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Sex Assigned at Birth (SAB) Documentation

Published: August 9, 2026Updated: August 16, 2026

This test records the biological sex assigned to you at birth, which is a medical record detail used for administrative and clinical purposes.

Quick summary

["Your biological sex is documented for healthcare tracking and support services."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
76689-9
Short code
Sex assigned at birth
Synonyms
Sex assigned at birth
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Is This Test For?

This is not a blood, urine, or other biological sample test. Instead, it’s a record-keeping measure based on the sex assigned to you at birth, typically documented in your medical chart. It helps healthcare providers and support systems (like insurance or gender-affirming care teams) understand your baseline identity-related information.

Why Might Your Doctor Ask About This?

Your sex assigned at birth may be reviewed in specific contexts, such as gender-affirming care, reproductive health discussions, or when coordinating care with specialists who need to understand your baseline identity-related details.

How Is This Recorded?

This is a qualitative (yes/no or text-based) entry in your medical record, not a lab measurement. It’s not tied to a blood test or other specimen. Your assigned sex at birth is documented as part of your permanent medical history.

What Does This Have to Do with Lab Tests?

Unlike traditional lab tests (e.g., blood glucose, cholesterol), this is a non-biological record. It’s not a measurement of hormones, chromosomes, or other biological markers. Instead, it’s a legal and administrative identifier tied to your birth certificate or medical documentation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

SAB Status

Frequently asked questions

Will this test show my current gender identity?
No. This test records the sex assigned at birth (based on biological markers at birth, such as chromosomes or external genitalia), not your current gender identity. Gender identity is a personal sense of self and is documented separately if needed.
How long is this record kept?
Medical records like this are typically kept indefinitely, though some insurance or administrative systems may have specific retention policies. Always confirm with your healthcare provider or facility.
Can I change this record?
Yes. If your sex assigned at birth differs from your current gender identity, you can update this record with your healthcare provider or facility. This is a legal and medical process that may involve documentation from your birth certificate or other identifying records.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy