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    v1.0.28
    OpenPayerBilling CodesHome Visit ServicesCPT cpt-99504-home-mechanical-ventilation-care-respiratory-therapist
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    CPT 99504: Home Mechanical Ventilation Care by Respiratory Therapist

    CPT code 99504 describes a licensed respiratory therapist or other non-physician provider delivering mechanical ventilation care in the patient’s home, categorized as a home-based respiratory therapy service provided at the home site of service; the code is used for documenting and billing skilled non-physician respiratory management for ventilator-dependent patients receiving ventilator-related monitoring, assessment, and interventions in the home environment.

    For related coverage guidance, see recent payer policy updates: Interferential Stimulation Devices (for home use), Durable Medical Equipment (DME): Tumor Treating Fields (Alternating Electric Field Therapy) Medical Guideline, Durable Medical Equipment (DME): Bone Growth Stimulators Medical Guideline.

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    Clinical & Coding Specifications

    Clinical Context

    A common real-world scenario involves an adult patient with chronic respiratory failure due to advanced chronic obstructive pulmonary disease (COPD) who is discharged home on a mechanical ventilator. A home health agency coordinates services: a licensed respiratory therapist (RT) visits the patient’s home to provide ongoing mechanical ventilation care, including ventilator setup verification, delivery of ventilator therapies, equipment troubleshooting, assessment of interface and skin integrity, suctioning, ventilator alarm response, ventilator mode or parameter checks per established orders, oxygen titration, and education of the patient and caregiver on emergency procedures. The RT documents time, interventions, ventilator settings, patient tolerance, and any physician communication. Billing uses 99504 for the RT or non-physician provider visit for mechanical ventilation care in the patient’s home. Typical workflow includes referral from the discharging hospital or durable medical equipment (DME) provider, physician orders for home mechanical ventilation, scheduled RT visits for routine ventilator management and ad hoc visits for alarms or clinical deterioration, and periodic communication with the ordering physician and home health agency for plan-of-care updates.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    99504A licensed respiratory therapist or other non-physician provider provides mechanical ventilation care in the patient’s home.Primary code for in-home ventilator management visits provided by an RT or other non-physician provider.
    94760Noninvasive ear or pulse oximetry for oxygen saturation by continuous overnight monitoring (single or multiple nights); recorded, unattended.Often used adjunctively for oxygenation monitoring when assessing ventilated patients at home.
    94664Demonstration and/or evaluation of patient utilization of an approved home ventilator or related respiratory device (includes instruction).Used for initial education and device demonstration when the patient/family are trained on home ventilator use.
    94002Ventilation assist and management, initiation of pressure or volume preset ventilators for inpatient or observation setting; hospital inpatient/observation care, first day.Related inpatient initiation code; documents hospital initiation before transition to home care billed with 99504 after discharge.
    99507Services provided in the home other than those specifically listed (e.g., other home health services provided by qualified personnel).May be used for other home-based respiratory services when 99504 does not fully describe the service; payer rules apply.

    Related Modifiers

    8 rows

    ModifierDescriptionWhen to Use
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    51Modifier –51 (Multiple Procedures) is used when the same provider performs multiple procedures in the same session to identify secondary, non‑exempt procedures and indicate payment reduction logic…- Use modifier -51 when the same provider performs multiple distinct procedures during the same patient encounter: report the highest‑valued procedure first (no modifier) and append -51 to…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    55Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…
    82Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    364S00000XClinical Nurse SpecialistA registered nurse who, through a graduate degree program in nursing, or through a formal post-basic education program or continuing education courses…
    207RP1001XPulmonary Disease PhysicianAn internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational an…
    261QP2400XPrison Health Clinic/CenterAmbulatory Health Care Facilities · Clinic/Center
    225CX0006XOrientation and Mobility Training Rehabilitation CounselorOrientation and Mobility (O&M) specialists teach children and adults who have visual impairments the specific orientation skills used to find one's wa…
    2080S0012XPediatric Sleep Medicine PhysicianA Pediatrician who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic…
    2865M2000XMilitary General Acute Care HospitalA Department of Defense (DoD) health care organization furnishing inpatient care 24 hours per day in "fixed" facilities, primarily for DoD beneficiari…
    246ZN0300XNephrology Specialist/TechnologistTechnologists, Technicians & Other Technical Service Providers · Specialist/Technologist, Other
    332BD1200XDialysis Equipment & Supplies (DME)Suppliers · Durable Medical Equipment & Medical Supplies

    Related Payer Policy Updates

    Specialty: Durable Medical Equipment (DME)1 / 3

    5 rows

    PolicyPayerEffective Date
    Interferential Stimulation Devices (for home use)Moda Health2026-10-01
    Durable Medical Equipment (DME): Tumor Treating Fields (Alternating Electric Field Therapy) Medical GuidelineWPS Health Insurance2026-10-01
    Durable Medical Equipment (DME): Bone Growth Stimulators Medical GuidelineWPS Health Insurance2026-10-01
    General Durable Medical Equipment (DME) Medical GuidelineWPS Health Insurance2026-10-01
    Prior Authorization for Durable Medical Equipment (DME)Blue Cross Blue Shield - Rhode Island2026-10-01

    Related Codes

    CPT-99500-HOME-PRENATAL-MONITORING-ASSESSMENT

    CPT 99500: Prenatal Home Health Visit for Pregnancy Complications

    CPT-99501-POSTPARTUM-NEWBORN-HOME-VISIT

    CPT 99501: Home Health Visit for Postpartum and Newborn Follow-Up

    CPT-99502-NEWBORN-HOME-VISIT-NEWBORN-EVALUATION-EDUCATION

    CPT 99502: Newborn Home Visit for Evaluation and Education

    CPT-99503-HOME-RESPIRATORY-THERAPY-NON-PHYSICIAN-PROVIDER

    CPT 99503: Respiratory Therapy in Patient's Home

    CPT-99505-HOME-VISIT-STOMA-CARE

    CPT 99505: Home Visit for Stoma Care

    CPT-99506-HOME-INTRAMUSCULAR-INJECTION-HOME-VISIT

    CPT 99506: Home Visit for Intramuscular Injection by Nurse

    CPT-99507-HOME-HEALTH-CATHETER-ASSESSMENT

    CPT 99507: Home Health Catheter Evaluation

    CPT-99509-HOME-HEALTH-ADL-SELF-CARE-VISIT

    CPT 99509: Home Health Visit for ADL and Self-Care Support

    CPT-99510-HOME-COUNSELING-PSYCHOLOGIST-SOCIAL-WORKER

    CPT 99510: Home Counseling by Psychologist or Social Worker

    CPT-99511-HOME-MANAGEMENT-AND-REMOVAL-OF-FECAL-IMPACTION

    CPT 99511: Home Visit for Fecal Impaction Management and Removal

    Showing 1–10 of 12

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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