The phrase “with or without” MVV carries some weight. You do not have to perform MVV to bill 94010. If you do perform it, the maneuver stays inside 94010 rather than being billed on its own.

Clinical indications: When to bill spirometry

CPT Code 94010 requires medical necessity. Payers expect a supported diagnosis before they approve payment, and Medicare sets its own rules through Local Coverage Determinations (LCDs).

The most commonly covered diagnoses are ICD-10-CM codes J44.x (COPD), J45.x (asthma), and J96.x (respiratory failure). Coverage still varies by Medicare Administrative Contractor (MAC) jurisdiction, so check your regional MAC LCD before you bill.

• COPD diagnosis or monitoring: ICD-10-CM J44.x codes are among the highest-volume indications for spirometry in primary care and pulmonology.
• Asthma diagnosis or severity assessment: J45.x codes, where spirometry confirms airflow obstruction in guideline-based asthma care.
• Pre-operative pulmonary assessment: Surgeons ordering baseline spirometry before thoracic or high-risk procedures.
• Occupational exposure evaluation: Workers with dust, chemical, or fume exposure needing periodic lung function monitoring.
• Smoking history evaluation: Patients with a 10-pack-year history or more, where early COPD screening is clinically appropriate.
• Interstitial lung disease monitoring: Tracking progression in conditions such as pulmonary fibrosis (J84.x).
• Unexplained dyspnea workup: Where the initial evaluation finds no cardiac cause, spirometry establishes or rules out an obstructive or restrictive pattern.

Pulmonologists, primary care physicians, internists, and occupational medicine providers all bill CPT 94010 regularly. Respiratory therapists may perform the technical component, but the interpreting physician has to be separately identifiable for split billing to apply.

Documentation requirements for 94010

Incomplete documentation is the most common reason CPT 94010 claims are denied on audit. The American Thoracic Society (ATS) publishes standardized spirometry performance criteria, and CMS MAC LCDs align closely with those standards. Your record needs all of the following before a claim goes out.

• Physician order: A signed order from the treating or ordering physician, with the clinical indication stated.
• Graphic spirometry tracing: The printed flow-volume loop or volume-time curve has to stay in the medical record.
• Pre- and post-bronchodilator results: Required where bronchodilator response is clinically relevant. If you test pre-bronchodilator only, document why post-testing was not indicated.
• Technician qualifications: Some LCDs require the performing technician to meet competency standards aligned with ATS criteria.
• Physician-signed interpretation with clinical correlation: This is the element audits catch most often. The interpretation has to go past the raw numbers. It states whether the pattern is obstructive, restrictive, mixed, or normal, and ties that finding to the patient’s clinical picture.
• Supported ICD-10-CM diagnosis: The diagnosis code on the claim appears on your MAC’s covered list, or meets the “clinically appropriate” standard.

A structured encounter template does that enforcement for you. If the interpretation field is not required before the note closes, a missing interpretation goes unnoticed until the claim comes back denied. Capturing the tracing reference, the interpretation sign-off, and the ICD-10-CM code in one encounter record cuts audit risk considerably.

Who can bill spirometry and where

Eligible providers include physicians (MD or DO), nurse practitioners, and physician assistants who perform and interpret spirometry within their scope of practice. Respiratory therapists may perform the technical component but cannot independently bill the professional interpretation.

2026 Medicare reimbursement for CPT Code 94010

Medicare pays for CPT Code 94010 under the Medicare Physician Fee Schedule (MPFS). The national rates below are approximate. Your payment depends on the Geographic Practice Cost Index (GPCI) adjustment for your locality.

Pull your own figure from the CMS Physician Fee Schedule lookup tool. Commercial payer rates usually differ from Medicare and need checking against each payer’s fee schedule.

Those are approximate national figures, subject to GPCI adjustment. Verify the current values with the FastRVU 2026 RVU lookup tool for a locality-adjusted amount. Note that the work RVU of 0.17 does not move with the site of service. What changes is the practice expense component, which is why the office rate is the higher of the two.

Which modifier applies to CPT 94010

The modifier you append to CPT 94010 depends on who owns the equipment and who performs the interpretation. Two questions settle it, and the chart below runs through both.

Never append TC or 26 in a private office that owns the spirometer and whose billing physician interprets the results. Splitting a global service into components when one entity performs both is a billing error. Payers can read it as overcoding during an audit.

CPT 94010 vs CPT 94060: Key differences

Coders confuse CPT 94010 and CPT 94060 often, but the two describe different clinical services. CPT 94060 adds a bronchodilator administration step plus a repeat spirometry maneuver to assess responsiveness. That extra clinical work is what justifies its higher reimbursement rate.

Use 94010 when the clinical goal is a baseline lung function measurement. Use 94060 when you need to know whether the patient responds to a bronchodilator, typically to confirm asthma or to test COPD reversibility. Do not bill 94010 as a pre-step and add 94060 as a post-step without checking current NCCI edit status.

Bundling rules and NCCI edits

The National Correct Coding Initiative (NCCI), maintained by CMS, defines which code pairs may be billed together. For CPT 94010, the bundling concern that comes up most involves 94060. CMS updates NCCI edits quarterly, so work from the current quarterly file rather than prior-year information.

When 94010 and 94060 appear on one claim for the same date of service, the edit pair may trigger. The modifier indicator on the current NCCI table decides whether the edit can be bypassed with modifier 59, or with XS, XU, XP or XE. Indicator 1 means a modifier can bypass the edit, provided each service has a documented clinical reason. Indicator 0 means the codes are mutually exclusive and cannot be billed together at all.

Before billing both 94010 and 94060 on the same date, work through four steps.

1. Pull the current NCCI edit file from CMS.
2. Confirm the modifier indicator for the 94010 and 94060 pair.
3. Document the distinct clinical reason for each maneuver.
4. Append the appropriate modifier to the claim.

Claim-validation rules can flag this code pair automatically before submission. That catches the error while the encounter is still open, rather than weeks later when the payer rejects it.

Related pulmonary function test codes

CPT 94010 is the foundation of pulmonary function testing, but a full workup usually involves more codes. The table below lists the codes most commonly ordered alongside 94010, or instead of it.

Why 94010 claims get denied

The same handful of errors drives most CPT 94010 denials. Knowing the pattern lets a billing team build prevention into the encounter instead of chasing claims one at a time. The common denial codes for procedure-based claims map directly onto the list below.

• Missing physician interpretation: Submitting the tracing without a physician-signed interpretation note is the most common audit finding. A technician’s report does not satisfy it.
• Incorrect modifier for place of service: Global billing from a hospital outpatient setting is one version. Modifier TC from a private office that does not own the equipment is another.
• Unbundling 94010 and 94060: Billing both codes on one date without checking NCCI edit status, or without a documented clinical purpose for each.
• Unsupported diagnosis: Using a non-covered ICD-10-CM code, or leaving out a covered diagnosis from the MAC’s LCD list.
• Thin medical necessity documentation: The clinical note does not justify why spirometry was ordered on this date for this patient.
• Same-day E&M without modifier 25: Where 94010 and an evaluation and management service share a date, the E&M needs modifier 25. It shows the visit was significant and separately identifiable, beyond the pre- and post-service work for the procedure.

Catching these at the point of care beats catching them after submission. The clean claim requirements payers check are worth building straight into the spirometry encounter template.

How Pabau keeps spirometry claims clean

Coding rules only work when they sit inside the daily workflow. A billing team that has to remember to check each element will miss one on a busy afternoon, and the denial arrives three weeks later.

Practice management software like Pabau moves the check into the template instead. Pabau’s claims management software connects procedure ordering to code selection and documentation capture in one workflow. For spirometry billing, that means three things.

• The encounter template can require a physician interpretation before the note is marked complete.
• CPT 94010 can be pre-linked to its common ICD-10-CM diagnosis codes, which cuts manual entry errors.
• Claim tracking shows which 94010 claims were denied and why, so recurring patterns surface instead of hiding inside one-off write-offs.

Eligibility runs before the patient arrives and claims are scrubbed before they leave, so a missing interpretation surfaces while the chart is still open. Billing staff spend their time on the claims that need a human, not on re-reading the ones that were already correct.

Claim.MD, Pabau’s US clearinghouse partner, routes CPT and ICD-10 claims to thousands of payers. Claims sent through that integration carry real-time eligibility verification and electronic remittance advice, so payments reconcile against the expected fee schedule amount automatically.

Stop chasing CPT 94010 denials by hand

Pabau’s claims management workflow flags incomplete spirometry documentation before submission and tracks claim outcomes by code. See how it works for pulmonology and primary care billing teams.

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Conclusion

Three causes account for most CPT Code 94010 denials. They are an unsigned interpretation, a modifier that does not match the setting, and an NCCI conflict with 94060. The code itself is simple, and the workflow around it is where practices lose money.

So the fix belongs in the encounter template rather than in a reminder to the billing team. Require the interpretation before the note closes, and pre-link the diagnosis codes. Then check the current NCCI file before you bill 94010 and 94060 on one date. Get those three right and spirometry stops being a code your team argues with payers about.

Book a demo to see how Pabau builds those checks into a pulmonology or primary care encounter, so 94010 claims leave the building complete.

Continue your research

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