DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

O85 diagnosis code · Billable category · FY2027

O85 Puerperal sepsis

  • Billable
  • MCC
  • POA reported

O85 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.

Where it sits

  1. Chapter 15 Pregnancy, childbirth and the puerperium (O00-O9A)
  2. O85-O92 Complications predominantly related to the puerperium (O85-O92)
  3. O85 Puerperal sepsis
CC / MCC
MCC
MS-DRG
769, 776
HCC V28
–
POA
Reported
Code Editor
Maternity
Index entries
21

Instructions

At O85

Inclusion terms

  • Postpartum sepsis
  • Puerperal peritonitis
  • Puerperal pyemia

Excludes1

  • fever of unknown origin following delivery (O86.4) O86.4
  • obstetric pyemic and septic embolism (O88.3-) O88.3
  • puerperal septic thrombophlebitis (O86.81) O86.81

Excludes2

  • genital tract infection following delivery (O86.1-) O86.1
  • sepsis during labor (O75.3) O75.3
  • urinary tract infection following delivery (O86.2-) O86.2

Use additional code

  • code (B95-B97), to identify infectious agent B95 B97
  • code (R65.2-) to identify severe sepsis, if applicable R65.2

Notes that also apply

Block O85-O92 instructions (Excludes2 3): printed on the block page.

Chapter 15 instructions (Notes 6, Excludes1 1, Excludes2 4, Use additional code 1): printed on the chapter 15 page.

Index entries

  • Pelviperitonitispuerperal → O85
  • Peritonitis (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion)puerperal, postpartum, childbirth → O85
  • Puerperal, puerperium (complicated by, complications)metroperitonitis → O85
  • Puerperal, puerperium (complicated by, complications)parametritis → O85
  • Puerperal, puerperium (complicated by, complications)pelviperitonitis → O85
  • Puerperal, puerperium (complicated by, complications)peritoneal infection → O85
  • Puerperal, puerperium (complicated by, complications)peritonitis (pelvic) → O85
  • Puerperal, puerperium (complicated by, complications)pyemia → O85
  • Puerperal, puerperium (complicated by, complications)pyohemia → O85
  • Puerperal, puerperium (complicated by, complications)salpingoperitonitis → O85
  • Puerperal, puerperium (complicated by, complications)sepsis (pelvic) → O85
  • Pyemia, pyemic (fever) (infection) (purulent)puerperal, postpartum, childbirth → O85
  • Sepsis (generalized) (unspecified organism)pelvic, puerperal, postpartum, childbirth → O85
  • Sepsis (generalized) (unspecified organism)puerperal, postpartum, childbirth (pelvic) → O85
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)peritoneum, peritoneal (perforated) (ruptured)puerperal, postpartum, childbirth → O85
  • Infection, infected, infective (opportunistic)majorpuerperal, postpartum, childbirth → O85
  • Infection, infected, infective (opportunistic)puerperalmajor or generalized → O85
  • Puerperal, puerperium (complicated by, complications)abscessperitoneum → O85
  • Puerperal, puerperium (complicated by, complications)fever (of unknown origin)septic → O85
  • Puerperal, puerperium (complicated by, complications)infectiongeneralized → O85
  • Puerperal, puerperium (complicated by, complications)infectionperitoneum → O85

NCHS Alphabetic Index. Index first, then the Tabular List.

Medicare grouping and edits

CMS files for O85
CC / MCCMCC
PDX exclusion list1407 (225 codes)
Appendix BMDC 14 Pregnancy, Childbirth and the Puerperium, MS-DRG 769 (Postpartum and Post Abortion Diagnoses with O.R. Procedures…); MDC 14 Pregnancy, Childbirth and the Puerperium, MS-DRG 776 (Postpartum and Post Abortion Diagnoses without O.R. Procedures…)
Code EditorAge conflict: maternity diagnosis (age 9–64)
POAReported
HCC V28–

MCC as a secondary diagnosis, not when the principal diagnosis is on its PDX exclusion list.

CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.

Hierarchy