WSLH Proficiency Testing
WSLH Proficiency Testing, a division of the Wisconsin State Laboratory of Hygiene, provides CMS-approved clinical and environmental proficiency testing programs to CLIA-regulated U.S. laboratories, with annual enrollment, online PT Central portals, training, and calibration verification services.
- Company typePrivate
- Founded1966
- HeadquartersMadison, United States
- Headcount11–50
- GTM typeB2B
- OfferingServices
What WSLH Proficiency Testing does
WSLH Proficiency Testing is a Madison, Wisconsin-based division of the Wisconsin State Laboratory of Hygiene and an affiliate of the University of Wisconsin-Madison School of Medicine and Public Health, founded in 1966 to provide clinical laboratory proficiency testing services in the United States. The company delivers scheduled proficiency testing events covering chemistry, hematology, immunology, microbiology, blood bank, toxicology, endocrinology, and specialty analytes, supplemented by environmental proficiency testing for Legionella and other analytes. It is approved by CMS under CLIA and accepted by CAP, COLA, and The Joint Commission, allowing it to transmit scores that satisfy mandatory regulatory compliance for enrolled clinical laboratories. Its digital platform, PT Central, provides online portals for clinical and environmental customers to access worksheets, submit results, and retrieve evaluation reports, with a stated industry-leading 14-day average evaluation turnaround.
The company's revenue mechanics are anchored in annual recurring subscription enrollment in PT programs, with one-time fees for off-schedule, pre-licensure, and remediation samples; assyed sample sets for HIV and Blood Lead; and bundled professional services including MTS Training & Competency CE courses and AUDIT calibration verification products. GTM combines inside sales via phone/email, self-serve online ordering through PT Central, quote-based pricing, and event-driven demand generation through active participation at major laboratory conferences (ADLM, COLA, ASM Microbe, ASCLS, AABB). The customer base is the long tail of CLIA-regulated clinical laboratories in the United States, with a smaller environmental testing laboratory cohort, and no enterprise anchor accounts or public revenue figures are disclosed. Recent strategic emphasis has centered on adapting to CLIA 2025 regulatory revisions effective January 1, 2025, launching a Post Event Troubleshooting Hub in December 2025, and opening 2026 enrollment programs.
WSLH Proficiency Testing firmographics
Firmographics- Name
- WSLH Proficiency Testing
- Legal name
- WSLH Proficiency Testing (Division of the Wisconsin State Laboratory of Hygiene, University of Wisconsin-Madison)
- Website
- https://wslhpt.org
- Company type
- Private
- Founded year
- 1966
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- WSLH Proficiency Testing, a division of the Wisconsin State Laboratory of Hygiene, provides CMS-approved clinical and environmental proficiency testing programs to CLIA-regulated U.S. laboratories, with annual enrollment, online PT Central portals, training, and calibration verification services.
- Ownership category
- akta.pro rank
WSLH Proficiency Testing industry classification
Industry- Product category
- Clinical Laboratory Proficiency Testing
- NAICS
- Medical Laboratories (621511)
- SIC
- Services-Medical Laboratories (8071)
- akta.pro primary industry
- Toxicology & Therapeutic Drug Monitoring Laboratories (HLAFAMAF)
- akta.pro secondary industry
- Drug-of-Abuse & Toxicology Rapid Tests (Urine/saliva panels) (HLAHAOAG)
Keywords
Where WSLH Proficiency Testing is headquartered
LocationHeadquarters
- HQ city
- Madison
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
WSLH Proficiency Testing business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Supply Chain
Revenue model
- Clinical Proficiency Testing Programs: Annual enrollment in regularly scheduled proficiency testing events for clinical laboratories covering a wide range of analytes in chemistry, hematology, immunology, microbiology, and other specialties. Provides evaluation reports and score transmission to regulatory bodies.
- Off-Schedule and Pre-licensure Samples: Replacement samples, off-cycle testing, and evaluation samples for remediation, cease testing, or CLIA license acquisition. Includes evaluation report and score transmission when applicable.
- Assayed Sample Sets: Peer-tested samples with corresponding acceptable results and ranges for internal self-evaluation. Used for validation studies, troubleshooting, competency assessment, and training. Does not include evaluation report or score transmission.
- Training and Competency Programs: MTS Training & Competency programs and CE courses for laboratory staff professional development, bundled alongside annual PT programs.
- AUDIT Calibration Verification: Calibration verification products and services for laboratory quality assurance compliance.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Annual | Quote-based pricing for all proficiency testing programs |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels6 records
WSLH Proficiency Testing product offering
Product offeringCore offering
WSLH Proficiency Testing provides scheduled clinical and environmental proficiency testing programs, off-schedule and pre-licensure remediation samples, calibration verification products, assayed sample sets, and competency training for clinical laboratories. Enrolled laboratories submit results through the PT Central online portal and receive evaluation reports with score transmission to regulatory bodies. The offering is structured around annual enrollment in recurring PT events covering chemistry, hematology, immunology, microbiology, blood bank, and environmental analytes.
Product overview
WSLH Proficiency Testing provides a modular proficiency testing platform with core clinical and environmental PT programs supplemented by online portals, add-on sample services, training resources, and troubleshooting tools. The flagship offering consists of Clinical PT Central and Environmental PT Central online platforms where laboratories access worksheets, submit results, and retrieve evaluations. Core PT programs include scheduled proficiency testing events across chemistry, hematology, immunology, microbiology, and blood bank specialties, with optional off-schedule samples for remediation or licensing. Supporting offerings include MTS Training & Competency courses, Calibration Verification products, Assayed Sample Sets for HIV and Blood Lead, the Post Event Troubleshooting Hub with interactive guides and worksheets, and The MedLab Retriever monthly newsletter.
Differentiator
Problem solved
Functional benefit
Brands
- The MedLab Retriever: Monthly newsletter of WSLH PT delivering clinical lab news, features, and updates.
Products and services
- Clinical Proficiency Testing Programs Regularly scheduled annual proficiency testing events covering clinical chemistry, hematology, immunology, microbiology, blood bank, and other laboratory specialties to meet CLIA regulatory requirements. Includes 3-sample or 5-sample PT modules per CLIA 2025 requirements, evaluation reports, and score transmission to regulatory bodies.
- Legionella and Environmental Proficiency Testing Environmental proficiency testing programs for Legionella detection and other environmental sample analysis, accessed through Environmental PT Central. For laboratories performing environmental water testing and quality assurance.
- Off-Schedule and Pre-Licensure Samples Replacement samples, off-cycle testing, and evaluation samples for remediation, cease testing requirements, or CLIA license acquisition. Includes evaluation report and score transmission when applicable. For laboratories addressing PT failures or seeking new CLIA licensure.
- AUDIT Calibration Verification Linearity and calibration verification products to support laboratory quality assurance compliance requirements. For clinical laboratories meeting regulatory quality standards.
- Assayed Sample Sets Pre-assayed proficiency testing samples available for HIV and Blood Lead testing, providing peer-tested results and acceptable ranges for internal self-evaluation, validation studies, troubleshooting, competency assessment, and training. Does not include evaluation report or score transmission.
- MTS Training and Competency Programs Online training and competency programs for medical laboratory science (MLS) professionals, including continuing education courses. Bundled alongside annual PT programs for laboratory staff professional development.
- Post Event Troubleshooting Hub Online troubleshooting platform with guides, worksheets, interactive tables, corrective action forms, and real-world examples to help laboratories investigate PT failures and not-scored results.
Quantifiable outcome
- 14-day average turnaround on proficiency testing evaluations
- +2 more outcomes
Companies that use WSLH Proficiency Testing
Customer profileSegments4 records
Ideal customer profiles3 records
WSLH Proficiency Testing technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
WSLH Proficiency Testing partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Wisconsin State Laboratory of HygienecoreWSLH Proficiency Testing is a division of the Wisconsin State Laboratory of Hygiene (WSLH), a public health laboratory. This affiliation provides access to public health expertise and infrastructure, and positions WSLH PT as the only proficiency testing provider affiliated with a public health lab.
Scale indicators2 records
Recent moves5 records
Expansion highlights5 records
WSLH Proficiency Testing competitors and assessment
Company assessmentDirect peers
- Association for Diagnostics & Laboratory Medicine (ADLM, formerly AACC): ADLM runs proficiency testing/survey programs targeting the same clinical laboratory professional audience as WSLH PT and is a competing destination for clinical labs' PT enrollment dollars.
- American Association of Bioanalysts (AAB): AAB provides clinical PT programs and is a smaller, specialized PT provider serving a similar CLIA-regulated clinical lab customer base as WSLH PT.
- College of American Pathologists (CAP): CAP runs one of the largest clinical proficiency testing programs in the US (and also acts as an accreditor that accepts PT results). It is the most direct large-scale competitor to WSLH PT for accredited clinical lab PT spend.
- AUDIT Microcontrols: AUDIT specializes in calibration verification and linearity materials for clinical labs, overlapping directly with WSLH PT's 'AUDIT Calibration Verification' product line and serving the same QA/compliance buyer.
- LGC Group (clinical PT services): LGC operates one of the world's largest proficiency testing networks across clinical and life-science testing, serving similar clinical and reference lab customers with PT schemes directly comparable to WSLH's offerings.
- BIO-RAD Laboratories (Unity Real-Time PT): BIO-RAD's Unity Real-Time program is one of the largest commercial clinical PT services globally, serving clinical labs with comprehensive PT and QC programs directly comparable to WSLH's offerings.
- American Proficiency Institute (API): API is a dedicated clinical laboratory proficiency testing provider offering PT programs across chemistry, hematology, immunology, microbiology and other specialties — a pure-play competitor to WSLH PT.
Broad incumbents
- Eurofins Scientific: Eurofins is a global lab testing network offering PT services alongside routine clinical and environmental testing, making it a broader incumbent competitor in the medical and environmental PT spaces WSLH PT serves.
- Siemens Healthineers (Laboratory Diagnostics): Siemens Healthineers supplies the diagnostic analyzers run by clinical labs and participates in the broader PT/QC ecosystem, serving the same lab customers as WSLH PT but as part of a much larger diagnostics portfolio.
Emerging players
- Maine Molecular Quality Controls (MMQCI): MMQCI focuses on molecular quality controls and PT for infectious disease and genetic testing, addressing a specialized adjacency where WSLH PT also offers molecular/microbiology PT modules.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
WSLH Proficiency Testing social profiles
Digital presenceWSLH Proficiency Testing compliance and trust
Trust signalCompliance4 records
WSLH Proficiency Testing financial estimates
Financial estimateRevenue estimate
Valuation estimate
WSLH Proficiency Testing leadership team
Management profileNumber of profiles
Profiles1 record
WSLH Proficiency Testing funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
WSLH Proficiency Testing M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about WSLH Proficiency Testing
What does WSLH Proficiency Testing do?
WSLH Proficiency Testing provides scheduled clinical and environmental proficiency testing programs, off-schedule and pre-licensure remediation samples, calibration verification products, assayed sample sets, and competency training for clinical laboratories. Enrolled laboratories submit results through the PT Central online portal and receive evaluation reports with score transmission to regulatory bodies. The offering is structured around annual enrollment in recurring PT events covering chemistry, hematology, immunology, microbiology, blood bank, and environmental analytes.
Is WSLH Proficiency Testing a public or private company?
WSLH Proficiency Testing is a private company. It is classified as state government owned and is currently operating.
When was WSLH Proficiency Testing founded?
WSLH Proficiency Testing was founded in 1966. It employs 11 to 50 people.
Where is WSLH Proficiency Testing based?
WSLH Proficiency Testing is headquartered in Madison, United States, in the North America region.
How does WSLH Proficiency Testing make money?
Five revenue lines are on record. Clinical Proficiency Testing Programs are the primary driver. The others are off-Schedule and Pre-licensure Samples, assayed Sample Sets, training and Competency Programs and AUDIT Calibration Verification.
Who are WSLH Proficiency Testing's main competitors?
Direct peers on record are Association for Diagnostics & Laboratory Medicine (ADLM, formerly AACC), American Association of Bioanalysts (AAB), College of American Pathologists (CAP), AUDIT Microcontrols, LGC Group (clinical PT services), BIO-RAD Laboratories (Unity Real-Time PT) and American Proficiency Institute (API). Broad incumbents are Eurofins Scientific and Siemens Healthineers (Laboratory Diagnostics). Maine Molecular Quality Controls (MMQCI) is listed as an emerging player.
Does WSLH Proficiency Testing have an API?
No public API is recorded for WSLH Proficiency Testing.
What industry is WSLH Proficiency Testing in?
WSLH Proficiency Testing's product category is Clinical Laboratory Proficiency Testing. Its primary akta.pro industry code is HLAFAMAF, Toxicology & Therapeutic Drug Monitoring Laboratories, with a secondary code of HLAHAOAG, Drug-of-Abuse & Toxicology Rapid Tests (Urine/saliva panels). Its NAICS code is 621511 and its SIC code is 8071.