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Camila Upfield: Acute respiratory failure
ENC-00085 · 76M · Hospital Medicine · admitted Sat Oct 31, 2026 07:25 PM · discharged Tue Nov 03, 2026 10:16 AM · attending Dr. Wes Merriweather · resident Dr. Noor Halvorsen
Documented “acute hypoxic respiratory failure” (J96.01) but the criteria are not met: No hypoxaemia on room air (lowest SpO2 94%), oxygen no more than 2 L/min, no advanced support.
Documented vs supported
- Documented
- “acute hypoxic respiratory failure” · J96.01 Acute respiratory failure with hypoxia
- Criteria support
- criteria not met
- Outcome
- No hypoxaemia on room air (lowest SpO2 94%), oxygen no more than 2 L/min, no advanced support
- Rule
- Acute hypoxic respiratory failure v2026.11-1
- Published source
- Merck Manual Professional Version: Acute Hypoxemic Respiratory Failure (AHRF), including ARDS (2026), Definition/evaluation: PaO2 <60 mmHg, PaO2/FiO2 <300, or SpO2 <88%, with dyspnea and tachypnea · source (checked 2026-11-14)
- Contested
- Organizations use different oxygen-saturation cut-offs (SpO2 <88%, <=90% or <91% on room air). This rule uses <88% (the source above) and a LOCAL respiratory-rate cut-off of 28/min as one sign of respiratory distress.
Effect if the clinician agrees (illustrative)
- Change
- remove J96.01
- Secondary-diagnosis level
- MCC → removed
- 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, I50.20, J96.01, L89.154, I10
- Codes after
- A41.9, N39.0, I50.20, L89.154, I10
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 |
|---|---|---|
| Lowest SpO2 on room air (%) | 94.0 |
SpO2 94% on room air
|
| Highest respiratory rate (/min) | 21.0 |
respiratory rate 21/min
|
| Highest supplemental oxygen flow (L/min) | 2.0 |
O2 2 L/min (nasal cannula)
|
Rule trace (inputs, thresholds, outcome)
| Step | Expression | Inputs and thresholds read | Result |
|---|---|---|---|
| derived: measured | present(spo2_min_ra) or present(pao2_min_ra) or present(pf_min) |
pao2_min_ra=unknown, pf_min=unknown, spo2_min_ra=94.0 | true |
| derived: hypoxemia | coalesce(spo2_min_ra < t.spo2_ra, false) or coalesce(pao2_min_ra < t.pao2, false) or coalesce(pf_min < t.pf, false) |
pao2_min_ra=unknown, pf_min=unknown, spo2_min_ra=94.0, t.pao2=60, t.pf=300, t.spo2_ra=88 | false |
| derived: distress | coalesce(rr_max >= t.rr_distress, false) or coalesce(wob_increased, false) or adv_resp_support |
adv_resp_support=False, rr_max=21.0, t.rr_distress=28, wob_increased=unknown | false |
| outcome: chronic_baseline | home_o2 and hypoxemia |
home_o2=False, hypoxemia=False | false |
| outcome: met | hypoxemia and distress |
distress=False, hypoxemia=False | false |
| outcome: hypoxemia_only | hypoxemia |
hypoxemia=False | false |
| outcome: not_met | measured and not hypoxemia and o2_max_lpm <= t.o2_low and not adv_resp_support |
adv_resp_support=False, hypoxemia=False, measured=True, o2_max_lpm=2.0, t.o2_low=2 | true |
Documentation query
Title and question drafted by model clockworks-mock (audit entry #2134); clinical indicators and answer options assembled by code from the rule and the record.
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DOCUMENTATION QUERY (draft) Title: Clarification request: respiratory documentation Encounter: ENC-00085 Patient: Camila Upfield To: Dr. Wes Merriweather Clinical indicators from the health record: - Documented in the record: "acute hypoxic respiratory failure" [Progress note DOC-000291] - SpO2 94% on room air (2026-10-31 19:45) [vital VIT-008263] - respiratory rate 21/min (2026-11-01 19:45) [vital VIT-008272] - O2 2 L/min (nasal cannula) (2026-11-01 03:50) [vital VIT-008267] Question: The indicators above are documented in this encounter. Could you clarify the status of the documented respiratory diagnosis? Response options (select one or write your own): ( ) Acute hypoxic respiratory failure: confirmed (please document the supporting clinical information) ( ) Acute hypoxic respiratory failure: ruled out ( ) Other explanation of the clinical findings (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
- Heart failure · Specificity gap Documented “HFrEF” (I50.20); criteria support the more specific Acute systolic (HFrEF) heart failure (I50.21).
History
| Seq | When (UTC) | Actor | Action | Entities | Decision / reason | Model / hashes |
|---|---|---|---|---|---|---|
| 2134 | 2026-11-14T20:57:24 | system:llm system |
llm.call |
ENC-00085, ENC-00085.respiratory_failure | — | clockworks-mock mock-1/exactdx.draft_query@1 prompt 4b440c31629c output 1d1d513022f3 entry c8ffbdf9ed77 |
| 1308 | 2026-11-14T19:24:29 | system:llm system |
llm.call |
ENC-00085, ENC-00085.respiratory_failure | — | clockworks-mock mock-1/exactdx.draft_query@1 prompt 4b440c31629c output 1d1d513022f3 entry 7bc4936f2af7 |
| 566 | 2026-11-14T18:29:05 | system:llm system |
llm.call |
ENC-00085, ENC-00085.respiratory_failure | — | clockworks-mock mock-1/exactdx.draft_query@1 prompt 4b440c31629c output 1d1d513022f3 entry d79669846ee6 |