Insurance & Coding
CPT codes, payer policies, and reimbursement strategies
There is no dedicated CPT code for leech therapy. Practitioners must use unlisted or analogous codes, which complicates reimbursement. Coverage is generally limited to the FDA-cleared indication (venous congestion in flaps, grafts, and replants). Off-label indications are rarely covered by commercial insurers. The self-pay market is the primary revenue model for outpatient hirudotherapy practices.
Procedure Coding
| Code | System | Description | Application |
|---|---|---|---|
| 17999 | CPT | Unlisted procedure, skin/mucous membrane/subcutaneous tissue | Primary code for leech application procedure |
| C1765 | HCPCS | Adhesion barrier | Leech supply (hospital outpatient) |
| 97602 | CPT | Non-selective wound care debridement | Occasionally used; Status B (bundled) — no separate Medicare payment |
Use of unlisted code 17999 requires submission of operative/procedure notes, a cover letter explaining the nature of the service, and supporting documentation to justify medical necessity. Reimbursement is determined on a case-by-case basis.
Aetna Clinical Policy Bulletin 0556
Medically Necessary (Covered)
- Poor venous drainage (venous congestion/outflow obstruction)
- Salvage of vascularly compromised flaps (muscle, skin, fat tissue)
- Salvage of vascularly compromised replants
These align directly with the FDA 510(k)-cleared indications.
Not Covered
- Use after rhinoplasty
- All other indications not listed above
Rationale: “insufficient evidence of its safety and effectiveness” (Aetna CPB 0556, last reviewed 09/01/2026). This is the most explicit commercial insurance policy addressing medicinal leech therapy.
Other Major Payers
Commercial Insurers
UnitedHealthcare has not published a commercial medical policy specifically addressing leech therapy (none appears on its commercial medical and drug policy list), whereas Aetna publishes a dedicated bulletin (CPB 0556).
Medicare & Medicaid
Medicare: No national coverage determination (NCD) or local coverage determination (LCD) exists. No dedicated HCPCS code. In the inpatient setting, leeches are typically billed as part of the DRG payment. Outpatient separate payment is not assured.
Medicaid: Coverage varies by state. No specific Medicaid policy addressing leech therapy has been identified.
Self-Pay Pricing
Typical Outpatient Fee Structure
| Parameter | Typical Value |
|---|---|
| Session fee | ~$200 |
| Leeches per session | 3-7 (determined by practitioner) |
| Session duration | 30-90 minutes |
| Sessions per course | 7-9 (1-2 per week) |
| Total course cost | $1,400-$1,800 |
| Leech procurement cost | About $18-$20 per leech from U.S. suppliers |
Some clinics offer package pricing for multi-session courses. A session using 5 leeches costs approximately $90-$100 in leeches alone, before disposables, PPE, antibiotic prescriptions, and practitioner time.
Cost-Effectiveness Evidence
Economic Justification
A 2022 conference abstract (King et al.) in Plastic and Reconstructive Surgery - Global Open examined cost efficiency of varying durations of leech therapy for revascularized digits with venous congestion. In the hospital setting, leech therapy cost must be weighed against re-operation for venous anastomosis revision — which carries substantially higher surgical, anesthesia, and recovery costs. Published flap salvage rates of 65-85% (Herlin 2017) support cost-effectiveness relative to flap loss.
For non-surgical indications (e.g., knee OA), the cost of a leech course (the knee-OA randomized trials tested one or two leech applications per patient) can be compared with intra-articular hyaluronic acid ($500-$2,000/course), PRP injections ($350-$2,815 per injection, median $800), and total knee arthroplasty ($30,000-$50,000). However, head-to-head cost-effectiveness studies have not been conducted.
Documentation for Reimbursement
Maximizing Reimbursement Probability
- Detailed procedure note: Clinical indication, number/placement of leeches, duration, outcome
- Clinical photographs: Before, during, and after — documenting venous congestion and response
- Literature citations: Supporting evidence for the specific indication
- Letter of medical necessity: From the ordering physician (for non-surgeon applicators)
- FDA clearance documentation: Copy of 510(k) summary if requested by payer
Related Resources
Regulatory Framework
FDA 510(k) clearance details.
Building a Practice
Business model and startup costs.
Documentation Templates
SOAP notes and treatment logs.
Clinical Knowledge Support
Tier A/B/C evidence framework — supports prior-authorization narratives with graded evidence.
Coverage Map
Payer-by-payer coverage policy reference for hirudotherapy CPT 99199 and procedure billing.