Michael Hill, MD and Associates
Claims Dispute Resolution Brief
September 10, 2026
Clinical Validation · Query Compliance · False Claims Act

Timing Is Not the Finding

What makes a post-discharge diagnostic addendum defensible, and what makes it a finding
A retrospective query is not a violation. The theories that survive rebuttal are built on how the query was constructed, on whether the addendum conforms to the recordkeeping principles, and on what the signer believed.

Three years after an ordinary inpatient rotation, the subpoena arrives. In the archived chart of a patient admitted for a urinary tract infection sits an addendum the hospitalist does not remember signing, dated two months after discharge, documenting severe sepsis. Vitals were stable across the four-day stay, lactate normal, creatinine at baseline.

What follows is a composite, not a transcript. Watch what counsel never asks: not why the query came late, not why it used checkboxes. Every question lands on the record, on the indicators, and on what the signer was permitted to say.

On the record · illustrative composite

COUNSEL: Doctor, you discharged this patient, Mr. Davis, on October 14 with a final billing diagnosis of severe sepsis, correct?

WITNESS: Yes, that was the final documented diagnosis on the hospital claim.

COUNSEL: Under the coding guidelines, reporting severe sepsis requires two distinct elements: a documented systemic infection, and acute organ dysfunction, each coded. Correct?

WITNESS: Yes, that is standard.

COUNSEL: Let us examine Exhibit 4, your daily inpatient progress notes from October 11 through October 14. Please show the jury where you documented acute organ dysfunction in Mr. Davis during his four days in the hospital.

WITNESS: Well, he had a significant urinary tract infection, a high fever, and he was fatigued and weak.

COUNSEL: Doctor, fever and fatigue are symptoms of an uncomplicated infection. I asked about organ dysfunction. Did Mr. Davis experience acute respiratory failure?

WITNESS: No. His oxygen saturation remained 98 percent on room air throughout the admission.

COUNSEL: Did he have cardiovascular shock, acute hypotension, or a requirement for vasopressors?

WITNESS: No. His blood pressure remained stable, around 125 over 80.

COUNSEL: Did he experience acute renal failure?

WITNESS: His serum creatinine was 1.0 on admission and 0.9 at discharge. So, no acute renal failure.

COUNSEL: Did his liver fail? Did his platelets drop below 100,000? Was his arterial lactate elevated above 2.0?

WITNESS: No. Those laboratory values were within normal limits.

COUNSEL: In fact, Doctor, during the entire four days you treated Mr. Davis at the bedside, you never once wrote the words sepsis, severe sepsis, or acute organ failure in any of your daily physical examinations or medical decision-making notes, did you?

WITNESS: No, not during the active hospital stay.

Michael Hill, MD & Associates
The Claims Dispute Resolution Company
Page 1 of 4
Timing Is Not the Finding
September 10, 2026
On the record · continued

COUNSEL: Yet on December 12, nearly two full months after Mr. Davis was discharged home, you opened the electronic health record and signed an addendum diagnosing severe sepsis, which upgraded the claim from a simple urinary tract infection to MS-DRG 871. Why did you do that?

WITNESS: I received a clinical clarification query from the hospital's documentation integrity team, asking if his baseline confusion on admission represented acute encephalopathy secondary to sepsis.

COUNSEL: And that query included pre-formulated checkboxes, correct?

WITNESS: Yes, it did.

COUNSEL: Show me where that addendum identifies itself as a delayed entry, and where it preserves what the record said before.

WITNESS: I would have to look.

COUNSEL: Read me the clinical indicators the query put in front of you, and the citation for where each one was found in the record.

WITNESS: It listed a sodium value and said the patient had transient lethargy.

COUNSEL: Lethargy is a characterization, not a value. Did the query cite a source, or offer you any option other than agreeing?

WITNESS: I do not see one.

COUNSEL: And you checked agree, signed the electronic addendum in under thirty seconds, and closed the file, despite your own nursing flowsheets showing that Mr. Davis was alert, fully oriented, and ambulatory throughout the admission?

WITNESS: I was simply responding to the hospital's billing query.

COUNSEL: But when you signed that addendum, you certified to Medicare, under penalty of law, that you personally diagnosed and managed acute organ failure in this patient. That statement was not clinically true, was it, Doctor?

WITNESS: It was based on the query documentation.

Look at which answers actually did damage. The date barely came up. Counsel raised it once and moved on. What hurt the witness was that four days of notes showed no organ dysfunction, that the addendum could not show it was a delayed entry, and that the query handed him a word instead of a number and left him nothing to say but yes.

Payers see it more simply. A note should say what the team was thinking at the bedside, not what a program found weeks later, and codes added late tend to move the DRG when nothing about the care has changed. That is a good reason to pull a chart. It is not a finding on its own. The standard, the manual, and the case law all stop short of letting the date decide anything. Here is each one.

01

What the Standard Actually Prohibits

The governing textThe industry standard is the AHIMA and ACDIS Guidelines for Achieving a Compliant Query Practice (AHIMA, the American Health Information Management Association, and ACDIS, the Association of Clinical Documentation Integrity Specialists), currently the 2022 Update with its October 2023 addendum. Timing is left to organizational policy, with proximity to the encounter named as best practice rather than a rule. The 2026 Update, in draft, applies to all query types alike.

The enumerated markersWhat it does prohibit is testable against the document itself: leading construction, unsourced indicators, interpretation substituted for data, any reference to payment or quality impact, the absence of a genuine alternative, yes/no used to create a diagnosis, repeat querying for a preferred answer, a query sent to a provider who gave no face-to-face care, and mining of prior encounters. Timing and format are not on that list.

Michael Hill, MD & Associates
The Claims Dispute Resolution Company
Page 2 of 4
Timing Is Not the Finding
September 10, 2026
02

What CMS Tells Reviewers to Do With Late Entries

Program Integrity Manual §3.3.2.5No federal regulation makes an electronic addendum a permanent, unchangeable attestation, and the instruction that does exist points the other way. Chapter 3 of the CMS Medicare Program Integrity Manual tells review contractors to count amendments, corrections, and delayed entries that meet three recordkeeping rules, and to disregard those that do not, even when disregarding them produces a denial. The three rules are plain. Label the entry clearly and permanently as an amendment, a correction, or a delayed entry. Show its date and its author. Keep the original text rather than deleting it, with a reliable way to see what changed, when, and by whom.

What the 30-day mark doesAn entry made more than 30 days after the date of service carries less weight on review. A provider who shows a pattern of entries past that window may be referred to the Unified Program Integrity Contractor (UPIC), the contractor CMS uses to investigate suspected fraud. So one late entry raises a question about weight. A habit of them raises a question about referral. The calendar alone answers neither.

MarkerWhat to look for in the recordWhy it holds up
Leading construction Bolding, highlighting, underlining, or arrows directing a response, particularly inside the answer options; a query title naming an undocumented diagnosis. Enumerated in the standard, and visible on the face of the document.
Indicators not sourced Clinical indicators offered with no citation to the note, author, and date they came from, or not specific to this patient and this episode. Testable without a clinical opinion.
Interpretation for data A heart rate of 120 presented as tachycardia; a hemoglobin of 10 g/dL presented as anemia. The record value and the characterization are separable.
No alternative offered No "other, please specify" or equivalent; no "unable to determine" where the standard requires it. Goes directly to what the signer was permitted to say.
Automated and AI prompts Vendor advisories, coding nudges, and language drafted by a large language model treated as exempt. Same obligations apply; the organization is accountable for every query delivered.

Two corrections go with this. Multiple choice is always acceptable, with no minimum or maximum number of options, and a query may offer a diagnosis that is not yet in the record so long as it cites clinical indicators that support it. What is not acceptable is a yes or no question used to obtain a diagnosis no provider has written down.

The two-step screen Ask two questions, in this order. First, does the addendum meet the three recordkeeping rules? If it does not, stop there. The entry is excluded and nothing else matters. Second, was the query built correctly, and does the chart written at the time show the evaluation, treatment, or decision-making that makes the diagnosis reportable? Starting with the date instead pulls the wrong charts. A late query built correctly holds up. A same-day query built badly does not.
3
Recordkeeping principles
Identification, date and author, preservation of original content. All three decide admissibility
30 days
Beyond which weight drops
Less weight on review; a pattern past the window may warrant fraud referral
Zero
Cases on the signature alone
No reported decision or settlement holding a physician liable solely for signing a query addendum
Michael Hill, MD & Associates
The Claims Dispute Resolution Company
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Timing Is Not the Finding
September 10, 2026
03

What the Cases Actually Hold

The falsity cases do not agreeWinter and Polukoff get cited for the idea that a clinical judgment can be false under the False Claims Act (FCA, the federal law penalizing false claims for payment). Read them closely. Both are early-stage rulings that a case could go forward, both concern certifying medical necessity rather than diagnostic coding, and neither involves a query or an addendum. AseraCare and Care Alternatives then split on whether a reasonable difference of clinical opinion can be false at all, and the Supreme Court has not resolved it.

What the signer believed decides itSchutte v. SuperValu was unanimous: what counts is what the person actually knew and believed, not what a reasonable person would have believed. That cuts both ways, and it makes one question decisive. What was the signer looking at when the signature went on? A query that cites its indicators, asks a neutral question, and offers a real alternative is evidence of good faith. One that supplied the interpretation and offered only agreement is evidence the other way. Escobar sets the limit at the far end: materiality is demanding, and departing from a professional practice brief is not automatically material to payment.

Put the three together and they describe one sequence. The standard tells you whether the query was built properly. The manual tells you whether the addendum can be counted at all. The case law tells you how far a finding built on either one can be pushed, and how far it cannot: no reported decision has found a physician liable for signing a query addendum and nothing more, so that exposure is a risk model built on the statute rather than a holding. Run the three in that order and a file sorts itself, into entries excluded on their face and entries that have to be argued on the record. Run them starting with the date and you get a stack of charts that will not hold. Sorting the file correctly is the work, and it is slow, and it is usually where we are brought in.

Where MHMDAA Comes In

MHMDAA (Michael Hill, MD and Associates) is a revenue cycle consulting and payor-provider dispute resolution firm. We are retained by payors and providers alike, which is why the screens set out here read as method rather than as argument. A finding that cannot be sustained on the query document and on the chart written at the time is one that neither side should be spending money on. Neither the reviewer working a validation queue nor the hospital defending an addendum is being unreasonable. They are running two different screens, and only one of them holds up.

Michael Hill, MD & Associates
A revenue cycle consulting and payor-provider dispute resolution firm
(877) 464-4556 · info@mhmdaa.com
Neutrality. This brief is educational commentary; it is not legal, coding, or clinical advice, and it is not a determination about any specific claim, payor, provider, or matter. MHMDAA is an independent revenue cycle consulting and payor-provider dispute resolution firm; its principals provide dual-perspective analysis and independent expert services to payors and providers alike, and nothing in this publication constitutes advocacy for either side of any dispute or prejudges any question on which they may serve as independent experts.
Authorship. This document was drafted with human authorship and may include AI-assisted formatting or summarization. All analysis, conclusions, and opinions are solely those of Dr. Michael Hill.

Sources

Michael Hill, MD & Associates
The Claims Dispute Resolution Company
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