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, third trimester is a billable ICD-10-CM diagnosis code (O24.113).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for O24.113 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 O24.113 vs O30 →
maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99) Compare O24.113 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)

Frequently Compared Codes

The official Excludes notes on O24.113 name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

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

Verify Before Coding

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 O24.113 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 O24.113 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 O24.113 in its code family, with their registry titles.

O24.03 — Pre-existing type 1 diabetes mellitus, in the puerperium
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
O24.119 — Pre-existing type 2 diabetes mellitus, in pregnancy, unspecified 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

View all codes in the O24 family

O24.113 ICD-10-CM Code: Pre-existing type 2 diabetes mellitus, in pregnancy, third trimester