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Nico Bellweather: Acute blood loss anaemia

ENC-00130 · 72M · Hospital Medicine · admitted Tue Oct 27, 2026 08:56 PM · discharged Tue Nov 03, 2026 12:32 PM · attending Dr. Kenji Stavros · resident Dr. Camila Oyelaran

Specificity gap Criteria met Open

Criteria support Acute blood loss anemia (D62); no corresponding diagnosis is documented.

Documented vs supported

Documented: not documented
Criteria support: Acute blood loss anemia · D62 Acute posthemorrhagic anemia
Outcome: Haemoglobin fell 3.5 g/dL to 9.7 with 2 unit(s) transfused and a documented bleeding source
Rule: Acute blood loss anaemia v2026.11-1
Published source: WHO guideline on haemoglobin cutoffs to define anaemia in individuals and populations (2024), Adult cut-offs: men <13 g/dL, non-pregnant women <12 g/dL (unchanged from 2011) · source (checked 2026-11-14)
Contested: There is no published clinical definition of "acute blood loss anaemia". This rule is a LOCAL CONVENTION: WHO anaemia threshold at the nadir, a documented bleeding source, and an acute fall of >=2 g/dL OR >=2 units transfused (borrowed from the ISTH major-bleeding definition, which secondary restatements word inconsistently as AND/OR).

Effect if the clinician agrees (illustrative)

Change: add D62
Secondary-diagnosis level: — → CC
MS-DRG (illustrative): 193 Simple pneumonia and pleurisy with MCC → 193 Simple pneumonia and pleurisy with MCC
Relative weight: 1.3144 → 1.3144 (+0.0000)
Codes before: J18.9, E43, E78.5, I10, K21.9
Codes after: J18.9, E43, E78.5, I10, K21.9, D62

All open gaps on this encounter together: MS-DRG 193 → 194 (RW -0.5085).

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

0.5 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.

Evidence (each item cited to a source row or a quoted span)
Input	Value	Source
Sex	M	sex M · encounter ENC-00130
First haemoglobin this stay (g/dL)	13.16	hemoglobin 13.16 g/dL (first) · lab LAB-004439 · 2026-10-27 21:56
Lowest haemoglobin this stay (g/dL)	9.67	hemoglobin 9.67 g/dL (lowest) · lab LAB-004441 · 2026-10-29 05:00
Highest value before the nadir minus the nadir (g/dL) highest value before the nadir minus the nadir	3.5	hemoglobin 13.16 · lab LAB-004439 · 2026-10-27 21:56 hemoglobin 9.67 · lab LAB-004441 · 2026-10-29 05:00
Red cell units transfused	2	transfuse 2 unit(s) PRBC · order ORD-000112 · 2026-10-28 09:00
A bleeding source quoted from a note, or a bleeding principal diagnosis	True	“bleeding from the surgical drain” · History and physical DOC-000439, p. 1, line 5 · quoted span verified Show the quote in the note … dmitted with community-acquired pneumonia. Chest x-ray shows multifocal pneumonia; blood cultures drawn and ceftriaxone started. Hospital course complicated by bleeding from the surgical drain. Past medical history: hyperlipidemia, hypertension, GERD. Review of systems otherwise negative. Exam: Lungs: scattered crackles at the bases, no distress. Ass …

Rule trace (inputs, thresholds, outcome)

Rule trace (rule blood_loss_anemia v2026.11-1; evaluated in order, first true outcome wins; "unknown" = missing input)
Step	Expression	Inputs and thresholds read	Result
derived: anaemic	`case(sex == 'M', hgb_nadir < t.hb_m, sex == 'F', hgb_nadir < t.hb_f, null)`	hgb_nadir=9.67, sex=M, t.hb_f=12, t.hb_m=13	true
derived: acute_fall	`hgb_drop >= t.drop_major or prbc_units >= t.prbc_major`	hgb_drop=3.5, prbc_units=2, t.drop_major=2.0, t.prbc_major=2	true
outcome: met	`bleeding_documented and anaemic and acute_fall`	acute_fall=True, anaemic=True, bleeding_documented=True	true

Documentation query

Title and question drafted by model clockworks-mock (audit entry #2219); clinical indicators and answer options assembled by code from the rule and the record.

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DOCUMENTATION QUERY (draft)
Title: Clarification request: hematology documentation
Encounter: ENC-00130   Patient: Nico Bellweather   To: Dr. Kenji Stavros

Clinical indicators from the health record:
- sex M [encounter ENC-00130]
- hemoglobin 13.16 g/dL (first) (2026-10-27 21:56) [lab LAB-004439]
- hemoglobin 9.67 g/dL (lowest) (2026-10-29 05:00) [lab LAB-004441]
- transfuse 2 unit(s) PRBC (2026-10-28 09:00) [order ORD-000112]
- "bleeding from the surgical drain" (2026-10-27 23:56) [History and physical DOC-000439, p. 1, line 5]

Question:
Based on your clinical judgement and the indicators above, can the type or cause of the condition being monitored and treated be further specified?

Response options (select one or write your own):
( ) Acute blood loss anemia
( ) Anemia, type not further specified
( ) 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

Malnutrition · Clinical validation gap Documented “severe protein-calorie malnutrition” (E43) conflicts with what the criteria support (Moderate (non-severe) protein-calorie malnutrition (acute illness context), E44.0).

History

Audit entries for this finding (newest first)
Seq	When (UTC)	Actor	Action	Entities	Decision / reason	Model / hashes
2219	2026-11-14T20:57:25	system:llm system	`llm.call`	ENC-00130, ENC-00130.blood_loss_anemia	—	clockworks-mock mock-1/exactdx.draft_query@1 prompt 6be16a7af78b output bfa18fc1e32e entry d570717c82f3
1393	2026-11-14T19:24:31	system:llm system	`llm.call`	ENC-00130, ENC-00130.blood_loss_anemia	—	clockworks-mock mock-1/exactdx.draft_query@1 prompt 6be16a7af78b output bfa18fc1e32e entry 8710946913d5
651	2026-11-14T18:29:06	system:llm system	`llm.call`	ENC-00130, ENC-00130.blood_loss_anemia	—	clockworks-mock mock-1/exactdx.draft_query@1 prompt 6be16a7af78b output bfa18fc1e32e entry a184f57c0f58