S3866: Genetic analysis for a specific gene mutation for hypertrophic cardiomyopathy (hcm) in an individual with a known hcm mutation in the family
S3866 is a HCPCS Level II code for genetic analysis for a specific gene mutation for hypertrophic cardiomyopathy (hcm) in an individual with a known hcm mutation in the family. It belongs to the Temporary National Codes (Non-Medicare) section. Medicare does not pay it: see the coverage note below before you bill it.
Medicare coverage: Not payable by Medicare
Medicare does not pay this code. It may still be valid for another payer, but a Medicare claim carrying it will not be reimbursed.
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.
Physician fee schedule statusI
Not valid for Medicare purposes. Medicare uses another code.
Global period: XXX
Want the dollar amount for your locality? The fee calculator applies your GPCI and the current conversion factor.
The CMS record for S3866
- Long descriptor
- Genetic analysis for a specific gene mutation for hypertrophic cardiomyopathy (hcm) in an individual with a known hcm mutation in the family
- Short descriptor
- Spec gene test hyp cardiomy
- Added
- April 1, 2009
- BETOS
- Z2
- Pricing indicator
- 00: Not priced by Part B
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.
Service not separately priced by Part B, not covered, bundled into another service, or used by Part A only.
Codes adjacent to S3866
HCPCS has no hierarchy: related items simply sit next to each other in the numbering. If S3866 is not quite right, the correct code is very often within a few positions of it.
- S3849Genetic testing for niemann-pick disease
- S3850Genetic testing for sickle cell anemia
- S3852Dna analysis for apoe epsilon 4 allele for susceptibility to alzheimer's disease
- S3853Genetic testing for myotonic muscular dystrophy
- S3854Gene expression profiling panel for use in the management of breast cancer treatment
- S3855Genetic testing for detection of mutations in the presenilin - 1 geneterminated
- S3861Genetic testing, sodium channel, voltage-gated, type v, alpha subunit (scn5a) and variants for suspected brugada syndrome
- S3865Comprehensive gene sequence analysis for hypertrophic cardiomyopathy
- S3870Comparative genomic hybridization (cgh) microarray testing for developmental delay, autism spectrum disorder and/or intellectual disability
- S3890Dna analysis, fecal, for colorectal cancer screeningterminated
- S3900Surface electromyography (emg)
- S3902Ballistocardiogram
- S3904Masters two step
- S4005Interim labor facility global (labor occurring but not resulting in delivery)
- S4011In vitro fertilization; including but not limited to identification and incubation of mature oocytes, fertilization with sperm, incubation of embryo(s), and subsequent visualization for determination of development
- S4013Complete cycle, gamete intrafallopian transfer (gift), case rate