Obstetric Ultrasound: Scheduling Guide & Exam Codes
Purpose: This guide provides accurate scheduling support for Obstetric (pregnancy) Ultrasound exams across all Washington Radiology locations. Use this resource to confirm exam type, location restrictions, patient prep, and important scheduling reminders.
Location Availability Summary:
- Bethesda
- K-Street
- Chevy Chase
- Fairfax
- Sterling
Quick Reference: Exam Types & Guidelines
| Exam Code | Exam Description | When to Use | Location(s) & Rules | Prep & Notes |
| 58 | U/S OB under 14 Weeks | Patient must be at least 5 weeks | Prep: Drink 32 oz. of water 1 hour prior to your exam and hold your bladder. | |
| 73 | Obstetric Nuchal Translucency AKA: First Trimester Screen or Ultrascreen | Determine fetus's risk of congenital conditions like Down syndrome | Not available at Chevy Chase or DC Patient must be between 11 weeks, 3 days and 13 weeks 6 days pregnant Patient will need to sign a waiver. | Prep: Drink 32 oz. of water 1 hour prior to your exam and hold your bladder. This exam includes a blood draw. |
| 61 | Obstetric Over 14 Weeks | Patient must be over 14 weeks pregnant. Confirm: Does the physician order specify timeframe for the exam to be scheduled. DC Location Notes:
| Over 16 Weeks: No prep Under 16 Weeks: Drink 32 oz. of water 1 hour prior to your exam and hold your bladder. | |
| 423 | Obstetric Over 14 Weeks | 20 Week Anatomy Scan | Patient must be over 14 weeks pregnant. Confirm: Does the physician order specify timeframe for the exam to be scheduled. DC Location Notes:
| No Prep |
| 76 | Obstetric Bio-Physical | AKA: BPP Doppler | Patient must be 28+ weeks pregnant. DC Location Notes:
| No Prep |
| 964 | Obstetric Multiple | DC Location Notes:
| No Prep |
EDITED: 07/03/2025
