DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

O10 Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

  • Header · not billable

O10 is not billable. The category heads 36 billable codes in FY2027, grouped under 6 subdivisions.

Index → code

  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpregnancypre-existing → O10.91-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingchildbirth (labor)secondary → O10.42
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingchildbirth (labor)pre-existing → O10.92

Where it sits

  1. Chapter 15 Pregnancy, childbirth and the puerperium (O00-O9A)
  2. O10-O16 Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)
  3. O10 Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
Billable codes
36
Subdivisions
6
CC / MCC codes
12 / 1
HCC V28 codes
0
New FY2027
0
Index entries
20

Codes in O10

  1. O10.0
    Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium
    Header
    Inclusion terms 1

    Inclusion terms

    • Any condition in I10 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium I10
  2. O10.01
    Pre-existing essential hypertension complicating pregnancy
    Header
  3. O10.011
    Pre-existing essential hypertension complicating pregnancy, first trimester
    BillableCC
  4. O10.012
    Pre-existing essential hypertension complicating pregnancy, second trimester
    BillableCC
  5. O10.013
    Pre-existing essential hypertension complicating pregnancy, third trimester
    BillableCC
  6. O10.019
    Pre-existing essential hypertension complicating pregnancy, unspecified trimester
    Billable
  7. O10.02
    Pre-existing essential hypertension complicating childbirth
    BillableCC
  8. O10.03
    Pre-existing essential hypertension complicating the puerperium
    Billable
  9. O10.1
    Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperium
    Header
    Inclusion terms 1, Use additional code 1

    Inclusion terms

    • Any condition in I11 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium I11

    Use additional code

    • code from I11 to identify the type of hypertensive heart disease I11
  10. O10.11
    Pre-existing hypertensive heart disease complicating pregnancy
    Header
  11. O10.111
    Pre-existing hypertensive heart disease complicating pregnancy, first trimester
    Billable
  12. O10.112
    Pre-existing hypertensive heart disease complicating pregnancy, second trimester
    Billable
  13. O10.113
    Pre-existing hypertensive heart disease complicating pregnancy, third trimester
    Billable
  14. O10.119
    Pre-existing hypertensive heart disease complicating pregnancy, unspecified trimester
    Billable
  15. O10.12
    Pre-existing hypertensive heart disease complicating childbirth
    Billable
  16. O10.13
    Pre-existing hypertensive heart disease complicating the puerperium
    Billable
  17. O10.2
    Pre-existing hypertensive chronic kidney disease complicating pregnancy, childbirth and the puerperium
    Header
    Inclusion terms 1, Use additional code 1

    Inclusion terms

    • Any condition in I12 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium I12

    Use additional code

    • code from I12 to identify the type of hypertensive chronic kidney disease I12
  18. O10.21
    Pre-existing hypertensive chronic kidney disease complicating pregnancy
    Header
  19. O10.211
    Pre-existing hypertensive chronic kidney disease complicating pregnancy, first trimester
    Billable
  20. O10.212
    Pre-existing hypertensive chronic kidney disease complicating pregnancy, second trimester
    Billable
  21. O10.213
    Pre-existing hypertensive chronic kidney disease complicating pregnancy, third trimester
    Billable
  22. O10.219
    Pre-existing hypertensive chronic kidney disease complicating pregnancy, unspecified trimester
    Billable
  23. O10.22
    Pre-existing hypertensive chronic kidney disease complicating childbirth
    Billable
  24. O10.23
    Pre-existing hypertensive chronic kidney disease complicating the puerperium
    Billable
  25. O10.3
    Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, childbirth and the puerperium
    Header
    Inclusion terms 1, Use additional code 1

    Inclusion terms

    • Any condition in I13 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium I13

    Use additional code

    • code from I13 to identify the type of hypertensive heart and chronic kidney disease I13
  26. O10.31
    Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy
    Header
  27. O10.311
    Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, first trimester
    Billable
  28. O10.312
    Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, second trimester
    Billable
  29. O10.313
    Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, third trimester
    Billable
  30. O10.319
    Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, unspecified trimester
    Billable
  31. O10.32
    Pre-existing hypertensive heart and chronic kidney disease complicating childbirth
    Billable
  32. O10.33
    Pre-existing hypertensive heart and chronic kidney disease complicating the puerperium
    Billable
  33. O10.4
    Pre-existing secondary hypertension complicating pregnancy, childbirth and the puerperium
    Header
    Inclusion terms 1, Use additional code 1

    Inclusion terms

    • Any condition in I15 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium I15

    Use additional code

    • code from I15 to identify the type of secondary hypertension I15
  34. O10.41
    Pre-existing secondary hypertension complicating pregnancy
    Header
  35. O10.411
    Pre-existing secondary hypertension complicating pregnancy, first trimester
    BillableCC
  36. O10.412
    Pre-existing secondary hypertension complicating pregnancy, second trimester
    BillableCC
  37. O10.413
    Pre-existing secondary hypertension complicating pregnancy, third trimester
    BillableCC
  38. O10.419
    Pre-existing secondary hypertension complicating pregnancy, unspecified trimester
    Billable
  39. O10.42
    Pre-existing secondary hypertension complicating childbirth
    BillableMCC
  40. O10.43
    Pre-existing secondary hypertension complicating the puerperium
    BillableCC
  41. O10.9
    Unspecified pre-existing hypertension complicating pregnancy, childbirth and the puerperium
    Header
  42. O10.91
    Unspecified pre-existing hypertension complicating pregnancy
    Header
  43. O10.911
    Unspecified pre-existing hypertension complicating pregnancy, first trimester
    BillableCC
  44. O10.912
    Unspecified pre-existing hypertension complicating pregnancy, second trimester
    BillableCC
  45. O10.913
    Unspecified pre-existing hypertension complicating pregnancy, third trimester
    BillableCC
  46. O10.919
    Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester
    Billable
  47. O10.92
    Unspecified pre-existing hypertension complicating childbirth
    BillableCC
  48. O10.93
    Unspecified pre-existing hypertension complicating the puerperium
    Billable

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At O10

Includes

  • pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium

Excludes2

  • pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-) O11

Notes that also apply

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

Index entries

  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingchildbirth (labor)secondary → O10.42
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpuerperium, pre-existingsecondary → O10.43
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpregnancypre-existing → O10.91-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingchildbirth (labor)pre-existing → O10.92
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpregnancypre-existingessential → O10.01-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingchildbirth (labor)pre-existingessential → O10.02
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpuerperium, pre-existingpre-existingessential → O10.03
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpregnancypre-existingsecondary → O10.41-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpregnancypre-existingwithheart disease → O10.11-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingchildbirth (labor)pre-existingwithheart disease → O10.12
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpuerperium, pre-existingpre-existingwithheart disease → O10.13
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpregnancypre-existingwithrenal disease → O10.21-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingchildbirth (labor)pre-existingwithrenal disease → O10.22
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpuerperium, pre-existingpre-existingwithrenal disease → O10.23
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpregnancypre-existingwithheart diseasewith renal disease → O10.31-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpregnancypre-existingwithrenal diseasewith heart disease → O10.31-
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingchildbirth (labor)pre-existingwithheart diseasewith renal disease → O10.32
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingchildbirth (labor)pre-existingwithrenal diseasewith heart disease → O10.32
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpuerperium, pre-existingpre-existingwithheart diseasewith renal disease → O10.33
  • Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)complicatingpuerperium, pre-existingpre-existingwithrenal diseasewith heart disease → O10.33

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

Hierarchy