Split-night studies bill as one code, not two, and Medicare's 90-day PAP adherence rule — 4 or more hours a night on 70% of nights — decides whether CPAP coverage continues past the trial period. Miss either rule and the appeal takes three times longer than getting it right the first time.
Common Billing Challenges
These are the six billing failure points we see most often in sleep medicine practices — and the ones our team resolves systematically from day one.
A split-night study is one encounter, one code — 95811 for the entire night. Billing 95810 plus 95811 for the same visit is a documented denial pattern payers audit closely.
CMS requires at least 2 hours of diagnostic recording and an AHI of 40+ (or 20+ with complicating factors) before switching to titration mid-night — the exact times and AHI need to be in the chart.
Home sleep testing isn't appropriate for patients with CHF, COPD, neuromuscular disease, or suspected central sleep apnea — payers deny HST claims for these patients and expect full attended PSG instead.
CPAP masks, tubing, and filters bill through a DME supplier under HCPCS, not through the physician practice — billing supplies through professional billing without DME accreditation triggers immediate denial.
Medicare only continues CPAP coverage after the patient shows 4+ hours of use on 70% of nights in a 30-day window during the first 90 days — without download data in the chart at follow-up, there's no proof.
Auth requests submitted with just the CPT code — no Epworth Sleepiness Scale or STOP-BANG score attached — get denied for lack of medical necessity and have to be resubmitted.
Key Procedure Codes
Our coders hold specialty-specific credentials and train continuously on the codes that drive the most revenue — and the most denials — in sleep medicine.
| CPT Code | Description | Common Issue |
|---|---|---|
| 95810 | PSG, attended, age 6+, sleep staging + 4 parameters | In-lab study; requires a technologist present |
| 95811 | PSG with CPAP titration, attended | Bills the entire split-night study — never combined with 95810 |
| 95800/95801/95806 | Home sleep apnea test (HST), unattended | Inappropriate for CHF, COPD, neuromuscular disease, or suspected central sleep apnea |
| 94660 | CPAP initiation and management | Professional service billed by the physician; DME supplier bills the device separately (E0601) |
| 99091 | Remote physiologic data review, 30+ min/month | Used for ongoing PAP adherence monitoring |
| Modifier 26 | Professional interpretation only | Used when the practice doesn't own the sleep lab or HST device |
Why Rcmaxis
We're not a generalist billing service that added a specialty module. Our team is built around specialty-specific expertise.
Every coder on your account holds the specialty coding credential relevant to sleep medicine — not a generic CPC only.
Significantly above the denial patterns sleep medicine practices see from split-night miscoding and missing 90-day adherence documentation. Fewer rejections means faster payment and less write-off risk.
Full EHR integration, payer enrollment verification, and charge capture setup in 2 weeks — with zero disruption to your surgical schedule.
One point of contact who knows your practice, your payers, and your billing history — available for weekly calls and monthly performance reviews.
Month-to-month engagement. We earn your business every month by improving your collections — not by locking you in.
Live visibility into your collections, denial rate, aging AR, and payer performance — updated daily, reviewed monthly with your account team.
Straight answers to what practices usually ask before they switch.
Free revenue assessment for qualified practices. We audit your last 90 days of claims, identify every revenue leak, and show you a clear path to better collections — at no cost.