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ICD-10/O24.119

O24.119 ICD-10-CM Code: Pre-existing type 2 diabetes mellitus, in pregnancy, unspecified trimester

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 817 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH MCC (MDC 14)
  • MS-DRG 818 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH CC (MDC 14)
  • MS-DRG 819 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITHOUT CC/MCC (MDC 14)
  • MS-DRG 831 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH MCC (MDC 14)
  • MS-DRG 832 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH CC (MDC 14)
  • MS-DRG 833 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITHOUT CC/MCC (MDC 14)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Official Registry Overview & Definition

Pre-existing type 2 diabetes mellitus, in pregnancy, unspecified trimester is a billable ICD-10-CM diagnosis code (O24.119).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for O24.119 in the official ICD-10-CM tabular list.

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

  • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48) Compare O24.119 vs O30 →
  • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99) Compare O24.119 vs O98 →

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code (for):
  • from category E11 to further identify any manifestations
  • injectable non-insulin antidiabetic drugs (Z79.85)
  • long-term (current) use of insulin (Z79.4)

Change history

  • FY2017 — 2016-10-01
    Description revised
    Pre-existing diabetes mellitus, type 2, in pregnancy, unspecified trimester → Pre-existing type 2 diabetes mellitus, in pregnancy, unspecified trimester
    FY2017 changes
  • FY2017 — 2016-10-01
    Short description revised
    Pre-existing diabetes, type 2, in pregnancy, unsp trimester → Pre-exist type 2 diabetes, in pregnancy, unsp trimester
    FY2017 changes

Verify Before Coding

  • Billable — reportable as written.
  • Age-restricted: the Medicare Code Editor lists this as a maternity (age 9-64) diagnosis; other ages are presumed incorrect.
  • CC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of O24.119 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • O00-O9A — Chapter 15: Pregnancy, Childbirth and the Puerperium (O00-O9A) (O00-O9A) [Hierarchy]
  • O20-O29 — Other maternal disorders predominantly related to pregnancy [Hierarchy]
  • O24 — Clinical Diagnosis [Hierarchy]
  • O24.1 — Clinical Diagnosis [Hierarchy]
  • O24.11 — Clinical Diagnosis [Hierarchy]

Referenced by Excludes1 notes

  • R73 — Elevated blood glucose level [Excludes1](via O24.-): “diabetes mellitus in pregnancy, childbirth and the puerperium (O24.-)” · check together

Referenced by Excludes2 notes

  • O99.2 — Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium [Excludes2](via O24.-): “diabetes mellitus (O24.-)” · check together

Clinical classification (CCSR)

  • PRG019 — Diabetes or abnormal glucose tolerance complicating pregnancy; childbirth; or the puerperium [CCSR]
  • END002 — Diabetes mellitus without complication [CCSR]
  • END005 — Diabetes mellitus, Type 2 [CCSR]

Potential MS-DRG

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”
  • DRG 817 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH MCC [MS-DRG]: “OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH MCC (MDC 14)”
  • DRG 818 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH CC [MS-DRG]: “OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITH CC (MDC 14)”
  • DRG 819 — OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITHOUT CC/MCC [MS-DRG]: “OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURES WITHOUT CC/MCC (MDC 14)”
  • DRG 831 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH MCC [MS-DRG]: “OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH MCC (MDC 14)”
  • DRG 832 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH CC [MS-DRG]: “OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITH CC (MDC 14)”
  • DRG 833 — OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITHOUT CC/MCC [MS-DRG]: “OTHER ANTEPARTUM DIAGNOSES WITHOUT O.R. PROCEDURES WITHOUT CC/MCC (MDC 14)”

MDC crossing · procedures (94)

  • MDC 14 — Pregnancy, Childbirth and the Puerperium [MDC crossing]: “Pregnancy, Childbirth and the Puerperium — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • 0U570ZZ — Destruction of Bilateral Fallopian Tubes, Open Approach [Same-MDC procedure]: “Destruction of Bilateral Fallopian Tubes, Open Approach — grouped in MDC 14, the procedure side of this code's crossing.” · check together
  • 0U573ZZ — Destruction of Bilateral Fallopian Tubes, Percutaneous Approach [Same-MDC procedure]: “Destruction of Bilateral Fallopian Tubes, Percutaneous Approach — grouped in MDC 14, the procedure side of this code's crossing.” · check together
  • 0U574ZZ — Destruction of Bilateral Fallopian Tubes, Percutaneous Endoscopic Approach [Same-MDC procedure]: “Destruction of Bilateral Fallopian Tubes, Percutaneous Endoscopic Approach — grouped in MDC 14, the procedure side of this code's crossing.” · check together
  • 0U577ZZ — Destruction of Bilateral Fallopian Tubes, Via Natural or Artificial Opening [Same-MDC procedure]: “Destruction of Bilateral Fallopian Tubes, Via Natural or Artificial Opening — grouped in MDC 14, the procedure side of this code's crossing.” · check together
  • 0U578ZZ — Destruction of Bilateral Fallopian Tubes, Via Natural or Artificial Opening Endoscopic [Same-MDC procedure]: “Destruction of Bilateral Fallopian Tubes, Via Natural or Artificial Opening Endoscopic — grouped in MDC 14, the procedure side of this code's crossing.” · check together
  • and 89 more

Nearest codes (40)

  • O24 — Diabetes mellitus in pregnancy, childbirth, and the puerperium [Sibling]
  • O24.0 — Pre-existing type 1 diabetes mellitus, in pregnancy, childbirth and the puerperium [Sibling]
  • O24.01 — Pre-existing type 1 diabetes mellitus, in pregnancy [Sibling]
  • O24.011 — Pre-existing type 1 diabetes mellitus, in pregnancy, first trimester [Sibling]
  • O24.012 — Pre-existing type 1 diabetes mellitus, in pregnancy, second trimester [Sibling]
  • O24.013 — Pre-existing type 1 diabetes mellitus, in pregnancy, third trimester [Sibling]
  • O24.019 — Pre-existing type 1 diabetes mellitus, in pregnancy, unspecified trimester [Sibling]
  • O24.02 — Pre-existing type 1 diabetes mellitus, in childbirth [Sibling]
  • and 32 more

Change history (2)

  • FY2017 — Description revised [Change history]
  • and 1 more

Referenced by Other Codes

Clinical classification (AHRQ CCSR):PRG019 — Diabetes or abnormal glucose tolerance complicating pregnancy; childbirth; or the puerperium (default); END002 — Diabetes mellitus without complication; END005 — Diabetes mellitus, Type 2.

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Potential MS-DRG Relationships (FY2026)

CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 250 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 6 MS-DRGs: DRG 817 (MDC 14), DRG 818 (MDC 14), DRG 819 (MDC 14), DRG 831 (MDC 14), DRG 832 (MDC 14), DRG 833 (MDC 14).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Official ICD-10-CM tabular notes on other codes that name O24.119 or its code family.

1 Excludes1 notes: R73 (via O24.-).

1 Excludes2 notes: O99.2 (via O24.-).

Nearest Codes in This Family

Official ICD-10-CM classifications closest to O24.119 in its code family, with their registry titles.

  • O24.1 — Pre-existing type 2 diabetes mellitus, in pregnancy, childbirth and the puerperium
  • O24.11 — Pre-existing type 2 diabetes mellitus, in pregnancy
  • O24.111 — Pre-existing type 2 diabetes mellitus, in pregnancy, first trimester
  • O24.112 — Pre-existing type 2 diabetes mellitus, in pregnancy, second trimester
  • O24.113 — Pre-existing type 2 diabetes mellitus, in pregnancy, third trimester
  • O24.12 — Pre-existing type 2 diabetes mellitus, in childbirth
  • O24.13 — Pre-existing type 2 diabetes mellitus, in the puerperium
  • O24.3 — Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium
  • O24.31 — Unspecified pre-existing diabetes mellitus in pregnancy
  • O24.311 — Unspecified pre-existing diabetes mellitus in pregnancy, first trimester

View all codes in the O24 family