For pulmonary medicine, sleep, interventional and rehab programs, lapsed authorizations, stale plans of care and undelivered session banks put more than $270,000 a year at risk in a four-physician group before a single claim is coded.
Get a free revenue cycle assessmentPulmonology revenue cycle management covers every step that turns a pulmonary encounter into cash: eligibility, prior authorization, utilization review, charge capture, coding, claims, denials, appeals and AR follow-up. Medical billing starts at the claim; revenue cycle management starts before the patient is scheduled, which is where most pulmonology revenue is actually lost.
Most specialties decide their revenue at the claim. Pulmonology decides it weeks earlier, because so much of the work is authorized, scheduled and repeated rather than performed once and billed.
Three things drive that. The high-dollar services are gated: severe asthma biologics, advanced chest imaging, polysomnography and interventional bronchoscopy sit behind a payer approval with an expiry date, and that approval attaches to a patient rather than to a claim. A large share of the revenue then arrives as a series: a rehabilitation course is a bank of authorized sessions, a biologic is a dosing calendar, a COPD panel is a monthly care management obligation. Money leaves when the series stops early or its paperwork goes stale, and no denial is generated to warn anyone. Finally, the diagnostic lab and the hospital work bill by different mechanics, so one group runs an office fee schedule, a technical component stream and a facility-based professional stream at once, each aging at a different speed.
Payer behaviour matches. Administrative reasons drove 25% of in-network marketplace denials in 2024 against 5% for medical necessity, so the dominant failure is process, not clinical judgement. A practice can employ good coders and still lose six figures a year. The coding is correct. The authorization expired in week nine, the plan of care was never re-signed, and eleven approved sessions were never delivered. The code-level rules sit on our pulmonology billing services page.
Recognise three or more of these in your own numbers and the problem is the process, not the payer.
Get a free assessmentPulmonology practices are usually described by setting. For revenue cycle work the useful axis is revenue mix, because the mix decides which leak dominates and how the AR ages.
Google asks what the seven steps of the revenue cycle are. Here they are, each with the failure mode that shows up in pulmonology specifically.
Failure mode: a series starts against benefits checked once at intake, so a mid-course plan change surfaces at the first denial.
Failure mode: the authorization covers the study ordered rather than the study performed.
Failure mode: deductible-heavy plans leave large balances on diagnostic testing that nobody collects.
Failure mode: hospital and ASC encounters never reach the office charge report, and care management time is delivered with no time log or consent on file.
Failure mode: charge lag on interpretation-dependent services pushes claims toward the one calendar year filing limit in 42 CFR 424.44.
Failure mode: a short payment on a high-volume diagnostic code posts as paid and repeats thousands of times a year.
Failure mode: authorization denials are reworked one at a time instead of fixing the calendar behind them.
Nobody covering this topic has tabulated where pulmonary money actually leaves. This table is organised by cause, not by code, and every row carries a Luxen audit finding. Dollars are modelled on a four-physician pulmonary and sleep group collecting $2.4M a year, with the arithmetic in each cell; allowed amounts are that group's own averages, not Medicare national rates. The code families involved are 94010 to 94799, 31622 to 31661 and 95800 to 95811.
| Leak point | Codes or rule | What goes wrong | Annual dollars at risk | Luxen audit finding |
|---|---|---|---|---|
| Authorization lapses inside a biologic series | Payer medical policy; CMS-0057-F | The next dose is given after the approval expired, and purchased drug becomes unbillable | $61,000 (34 patients, 1.4 lapsed doses each, $1,280 allowed) | Authorization had lapsed before the next scheduled dose for 22% of patients on a biologic |
| Imaging performed before approval is on file | 71250, 71260 | The study proceeds on a verbal, the authorization never posts, an administrative denial follows | $12,000 (210 studies, 23 unauthorized, $520 allowed) | Advanced chest imaging was performed before the authorization was on file on 11% of cases |
| The rehabilitation plan of care goes stale | 42 CFR 410.47, 30 day re-signature | Sessions continue against an unsigned plan and the block is recouped on review | $11,000 (8 of 60 episodes, 14 sessions each, $96 allowed) | Plans of care ran past the 30 day re-signature on 13% of Medicare episodes |
| Authorized sessions expire undelivered | 42 CFR 410.47, 36 session benefit | The patient drops out mid-course and approved revenue expires with no denial to flag it | $52,000 (60 courses, 9 undelivered sessions each, $96 allowed) | Completed 36 session courses delivered a median of 9 fewer sessions than authorized |
| Patient balances written off after one statement | 95810, E0601, 99490 service lines | Deductible-heavy balances are adjusted rather than followed | $74,400 (3.1% of $2.4M collected) | Practices lost 3.1% of collections to balances written off before a second statement |
| Contracted rates are never checked against payments | Payer fee schedule load | A short payment posts as paid and repeats on every claim with that code | $62,200 (1,638 of 21,000 paid claims, $38 short) | Underpayments appeared on 7.8% of paid claims, short by an average $38 |
Total exposure is roughly $272,000, or 11% of collections, and most practices carry three or four of these causes rather than all six. Our denial and AR recovery team works the largest cause first, and our patient billing team takes the statement side before it is written off.
We will tell you which of these leaks is open in your practice, free, in 30 minutes.
Book the reviewEvery competing page names metrics and quantifies none. On sourcing: three Typical values come from named federal sources, and three metrics have no federal benchmark, so those cells carry what Luxen observed across 410 billing reviews and say so. Every Target is Luxen client data.
| Metric | Definition | Typical | Target |
|---|---|---|---|
| Days in AR | AR divided by average daily charges | 44 days for pulmonology (Luxen billing reviews, 410 practices). No federal benchmark is published. | 33 days or fewer within 120 days |
| Net collection rate | Payments divided by allowed amount | 91% to 93% at review (Luxen billing reviews). No federal benchmark is published. | 97.8% over six months |
| Clean claim rate | Claims paid on first submission with no rework | 88% to 91% at review (Luxen billing reviews). No federal benchmark is published. | 97.3% within 90 days |
| First-pass denial rate | Share of claims denied on first adjudication | 19% of in-network claims denied across HealthCare.gov issuers in 2024, range 3% to 36% (CMS Transparency in Coverage 2026 PUF) | Under 6% within 90 days |
| Cost to collect | Total billing cost divided by collections | Medicare fee-for-service improper payment rate 6.55% on claims from July 2023 to June 2024 (CERT, FY2025), the avoidable rework floor | 3% to 6% of collections, all-in |
| Prior authorization turnaround | Request to payer decision, biologics and imaging | 7 calendar days standard, 72 hours expedited, the payer maximum from 1 January 2026 (CMS-0057-F) | On file before the scheduled date for 98% of doses and studies |
Typical values come from the named federal source in the table intro. Target values come from Luxen client data.
A billing service starts at the claim. Revenue cycle work starts here, because the approval, not the coding, decides whether the claim was ever payable, and because an approval that expires quietly produces no denial for anyone to work.
Under the CMS Interoperability and Prior Authorization final rule, Medicare Advantage organizations, state Medicaid and CHIP fee-for-service programs, and Medicaid and CHIP managed care plans must decide a standard request within 7 calendar days and an expedited request within 72 hours, with a compliance date of 1 January 2026. Two provisions matter more than the clocks. Payers must give a specific reason for every denied authorization, which makes root cause analysis possible for the first time. And they must post authorization metrics publicly each year, with the first set due by 31 March 2026, which means a practice can now compare its own turnaround against the payer's published one before signing a contract.
The unit of work in pulmonology is not the request, it is the expiry. A usable calendar records the approved service, site of care, unit count, start and end dates and renewal lead time for every patient on a biologic, in a rehabilitation course, or scheduled for advanced imaging or a sleep study, and it is reviewed weekly rather than when a denial arrives. Our eligibility and prior authorization team runs that calendar against the schedule so a renewal is filed before the dose, not after it.
Inpatient pulmonary and critical care work carries a second layer. The payer reviews continued stay while the patient is still in the bed, and a level of care downgraded concurrently is far cheaper to defend than one reversed on retrospective audit. The same logic applies to a rehabilitation course: an extension filed in week eight preserves the block, one filed in week eleven argues about it. Where a peer to peer is offered, schedule it inside the payer window rather than declining by default, because it costs less than an appeal and lands months earlier. Most of this work is calendar discipline rather than clinical argument.
The signature revenue mechanic in pulmonology is the series. Manage the series and the claims follow. Manage only the claims and the series quietly runs down.
Under 42 CFR 410.47, Medicare covers pulmonary rehabilitation for beneficiaries with moderate to very severe COPD, defined as GOLD classification II, III and IV, on referral from the physician treating the chronic respiratory disease, and for those with confirmed or suspected COVID-19 and persistent respiratory symptoms lasting at least four weeks. The benefit is 36 sessions across 36 weeks or fewer, with a further 36 only when the Medicare Administrative Contractor approves. No more than two one-hour sessions may be furnished in a day. A physician or nonphysician practitioner must be immediately available throughout, and the individualized treatment plan must be established, reviewed and signed by a physician every 30 days.
Read that as a balance sheet. An approved course is authorized revenue with an expiry date and a monthly signature requirement, so attrition at session twenty is a write-off that never generates a denial. Practices that hold their session banks report delivered against authorized every month.
A COPD and asthma panel qualifies for chronic care management under CPT 99490, covering the first 20 minutes of clinical staff time in a calendar month for a patient with two or more chronic conditions expected to last at least 12 months or until death, with add-on 99439 for each further 20 minutes. Where the practitioner performs the time personally, 99491 covers the first 30 minutes and 99437 each further 30; complex care sits at 99487 and 99489. Consent must be obtained before billing. Most practices already do this work inside nurse triage and medication reconciliation but never log the time, so the annuity never appears. Our certified medical coding team reconciles the time log and consent to the charge before the month closes.
A severe asthma biologic is a dosing calendar, not a procedure. Whether the practice buys and bills the drug or a specialty pharmacy ships it changes who carries the loss when an approval lapses, and a payer redirecting the site of care mid-series resets the authorization.
Two leaks sit outside the claim entirely. Both are invisible on a standard aging report.
Underpayments against contracted rates appeared on 7.8% of paid claims in our claim audit, and the average underpaid claim was short by $38. On a high-volume diagnostic code billed several thousand times a year, that is a salary. The fix is mechanical: load every contracted rate into the practice management system, post remittances against the contracted rate rather than the charge, and route variances into a monthly recovery queue with a filing deadline attached. Contracts are then renegotiated with the variance report in hand rather than on a percentage of Medicare argued from memory.
A pulmonologist who is not yet enrolled generates charges that cannot be billed, and Medicare allows one calendar year from the date of service to file under 42 CFR 424.44. Held charges burn that window quietly. Enrollment starts before the start date, re-credentialing is tracked on a calendar, and hospital privileging is reconciled against payer rosters, because a physician may be privileged at the hospital and still absent from the payer file. Our provider credentialing team works the roster rather than the application.
Managed care rules differ enough by state to change the authorization calendar itself. Practices we support with Ohio medical billing and Texas medical billing run different renewal lead times for the same biologic because the plans behind them do. In our Practice Manager Survey 2026, 34% of practice managers had replaced a biller in the past two years, which is how that institutional knowledge leaves a practice. Separately, 38% had changed EHR or practice management system in the past five years, and of those, 71% said collections dipped for at least six months afterwards.
We audited 5,800 pulmonology claims drawn from the Luxen claim audit of 61,400 claims, together with the pulmonology subset of 410 practice billing reviews, covering January 2025 to June 2026. Unlike a coding audit, this one counted only what happened before the claim existed: whether coverage was verified, whether an authorization was valid on the date of service, whether a plan of care was current, and whether authorized services were delivered.
The second and fourth findings appear nowhere else on this topic. Undelivered authorized sessions generate no denial, no rejection and no aging entry, which is why nobody has counted them.
An in-office testing lab, a rehabilitation program and a growing biologic panel on $2.4M a year. It started with 51 days in AR, a 13.8% first-pass denial rate and $214,000 in AR older than 120 days, and its largest denial category was administrative.
We signed the BAA, took the authorization calendar first and the aged AR second. Six months later it carried 31 days in AR and a 5.4% first-pass denial rate, and $148,900 had been recovered. The rehabilitation program delivered 94% of authorized sessions in the final quarter, against 71% in the first.
Practice Administrator, four-physician pulmonary and sleep group. Luxen client data, January 2024 to June 2026.
Same four-physician group: $2.4M collected, 21,000 paid claims, 44 days in AR. Substitute your own numbers.
Net collection rate at onboarding across 38 Luxen client practices was 91.4%. Collecting $2,400,000 at that rate implies an allowed amount of $2,400,000 divided by 0.914, or $2,625,800.
Those practices reached 97.8% over six months. The same allowed amount then collects $2,568,000, a recurring gain of $168,000 a year.
Part of the $168,000, not additions. Underpayments on 7.8% of 21,000 paid claims is 1,638 claims short by an average $38, or $62,200. Balances written off before a second statement run at 3.1% of collections, $74,400, of which statements plus text reminders recovered 22% across 14 practices, or $16,400.
Daily charges are $2,400,000 divided by 365, or $6,575. Moving from 44 days in AR to 33 releases 11 days, or $72,300, once.
In-house runs $241,400 fully loaded. Luxen at 4.5% of the higher collections is $115,600, saving $125,800. Year one returns $168,000 recurring, $72,300 once and $125,800 in avoided cost.
Want this arithmetic run on your own collections and denial rate?
Run my numbersLuxen charges 3% to 6% of collections. One page on this topic publishes a number and the rest say request a quote, so here is what moves it.
Eligibility, prior authorization, certified coding, submission, posting, denial management, appeals, underpayment review, patient statements and monthly reporting. No setup fee, no exit fee, month to month with 30 days notice. See what full-service medical billing covers.
Nobody covering this topic has put the two costs side by side. Same four-physician group, $2.4M a year, in-house fully loaded.
| Line item | In-house | Luxen |
|---|---|---|
| Billing staff, 2.0 FTE | $148,000 salary, payroll taxes and benefits | Included |
| Certified coding | $42,000 for 0.5 FTE or per-claim coding | Included |
| Practice management, clearinghouse and claim fees | $14,400 a year | Included |
| Denial rework | $21,000 (11 staff hours a week at loaded cost) | Included |
| Turnover and vacancy cover | $16,000 a year averaged | None |
| Annual total | $241,400, or 10.1% of collections | $72,000 to $144,000 at 3% to 6% |
Keep it in-house when one experienced biller already holds a clean claim rate above 95% and AR under 35 days, or when the practice carries two billers so a resignation is not an outage. Outsource when denial follow-up has no full-time owner, when the authorization calendar lives in someone's head, or when one departure would stop cash. In our Practice Manager Survey 2026, 42% said nobody owns denial follow-up full time and 63% could not name their top three denial reasons. Compare options at medical billing companies.
People search for the top five RCM companies in the United States and get a list somebody was paid to write. No list is right for every practice, because the right partner depends on a revenue mix that differs from one practice to the next. Score candidates instead.
Score every candidate out of 100 on the same questions.
You already have an incumbent, so the question is how long the gap lasts. It does not have to be a gap.
We sign a BAA before touching data, then run in parallel rather than cutting over. Working claims begin about two weeks after the BAA is signed, and first recovered payments arrive a median of 17 days after work begins. The oldest money is worked first because it expires first: we recovered 61% of the dollar value of claims aged 90 to 180 days that practices had stopped working, and 23% past 180 days. Nothing migrates, so your incumbent can finish in-flight claims while we take new submissions and the backlog. The contract is month to month, 30 days notice, and neither a setup nor an exit fee.
Work inside the system you already run. Of the practice managers we surveyed in 2026, 38% had changed EHR or practice management system in the past five years, and 71% of those said collections dipped for at least six months afterwards, so a migration is a revenue event before it is an IT one. The sequence that pays back fastest is: real-time eligibility at scheduling; an authorization calendar keyed to expiry rather than request date; claim edits for the families you actually bill; denial routing by root cause rather than payer; and last, underpayment detection against loaded rates. Automating denials before fixing the front end only sorts them faster. Our medical virtual assistants cover the portal and phone work no integration removes.
Scheduling and eligibility, prior authorization and medical necessity, registration and financial clearance, charge capture and coding, claim scrubbing and submission, payment posting and underpayment review, then denial root cause analysis and AR follow-up. In pulmonology the first two carry the most money, because biologics, advanced imaging and sleep studies are gated by an approval with an expiry date. Claims must still be filed within one calendar year of the date of service under 42 CFR 424.44.
There is no honest ranking, because the right partner depends on your revenue mix. Score candidates on seven weighted criteria instead: specialty depth, front-end ownership, denial reporting, underpayment detection, whether they work in your system, commercial terms and security. In our Practice Manager Survey 2026, 52% of practices that switched vendors named missing denial reporting as the main reason, so weight that heavily.
Because more of the revenue is gated before the service. Across HealthCare.gov issuers in 2024, administrative reasons drove 25% of in-network denials and a missing prior authorization or referral drove 9%, against 5% for medical necessity. Pulmonology carries an unusually high share of authorization-gated services, so it inherits the administrative denials that follow.
Our fee is 3% to 6% of collections. On $2.4M a year that is $72,000 to $144,000. Running the same work in-house models at $241,400, or 10.1% of collections, once salary, benefits, coding, software, denial rework and turnover cover are all counted.
Working claims begin about two weeks after the BAA is signed, and first recovered payments arrive a median of 17 days after work begins. Clean claim rate and denial rate move inside 90 days; net collection rate takes about six months. Aged AR is worked first because it expires first.
Medical billing starts once a service has been performed and turns it into a paid claim. Revenue cycle management starts before the patient is scheduled and owns eligibility, prior authorization, utilization review and the authorization calendar as well. The distinction is financial: an undelivered block of 36 authorized rehabilitation sessions never produces a claim, so billing never sees it and revenue cycle management does.
A free 30 minute review of your AR ageing and denial reasons. We tell you what is recoverable and what it would take. No deck, no commitment, no fee.
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