Icd 9 code for pregnancy dating

Icd 9 code for pregnancy dating


In the absence of information on the beginning or the duration of pregnancy, several methods have been used to estimate them in automated databases. When there is no dating ultrasound, the gestational age at birth is assigned based on the self-reported date of last menstrual period. If neither of the two sources is considered reliable, the gestational ages at birth as reported by the caregiver in the birth form and by physical examination at birth are considered. All pregnancies were assigned a fixed duration of 40 weeks, which is the median duration of human gestation 19 hereafter, Conventional method - 40 weeks. We classified births as preterm in the presence of a claim for: We assessed the accuracy of the algorithm-based estimates relative to the gold standard of the clinical gestational age at birth recorded in the delivery discharge record. Other health services were coded in a fee-for-service coding system. Abstract Purpose The role of administrative databases for research on drug safety during pregnancy can be limited by their inaccurate assessment of the timing of exposure, as the gestational age at birth is typically unavailable. On the other hand, they have an important limitation: Modification to the conventional method: This is the gestational age used in prenatal care and serves as the gold standard in our evaluation of alternative estimates of the gestational age at birth. Pregnancies with invalid gestational age at birth in the hospital discharge record i. Some studies excluded suspected short gestations from the study population, 5 , 6 but this method is limited to the evaluation of outcomes unrelated to short gestation. If the difference is larger, the gestational age at birth is based on the ultrasound. Because of the limitations of these methods, we set out to develop and validate algorithms to estimate the beginning of pregnancy employing information that can be extracted from automated databases. The publisher's final edited version of this article is available at Pharmacoepidemiol Drug Saf See other articles in PMC that cite the published article. Using administrative data from a population-based cohort of pregnancies linked to gestational age information from birth discharge records, we first evaluated an indicator of preterm birth. Estimation of gestational age: We kept only the first occurrence of each code per pregnancy, under the assumption that first-time tests are indicated in a timely manner while re-tests may legitimately occur after the intended gestational age window. Algorithms based on a claim-based preterm-status indicator. Last, we compared our estimates, and the conventional method of assigning all pregnancies a duration of days, to the gestational age at birth from clinical discharge records. We assigned all pregnancies a fixed duration of 39 weeks, which is the median clinical gestational age at birth in the study population hereafter, Conventional method, empirical - 39 weeks. Conventional method and empirical modification Conventional method: Algorithms based on screening-test claims. These algorithms borrowed information from the pattern of claims for routine prenatal screening tests. Often, researchers assumed a fixed duration of pregnancy of — days. This study was approved by the Brigham and Women's Hospital institutional review board and signed data use agreements were in place.

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Icd 9 code for pregnancy dating

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We classified births as preterm in the presence of a claim for: This study was approved by the Brigham and Women's Hospital institutional review board and signed data use agreements were in place. Abstract Purpose The role of administrative databases for research on drug safety during pregnancy can be limited by their inaccurate assessment of the timing of exposure, as the gestational age at birth is typically unavailable. Algorithms based on screening-test claims. We kept only the first occurrence of each code per pregnancy, under the assumption that first-time tests are indicated in a timely manner while re-tests may legitimately occur after the intended gestational age window. When there is no dating ultrasound, the gestational age at birth is assigned based on the self-reported date of last menstrual period. Modification to the conventional method: This is the gestational age used in prenatal care and serves as the gold standard in our evaluation of alternative estimates of the gestational age at birth. Other health services were coded in a fee-for-service coding system. When an early dating ultrasound is available and the due dates by self-reported date of last menstrual period and dating ultrasound are within 7 days of each other, the gestational age at birth is based on the self-reported date of last menstrual period. Estimation of gestational age at birth: Preterm status In this dataset, preterm deliveries can be identified based on the standard clinical gestational age at birth, but researchers must usually resort to surrogate sources of information such as claims. These algorithms borrowed information from the pattern of claims for routine prenatal screening tests.

Icd 9 code for pregnancy dating


In the absence of information on the beginning or the duration of pregnancy, several methods have been used to estimate them in automated databases. When there is no dating ultrasound, the gestational age at birth is assigned based on the self-reported date of last menstrual period. If neither of the two sources is considered reliable, the gestational ages at birth as reported by the caregiver in the birth form and by physical examination at birth are considered. All pregnancies were assigned a fixed duration of 40 weeks, which is the median duration of human gestation 19 hereafter, Conventional method - 40 weeks. We classified births as preterm in the presence of a claim for: We assessed the accuracy of the algorithm-based estimates relative to the gold standard of the clinical gestational age at birth recorded in the delivery discharge record. Other health services were coded in a fee-for-service coding system. Abstract Purpose The role of administrative databases for research on drug safety during pregnancy can be limited by their inaccurate assessment of the timing of exposure, as the gestational age at birth is typically unavailable. On the other hand, they have an important limitation: Modification to the conventional method: This is the gestational age used in prenatal care and serves as the gold standard in our evaluation of alternative estimates of the gestational age at birth. Pregnancies with invalid gestational age at birth in the hospital discharge record i. Some studies excluded suspected short gestations from the study population, 5 , 6 but this method is limited to the evaluation of outcomes unrelated to short gestation. If the difference is larger, the gestational age at birth is based on the ultrasound. Because of the limitations of these methods, we set out to develop and validate algorithms to estimate the beginning of pregnancy employing information that can be extracted from automated databases. The publisher's final edited version of this article is available at Pharmacoepidemiol Drug Saf See other articles in PMC that cite the published article. Using administrative data from a population-based cohort of pregnancies linked to gestational age information from birth discharge records, we first evaluated an indicator of preterm birth. Estimation of gestational age: We kept only the first occurrence of each code per pregnancy, under the assumption that first-time tests are indicated in a timely manner while re-tests may legitimately occur after the intended gestational age window. Algorithms based on a claim-based preterm-status indicator. Last, we compared our estimates, and the conventional method of assigning all pregnancies a duration of days, to the gestational age at birth from clinical discharge records. We assigned all pregnancies a fixed duration of 39 weeks, which is the median clinical gestational age at birth in the study population hereafter, Conventional method, empirical - 39 weeks. Conventional method and empirical modification Conventional method: Algorithms based on screening-test claims. These algorithms borrowed information from the pattern of claims for routine prenatal screening tests. Often, researchers assumed a fixed duration of pregnancy of — days. This study was approved by the Brigham and Women's Hospital institutional review board and signed data use agreements were in place.

Icd 9 code for pregnancy dating


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  1. Conventional method and empirical modification Conventional method: Algorithms based on screening-test claims.

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