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Clinical immunology billing spans two different worlds: reflex-driven autoantibody/immunodeficiency serology and dose-unit allergen immunotherapy billing. Each has distinct frequency rules, reflex logic, and audit history. Generalist billers; even those built for routine chemistry or hematology, rarely master both. The result is quiet revenue loss, from unbilled reflex panels to under-tracked immunotherapy vials, until an audit reveals a substantial gap.
Reflex Autoantibody Panel Capture Gaps
Allergen Immunotherapy Dose-Unit Miscounting
Immunoglobulin & Complement Frequency Denials
Lymphocyte Subset Flow Cytometry Underbilling
Allergy Testing Method & Unit Mismatches
Antinuclear antibody screening and titer (86038, 86039), rheumatoid factor (86431), anti-cyclic citrullinated peptide (86200), anti-neutrophil cytoplasmic antibody (86021), anti-double-stranded DNA (86225), and extractable nuclear antigen panels reflexed from a positive ANA.
Reflex protocols must be built into the ordering workflow so a positive ANA automatically captures the appropriate follow-up panel --- missing that reflex step is one of the most common sources of uncollected autoimmune serology revenue.
Total hemolytic complement (CH50, 86162), complement antigen for individual components such as C3 and C4 (86160), and functional complement activity testing (86161) used to evaluate autoimmune disease activity and complement deficiency.
Complement testing ordered on a fixed surveillance schedule rather than tied to a documented change in disease activity is a routine medical necessity denial driver, especially for recurring autoimmune disease monitoring.
Quantitative IgA, IgG, and IgM (82784, billed once per immunoglobulin class), IgG subclass quantification (86334), and IgG subclass 4 specifically when clinically indicated (86336), used to evaluate suspected primary or secondary immunodeficiency.
Each immunoglobulin class and each IgG subclass must be billed as a separate line item matching the lab report exactly --- combining classes into a single line, or billing a panel that wasn't fully performed, is a frequent audit finding.
B-cell (86355), T-cell (86359), natural killer cell (86357), and CD4/CD8 T-cell subset (86360) flow cytometry panels used to characterize suspected primary immunodeficiency, HIV-related immune status, and post-transplant immune reconstitution.
Marker panels must be billed against the exact antibody combinations run and interpreted --- undercounting markers actually reported on a complex immunodeficiency workup leaves earned interpretation revenue on the table.
Percutaneous scratch/prick testing (95004), intracutaneous testing typically performed when percutaneous results are ambiguous (95024), and patch testing for contact dermatitis (95044), each billed per allergen tested as a separate unit.
The number of units billed must equal the number of individual allergens actually tested and documented in the chart --- unit counts that don't reconcile with the allergen panel ordered are a leading cause of allergy testing denials.
In-vitro allergen-specific IgE antibody testing performed by immunoassay for a single allergen (86003) or for a recombinant or component allergen (86008), used as an alternative or adjunct to skin testing.
Each allergen tested is billed as a separate unit, and coverage often depends on documenting why in-vitro testing was chosen over or alongside skin testing for that specific patient.
Single (95115) and multiple (95117) antigen injection administration, single-dose vial preparation (95144), multi-dose vial preparation for single or multiple antigens (95165), and stinging insect venom preparation (95145-95149, 95170).
Medicare recognizes a maximum of 10 one-cc doses per multi-dose vial under CPT 95165 --- billing beyond that limit, or billing doses the medical record doesn't support, is the single most frequently audited pattern in allergen immunotherapy billing.
Low- and high-resolution HLA Class I and Class II typing used to support transplant workup, celiac disease risk assessment, and select drug hypersensitivity screening such as HLA-B*57:01 and HLA-B*15:02.
HLA typing coverage is tightly indication-specific --- claims must document the exact clinical question being answered, since the same CPT code can be covered for one indication and denied outright for another.
TransLabs’ specialized RCM services are built exclusively for labs, addressing the unique challenges that generalist billers miss. We provide end-to-end revenue cycle solutions designed specifically to turn laboratory complexity into profitability.
Complete payer enrollment, CLIA certification management, and network participation setup across all insurance carriers. TransLabs manages every credentialing detail so that your laboratory gets paid in-network from day one without any administrative delays.
Real-time insurance verification, benefits investigation, and prior auth completed before specimen processing begins. Confirming coverage upfront eliminates preventable denials and protects your lab from unexpected reimbursement failures.
Patient registration, appointment coordination, insurance verification, and customer service excellence managed by experienced laboratory billing professionals. A well-run front office reduces downstream billing errors and creates a better experience.
TransLabs provides expert RCM services to clinical laboratories in all 50 states, delivering the same exceptional results whether you’re a community hospital lab or a large reference facility. We bring specialized lab billing expertise to facilities nationwide, combining remote efficiency with hands-on partnership.
Each Medicare Administrative Contractor maintains its own LCD specifying which ICD-10 diagnoses support coverage for ANA, complement, immunoglobulin, and flow cytometry immunodeficiency testing. TransLabs maintains live LCD databases and validates diagnosis-to-test linkage on every Medicare claim before submission.
Medicare recognizes a maximum of 10 one-cc doses per multi-dose vial under CPT 95165, and the units billed must reflect the doses actually prepared and documented, not simply how many aliquots were removed. TransLabs tracks dose counts per vial and per patient automatically, the same control gap that has produced real payer audit findings and recoupment demands in this specialty.
Medicare and most commercial payers expect immunoglobulin, IgG subclass, and complement testing to be tied to a documented clinical change rather than billed on a routine surveillance schedule. TransLabs monitors testing frequency against each patient's clinical history and flags orders that risk a medical necessity denial before submission.
Reflex panels, such as an ENA panel triggered by a positive ANA, must be supported by documentation showing the reflex logic was followed and clinically appropriate, not applied as a blanket protocol to every specimen. TransLabs builds these reflex rules directly into claim validation.
When an HLA typing panel, extended flow cytometry workup, or immunotherapy course may not meet medical necessity criteria under the applicable LCD, a valid ABN must be issued before testing begins. TransLabs builds ABN workflows into front-end intake for these higher-scrutiny test categories.
The CLFS sets Medicare payment rates for clinical immunology lab tests and updates annually on January 1. TransLabs monitors CLFS changes, updates billing tables immediately at each rate change, and identifies when a payer is paying below CLFS rates.
State and federal audits have repeatedly identified allergen immunotherapy claims where the number of doses billed exceeded what the medical record supported, resulting in recoupment. TransLabs builds compliance protocols specifically around this documented risk pattern to reduce your audit exposure before it becomes a problem.
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