Extended criteria (experimental).
This is the broader ten-condition engine, kept as a secondary area. It shows ICD-10-CM codes and illustrative grouping effects
for CDI staff. The primary surface is Before you sign (kidney, measurement only).
All extended pages.
← Back to the worklist · Whole encounter ENC-00087
Lena Northam: Heart failure
ENC-00087 · 78M · Hospital Medicine · admitted Mon Nov 09, 2026 01:46 PM · in hospital · attending Dr. Kenji Stavros · resident Dr. Elena Nakashima
Specificity gap Criteria met Open
In hospital: concurrent review Resident note awaiting attending cosign
Documented “congestive heart failure” (I50.9); criteria support the more specific Acute on chronic diastolic (HFpEF) heart failure (I50.33).
Documented vs supported
- Documented
- “congestive heart failure” · I50.9 Heart failure, unspecified
- Criteria support
- Acute on chronic diastolic (HFpEF) heart failure · I50.33 Acute on chronic diastolic (congestive) heart failure
- Outcome
- LVEF 65% with 3 acute indicators and prior heart failure
- Rule
- Heart failure type (LVEF) and acuity v2026.11-1
- Published source
- Universal Definition and Classification of Heart Failure (HFSA/HFA/JHFS, 2021), as restated in Chandramouli et al., Clin Cardiol 2022 (2021), LVEF classification: HFrEF <=40%, HFmrEF 41-49%, HFpEF >=50%; HFimpEF = baseline <=40%, rise >=10 points, second LVEF >40% · source (checked 2026-11-14)
- Contested
- No guideline gives a numeric definition of "acute" versus "chronic" heart failure. This rule uses a LOCAL CONVENTION: at least two acute indicators (IV loop diuretic, elevated natriuretic peptide, new oxygen requirement) = acute; with a prior history of heart failure = acute on chronic; none with history = chronic; exactly one = clinical judgement.
Effect if the clinician agrees (illustrative)
- Change
- I50.9 -> I50.33
- Secondary-diagnosis level
- non-CC → MCC
- MS-DRG (illustrative)
- 871 Septicemia or severe sepsis without MV >96 hours with MCC → 871 Septicemia or severe sepsis without MV >96 hours with MCC
- Relative weight
- 1.9425 → 1.9425 (+0.0000)
- Codes before
- A41.9, N39.0, N18.9, I50.9, J96.01, D64.9
- Codes after
- A41.9, N39.0, N18.9, J96.01, D64.9, I50.33
All open gaps on this encounter together: MS-DRG 871 → 871 (RW +0.0000). The grouping does not change; the record becomes accurate.
CC/MCC status, CC exclusions (subset) and relative weights from the public CMS FY2026 IPPS final rule tables (5, 6I, 6J, 6K). This is not a grouper and not a payment estimate. Queries never mention any of this.
Severity documentation index change SIMULATED
1.0 points
SIMULATED: Illustrative severity weights (MCC = 1.0, CC = 0.5, non-CC = 0) summed over secondary diagnoses; not a validated risk-adjustment model and not a measured effect.
Evidence
Structured values are read by code from the cited rows. Note facts are shown only when the model's quote was found verbatim in the note.
| Input | Value | Source |
|---|---|---|
| Latest LVEF within 12 months (%) | 65.0 |
echo LVEF 65%
|
| IV loop diuretic given this stay | True |
furosemide 40 mg IV
furosemide 40 mg IV
furosemide 40 mg IV
furosemide 40 mg IV
|
| Highest BNP this stay (pg/mL) | 2364.0 |
BNP 2364 pg/mL
|
| Supplemental oxygen started this stay without home oxygen supplemental oxygen started this stay without home oxygen on file |
True |
O2 1 L/min (nasal cannula)
|
| Prior heart failure on the problem list / history | True |
history: heart failure with preserved ejection fraction
|
Rule trace (inputs, thresholds, outcome)
| Step | Expression | Inputs and thresholds read | Result |
|---|---|---|---|
| derived: np_elevated | coalesce(bnp_max >= t.bnp, false) or coalesce(ntprobnp_max >= t.ntprobnp, false) |
bnp_max=2364.0, ntprobnp_max=unknown, t.bnp=100, t.ntprobnp=300 | true |
| derived: acute_count | count(iv_loop_diuretic, np_elevated, new_o2) |
iv_loop_diuretic=True, new_o2=True, np_elevated=True | 3 |
| derived: hf_type | case(lvef <= t.ref, 'systolic', lvef >= t.pres, 'diastolic', 'midrange') |
lvef=65.0, t.pres=50, t.ref=40 | diastolic |
| derived: improved | coalesce(lvef_prior_min <= t.ref and lvef > t.ref and lvef - lvef_prior_min >= t.improved_rise, false) |
lvef=65.0, lvef_prior_min=unknown, t.improved_rise=10, t.ref=40 | false |
| derived: acuity | case(acute_count >= 2 and hf_history, 'acute on chronic', acute_count >= 2, 'acute', acute_count == 0 and hf_history, 'chronic', null) |
acute_count=3, hf_history=True | acute on chronic |
| outcome: improved_ef | improved |
improved=False | false |
| outcome: midrange | hf_type == 'midrange' |
hf_type=diastolic | false |
| outcome: sys_aoc | hf_type == 'systolic' and acuity == 'acute on chronic' |
acuity=acute on chronic, hf_type=diastolic | false |
| outcome: sys_acute | hf_type == 'systolic' and acuity == 'acute' |
acuity=acute on chronic, hf_type=diastolic | false |
| outcome: sys_chronic | hf_type == 'systolic' and acuity == 'chronic' |
acuity=acute on chronic, hf_type=diastolic | false |
| outcome: dia_aoc | hf_type == 'diastolic' and acuity == 'acute on chronic' |
acuity=acute on chronic, hf_type=diastolic | true |
Documentation query
Title and question drafted by model clockworks-mock (audit entry #2136); clinical indicators and answer options assembled by code from the rule and the record.
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DOCUMENTATION QUERY (draft) Title: Clarification request: cardiac documentation Encounter: ENC-00087 Patient: Lena Northam To: Dr. Kenji Stavros Clinical indicators from the health record: - Documented in the record: "congestive heart failure" [Progress note DOC-000297] - echo LVEF 65% (2026-11-10 13:46) [echo ECH-000040] - furosemide 40 mg IV (2026-11-09 20:00) [med MED-000337] - furosemide 40 mg IV (2026-11-10 08:00) [med MED-000338] - furosemide 40 mg IV (2026-11-10 20:00) [med MED-000339] - furosemide 40 mg IV (2026-11-11 08:00) [med MED-000340] - BNP 2364 pg/mL (2026-11-09 14:46) [lab LAB-002924] - O2 1 L/min (nasal cannula) (2026-11-09 22:11) [vital VIT-008395] - history: heart failure with preserved ejection fraction [history HX-000031] Question: Based on your clinical judgement and the indicators above, can the type and acuity of the heart failure being treated be further specified? Response options (select one or write your own): ( ) Acute on chronic diastolic heart failure (HFpEF) ( ) Chronic diastolic heart failure (HFpEF) ( ) Other (please specify): ____________ ( ) Unable to determine Please respond based on your independent clinical judgement. Any response, including "unable to determine", is acceptable. This query and your response are kept as part of the health record.
Other findings on this encounter
- Chronic kidney disease · Specificity gap Documented “CKD” (N18.9); criteria support the more specific Chronic kidney disease stage 3a (N18.31).
- Obesity · Specificity gap Criteria support Obesity, class 3 (E66.813); no corresponding diagnosis is documented.
- Acute respiratory failure · Clinical validation gap Documented “acute respiratory failure with hypoxia” (J96.01) but the criteria are not met: No hypoxaemia on room air (lowest SpO2 93%), oxygen no more than 1 L/min, no advanced support.
History
| Seq | When (UTC) | Actor | Action | Entities | Decision / reason | Model / hashes |
|---|---|---|---|---|---|---|
| 2136 | 2026-11-14T20:57:24 | system:llm system |
llm.call |
ENC-00087, ENC-00087.heart_failure | — | clockworks-mock mock-1/exactdx.draft_query@1 prompt 97eeabcf72dd output 752ce96b1cd3 entry f00c87a9f6e1 |
| 1310 | 2026-11-14T19:24:29 | system:llm system |
llm.call |
ENC-00087, ENC-00087.heart_failure | — | clockworks-mock mock-1/exactdx.draft_query@1 prompt 97eeabcf72dd output 752ce96b1cd3 entry d76044d7f33a |
| 568 | 2026-11-14T18:29:05 | system:llm system |
llm.call |
ENC-00087, ENC-00087.heart_failure | — | clockworks-mock mock-1/exactdx.draft_query@1 prompt 97eeabcf72dd output 752ce96b1cd3 entry a4f5ebecb148 |