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v1.0.0
ICD-10 Guide
DiagnosesAdvanced Maternal Age Pregnancy

Advanced Maternal Age Pregnancy

ICD-10 Coding for Advanced Maternal Age Pregnancy(O09.51, Z35.51)

PRIMARY SPECIALTYObstetrics
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Advanced Maternal Age Pregnancy?
Essential facts and insights about Advanced Maternal Age Pregnancy

Key Clinical Considerations:

  • Advanced maternal age is defined as being 35 years or older at the time of delivery.
  • Common signs and symptoms may include increased risk of gestational diabetes, hypertension, and chromosomal abnormalities.
  • Laboratory findings may include abnormal glucose tolerance tests or elevated blood pressure readings.
  • Physical examination findings may reveal signs of preeclampsia or other pregnancy-related complications.
  • Severity criteria may include the presence of comorbid conditions such as obesity or pre-existing hypertension.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must clearly indicate the patient's age at the time of delivery and any associated risks.
  • Specific terminology such as 'advanced maternal age' or 'AMA' must be documented in the patient's chart.
  • Examples include noting the patient's age, any complications, and the management plan.
  • Documentation must support medical necessity for any additional monitoring or interventions.
  • Quality measures may include tracking outcomes related to maternal and fetal health in advanced maternal age pregnancies.

Coding Guidelines

Usage Guidelines & Examples

  • Use O09.51 for pregnancies with advanced maternal age when the patient is 35 years or older.
  • Do not use this code for patients under 35 or for unrelated pregnancy complications.
  • Related codes include O09.52 for advanced maternal age with complications and Z35.51 for supervision of high-risk pregnancy.
  • Common errors include misclassifying age-related risks or failing to document the patient's age.
  • In complex cases, consider additional codes for specific complications or conditions.

Code Exclusions

Important Exclusions

  • Excludes pregnancies in women under 35 years of age.
  • Alternative codes for excluded conditions include O09.52 for complications related to advanced maternal age.
  • Conditions are excluded to ensure accurate representation of risks associated with advanced maternal age.
  • Common mistakes include coding advanced maternal age without documenting the patient's age or related complications.
  • Related but distinct conditions may include advanced paternal age or other maternal health issues.

Related ICD-10 Codes

Primary Codes
O09.51
Supervision of high-risk pregnancy due to advanced maternal age
Z35.51
Supervision of high-risk pregnancy due to advanced maternal age
Ancillary Codes
Z3A.01
Differential Codes
Z35.51
Z35.51
when AMA is the sole reason for increased monitoring without complications.
O09.51
O09.51
when AMA directly impacts care, such as requiring fetal monitoring.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Obstetrics

Specialty Applications

  • Applies to pregnancies in women aged 35 and older.
  • Patient populations include those with increased risk factors such as obesity or pre-existing health conditions.
  • Clinical settings include both outpatient prenatal care and inpatient obstetric care.
  • Specialty-specific applications are relevant in obstetrics and maternal-fetal medicine.
  • Treatment contexts may involve increased monitoring, genetic counseling, and specialized care plans.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with advanced maternal age based on age of 36 years at delivery.'

Template 2

Template: 'Clinical presentation consistent with advanced maternal age including increased risk for gestational diabetes.'

Template 3

Template: 'Diagnostic criteria for advanced maternal age met as evidenced by patient age and associated risks.'

Template 4

Template: 'Treatment plan initiated for advanced maternal age with increased monitoring and genetic counseling.'

Template 5

Template: 'Follow-up care for advanced maternal age including regular assessments of maternal and fetal health.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Documentation must include the patient's age, any complications, and the management plan.

How does this differ from similar diagnoses?

Advanced maternal age is specifically defined by age, while other diagnoses may focus on different risk factors.

What are common billing considerations?

Ensure that documentation supports the medical necessity for any additional monitoring or interventions.

What procedures are typically associated?

Related CPT codes may include genetic testing, ultrasounds, and additional monitoring procedures.

Are there any quality reporting implications?

Quality measures may include tracking maternal and fetal outcomes in advanced maternal age pregnancies.