MS-DRG · FY 2026 v43.0
MS-DRG 998 – Principal Diagnosis Invalid as Discharge Diagnosis
An MS-DRG in Ungrouped (Other).
✓ Official CMS v43.0 dataset
279
Diagnosis Codes
ICD-10-CM
Qualifying Diagnosis Codes 279 codes · 26 categories
279 of 279 shown
O09 Supervision of high risk pregnancy64 codes
- O09.00 Supervision of pregnancy with history of infertility, unspecified trimester
- O09.01 Supervision of pregnancy with history of infertility, first trimester
- O09.02 Supervision of pregnancy with history of infertility, second trimester
- O09.03 Supervision of pregnancy with history of infertility, third trimester
- O09.10 Supervision of pregnancy with history of ectopic pregnancy, unspecified trimester
- O09.11 Supervision of pregnancy with history of ectopic pregnancy, first trimester
- O09.12 Supervision of pregnancy with history of ectopic pregnancy, second trimester
- O09.13 Supervision of pregnancy with history of ectopic pregnancy, third trimester
- O09.211 Supervision of pregnancy with history of pre-term labor, first trimester
- O09.212 Supervision of pregnancy with history of pre-term labor, second trimester
- O09.213 Supervision of pregnancy with history of pre-term labor, third trimester
- O09.219 Supervision of pregnancy with history of pre-term labor, unspecified trimester
- O09.291 Supervision of pregnancy with other poor reproductive or obstetric history, first trimester
- O09.292 Supervision of pregnancy with other poor reproductive or obstetric history, second trimester
- O09.293 Supervision of pregnancy with other poor reproductive or obstetric history, third trimester
- O09.299 Supervision of pregnancy with other poor reproductive or obstetric history, unspecified trimester
- O09.30 Supervision of pregnancy with insufficient antenatal care, unspecified trimester
- O09.31 Supervision of pregnancy with insufficient antenatal care, first trimester
- O09.32 Supervision of pregnancy with insufficient antenatal care, second trimester
- O09.33 Supervision of pregnancy with insufficient antenatal care, third trimester
- O09.40 Supervision of pregnancy with grand multiparity, unspecified trimester
- O09.41 Supervision of pregnancy with grand multiparity, first trimester
- O09.42 Supervision of pregnancy with grand multiparity, second trimester
- O09.43 Supervision of pregnancy with grand multiparity, third trimester
- O09.511 Supervision of elderly primigravida, first trimester
- O09.512 Supervision of elderly primigravida, second trimester
- O09.513 Supervision of elderly primigravida, third trimester
- O09.519 Supervision of elderly primigravida, unspecified trimester
- O09.521 Supervision of elderly multigravida, first trimester
- O09.522 Supervision of elderly multigravida, second trimester
- O09.523 Supervision of elderly multigravida, third trimester
- O09.529 Supervision of elderly multigravida, unspecified trimester
- O09.611 Supervision of young primigravida, first trimester
- O09.612 Supervision of young primigravida, second trimester
- O09.613 Supervision of young primigravida, third trimester
- O09.619 Supervision of young primigravida, unspecified trimester
- O09.621 Supervision of young multigravida, first trimester
- O09.622 Supervision of young multigravida, second trimester
- O09.623 Supervision of young multigravida, third trimester
- O09.629 Supervision of young multigravida, unspecified trimester
- O09.70 Supervision of high risk pregnancy due to social problems, unspecified trimester
- O09.71 Supervision of high risk pregnancy due to social problems, first trimester
- O09.72 Supervision of high risk pregnancy due to social problems, second trimester
- O09.73 Supervision of high risk pregnancy due to social problems, third trimester
- O09.811 Supervision of pregnancy resulting from assisted reproductive technology, first trimester
- O09.812 Supervision of pregnancy resulting from assisted reproductive technology, second trimester
- O09.813 Supervision of pregnancy resulting from assisted reproductive technology, third trimester
- O09.819 Supervision of pregnancy resulting from assisted reproductive technology, unspecified trimester
- O09.821 Supervision of pregnancy with history of in utero procedure during previous pregnancy, first trimester
- O09.822 Supervision of pregnancy with history of in utero procedure during previous pregnancy, second trimester
- O09.823 Supervision of pregnancy with history of in utero procedure during previous pregnancy, third trimester
- O09.829 Supervision of pregnancy with history of in utero procedure during previous pregnancy, unspecified trimester
- O09.891 Supervision of other high risk pregnancies, first trimester
- O09.892 Supervision of other high risk pregnancies, second trimester
- O09.893 Supervision of other high risk pregnancies, third trimester
- O09.899 Supervision of other high risk pregnancies, unspecified trimester
- O09.90 Supervision of high risk pregnancy, unspecified, unspecified trimester
- O09.91 Supervision of high risk pregnancy, unspecified, first trimester
- O09.92 Supervision of high risk pregnancy, unspecified, second trimester
- O09.93 Supervision of high risk pregnancy, unspecified, third trimester
- O09.A0 Supervision of pregnancy with history of molar pregnancy, unspecified trimester
- O09.A1 Supervision of pregnancy with history of molar pregnancy, first trimester
- O09.A2 Supervision of pregnancy with history of molar pregnancy, second trimester
- O09.A3 Supervision of pregnancy with history of molar pregnancy, third trimester
O10 Pre-existing hypertension complicating pregnancy, childbirth and the puerperium6 codes
- O10.02 Pre-existing essential hypertension complicating childbirth
- O10.12 Pre-existing hypertensive heart disease complicating childbirth
- O10.22 Pre-existing hypertensive chronic kidney disease complicating childbirth
- O10.32 Pre-existing hypertensive heart and chronic kidney disease complicating childbirth
- O10.42 Pre-existing secondary hypertension complicating childbirth
- O10.92 Unspecified pre-existing hypertension complicating childbirth
O11 Pre-existing hypertension with pre-eclampsia1 code
- O11.4 Pre-existing hypertension with pre-eclampsia, complicating childbirth
O12 Gestational [pregnancy-induced] edema and proteinuria without hypertension3 codes
O13 Gestational [pregnancy-induced] hypertension without significant proteinuria1 code
- O13.4 Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating childbirth
O14 Pre-eclampsia4 codes
O16 Unspecified maternal hypertension1 code
- O16.4 Unspecified maternal hypertension, complicating childbirth
O24 Diabetes mellitus in pregnancy, childbirth, and the puerperium9 codes
- O24.02 Pre-existing type 1 diabetes mellitus, in childbirth
- O24.12 Pre-existing type 2 diabetes mellitus, in childbirth
- O24.32 Unspecified pre-existing diabetes mellitus in childbirth
- O24.420 Gestational diabetes mellitus in childbirth, diet controlled
- O24.424 Gestational diabetes mellitus in childbirth, insulin controlled
- O24.425 Gestational diabetes mellitus in childbirth, controlled by oral hypoglycemic drugs
- O24.429 Gestational diabetes mellitus in childbirth, unspecified control
- O24.82 Other pre-existing diabetes mellitus in childbirth
- O24.92 Unspecified diabetes mellitus in childbirth
O25 Malnutrition in pregnancy, childbirth and the puerperium1 code
- O25.2 Malnutrition in childbirth
O26 Maternal care for other conditions predominantly related to pregnancy2 codes
O60 Preterm labor49 codes
- O60.10X0 Preterm labor with preterm delivery, unspecified trimester, not applicable or unspecified
- O60.10X1 Preterm labor with preterm delivery, unspecified trimester, fetus 1
- O60.10X2 Preterm labor with preterm delivery, unspecified trimester, fetus 2
- O60.10X3 Preterm labor with preterm delivery, unspecified trimester, fetus 3
- O60.10X4 Preterm labor with preterm delivery, unspecified trimester, fetus 4
- O60.10X5 Preterm labor with preterm delivery, unspecified trimester, fetus 5
- O60.10X9 Preterm labor with preterm delivery, unspecified trimester, other fetus
- O60.12X0 Preterm labor second trimester with preterm delivery second trimester, not applicable or unspecified
- O60.12X1 Preterm labor second trimester with preterm delivery second trimester, fetus 1
- O60.12X2 Preterm labor second trimester with preterm delivery second trimester, fetus 2
- O60.12X3 Preterm labor second trimester with preterm delivery second trimester, fetus 3
- O60.12X4 Preterm labor second trimester with preterm delivery second trimester, fetus 4
- O60.12X5 Preterm labor second trimester with preterm delivery second trimester, fetus 5
- O60.12X9 Preterm labor second trimester with preterm delivery second trimester, other fetus
- O60.13X0 Preterm labor second trimester with preterm delivery third trimester, not applicable or unspecified
- O60.13X1 Preterm labor second trimester with preterm delivery third trimester, fetus 1
- O60.13X2 Preterm labor second trimester with preterm delivery third trimester, fetus 2
- O60.13X3 Preterm labor second trimester with preterm delivery third trimester, fetus 3
- O60.13X4 Preterm labor second trimester with preterm delivery third trimester, fetus 4
- O60.13X5 Preterm labor second trimester with preterm delivery third trimester, fetus 5
- O60.13X9 Preterm labor second trimester with preterm delivery third trimester, other fetus
- O60.14X0 Preterm labor third trimester with preterm delivery third trimester, not applicable or unspecified
- O60.14X1 Preterm labor third trimester with preterm delivery third trimester, fetus 1
- O60.14X2 Preterm labor third trimester with preterm delivery third trimester, fetus 2
- O60.14X3 Preterm labor third trimester with preterm delivery third trimester, fetus 3
- O60.14X4 Preterm labor third trimester with preterm delivery third trimester, fetus 4
- O60.14X5 Preterm labor third trimester with preterm delivery third trimester, fetus 5
- O60.14X9 Preterm labor third trimester with preterm delivery third trimester, other fetus
- O60.20X0 Term delivery with preterm labor, unspecified trimester, not applicable or unspecified
- O60.20X1 Term delivery with preterm labor, unspecified trimester, fetus 1
- O60.20X2 Term delivery with preterm labor, unspecified trimester, fetus 2
- O60.20X3 Term delivery with preterm labor, unspecified trimester, fetus 3
- O60.20X4 Term delivery with preterm labor, unspecified trimester, fetus 4
- O60.20X5 Term delivery with preterm labor, unspecified trimester, fetus 5
- O60.20X9 Term delivery with preterm labor, unspecified trimester, other fetus
- O60.22X0 Term delivery with preterm labor, second trimester, not applicable or unspecified
- O60.22X1 Term delivery with preterm labor, second trimester, fetus 1
- O60.22X2 Term delivery with preterm labor, second trimester, fetus 2
- O60.22X3 Term delivery with preterm labor, second trimester, fetus 3
- O60.22X4 Term delivery with preterm labor, second trimester, fetus 4
- O60.22X5 Term delivery with preterm labor, second trimester, fetus 5
- O60.22X9 Term delivery with preterm labor, second trimester, other fetus
- O60.23X0 Term delivery with preterm labor, third trimester, not applicable or unspecified
- O60.23X1 Term delivery with preterm labor, third trimester, fetus 1
- O60.23X2 Term delivery with preterm labor, third trimester, fetus 2
- O60.23X3 Term delivery with preterm labor, third trimester, fetus 3
- O60.23X4 Term delivery with preterm labor, third trimester, fetus 4
- O60.23X5 Term delivery with preterm labor, third trimester, fetus 5
- O60.23X9 Term delivery with preterm labor, third trimester, other fetus
O63 Long labor1 code
- O63.2 Delayed delivery of second twin, triplet, etc.
O66 Other obstructed labor1 code
- O66.41 Failed attempted vaginal birth after previous cesarean delivery
O67 Labor and delivery complicated by intrapartum hemorrhage, not elsewhere classified3 codes
O68 Labor and delivery complicated by abnormality of fetal acid-base balance1 code
- O68 Labor and delivery complicated by abnormality of fetal acid-base balance
O69 Labor and delivery complicated by umbilical cord complications70 codes
- O69.0XX0 Labor and delivery complicated by prolapse of cord, not applicable or unspecified
- O69.0XX1 Labor and delivery complicated by prolapse of cord, fetus 1
- O69.0XX2 Labor and delivery complicated by prolapse of cord, fetus 2
- O69.0XX3 Labor and delivery complicated by prolapse of cord, fetus 3
- O69.0XX4 Labor and delivery complicated by prolapse of cord, fetus 4
- O69.0XX5 Labor and delivery complicated by prolapse of cord, fetus 5
- O69.0XX9 Labor and delivery complicated by prolapse of cord, other fetus
- O69.1XX0 Labor and delivery complicated by cord around neck, with compression, not applicable or unspecified
- O69.1XX1 Labor and delivery complicated by cord around neck, with compression, fetus 1
- O69.1XX2 Labor and delivery complicated by cord around neck, with compression, fetus 2
- O69.1XX3 Labor and delivery complicated by cord around neck, with compression, fetus 3
- O69.1XX4 Labor and delivery complicated by cord around neck, with compression, fetus 4
- O69.1XX5 Labor and delivery complicated by cord around neck, with compression, fetus 5
- O69.1XX9 Labor and delivery complicated by cord around neck, with compression, other fetus
- O69.2XX0 Labor and delivery complicated by other cord entanglement, with compression, not applicable or unspecified
- O69.2XX1 Labor and delivery complicated by other cord entanglement, with compression, fetus 1
- O69.2XX2 Labor and delivery complicated by other cord entanglement, with compression, fetus 2
- O69.2XX3 Labor and delivery complicated by other cord entanglement, with compression, fetus 3
- O69.2XX4 Labor and delivery complicated by other cord entanglement, with compression, fetus 4
- O69.2XX5 Labor and delivery complicated by other cord entanglement, with compression, fetus 5
- O69.2XX9 Labor and delivery complicated by other cord entanglement, with compression, other fetus
- O69.3XX0 Labor and delivery complicated by short cord, not applicable or unspecified
- O69.3XX1 Labor and delivery complicated by short cord, fetus 1
- O69.3XX2 Labor and delivery complicated by short cord, fetus 2
- O69.3XX3 Labor and delivery complicated by short cord, fetus 3
- O69.3XX4 Labor and delivery complicated by short cord, fetus 4
- O69.3XX5 Labor and delivery complicated by short cord, fetus 5
- O69.3XX9 Labor and delivery complicated by short cord, other fetus
- O69.4XX0 Labor and delivery complicated by vasa previa, not applicable or unspecified
- O69.4XX1 Labor and delivery complicated by vasa previa, fetus 1
- O69.4XX2 Labor and delivery complicated by vasa previa, fetus 2
- O69.4XX3 Labor and delivery complicated by vasa previa, fetus 3
- O69.4XX4 Labor and delivery complicated by vasa previa, fetus 4
- O69.4XX5 Labor and delivery complicated by vasa previa, fetus 5
- O69.4XX9 Labor and delivery complicated by vasa previa, other fetus
- O69.5XX0 Labor and delivery complicated by vascular lesion of cord, not applicable or unspecified
- O69.5XX1 Labor and delivery complicated by vascular lesion of cord, fetus 1
- O69.5XX2 Labor and delivery complicated by vascular lesion of cord, fetus 2
- O69.5XX3 Labor and delivery complicated by vascular lesion of cord, fetus 3
- O69.5XX4 Labor and delivery complicated by vascular lesion of cord, fetus 4
- O69.5XX5 Labor and delivery complicated by vascular lesion of cord, fetus 5
- O69.5XX9 Labor and delivery complicated by vascular lesion of cord, other fetus
- O69.81X0 Labor and delivery complicated by cord around neck, without compression, not applicable or unspecified
- O69.81X1 Labor and delivery complicated by cord around neck, without compression, fetus 1
- O69.81X2 Labor and delivery complicated by cord around neck, without compression, fetus 2
- O69.81X3 Labor and delivery complicated by cord around neck, without compression, fetus 3
- O69.81X4 Labor and delivery complicated by cord around neck, without compression, fetus 4
- O69.81X5 Labor and delivery complicated by cord around neck, without compression, fetus 5
- O69.81X9 Labor and delivery complicated by cord around neck, without compression, other fetus
- O69.82X0 Labor and delivery complicated by other cord entanglement, without compression, not applicable or unspecified
- O69.82X1 Labor and delivery complicated by other cord entanglement, without compression, fetus 1
- O69.82X2 Labor and delivery complicated by other cord entanglement, without compression, fetus 2
- O69.82X3 Labor and delivery complicated by other cord entanglement, without compression, fetus 3
- O69.82X4 Labor and delivery complicated by other cord entanglement, without compression, fetus 4
- O69.82X5 Labor and delivery complicated by other cord entanglement, without compression, fetus 5
- O69.82X9 Labor and delivery complicated by other cord entanglement, without compression, other fetus
- O69.89X0 Labor and delivery complicated by other cord complications, not applicable or unspecified
- O69.89X1 Labor and delivery complicated by other cord complications, fetus 1
- O69.89X2 Labor and delivery complicated by other cord complications, fetus 2
- O69.89X3 Labor and delivery complicated by other cord complications, fetus 3
- O69.89X4 Labor and delivery complicated by other cord complications, fetus 4
- O69.89X5 Labor and delivery complicated by other cord complications, fetus 5
- O69.89X9 Labor and delivery complicated by other cord complications, other fetus
- O69.9XX0 Labor and delivery complicated by cord complication, unspecified, not applicable or unspecified
- O69.9XX1 Labor and delivery complicated by cord complication, unspecified, fetus 1
- O69.9XX2 Labor and delivery complicated by cord complication, unspecified, fetus 2
- O69.9XX3 Labor and delivery complicated by cord complication, unspecified, fetus 3
- O69.9XX4 Labor and delivery complicated by cord complication, unspecified, fetus 4
- O69.9XX5 Labor and delivery complicated by cord complication, unspecified, fetus 5
- O69.9XX9 Labor and delivery complicated by cord complication, unspecified, other fetus
O74 Complications of anesthesia during labor and delivery10 codes
- O74.0 Aspiration pneumonitis due to anesthesia during labor and delivery
- O74.1 Other pulmonary complications of anesthesia during labor and delivery
- O74.2 Cardiac complications of anesthesia during labor and delivery
- O74.3 Central nervous system complications of anesthesia during labor and delivery
- O74.4 Toxic reaction to local anesthesia during labor and delivery
- O74.5 Spinal and epidural anesthesia-induced headache during labor and delivery
- O74.6 Other complications of spinal and epidural anesthesia during labor and delivery
- O74.7 Failed or difficult intubation for anesthesia during labor and delivery
- O74.8 Other complications of anesthesia during labor and delivery
- O74.9 Complication of anesthesia during labor and delivery, unspecified
O75 Other complications of labor and delivery, not elsewhere classified7 codes
- O75.0 Maternal distress during labor and delivery
- O75.1 Shock during or following labor and delivery
- O75.5 Delayed delivery after artificial rupture of membranes
- O75.81 Maternal exhaustion complicating labor and delivery
- O75.82 Onset (spontaneous) of labor after 37 completed weeks of gestation but before 39 completed weeks gestation, with delivery by (planned) cesarean section
- O75.89 Other specified complications of labor and delivery
- O75.9 Complication of labor and delivery, unspecified
O76 Abnormality in fetal heart rate and rhythm complicating labor and delivery1 code
- O76 Abnormality in fetal heart rate and rhythm complicating labor and delivery
O77 Other fetal stress complicating labor and delivery4 codes
O80 Encounter for full-term uncomplicated delivery1 code
- O80 Encounter for full-term uncomplicated delivery
O82 Encounter for cesarean delivery without indication1 code
- O82 Encounter for cesarean delivery without indication
O88 Obstetric embolism5 codes
O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium10 codes
- O98.02 Tuberculosis complicating childbirth
- O98.12 Syphilis complicating childbirth
- O98.22 Gonorrhea complicating childbirth
- O98.32 Other infections with a predominantly sexual mode of transmission complicating childbirth
- O98.42 Viral hepatitis complicating childbirth
- O98.52 Other viral diseases complicating childbirth
- O98.62 Protozoal diseases complicating childbirth
- O98.72 Human immunodeficiency virus [HIV] disease complicating childbirth
- O98.82 Other maternal infectious and parasitic diseases complicating childbirth
- O98.92 Unspecified maternal infectious and parasitic disease complicating childbirth
O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium18 codes
- O99.02 Anemia complicating childbirth
- O99.12 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating childbirth
- O99.214 Obesity complicating childbirth
- O99.284 Endocrine, nutritional and metabolic diseases complicating childbirth
- O99.314 Alcohol use complicating childbirth
- O99.324 Drug use complicating childbirth
- O99.334 Smoking (tobacco) complicating childbirth
- O99.344 Other mental disorders complicating childbirth
- O99.354 Diseases of the nervous system complicating childbirth
- O99.42 Diseases of the circulatory system complicating childbirth
- O99.52 Diseases of the respiratory system complicating childbirth
- O99.62 Diseases of the digestive system complicating childbirth
- O99.72 Diseases of the skin and subcutaneous tissue complicating childbirth
- O99.814 Abnormal glucose complicating childbirth
- O99.824 Streptococcus B carrier state complicating childbirth
- O99.834 Other infection carrier state complicating childbirth
- O99.844 Bariatric surgery status complicating childbirth
- O99.892 Other specified diseases and conditions complicating childbirth
O9A Maternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium5 codes
ICD-10-PCS
Procedure Codes
Procedure codes do not drive assignment for this DRG.
Frequently Asked Questions
What is MS-DRG 998?
MS-DRG 998 (Principal Diagnosis Invalid as Discharge Diagnosis) is a medicare severity DRG in Ungrouped (Other).
Source: CMS ICD-10 MS-DRG v43.0 Definitions Manual and the FY 2026 IPPS Final Rule (Table 5), effective October 1, 2025 through September 30, 2026. We publish the DRG assignments as CMS defines them and add the navigation, search, and code links.
