Billing Code Overview

HCPCS Level II code M1418 describes patients who are not up to date on their COVID-19 vaccinations as defined by CDC recommendations because of a medical contraindication documented by a clinician. The code is used to indicate patient vaccination status when a documented medical contraindication prevents completion of current COVID-19 vaccination recommendations.

Service type: Vaccination status documentation / medical exemption assessment

Typical site of service: Outpatient clinic, primary care office, public health clinic, or other ambulatory care settings

Data not available in the input.

Clinical Context

A 52-year-old patient presents to a primary care clinic for routine follow-up and immunization review. The clinician reviews the patient’s vaccination history and determines the patient is not up to date on COVID-19 vaccination per current CDC recommendations due to a documented medical contraindication (for example, a history of severe immediate allergic reaction to a prior mRNA COVID-19 vaccine component). The clinician documents the contraindication in the medical record, discusses risks and benefits, updates the immunization record, and codes the visit to indicate the patient is not up to date due to a medical contraindication.

Typical workflow:

• Patient arrives for a preventive or chronic care visit during which vaccination status is assessed.

• Clinician reviews immunization registry and history, evaluates contraindications, and documents the medical rationale for deferring COVID-19 vaccination.

• Clinician applies the HCPCS Level II billing code M1418 to denote the specific reason the patient is not up to date on COVID-19 vaccination (medical contraindication). Related encounter documentation includes clinical notes, allergy history, and any specialist consultation if applicable.

• Billing staff appends appropriate claim modifiers as needed and submits claims to payors such as Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare according to payer policies.

Typical site of service: outpatient primary care clinic, specialty allergy/immunology clinic, or ambulatory care center.

Typical patient scenario: adult with documented anaphylactic reaction to a prior vaccine component; clinician documents contraindication and uses M1418 on claim to indicate reason for not receiving current COVID-19 vaccine per CDC guidance.

Coding Specifications

| 23 | Unusual anesthesia | Rarely applicable; use only if unrelated anesthesia was provided during visit.

| 52 | Reduced services | Use when the service was partially reduced or not fully performed.

| 53 | Discontinued procedure | Use if vaccination process was started and then stopped due to adverse event or contraindication.

| 54 | Surgical care only | Not commonly used for this code; include only if separate surgical care billing occurs.

| 55 | Postoperative management only | Not commonly used; include only if post-op care billed separately.

| 56 | Preoperative management only | Use only if pre-op evaluation billed separately from the encounter documenting contraindication.

| 62 | Two surgeons | Rarely applicable; include only in complex cases requiring two surgeons.

| AS | Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery | Not typical; include only per payer rules when applicable.

| CQ | Service furnished by a resident, teaching physician not required to be present | Use when a resident furnishes the service under applicable teaching hospital rules and the service meets CQ criteria.

| QK | Medical direction of two, three, or four concurrent anesthesia procedures involving qualified individuals | Not typically relevant; include only per anesthesia billing rules.

| QX | CRNA service with medical direction by physician | Not typical; include only if anesthesia services billed concurrently.

| QY | Service furnished under an approved rural health clinic or federally qualified health center (FQHC) alternate billing arrangement | Use when the service is furnished under qualifying clinic billing rules.

| 208D00000X | Internal Medicine | Adult medicine clinicians who commonly document vaccine contraindications during visits.

| 207K00000X | Pediatrics | For adolescent patients with documented contraindications to COVID-19 vaccination.

| 207L00000X | Allergy & Immunology | Specialists who evaluate and document vaccine-related allergic contraindications.

| 363A00000X | Infectious Disease | Specialists involved for complex vaccine contraindication assessment and guidance.

Related Diagnoses

| T78.2XXA | Anaphylactic shock, unspecified, initial encounter | Relevant when patient has history of anaphylaxis to vaccine component leading to contraindication.

| Z88.0 | Allergy status to penicillin | Example allergy code; certain vaccine components or excipients may cross-react with known allergies and influence contraindication documentation.

| Z91.018 | Patient has had an adverse reaction to vaccination | Documents past adverse reaction that supports current contraindication.

| Z00.129 | Encounter for routine child health examination without abnormal findings | For pediatric preventive visits where contraindication to COVID-19 vaccine is documented.

| J30.2 | Other seasonal allergic rhinitis | Common comorbidity relevant to allergy evaluation; may be documented when assessing vaccine allergy risk.

| D69.5 | Secondary thrombocytopenia | Example medical condition that may be relevant to vaccine contraindication assessment in certain clinical contexts.

| M35.00 | Sicca syndrome, unspecified | Autoimmune conditions occasionally influence vaccine decision-making and may be part of the clinical record when documenting contraindications.

Related CPT Codes

| 99203 | Office or other outpatient visit for the evaluation and management of a new patient, typically 30 minutes | Used when a new patient presents and the clinician documents vaccination contraindication during initial evaluation.

| 99401 | Preventive medicine counseling and/or risk factor reduction intervention(s) provided to an individual, 15 minutes | Used when focused counseling on vaccine risks, benefits, and alternatives is provided during the visit.

| 96372 | Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); subcutaneous or intramuscular | May be billed if an alternative injectable (non-COVID) vaccine or medication is administered in the same encounter.

| 94640 | Pressurized or non-pressurized inhalation treatment for acute airway obstruction; initial, single therapeutic administration | Included for clinics that may provide acute treatment if a vaccination attempt causes a reaction; used rarely but relevant in workflow.