Charge Lag in Medical Billing: The Claims Waiting on Unsigned Notes

Why charge lag in medical billing runs against a fixed clock

For Medicare, the deadline is set in regulation. Under 42 CFR 424.44(a)(1), a claim for services furnished on or after January 1, 2010 “must be filed no later than the close of the period ending 1 calendar year after the date of service,” with narrow exceptions such as an error by Medicare or its contractor. The Medicare Claims Processing Manual, chapter 1, section 70.1, says the start date is the date of service, and for professional claims with a span of dates, the line-item “From” date.

The clock starts at the visit, not at the signature. Every day a note stays open is a day off the same year, and the date of signature does not move the deadline. A denial for late filing is not an initial determination that can be appealed: 42 CFR 405.926(n) lists determinations that a provider or supplier failed to submit a claim timely among the actions that are not initial determinations. Noridian, a Medicare Administrative Contractor, puts it plainly on its timely-filing page: “A claim denied due to timely filing does not have appeal rights.”

Rejections share the clock. Noridian’s page also says a rejected claim “does not enter the claims processing system due to missing or invalid data” and must be resubmitted with corrected information within the one-year timeframe. A claim that leaves late and then bounces has spent its margin twice.

Commercial payers and Medicaid programs set their own filing limits in contracts and state rules, and those windows can be shorter than Medicare’s. The only reliable number is the one in each payer contract, which is why the report below lists the shortest filing window among the practice’s payers next to the oldest open note.

Where the days go between the visit and the claim

The stalls are ordinary, and each one leaves a record somewhere in the PM/EHR or the billing queue. A biller on a public coding forum described one version in 2022: a provider who “doesn’t close and sign off on her documentation for about 3-4 weeks at a time.” That is one practice’s account, not a measure of anyone else’s, but it shows how a single provider’s habit becomes the practice’s cash timing.

• Notes left open at the end of a clinic day and signed in a weekly batch.
• Encounters closed without the charge — a procedure performed in the room that never reaches a charge line, so nothing is late because nothing exists.
• Charges held in a review queue for a coding question nobody has time to answer.
• Registration gaps — a missing subscriber ID or referring provider — that hold the claim until someone calls the patient back.
• Claims batched and sent on a fixed weekly day instead of daily.
• Clearinghouse rejections worked when someone gets to them, mixed in with denials.

What the CMS manuals say about signatures — and what they leave to the practice

The Medicare Program Integrity Manual, chapter 3, section 3.3.2.4 (Rev. 13008, effective January 17, 2025), sets out signature requirements for medical review. It says Medicare requires that the person responsible for the care be identifiable, and that signatures are required on review for two purposes: to satisfy a specific signature requirement in statute, regulation or a coverage determination, and to resolve concerns about authenticity. Where a required signature is missing and no rule says it had to exist before a given event or date, the review contractor may use an attestation process; an attestation must be signed and dated by the author of the entry and cannot be used to “backdate” a document that policy requires to be signed first.

Section 3.3.2.5 adds that services are “expected to be documented in the medical record at the time they are rendered,” and that the date and author of any amendment, correction or delayed entry should be identifiable. The same section 3.3.2.4 notes that when a scribe documents an entry, the treating practitioner’s signature affirms the note, and that this practitioner concurrence is also required when AI technology is used to capture the transcription.

Two things follow, and neither is legal advice. First, attestation is a review remedy, not a billing workflow: it exists for a reviewer asking about a record, not as a reason to leave notes unsigned. Second, the manual section sets no number of hours or days for signing. Signing deadlines come from each practice’s or hospital’s own policy, and whether a claim may drop before the note is signed is the compliance officer’s decision. The measurement below works the same either way.

How to measure charge lag by provider, every week

The report needs nothing new: the open-encounters or unsigned-notes report, the charge-review queue, the claim submission dates and the fee schedule already exist in the PM/EHR and the clearinghouse. What turns them into a working number is the shape of the report and one name on it.

• By provider: notes open today, the age of the oldest one, and the median days from date of service to signature over the last four weeks.
• In dollars: the open notes priced at the practice’s expected allowed amount for each visit type, so the list is ranked by money, not by count.
• Clock two: the median days from signature to claim, and the number of charges sitting in review or on hold today, with the hold reason.
• The deadline line: the oldest open date of service next to the shortest filing window among the practice’s payers.
• Rejections: claims rejected and not yet resubmitted, by age, kept apart from denials.
• One owner: a named person who sends each provider their own list on the same morning every week and reports one practice total.

Illustrative example: a four-provider practice sees about 400 visits a week with an average expected allowed amount of $120. If the median visit waits nine days from service to claim instead of three, about six extra days of visits — some 340 visits, roughly $41,000 at those round numbers — sit earned and unbilled at any moment. That is not lost money; it is cash the practice has earned and not yet asked for. What turns delay into loss is the claim that crosses a filing window or the charge that never reaches a claim at all. Because these reports count and total by provider with no patient names, the measurement itself needs no patient data to leave the practice.

Fixing charge lag without buying anything first

The changes that shorten charge lag are mostly decisions about ownership and time, and the first ones cost nothing. Each provider sees their own open notes, ranked by dollars, at a fixed time. Claims drop daily rather than on a batch day. The rejection queue becomes its own list with its own age report. Charge-review holds carry a reason and an owner, so a coding question has someone to answer it by a date.

Tools come after the habits, not before them. An AI scribe can help close notes faster, and CMS still expects the treating practitioner to sign and stand behind the note. It does nothing for a charge held in review, a registration gap or a rejection nobody works. Buying one before measuring the two clocks risks speeding up a clock that was not the long one.

When charge lag is not the problem — and when not to hire anyone

If both clocks are short and stable and no claim gets near a filing window, charge lag is not where the money is. Look instead at denials by reason code, at payments below the contracted rate, and at prior authorizations that expire before the visit. If the lag is one provider and everyone already knows it, the fix is a conversation and a weekly list, not a study. And if the question is whether a note supports the code billed, that belongs with certified coders and the compliance officer, not an operations review.

Our Revenue Review reads charge lag by provider alongside rejections still open, denials by reason code and payer, and timely-filing write-offs by month, all from aggregate reports the practice exports itself, with no patient names. It takes two weeks and ends in a written report the practice keeps, with a monthly dollar figure wherever the records support one. It makes no clinical or coding judgment and certifies nothing.

The next step is a free 20-minute call. Run the unsigned-notes report by provider first; it answers more of the question than the call will.