ModifiedBluecross IdahoPolicy MP 1.01.02

Automated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood Pressure

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Coverage of one-time, 24-hour automated ambulatory blood pressure monitoring for adults and pediatric patients with elevated office blood pressure when used to distinguish white coat hypertension from true hypertension.

Policy Summary

PayerBluecross Idaho

PolicyAutomated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood Pressure

Policy CodePolicy N/A

Change TypeModified

Effective DateNov 1, 20265d

Last ReviewJul 30, 2026

Next Review DateN/A

Key ActionDocument the patient's age, office blood pressure measurements, applicable blood pressure threshold, clinical purpose, and that immediate antihypertensive treatment is not required.

SourceLink

POLICY UPDATE CHANGES

The benefit application policy statement was updated.

Coverage criteria were clarified based on patient age.

1 timeMaximum covered monitoring use

24 hoursMonitoring period

≥130/80 and <160/100Covered adult office BP range

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ModifiedBluecross IdahoPolicy MP 1.01.02

Automated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood Pressure

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Policy Summary

PayerBluecross Idaho

PolicyAutomated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood Pressure

Policy CodePolicy N/A

Change TypeModified

Effective DateNov 1, 20265d

Last ReviewJul 30, 2026

Next Review DateN/A

Key ActionDocument the patient's age, office blood pressure measurements, applicable blood pressure threshold, clinical purpose, and that immediate antihypertensive treatment is not required.

SourceLink

POLICY UPDATE CHANGES

The benefit application policy statement was updated.

Coverage criteria were clarified based on patient age.

1 timeMaximum covered monitoring use

24 hoursMonitoring period

≥130/80 and <160/100Covered adult office BP range

Pediatric population

Coverage Criteria

Covered indication

Covered when all applicable criteria are met.

Covered indication: Automated ambulatory blood pressure monitoring is performed over a 24-hour period one time for an individual with elevated office blood pressure to differentiate white coat hypertension from true hypertension.1 time; 24-hour period

Patients aged 13 years and older

For individuals aged 13 years and older, all of the following must be met.

Office BP threshold: The patient is aged 13 years or older, and office blood pressure elevation is systolic blood pressure at least 130 mm Hg or diastolic blood pressure at least 80 mm Hg and below 160/100 mm Hg.SBP ≥130 or DBP ≥80 mm Hg AND <160/100 mm Hg
No immediate treatment requirement: The clinical presentation does not require immediate initiation of antihypertensive medication based on the severity of blood pressure elevation or acute hypertensive end-organ injury.

Patients younger than 13 years

For individuals younger than 13 years, all of the following must be met.

Pediatric office BP threshold: The patient is younger than 13 years, and office blood pressure is at or above the lower of: the 95th percentile or greater based on gender, age, and height using the American Academy of Pediatrics 2017 normative pediatric blood pressure tables, or the adult cutoff.At or above the applicable pediatric 95th percentile or adult cutoff
No immediate treatment requirement: The clinical presentation does not require immediate initiation of antihypertensive medication based on the severity of blood pressure elevation or acute hypertensive end-organ injury.

Elevated office blood pressure

The evidence is sufficient to determine that 24-hour automated ABPM improves the net health outcome for individuals with elevated office blood pressure.

Use of automated ABPM for elevated office blood pressure: The individual has elevated office blood pressure and receives 24-hour automated ambulatory blood pressure monitoring to improve diagnostic accuracy and avoid unnecessary treatment associated with white coat hypertension.24-hour automated ABPM

Compared with office or home blood pressure measurements, 24-hour ABPM has higher sensitivity, specificity, and predictive value for diagnosing hypertension.

Suspected white coat hypertension

Medicare supplemental coverage criteria for suspected white coat hypertension. ABPM is reasonable and necessary for diagnosis when all of the following are met.

Office measurements: Average office systolic blood pressure is greater than 130 mm Hg but less than 160 mm Hg, or average office diastolic blood pressure is greater than 80 mm Hg but less than 100 mm Hg.>130 and <160 mm Hg systolic, or >80 and <100 mm Hg diastolic
Repeated visits and measurements: The office blood pressure findings occur on two separate clinic or office visits, with at least two separate measurements made at each visit.2 visits; at least 2 measurements per visit
Outside-office measurements: At least two blood pressure measurements taken outside the office are below 130/80 mm Hg.<130/80 mm Hg

Suspected masked hypertension

Medicare supplemental coverage criteria for suspected masked hypertension. ABPM is reasonable and necessary for diagnosis when all of the following are met.

Office measurements: Average office systolic blood pressure is between 120 mm Hg and 129 mm Hg, or average office diastolic blood pressure is between 75 mm Hg and 79 mm Hg.120–129 mm Hg systolic, or 75–79 mm Hg diastolic
Repeated visits and measurements: The office blood pressure findings occur on two separate clinic or office visits, with at least two separate measurements made at each visit.2 visits; at least 2 measurements per visit
Outside-office measurements: At least two blood pressure measurements taken outside the office are at least 130/80 mm Hg.≥130/80 mm Hg

NICE supplemental confirmation criteria

NICE supplemental diagnostic approach for confirming hypertension with ABPM.

Confirming hypertension with ABPM: When clinic blood pressure is between 140/90 mmHg and 180/120 mmHg, offer ABPM to confirm hypertension. During usual waking hours, obtain at least 2 measurements per hour and use the average of at least 14 measurements taken during usual waking hours. Confirm hypertension when clinic blood pressure is at least 140/90 mmHg and the ABPM daytime average is at least 135/85 mmHg.Clinic BP 140/90–180/120 mmHg; at least 2 measurements per hour; at least 14 daytime measurements; daytime average ≥135/85 mmHg

If ABPM is unsuitable or not tolerated, NICE recommends home blood pressure monitoring as an alternative.

Repeated ambulatory blood pressure monitoring in individuals with persistently elevated office blood pressure is considered investigational.

Using ambulatory blood pressure monitoring to monitor treatment effectiveness is considered investigational.

All other uses of ambulatory blood pressure monitoring for individuals with elevated office blood pressure are considered investigational.

Coding and Clinical Thresholds

FDA Product Codemixed

DXN	FDA product code for ambulatory blood pressure monitors

CPTCPT

93784	Ambulatory blood pressure monitoring, utilizing report-generating software, automated, worn continuously for 24 hours or longer; including recording, scanning analysis, interpretation, and report.
93786	Recording only
93788	Scanning analysis with report
93790	Physician review with interpretation and report
99473	Self-measured blood pressure using a device validated for clinical accuracy; patient education/training and device calibration; separate self-measurements of two readings one minute apart, twice daily over a 30-day period (minimum of 12 readings), collection of data reported by the patient and/or caregiver to the physician or other qualified health care professional, with report of average systolic and diastolic pressures and subsequent communication of a treatment plan to the patient

HCPCSHCPCS

A4670

Automatic blood pressure monitor.

ICD-10ICD-10

I10	Essential (primary) hypertension (includes high blood pressure).
I11.0-I11.9	Hypertensive heart disease code range.
R03.0	Abnormal blood-pressure reading, without diagnosis of hypertension.
Z01.30-Z01.31	Encounter for examination of blood pressure code range.

Office Blood Pressure Threshold

AgePatients aged 13 years and older

Systolic or diastolic thresholdSBP ≥130 mm Hg or DBP ≥80 mm Hg

Upper limitBelow 160/100 mm Hg

Pediatric Office Blood Pressure Threshold

AgePatients younger than 13 years

Pediatric thresholdAt or above the 95th percentile or greater based on gender, age, and height using the American Academy of Pediatrics 2017 normative pediatric BP tables

Provider Documentation and Denial Risks

Documentation Required

Document clinical eligibility

Document the patient’s age, office blood pressure measurements, the applicable adult or pediatric blood pressure threshold, the clinical purpose of testing to differentiate white coat hypertension from true hypertension, and that immediate antihypertensive treatment is not required because of severe elevation or acute hypertensive end-organ injury.

Documentation Required

Document pediatric monitoring standards

For pediatric patients, document use of a pediatric-appropriate device and cuff size and application of gender- and height-specific normative blood pressure data.

Documentation Required

Meet ABPM device and interpretation requirements

Use an ABPM device capable of producing standardized 24-hour blood pressure plots with daytime and nighttime windows and normal blood pressure bands demarcated. Provide oral and written instructions, perform a test run in the physician’s office, and ensure results are interpreted by the treating physician or treating non-physician practitioner.

Clinical Background

Automated ambulatory blood pressure monitoring (ABPM) typically records blood pressure over a 24-hour period, providing repeated measurements during both daytime and nighttime. This broader measurement profile can help distinguish elevated office blood pressure from out-of-office readings.

Definitions

White Coat Hypertension

Office findingElevated blood pressure in the physician's office

Outside-office findingNormal blood pressure readings outside the physician's office

Clinical patternOffice elevation is not sustained outside the office

Masked Hypertension

Office findingNormal blood pressure readings in the office

Outside-office findingElevated blood pressure readings outside the office

Clinical patternHypertension is present outside the office but not detected by office measurement

Policy Summary

PayerBluecross Idaho

PolicyAutomated Ambulatory Blood Pressure Monitoring for Diagnosis of Hypertension in Patients with Elevated Office Blood Pressure

Policy CodePolicy N/A

Change TypeModified

Effective DateNov 1, 20265d

Last ReviewJul 30, 2026

Next Review DateN/A

Key ActionDocument the patient's age, office blood pressure measurements, applicable blood pressure threshold, clinical purpose, and that immediate antihypertensive treatment is not required.

SourceLink

On This Page

Alternative thresholdThe lower of the applicable pediatric 95th-percentile threshold or the adult cutoff

Normal Pediatric Ambulatory Blood Pressure

24-hour ambulatory BPBelow the 95th percentile or applicable adolescent cut point

Wake ambulatory BPBelow the 95th percentile or applicable adolescent cut point

Sleep ambulatory BPBelow the 95th percentile or applicable adolescent cut point

Normal Ambulatory Blood Pressure, Age 13 Years and Older

24-hour average<125/75 mm Hg

Awake average<130/80 mm Hg

Asleep average<110/65 mm Hg

White Coat Hypertension Classification

Pediatric classificationClinic BP ≥95th percentile with ambulatory values below hypertension thresholds

Age 13 years and older classificationClinic BP ≥130/80 mm Hg with ambulatory values below hypertension thresholds

Ambulatory findingOut-of-office values remain below the applicable hypertension threshold

Ambulatory Hypertension Classification

Pediatric classificationAmbulatory BP ≥95th percentile or applicable adolescent cut point

24-hour threshold, age 13 years and older≥125/75 mm Hg over 24 hours

Awake or asleep threshold, age 13 years and older≥130/80 mm Hg while awake or ≥110/65 mm Hg while asleep

24-Hour Average ABPM

Normotension≤130/80 mm Hg

Hypertension>135/85 mm Hg

95th percentile132/82 mm Hg

Daytime Average ABPM

Normotension≤135/85 mm Hg

Hypertension>140/90 mm Hg

95th percentile138/87 mm Hg

Nighttime Average ABPM

Normotension≤120/70 mm Hg

Hypertension>125/75 mm Hg

95th percentile123/74 mm Hg

NICE Clinic Blood Pressure Range

Lower clinic BP range140/90 mmHg

Upper clinic BP range180/120 mmHg

NICE actionOffer ABPM when clinic blood pressure is between 140/90 mmHg and 180/120 mmHg

NICE Daytime ABPM Frequency

Measurement frequencyAt least 2 measurements per hour

Measurement periodDuring usual waking hours

PurposeUse ABPM to confirm a diagnosis of hypertension

NICE Minimum Daytime Measurements

Minimum numberAt least 14 measurements

Averaging periodUsual waking hours

UseAverage the measurements to confirm a diagnosis of hypertension

NICE Confirmation Threshold

Clinic BP requirementAt least 140/90 mmHg

ABPM daytime averageAt least 135/85 mmHg

AlternativeHBPM average of at least 135/85 mmHg

Medicare Suspected White Coat Hypertension

Office systolic BP>130 mmHg and <160 mmHg

Office diastolic BP>80 mmHg and <100 mmHg

Office measurement patternAverage office BP on two separate clinic or office visits, with at least two measurements at each visit

Medicare Suspected Masked Hypertension

Office systolic BP120–129 mmHg

Office diastolic BP75–79 mmHg

Office measurement patternAverage office BP on two separate clinic or office visits, with at least two measurements at each visit

Medicare Outside-Office Thresholds

White coat hypertensionAt least two outside-office measurements <130/80 mmHg

Masked hypertensionAt least two outside-office measurements ≥130/80 mmHg

Measurement requirementOutside-office readings are required in addition to the specified office measurements

Denial Risk

Avoid noncovered or repeat testing

Coverage is not supported when ABPM is used for purposes other than the covered one-time evaluation of elevated office blood pressure to differentiate white coat hypertension from true hypertension.

Repeated testing in individuals with persistently elevated office blood pressure is investigational.
Monitoring treatment effectiveness is investigational.
All other uses for individuals with elevated office blood pressure are considered investigational.

Denial Risk

Do not use ABPM when immediate treatment is required

The service may be denied when the patient requires immediate initiation of antihypertensive medication because of the severity of blood pressure elevation or acute hypertensive end-organ injury.

Denial Risk

Verify the covered office BP range

For patients aged 13 years and older, coverage is not supported unless office systolic blood pressure is at least 130 mm Hg or diastolic blood pressure is at least 80 mm Hg and the elevation is below 160/100 mm Hg.

Covered range: SBP ≥130 or DBP ≥80 mm Hg and <160/100 mm Hg.

Automated Ambulatory Blood Pressure Monitoring

AutomationFully automated blood pressure monitoring

Monitoring periodGenerally performed over a 24-hour period

Measurement timingReadings are obtained at multiple times during the daytime and nighttime

Clinically Valid

Condition detectionDetects the presence or absence of a condition

Future riskDetects the risk of developing a condition in the future

Treatment responseDetects beneficial or adverse treatment response

Clinically Useful

Management impactResults inform management decisions

Net health outcomeManagement decisions improve the net health outcome of care

Potential benefitPatients receive correct or more effective therapy or avoid unnecessary therapy or testing

White Coat Hypertension (WCH)

Office findingElevated office blood pressure

Ambulatory findingNonsustained or normal ambulatory blood pressure findings

MeaningThe elevated office pressure is not sustained on ambulatory monitoring

ABPM

SettingPerformed outside the clinical setting

Monitoring periodGenerally performed over a 24-hour period

Device and readingsUses an automated device to record daytime and nighttime blood pressure measurements

White Coat Hypertension

Core definitionOffice blood pressure is elevated but blood pressure measured outside the office is normal

Medicare office rangeAverage office SBP >130 and <160 mmHg or DBP >80 and <100 mmHg

Medicare outside-office findingAt least two outside-office measurements are below 130/80 mmHg

Masked Hypertension

Core definitionHypertension is not detected by office blood pressure measurement but is present outside the office

Medicare office rangeAverage untreated office SBP 120–129 mmHg or DBP 75–79 mmHg

Medicare outside-office findingAt least two outside-office measurements are at least 130/80 mmHg

HBPM

AbbreviationHBPM

MeaningHome blood pressure monitoring

Measurement settingBlood pressure monitoring performed at home rather than in the clinical setting