O10-O16
Medium Complexity
Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
Primary Specialty: Obstetrics and Gynecology
Last Updated: 2025-09-10
ICD-10 Codes (76)
76 billable0 category headers
O11Billable
O11.1Billable
O11.2Billable
O11.3Billable
O11.4Billable
O11.5Billable
O11.9Billable
O12Billable
O12.0Billable
O12.00Billable
O12.01Billable
O12.02Billable
O12.03Billable
O12.04Billable
O12.05Billable
O12.1Billable
O12.10Billable
O12.11Billable
O12.12Billable
O12.13Billable
O12.14Billable
O12.15Billable
O12.2Billable
O12.20Billable
O12.21Billable
O12.22Billable
O12.23Billable
O12.24Billable
O12.25Billable
O13Billable
O13.1Billable
O13.2Billable
O13.3Billable
O13.4Billable
O13.5Billable
O13.9Billable
O14Billable
O14.0Billable
O14.00Billable
O14.02Billable
O14.03Billable
O14.04Billable
O14.05Billable
O14.1Billable
O14.10Billable
O14.12Billable
O14.13Billable
O14.14Billable
O14.15Billable
O14.2Billable
O14.20Billable
O14.22Billable
O14.23Billable
O14.24Billable
O14.25Billable
O14.9Billable
O14.90Billable
O14.92Billable
O14.93Billable
O14.94Billable
O14.95Billable
O15Billable
O15.0Billable
O15.00Billable
O15.02Billable
O15.03Billable
O15.1Billable
O15.2Billable
O15.9Billable
O16Billable
O16.1Billable
O16.2Billable
O16.3Billable
O16.4Billable
O16.5Billable
O16.9Billable
Updates & Changes
FY 2026 Updates
Current Year
New Codes (1)
O03.87
Complete or unspecified spontaneous abortion with embolism, complicated by delayed or excessive hemorrhage
Revised Codes (1)
O00.9
Ectopic pregnancy, unspecified - updated hCG correlation requirements
Deleted Codes
No codes deleted in this range for FY 2026
Historical Changes
- •FY 2025: Routine maintenance updates with minor terminology clarifications
- •FY 2024: Enhanced specificity requirements for certain code ranges
- •FY 2023: Updated documentation guidelines for improved clarity
Upcoming Changes
- •Proposed updates pending review by Coordination and Maintenance Committee
- •Under consideration: Enhanced digital health integration codes
Implementation Guidance
- •Review all FY 2026 updates for O10-O16 codes before implementation
- •Always verify the most current codes in the ICD-10-CM manual
- •Ensure clinical documentation supports the selected diagnosis codes
- +3 more guidance items...
Range Overview
high priority
The O10-O16 range in ICD-10 covers conditions related to edema, proteinuria, and hypertensive disorders occurring during pregnancy, childbirth, and the puerperium. These codes are used to document various hypertensive disorders such as pre-existing hypertension complicating pregnancy and gestational hypertension. They also include codes for preeclampsia and eclampsia, and for proteinuria and edema in diseases classified elsewhere.
Key Usage Points:
- •Always use a secondary code from category O99 to identify the cause of the edema or proteinuria.
- •For preeclampsia, use additional code from category O14.
- •For eclampsia, use additional code from category O15.
- •For gestational hypertension, use additional code from category O13.
- •For pre-existing hypertension, use additional code from category O10.
Coding Guidelines
When to Use:
- ✓When a patient presents with hypertension during pregnancy.
- ✓When a patient develops proteinuria or edema during pregnancy.
- ✓When a patient has a pre-existing hypertensive disorder that complicates pregnancy.
- ✓When a patient develops preeclampsia or eclampsia during pregnancy.
- ✓When a patient has gestational hypertension.
When NOT to Use:
- ✗When hypertension is not related to pregnancy.
- ✗When proteinuria or edema is not related to pregnancy.
- ✗When preeclampsia or eclampsia occurs outside of pregnancy.
- ✗When gestational hypertension occurs outside of pregnancy.
- ✗When pre-existing hypertension does not complicate pregnancy.
Code Exclusions
Always verify exclusions with the patient's medical record and the ICD-10 guidelines.
Documentation Requirements
Documentation for this range should clearly specify the type of hypertensive disorder, whether it is pre-existing or gestational, and whether it is complicated by preeclampsia or eclampsia. The presence of edema or proteinuria should also be documented.
Clinical Information:
- •Type of hypertensive disorder
- •Presence of preeclampsia or eclampsia
- •Presence of edema or proteinuria
- •Whether the hypertension is pre-existing or gestational
Supporting Evidence:
- •Laboratory results
- •Ultrasound reports
- •Physician's notes
- •Hospital admission and discharge summaries
Good Documentation Example:
Patient with pre-existing hypertension developed preeclampsia during pregnancy. Laboratory results show proteinuria.
Poor Documentation Example:
Patient has hypertension.
Common Documentation Errors:
- âš Not specifying the type of hypertensive disorder
- âš Not documenting the presence of preeclampsia or eclampsia
- âš Not documenting the presence of edema or proteinuria
- âš Not specifying whether the hypertension is pre-existing or gestational
Range Statistics
7
Total Codes
76
Billable
Complexity:
Medium
Primary Use:Clinical Documentation
Chapter:15
Coding Complexity
Medium
Complexity Rating
The complexity of this range is medium because it requires a thorough understanding of the different types of hypertensive disorders in pregnancy and their complications. It also requires careful review of the patient's medical record to accurately code the condition.
Key Factors:
- â–¸Determining whether the hypertension is pre-existing or gestational
- â–¸Identifying the presence of preeclampsia or eclampsia
- â–¸Identifying the presence of edema or proteinuria
- â–¸Determining whether the hypertensive disorder complicates pregnancy
Specialty Focus
This range is most commonly used by obstetricians and gynecologists, but may also be used by internists and family practitioners who care for pregnant patients.
Primary Specialties:
Obstetrics and Gynecology
70%
Internal Medicine
20%
Family Practice
10%
Clinical Scenarios:
- • A pregnant patient with pre-existing hypertension develops preeclampsia.
- • A pregnant patient develops gestational hypertension.
- • A pregnant patient presents with edema and proteinuria.
- • A patient develops eclampsia during childbirth.
- • A patient with pre-existing hypertension has an uncomplicated pregnancy.
Resources & References
Resources for this range include the official ICD-10 guidelines, clinical textbooks on obstetrics and gynecology, and online coding resources.
Official Guidelines:
- ICD-10-CM Official Guidelines for Coding and Reporting
- American College of Obstetricians and Gynecologists Practice Bulletin on Hypertensive Disorders in Pregnancy
- World Health Organization Guidelines for the Management of Hypertensive Disorders in Pregnancy
Clinical References:
- Williams Obstetrics, 25th Edition
- Obstetrics: Normal and Problem Pregnancies, 7th Edition
Educational Materials:
- American Health Information Management Association ICD-10 training materials
- American Academy of Professional Coders ICD-10 training materials
Frequently Asked Questions
How do I code for a patient with pre-existing hypertension who develops preeclampsia during pregnancy?
Use a code from category O10 for the pre-existing hypertension and an additional code from category O14 for the preeclampsia.