Instant Answer
HCPCS (current)
J3590
NOC unclassified biologics; C9399 alt for HOPPS
Min dose
≥3 × 10⁶ CD34+/kg
Typical 4–20 × 10⁶/kg
HSC infusion CPT
38241
Autologous HSCT
Apheresis CPT
38206 / 0540T
Autologous HSC harvest
Busulfan
J0594
PK-adjusted myeloablation, 4 d
Age cutoff
≥12 yr
SCD only (NO TDT indication)
Product WAC
~$3.1M
One-time; plus facility ~$500K–$1M+
Inpatient stay
~30–45 d
Busulfan + HSC + engraftment
FDA approval
Dec 8, 2023 SCD
Same day as Casgevy SCD approval
BOXED WARNING — hematologic malignancy. Myeloid malignancies (AML, MDS) reported post-treatment.
BB305 lentiviral vector + busulfan genotoxicity = small insertional-mutagenesis risk. Lifelong CBC w/diff
surveillance through year 15+; enroll patient in bluebird LTFU REMS at PA stage. THE major differentiator
vs Casgevy (no boxed warning).
Top denial driver: SCD genetic confirmation missing. Submit hemoglobinopathy genotyping
(HbSS / HbSC / HbS-β-thal) plus history of vaso-occlusive events at PA intake. #2 = administration at non-QTC
facility. #6 (Lyfgenia-specific) = hematologic-malignancy REMS enrollment missing. #7 = TDT attempted (use Casgevy).
Multi-Stage Encounter (5 phases)
| Phase | Timing | Setting | Key codes |
| 1. Apheresis HSC collection | ~6 mo pre-infusion | QTC outpatient (POS 22) | CPT 38206 or 0540T + plerixafor J2562 (SCD) |
| 2. Ex vivo lentiviral transduction (BB305) | 3–6 mo at bluebird facility | bluebird (no provider billing) | n/a (manufacturer internal) |
| 3. Busulfan myeloablative conditioning | 4 days pre-infusion | QTC inpatient (POS 21) | J0594 (busulfan, per mg) + 96413 chemo admin |
| 4. Autologous HSC infusion | Day 0 | QTC inpatient (POS 21) | J3590 + CPT 38241 (HSCT autologous) |
| 5. Engraftment + LTFU surveillance | 30–45 d inpatient, then outpatient mo 1–24+ through year 15 | QTC inpatient then outpatient | Bundled into HSCT DRG; outpatient E/M + labs + hematologic-malignancy CBC surveillance per BOXED warning |
Gene Therapy Class Comparison
| Therapy | Mechanism | Indication | Billing pathway | Product list |
| Lyfgenia (J3590) | Lentiviral BB305 + bA-T87Q (ex vivo HSC) | SCD ≥12 yr (no TDT) | Multi-stage HSCT | ~$3.1M (BOXED warning) |
| Casgevy (J3590) | CRISPR/Cas9 BCL11A edit (ex vivo HSC) | SCD / TDT ≥12 yr | Multi-stage HSCT | ~$2.2M |
| Zolgensma (J3399) | AAV9 + SMN1 (in vivo) | Pediatric SMA <2 yr | Single IV infusion | ~$2.125M |
| Hemgenix (J1411) | AAV5 + FIX-Padua (in vivo) | Adult hemophilia B | Single IV infusion | ~$3.5M |
| Roctavian (J1412) | AAV5 + FVIII-SQ (in vivo) | Adult hemophilia A | Single IV infusion | ~$2.9M |
ICD-10 by Indication (SCD ONLY)
SCD (vaso-occlusive events)
| HbSS with crisis (VOC) | D57.00 / D57.01 |
| HbSC with crisis | D57.20x / D57.21x |
| HbS-β-thal with crisis | D57.40x / D57.41x |
| Sickle-cell trait (NOT eligible) | D57.3 |
NOT Lyfgenia — use Casgevy
| β-thal major (Cooley's) TDT | D56.1 → Casgevy |
| HbE-β-thal TDT | D56.5 → Casgevy |
| Long-term chelator use | Z79.899 |
| Hx stem cell transplant (post) | Z94.81 |
Site of Care — QTC Only
Qualified Treatment Centers (QTCs) only. bluebird credentials a network of FACT-accredited
HSCT-eligible facilities with established autologous HSCT programs, busulfan dose-banding experience, apheresis
capability, cryopreservation chain-of-custody, and hematologic-malignancy long-term follow-up capability. Many QTCs
are also Casgevy ATCs. Office-based, AIC, and home administration are categorically not appropriate.
Directory at lyfgenia.com/hcp.
Top 7 Denials
| # | Reason | Fix |
| 1 | SCD genetic confirmation missing | Submit hemoglobinopathy genotyping + electrophoresis |
| 2 | Non-QTC facility | Re-route to credentialed QTC (lyfgenia.com/hcp) |
| 3 | VOC documentation gap | Submit detailed VOC log; document hydroxyurea trial |
| 4 | Patient < 12 yr | Not FDA-approved; maintain supportive care |
| 5 | HSCT eligibility incomplete | Complete standard pre-HSCT workup at QTC |
| 6 | Hematologic-malignancy REMS not enrolled | Enroll in bluebird LTFU program at PA stage (Lyfgenia-specific) |
| 7 | TDT attempted (no Lyfgenia indication) | Refer to Casgevy for β-thalassemia patients |
Patient Assistance & Payer Model
Hub
bluebird Patient Services: 1-833-999-6760 / lyfgenia.com/hcp — QTC referral, apheresis
logistics, manufacturing chain-of-custody, fertility-preservation counseling, travel/lodging, outcomes-based
contract administration, hematologic-malignancy LTFU REMS enrollment (year-15+ surveillance).
Foundations
Sickle Cell Disease Association of America (SCDAA), BMT InfoNet, PAN Foundation (rare disease), HealthWell
Foundation, Patient Advocate Foundation.
Outcomes-based contracts
Common with all major commercial payers and CMS CGT Access Model (Medicaid). 3–5 yr milestone tracking
(absence of severe VOCs). Provider documents outcomes data at mo 6, 12, 24, 60, plus annual hematologic
surveillance through year 15.
CMS CGT Access Model
Launched January 2025. CMS negotiates OBAs for SCD gene therapies (Casgevy + Lyfgenia) on behalf of >20
participating state Medicaid agencies. Standardized outcomes metrics, pricing, and milestone tracking.