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Nephronophthisis and Senior-Loken Syndrome Panel

Summary and Pricing

Test Method

Exome Sequencing with CNV Detection
Test Code Test Copy Genes Gene CPT Codes Copy CPT Codes
ANKS6 81479,81479
CEP164 81479,81479
CEP290 81408,81479
CEP83 81479,81479
DCDC2 81479,81479
GLIS2 81479,81479
INVS 81479,81479
IQCB1 81479,81479
NEK8 81479,81479
NPHP1 81406,81405
NPHP3 81479,81479
NPHP4 81479,81479
RPGRIP1L 81479,81479
SDCCAG8 81479,81479
TMEM67 81407,81479
TTC21B 81479,81479
WDR19 81479,81479
ZNF423 81479,81479
Test Code Test Copy Genes Panel CPT Code Gene CPT Codes Copy CPT Code Base Price
10341Genes x (18)81479 81405(x1), 81406(x1), 81407(x1), 81408(x1), 81479(x32) $990 Order Options and Pricing

Pricing Comments

We are happy to accommodate requests for testing single genes in this panel or a subset of these genes. The price will remain the list price. If desired, free reflex testing to remaining genes on panel is available. Alternatively, a single gene or subset of genes can also be ordered via our Custom Panel tool.

An additional 25% charge will be applied to STAT orders. STAT orders are prioritized throughout the testing process.

Click here for costs to reflex to whole PGxome (if original test is on PGxome Sequencing platform).

Click here for costs to reflex to whole PGnome (if original test is on PGnome Sequencing platform).

Turnaround Time

3 weeks on average for standard orders or 2 weeks on average for STAT orders.

Please note: Once the testing process begins, an Estimated Report Date (ERD) range will be displayed in the portal. This is the most accurate prediction of when your report will be complete and may differ from the average TAT published on our website. About 85% of our tests will be reported within or before the ERD range. We will notify you of significant delays or holds which will impact the ERD. Learn more about turnaround times here.

Targeted Testing

For ordering sequencing of targeted known variants, go to our Targeted Variants page.


Genetic Counselors


  • Angela Gruber, PhD

Clinical Features and Genetics

Clinical Features

Nephronophthisis (NPH) is the most common genetic cause of progressive renal failure in children and young adults. NPH is characterized by polyuria, growth retardation and progressive deterioration of renal function with normal or slightly reduced kidney size (Hildebrandt et al. 1997; Hildebrandt et al. 2009). Nephronophthisis, when associated with Leber Congenital Amaurosis, is known as Senior-Loken syndrome (SLS) (Otto et al. 2005; Hildebrandt et al. 2009). NPH clinical features overlap with a group of diseases known as ciliopathies, which includes Meckel-Gruber Syndrome, Joubert Syndrome, Bardet-Biedl Syndrome and Leber congenital amaurosis.


Nephronophthisis and Senior-Loken syndrome are genetically heterogeneous disorders. NPH and SLS are inherited in an autosomal recessive manner. NPH and SLS are caused by pathogenic variants in genes encoding proteins involved in cilia/centrosome structure, maintenance or function (Hildebrandt et al. 2009). See individual gene test descriptions for more information on molecular biology of gene products.

Clinical Sensitivity - Sequencing with CNV PGxome

Sensitivity for Nephronophthisis testing is approximately 30% overall (Hildebrandt et al. 2009). This NGS test can detect the ~279kb deletion in the NPHP1 gene if it is present in the homozygous state.

Approximately 20% of individuals with nephronophthisis have a homozygous deletion encompassing the NPHP1 gene (Hoefele et al 2005; Hildebrandt et al 2009). Gross deletions or duplications that may not be detectable by NGS have been reported in CEP290, NPHP1, TMEM67 and SDCCAG8 (Human Gene Mutation Database).

Testing Strategy

This test is performed using Next-Gen sequencing with additional Sanger sequencing as necessary.

This panel typically provides 99.4% coverage of all coding exons of the genes plus 10 bases of flanking noncoding DNA in all available transcripts along with other non-coding regions in which pathogenic variants have been identified at PreventionGenetics or reported elsewhere. We define coverage as ≥20X NGS reads or Sanger sequencing. PGnome panels typically provide slightly increased coverage over the PGxome equivalent. PGnome sequencing panels have the added benefit of additional analysis and reporting of deep intronic regions (where applicable).

Dependent on the sequencing backbone selected for this testing, discounted reflex testing to any other similar backbone-based test is available (i.e., PGxome panel to whole PGxome; PGnome panel to whole PGnome).

Indications for Test

This test is for patients with Nephronophthisis or Senior-Loken Syndrome.


Official Gene Symbol OMIM ID
ANKS6 615370
CEP164 614848
CEP290 610142
CEP83 615847
DCDC2 605755
GLIS2 608539
INVS 243305
IQCB1 609237
NEK8 609799
NPHP1 607100
NPHP3 608002
NPHP4 607215
RPGRIP1L 610937
SDCCAG8 613524
TMEM67 609884
TTC21B 612014
WDR19 608151
ZNF423 604557
Inheritance Abbreviation
Autosomal Dominant AD
Autosomal Recessive AR
X-Linked XL
Mitochondrial MT

Related Test



  • Hildebrandt et al. 1997. PubMed ID: 9326933
  • Hildebrandt F. et al. 2009. Journal of the American Society of Nephrology : Jasn. 20: 23-35. PubMed ID: 19118152
  • Hoefele Julia et al. 2005. Human Mutation. 25: 411-411 PubMed ID: 15776426
  • Human Gene Mutation Database (Bio-base).
  • Otto et al. 2005. PubMed ID: 15723066


Ordering Options

We offer several options when ordering sequencing tests. For more information on these options, see our Ordering Instructions page. To view available options, click on the Order Options button within the test description.

myPrevent - Online Ordering

  • The test can be added to your online orders in the Summary and Pricing section.
  • Once the test has been added log in to myPrevent to fill out an online requisition form.
  • PGnome sequencing panels can be ordered via the myPrevent portal only at this time.

Requisition Form

  • A completed requisition form must accompany all specimens.
  • Billing information along with specimen and shipping instructions are within the requisition form.
  • All testing must be ordered by a qualified healthcare provider.

For Requisition Forms, visit our Forms page

If ordering a Duo or Trio test, the proband and all comparator samples are required to initiate testing. If we do not receive all required samples for the test ordered within 21 days, we will convert the order to the most effective testing strategy with the samples available. Prior authorization and/or billing in place may be impacted by a change in test code.

Specimen Types

Specimen Requirements and Shipping Details

PGxome (Exome) Sequencing Panel

PGnome (Genome) Sequencing Panel

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View Ordering Instructions

1) Select Test Method (Platform)

1) Select Test Type

2) Select Additional Test Options

No Additional Test Options are available for this test.

Note: acceptable specimen types are whole blood and DNA from whole blood only.
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