Home Health Billing Under PDGM: Where 30-Day Periods Quietly Cost You Revenue

PDGM pays home health agencies by the 30-day period, and every period gets scored independently on admission source, functional impairment, and comorbidities. Agencies lose revenue not through denials, but through underscored periods, missed comorbidity codes, and LUPA thresholds crossed without anyone noticing until the remittance shows a fraction of the expected payment. Home health billing under PDGM doesn’t fail the way other specialties fail. There’s usually no denial to chase. The claim pays, just at a lower rate than it should have, because a functional impairment score wasn’t fully supported, a comorbidity code never made it onto the claim, or a visit count slipped under the LUPA threshold nobody was tracking. In our experience working with home health agencies since PDGM’s rollout, this quiet underpayment adds up to more lost revenue over a year than outright denials do. It doesn’t show up on a denial report because technically, nothing was denied. It shows up as a lower average payment per period than the agency’s actual clinical mix should generate. This guide breaks down exactly where 30-day periods lose revenue and what to check before, not after, each period closes. Home health agencies lose PDGM revenue mainly through underscored OASIS functional assessments, missed comorbidity codes, and unmonitored LUPA thresholds, not through claim denials. Each 30-day period is scored independently, so an accuracy gap in one period doesn’t carry forward or get caught automatically in the next. PDGM Basics: How a 30-Day Period Gets Its Payment Rate Every 30-day period’s payment depends on four factors: admission source (community or institutional), clinical grouping based on the principal diagnosis, functional impairment level from the OASIS assessment, and comorbidity adjustment from qualifying secondary diagnoses. Get any one of these wrong, and the period’s case-mix weight, and therefore its payment, comes in lower than the patient’s actual clinical picture supports. Unlike the old 60-day episode model, PDGM treats each 30-day period as its own scoring event. A patient’s second period doesn’t inherit the first period’s admission source designation or functional score. Every period needs its own accurate documentation, which means the revenue risk repeats every 30 days for the length of the care plan, not just once at intake. Where PDGM Revenue Actually Leaks The LUPA Threshold: Where Visit Counts Quietly Cut Payment The LUPA threshold ranges from 2 to 6 visits per 30-day period depending on clinical grouping and functional level. Fall at or below it, and the agency gets paid per visit instead of the full case-mix rate, often a significant revenue cut. LUPA thresholds aren’t a single number across all patients. A period grouped under a higher-acuity clinical category with a higher functional impairment score has a different threshold than a lower-acuity period. Agencies that track visit counts against a single flat number, rather than each period’s specific threshold, either scramble to add an unnecessary visit near period-end or miss the risk entirely and get hit with a LUPA they didn’t see coming. The fix is visibility earlier in the period, not at the end. Flagging a period at visit 3 of a 4-visit threshold with two weeks still remaining gives clinical staff time to confirm whether an additional visit is clinically appropriate, rather than discovering the shortfall after the period has already closed. In-House vs. Outsourced PDGM Revenue Management Filing a Claim Adjustment for an Underscored Period When a retrospective review finds a period was underscored, meaning the clinical documentation supports a higher functional level or an uncaptured comorbidity that never made it onto the original claim, a claim adjustment request can correct it after the fact, within CMS’s timely filing rules. This isn’t the same as an appeal, since there’s no denial being contested. It’s a correction to a paid claim based on documentation that existed at the time but wasn’t reflected in the original submission. The adjustment needs to reference the specific OASIS item or diagnosis that was missed, along with the supporting chart documentation. Agencies that skip this step because the per-period dollar amount looks small individually are leaving real money on the table, since these adjustments are often approved without much friction when the documentation clearly supports the correction. We review each period’s admission source, functional impairment documentation, and comorbidity list against the full clinical chart before the claim goes out, not after the remittance comes back lower than expected. Visit counts get tracked against each period’s specific LUPA threshold with enough lead time for clinical staff to make an informed decision, not a last-minute scramble. How Qualigenix Protects PDGM Revenue Where a claim adjustment request is warranted for a genuinely underscored or undercoded period, we file it, since most agencies don’t have the staff time to pursue every eligible correction on their own. Frequently Asked Questions PDGM is CMS’s home health payment model based on 30-day care periods, using admission source, clinical grouping, functional level, and comorbidity adjustment to set payment. There’s no fixed limit, but every period is scored and billed independently, so documentation accuracy has to hold up period by period throughout care. It ranges from 2 to 6 visits per period depending on clinical grouping and functional level. Falling at or below it triggers per-visit payment instead of the full case-mix rate. Institutional admissions, from a hospital or facility stay within 14 days, generally pay more than community admissions for the same clinical profile. The score sets the payment rate directly. If clinical documentation contradicts a higher score, the claim risks a post-payment review and possible recoupment. Related Resources