Summary & Overview
HCPCS Level II M1457: Asthma Diagnosis Documentation
HCPCS Level II code M1457 documents the presence of asthma when a patient had any contact during the current or prior performance period or when asthma appears on an active problem list at any time during the performance period. This designation is important for quality measurement, population health management, and performance reporting tied to chronic respiratory conditions nationally. It signals that a patient has asthma for purposes of tracking care gaps, outreach, and adherence to guideline-based management.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find context on the clinical role of the code, how it is used in ambulatory and outpatient settings to identify and monitor patients with asthma, and what national stakeholders typically consider when integrating such registry-style codes into quality programs. The publication provides benchmarks and reporting considerations, summarizes policy and documentation implications relevant to performance measurement, and outlines the clinical context for asthma identification — including when and where documentation on problem lists or encounters satisfies the code definition. Data not available in the input are clearly noted where applicable.
Billing Code Overview
HCPCS Level II code M1457 identifies patients with a diagnosis of asthma who had any clinical contact during the current or prior performance period or who had asthma documented on an active problem list any time during the performance period.
Service type: Chronic disease identification and monitoring — this code is used for tracking the presence of asthma for quality measurement and care management purposes.
Typical site of service: Outpatient clinical settings, including primary care clinics, pulmonology or allergy specialty clinics, and other ambulatory care locations where diagnosis and problem-list documentation occur.
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A primary care patient presents for a routine chronic disease follow-up visit. The patient has a documented diagnosis of asthma on the active problem list and had at least one clinical contact for asthma during the current or prior performance period. The encounter typically occurs in an outpatient clinic or primary care office where the provider reviews asthma control, inhaler technique, medication adherence, and recent exacerbations. Vital signs and focused respiratory exam are performed; peak expiratory flow or spirometry may be reviewed if available. The clinician documents asthma diagnosis, recent contacts (telephone triage, urgent care, ED visit, or prior clinic visit), current medications including inhaled corticosteroids and short-acting beta-agonists, and self-management plan. This documentation supports quality measurement for asthma prevalence and contact during the performance period as described by billing code M1457.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service by the same physician on the same day of the procedure | Use when an E/M is performed in addition to a procedure or service during the same visit and documentation supports a separate E/M |
59 | Distinct procedural service | Use to indicate a service that is distinct or independent from other services performed on the same day