C1605: Pacemaker, leadless, dual chamber (right atrial and right ventricular implantable components), rate-responsive, including all necessary components for implantation
C1605 is a HCPCS Level II code for pacemaker, leadless, dual chamber (right atrial and right ventricular implantable components), rate-responsive, including all necessary components for implantation. It belongs to the Outpatient Prospective Payment System section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Special coverage instructions apply
There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q4-Oct. This states Medicare’s position on the code, not on your particular claim.
Medically Unlikely Edits: units per day
The most units of C1605 Medicare will pay on one date of service. Bill more on a single line and it is denied. The limit is not the same in every setting, so the row that matters is the one matching the claim you are building.
- practitioner
- 1 unit MAI 2: Date of Service Edit: Policy · Code Descriptor / CPT Instruction
- outpatient
- 1 unit MAI 2: Date of Service Edit: Policy · Code Descriptor / CPT Instruction
The adjudication indicator decides whether exceeding the limit is worth appealing at all: MAI 1 is a line edit you can support with documentation, MAI 3 is a date-of-service edit that is also appealable, and MAI 2 is absolute, no documentation overrides it. CMS MUE 2026Q4.
The CMS record for C1605
- Long descriptor
- Pacemaker, leadless, dual chamber (right atrial and right ventricular implantable components), rate-responsive, including all necessary components for implantation
- Short descriptor
- Pmkr, dual, leadless
- Added
- July 1, 2024
- BETOS
- D1A
- Pricing indicator
- 53: Other
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service: CMS's own analytic grouping.
Statute.
Codes adjacent to C1605
HCPCS has no hierarchy: related items simply sit next to each other in the numbering. If C1605 is not quite right, the correct code is very often within a few positions of it.
- C1052Hemostatic agent, gastrointestinal, topical
- C1062Intravertebral body fracture augmentation with implant (e.g., metal, polymer)
- C1300Hyperbaric oxygen under pressure, full body chamber, per 30 minute intervalterminated
- C1600Catheter, transluminal intravascular lesion preparation device, bladed, sheathed (insertable)
- C1601Endoscope, single-use (i.e. disposable), pulmonary, imaging/illumination device (insertable)
- C1602Orthopedic/device/drug matrix/absorbable bone void filler, antimicrobial-eluting (implantable)
- C1603Retrieval device, insertable, laser (used to retrieve intravascular inferior vena cava filter)
- C1604Graft, transmural transvenous arterial bypass (implantable), with all delivery system components
- C1606Adapter, single-use (i.e. disposable), for attaching ultrasound system to upper gastrointestinal endoscope
- C1607Neurostimulator, integrated (implantable), rechargeable with all implantable and external components including charging system
- C1608Prosthesis, total, dual mobility, first carpometacarpal joint (implantable)
- C1609Vertebral device, motion-preserving, with screw fixation
- C1713Anchor/screw for opposing bone-to-bone or soft tissue-to-bone (implantable)
- C1714Catheter, transluminal atherectomy, directional
- C1715Brachytherapy needle
- C1716Brachytherapy source, non-stranded, gold-198, per source