CurrentAetnaPolicy 0025

Automated Ambulatory Blood Pressure Monitoring

Defines medical necessity, experimental/investigational uses, coding guidance, and clinical background for automated ambulatory blood pressure monitoring for Aetna members.

Policy Summary

PayerAetna

PolicyAutomated Ambulatory Blood Pressure Monitoring

Policy CodePolicy 0025

Change TypeNo material changes

Effective Date

Next Review Date

Key ActionDocument at least two elevated office blood pressure readings on separate days when requesting ABPM for white coat hypertension evaluation.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

24–72hmonitoring duration

≥2office readings required

≥6 morepeat testing guidance

93784–93790CPT codes listed

7 listedexperimental uses

Coverage and Medical Necessity Criteria

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Medical Necessity Indications

Covered when ANY of the following are met

Medical necessity indications

Office BP requirement: Two elevated office BP readings on separate days

Episodic hypertension: Symptomatology suggestive of episodic hypertension (paroxysms of sweating, palpitations, apprehension) suggesting pheochromocytoma when office BP measurements are repeatedly normal.

Evaluation of hypotensive symptoms: Members with hypotensive symptoms and/or syncope thought to be related to antihypertensive medications.

Evaluation of syncope: When used in conjunction with a 24-hour Holter monitor to determine whether syncope/near-syncope symptoms are due to an arrhythmia.

See CPB 0019 Holter Monitors.

Nocturnal angina: Investigate blood pressure changes in members with nocturnal angina.

Resistant hypertension pre-invasive evaluation: ABPM is medically necessary prior to instituting invasive investigation (e.g., renin vein assays, angiogram for renal artery stenosis) for members with hypertension refractory to medications.

Examples include renin vein assays or renal angiogram.

When ABPM is useful

Situations described where ABPM is recommended or useful:

ABPM recommended to resolve diagnostic uncertainty: When office and home (HBPM) blood pressure measurements are discordant or when there is uncertainty about threshold values, 24-hour ABPM should be considered to establish the diagnosis of hypertension.

Supported by systematic review and comparisons of office/HBPM versus ABPM.

Uses of ABPM: Identification of white-coat hypertension; detection of masked hypertension; assessment of nocturnal BP patterns (dipping, non-dipping, reverse dipping, nocturnal hypertension) relevant to therapy; and evaluation prior to CPAP initiation in obstructive sleep apnea to predict BP response.

Guideline-based diagnostic superiority and utility for nocturnal pattern assessment.

Aetna considers ambulatory blood pressure monitoring (ABPM) experimental and investigational in any of the following situations because the medical literature does not support its use: (1) for blood pressure monitoring of persons with heart failure; (2) for blood pressure monitoring of pregnant women who do not meet any of the medically necessary criteria listed in this policy; (3) for diagnosing malignant (accelerated phase) hypertension, which requires urgent hospital admission and management; (4) for members with an irregular cardiac rhythm (e.g., atrial fibrillation) due to inconsistent and unreliable BP readings; (5) for monitoring normal or borderline hypertensive readings in members with documented end-organ damage or cardiovascular risk factors (for example, nephropathy, ECG changes, left ventricular hypertrophy, angina, myocardial infarction, stroke/transient ischemic attack, diabetes, smoking, hypercholesterolemia); (6) for routine monitoring to establish the clinical diagnosis of hypertension or to evaluate treatment response; and (7) for routine use prior to initiation of continuous positive airway pressure (CPAP) when the member does not meet any of the medically necessary indications for ABPM.

Automated BP devices have heterogeneous accuracy in patients with atrial fibrillation (AF). Validation studies generally exclude persons with AF, and comparisons to standard mercury sphygmomanometry show wide variation in mean systolic and diastolic differences across devices. Devices that include AF-detection algorithms are not demonstrably more accurate for BP measurement in AF than other devices; therefore individual device validation in AF populations is necessary before relying on their BP values.

This Clinical Policy Bulletin is provided to assist in administering plan benefits and contains only a partial, general description of plan or program benefits. It does not constitute a contract, does not guarantee coverage or outcomes, and is not medical advice. Providers remain solely responsible for medical treatment decisions and should verify member benefits and authorization requirements with the plan.

ABPM monitoring durations outside the supported range are not considered medically necessary: monitoring for <24 hours or for more than 3 days is not supported. Additionally, repeat ABPM is generally not considered necessary more frequently than every 6 months unless new clinical circumstances arise that would justify earlier reassessment.

Smartphone application–assisted home blood pressure monitoring (app-assisted HBPM) demonstrated high sensitivity and negative predictive value for identifying sustained and masked hypertension but showed considerable diagnostic disagreement with 24‑hour ABPM. App-assisted HBPM may be suitable as a screening tool, but it is not a replacement for ABPM when ABPM is required to establish a definitive diagnosis or to guide management decisions. When office and home BP measurements are discordant or uncertain, 24‑hour ABPM should be considered as the reference standard.

Coding and Billing

Covered CPT Codes (if selection criteria are met)CPTCovered

93784	Ambulatory blood pressure monitoring, utilizing a system such as magnetic tape and/or computer disk, 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.

Other related CPT codesCPT

36251	Selective catheter placement (first-order), main renal artery and any accessory renal artery(s) for renal angiography,including arterial puncture and catheter placement(s), fluoroscopy, contrast injections(s), image postprocessing, permanent recording of images, and radiological supervision and interpretation, including pressure gradient measurements when performed, and flush aortogram when performed; unilateral.
36252	Selective catheter placement; bilateral.
36253	Superselective catheter placement (one or more second order or higher renal artery branches), renal artery and any accessory renal artery(s) for renal angiography,including arterial puncture and catheter placement(s), fluoroscopy, contrast injections(s), image postprocessing, permanent recording of images, and radiological supervision and interpretation, including pressure gradient measurements when performed, and flush aortogram when performed; unilateral.
36254	Superselective catheter placement; bilateral.
80416	Renal vein renin stimulation panel (e.g., captopril).
80417	Peripheral vein renin stimulation panel (e.g., captopril).
84244	Renin.

ICD-10 codes covered if selection criteria are metICD-10Covered

D35.00 - D35.02	Benign neoplasm of adrenal gland.
I10	Hypertension [malignant only].
I11.9	Hypertensive heart disease without heart
I15.0 - I16.2	Secondary hypertension [malignant only].
I20.8	Other forms of angina pectoris [Angina decubitus].
I95.0 - I95.9	Hypotension.
R03.0	Elevated blood-pressure reading, without diagnosis of hypertension.
R55	Syncope and collapse.
Z13.6	Encounter for screening for cardiovascular disorders.
Z34.00 - Z34.93	Encounter for supervision of normal pregnancy.

ICD-10 codes not covered for indications listed in the CPBICD-10Not Covered

E08.00 - E13.9	Diabetes mellitus.
E78.00 - E78.01	Pure and familial hypercholesterolemia.
E78.2	Mixed hyperlipidemia.
F17.200 - F17.299	Nicotine dependence.
I09.81	Rheumatic heart failure (congestive).
I21.01 - I25.2	ST elevation (STEMI) and non-ST (NSTEMI) myocardial infarction.
I21.A1	Myocardial infarction type 2.
I21.A9	Other myocardial infarction type.
I50.1 - I50.9	Heart failure.
I51.7	Cardiomegaly.

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Office BP elevated threshold (adults)

Adult office BP elevated thresholdSystolic ≥140 mm Hg or diastolic ≥90 mm Hg (requires a minimum of two elevated office readings on separate days)

Pediatric threshold referenceGreater than the 90th percentile for age, gender, and height (see appendix/NHLBI tables)

Minimum number of office readingsAt least two elevated office blood pressure readings on separate days documented for white coat hypertension evaluation

Monitoring duration — generally at least 24 hours up to 3 days

Standard monitoring durationGenerally at least 24 hours, up to a maximum of 3 days

Not medically necessary durationMonitoring for less than 24 hours or more than 3 days is not considered medically necessary

Repeat testing frequencyRepeat ABPM is generally not necessary more frequently than every 6 months

Diagnostic BP thresholds referenced (ABPM, HBPM, Office)

24‑hour ABPM diagnostic thresholds24‑hour mean BP ≥130/80 mm Hg or mean awake BP ≥135/85 mm Hg

Home BP (HBPM) thresholdMean HBPM ≥135/85 mm Hg (used for comparison with ABPM)

Office BP thresholdsConventional office threshold commonly ≥140/90 mm Hg (used in studies comparing to ABPM)

Provider Actions, Prior Authorization, and Documentation

Billing Rule

Prior authorization / coding note

CPT codes 93784, 93786, 93788, and 93790 are covered when the selection criteria in this policy are met. Other related CPT and ICD-10 codes are listed in the coding section for reference; confirm coding and billing requirements with the member's plan prior to submission.

Covered CPTs when medically necessary: 93784, 93786, 93788, 93790
Other related CPTs/diagnostic codes listed in coding section (e.g., 36251-36254, 80416-80417, 84244) — verify applicability

Prior Authorization

Prior authorization

The excerpt does not state a specific prior authorization requirement for ambulatory blood pressure monitoring. Providers should verify benefit coverage and any plan-specific prior authorization policies with Aetna or the member's plan before scheduling services.

No explicit prior authorization process described in this CPB excerpt
Verify plan-level prior authorization and medical necessity requirements via Aetna prior to service

Note

Prior authorization note

Administrative disclaimers in the policy note that Clinical Policy Bulletins assist in plan administration but do not guarantee coverage. Providers are responsible for verifying eligibility, benefits, and any required prior authorization with the member's plan.

CPBs are informational and do not guarantee coverage
Providers must verify benefits, eligibility, and prior authorization requirements with the plan

Denial Risk

Experimental/Investigational denials

Use of ambulatory blood pressure monitoring is considered experimental and investigational (and should be denied) for the listed situations because the medical literature does not support its use in these conditions.

Not covered / investigational indications include monitoring in heart failure, pregnant women without listed indications, diagnosing malignant hypertension, members with irregular cardiac rhythm (e.g., atrial fibrillation), routine monitoring in members with end-organ damage or cardiovascular risk factors, routine monitoring to establish diagnosis or evaluate response to treatment, and routine use prior to CPAP when no other indications are present.

Note

None specified

No additional provider actions or special administrative steps are specified in this CPB excerpt beyond verification of benefits and adherence to the selection criteria and documentation requirements noted.

None specified in this document excerpt

Documentation Required

Office BP documentation

Document at least two elevated office blood pressure readings on separate days to support the diagnosis of office (white coat) hypertension prior to ABPM. For adults, elevated is typically systolic ≥140 mm Hg and/or diastolic ≥90 mm Hg. For children use age/gender/height percentiles (see appendix).

At least two elevated office BP readings on separate days required
Adult threshold: systolic ≥140 mm Hg and/or diastolic ≥90 mm Hg
Pediatric reference: NHLBI BP levels by age/height percentiles (appendix)

Documentation Required

Use ABPM to confirm diagnosis

When office and home blood pressure measurements are discordant or there is uncertainty about threshold values, consider 24-hour ambulatory blood pressure monitoring (ABPM) to establish the diagnosis. Home blood pressure monitoring may help confirm elevated readings; ABPM is preferred when results disagree or are unclear.

Use ABPM to confirm diagnosis when office and HBPM are not in agreement or thresholds are uncertain
HBPM and AOBP have limitations; ABPM is the reference standard in uncertain cases

Prior Authorization

Repeat testing interval

Repeat ambulatory blood pressure monitoring is generally not necessary more frequently than every 6 months. ABPM for less than 24 hours or more than 3 days is not considered medically necessary.

Repeat testing interval: generally not more frequently than every 6 months
Duration limits: medically necessary duration is ≥24 hours and ≤3 days

Note

Reference resources for documentation

Reference resources and additional documentation links are provided for provider use, including the NHLBI pediatric BP tables, CPB cross-references, glossary, FAQs, and legal/plan disclosure pages. Use these resources to support documentation and benefit verification.

Appendix pediatric BP tables: NHLBI link
Related policy: CPB 0019 - Holter Monitors
Additional resources: Glossary, FAQs, Legal Notices, Plan Disclosures (see Aetna links)

Key Definitions

CABP / ABPM definition — continuous ambulatory blood pressure monitoring description

DefinitionContinuous ambulatory blood pressure (CABP) monitoring (also called ABPM) is a noninvasive method using a portable battery‑operated monitor worn on the hip and connected to an inflatable cuff to measure BP at preset intervals over a specified period.

Typical device operationCuff inflates automatically at preset intervals (usually every 15–30 minutes daytime and every 30–60 minutes at night) with readings recorded for later retrieval and interpretation.

Monitoring purposeUsed to determine BP variability, detect nocturnal patterns, and establish diagnosis before lifelong antihypertensive therapy is initiated.

Dipping / non-dipping — nocturnal drop >10% vs <10% and clinical significance

Dipper vs non-dipper'Dipping' is a nocturnal BP drop greater than 10%; 'non-dippers' have <10% nocturnal BP decrease and may have higher cardiovascular mortality.

Clinical significanceNon‑dipping status has been associated with increased cardiovascular risk and may influence treatment assessment.

Measurement capabilityABPM can capture nocturnal BP changes to identify dipping status reliably over the monitoring period.

Nocturnal patterns — dipping, non-dipping, reverse dipping, excessive dipping, nocturnal hypertension

DippingA normal nocturnal pattern with a >10% drop in BP at night compared with daytime values (may be termed 'dipping')

Non‑dipping and reverse dippingNon‑dipping: <10% nocturnal fall; Reverse dipping: BP increases at night — both patterns may have clinical relevance for risk and therapy response.

Excessive dipping and nocturnal hypertensionExcessive dipping (marked nocturnal fall) and isolated nocturnal hypertension can be identified by ABPM and may affect management decisions.

Sustained / White-coat / Masked hypertension definitions as used in studies

Sustained hypertensionElevated office BP and elevated out‑of‑office BP (ABPM or HBPM) — e.g., office BP ≥140/90 mm Hg plus ABPM ≥130/80 mm Hg or HBPM ≥135/85 mm Hg

White‑coat hypertensionElevated office BP but normal ABPM or HBPM (office ≥140/90 mm Hg with ABPM <130/80 mm Hg or HBPM <135/85 mm Hg)

Masked hypertensionNormal office BP but elevated ABPM or HBPM (office <140/90 mm Hg with ABPM ≥130/80 mm Hg or HBPM ≥135/85 mm Hg)

OpenPayer

Automated Ambulatory Blood Pressure Monitoring

Coverage and Medical Necessity Criteria

Coding and Billing

Provider Actions, Prior Authorization, and Documentation

Clinical Background and Rationale

Key Definitions