California CLIA Licensing and Certification Requirements

Any laboratory that tests human specimens in California, or ships California specimens elsewhere for testing, needs two credentials: a federal CLIA certificate and a separate California license or registration from the Department of Public Health’s Laboratory Field Services (LFS). California CLIA licensing and certification requirements sit on top of the federal baseline because CMS has approved the state’s program as “CLIA-exempt,” meaning California’s rules are treated as equal to or stricter than 42 CFR Part 493.¹ In practice that means tighter personnel rules, annual (not biennial) renewals, longer record retention for most categories, and a state license that a lab can lose even when its CLIA certificate is in good standing.²

Which Credential Your Lab Needs

The state credential you apply for depends on what you test.³

A lab performing only waived tests or provider-performed microscopy procedures applies for a California clinical laboratory registration, paired with a CLIA Certificate of Waiver or PPMP.
A lab performing moderate- or high-complexity testing needs a full California clinical laboratory license. Holding CLIA certification or accreditation from CAP, COLA, or The Joint Commission does not substitute for the state license.

The application package includes proof of CLIA certification, a test menu that lists each analyte and the instrument manufacturer, written policies that meet California’s operational standards, designation of a qualified laboratory director, and a personnel roster with qualification documentation for everyone who performs or supervises testing.

Fees, Renewal, and Reporting Changes

License fees scale with the lab’s annual volume of moderate- and high-complexity tests. For licenses expiring on or after January 1, 2026, the annual fee starts at $335 for a lab performing fewer than 2,001 tests and reaches $19,970 at the top of the schedule (up to 15 million tests). A lab handling between 100,001 and 500,000 tests pays $4,000. A 25 percent delinquency fee applies to late renewals.⁴

California requires annual renewal, unlike the two-year federal CLIA cycle. LFS sends electronic renewal notices 30 days before expiration. A lapsed license stops all testing until reinstatement is approved.⁵

Owners and directors must notify LFS within 30 days of any change in ownership, directorship, name, or location, including adding or removing owners or directors. Missing that notification can trigger administrative action up to and including suspension.⁶

Out-of-State Labs Testing California Specimens

California’s reach extends past its borders. A laboratory physically located outside California that performs moderate- or high-complexity testing on specimens originating in California must hold a California out-of-state clinical laboratory license.⁷ The application requires:

A Laboratory Personnel Report (LAB 116 OS) listing every person who performs or supervises testing on California specimens, with a qualification form (LAB 168 OS) for each. Individual California personnel licenses are not required for out-of-state staff, but they must meet California’s education minimums: a bachelor’s degree for high-complexity testing, an associate degree for moderate-complexity testing.
Projected volume for each analyte on California specimens over the first 12 months.
Proof of accreditation from a California-approved organization (CAP, COLA, or The Joint Commission), or a letter of acceptance from one of them.
A valid CLIA ID, or, for labs in another CLIA-exempt state such as New York, a copy of that state certificate.

Fees for out-of-state licenses are based on the estimated volume of California specimens rather than the lab’s total national volume, and the lab reimburses LFS for travel and per diem when on-site inspections occur.

Personnel Licensing

California licenses individual laboratory workers separately from the laboratory itself, and national certification alone does not grant California licensure.

Clinical Laboratory Scientists

A CLS applicant needs a bachelor’s degree with 16 semester hours in chemistry (including analytical and clinical chemistry), 16 semester hours in biological science (including microbiology, hematology, and immunology), and 3 semester hours in physics, math, or statistics. After the degree, the candidate completes at least one year of post-baccalaureate clinical training in an approved program, or one year of qualifying work experience performing high-complexity testing across hematology, chemistry, blood bank, and microbiology.⁸

The exam requirement is met by the ASCP MLS certification (since October 2002), the AAB Medical Technologist certification (since January 2003), or the AMT Medical Technologist certification (2014 and later versions only). Applicants also complete an online California quiz on state laboratory law. Starting January 1, 2026, CLS licenses renew every year, with continuing education completed in the 12 months before each renewal. The printed license may still show a two-year term while IT upgrades continue, but the annual renewal obligation controls.⁹

Laboratory Directors

A California clinical laboratory can only be directed by a licensed physician and surgeon, a licensed osteopath, or a licensed doctoral scientist. Acute care hospital laboratories require a board-certified pathologist; if a pathologist is not available, a bioanalyst may direct the lab, but a pathologist must remain accessible. No director may oversee more than five non-waived licensed laboratories at once.¹⁰

Phlebotomists and Cytotechnologists

Phlebotomists need California certification through LFS regardless of any national credential. Training programs must be LFS-approved and include a minimum of 40 hours of practical clinical instruction. A Certified Phlebotomy Technician I candidate must complete at least 50 venipunctures and 10 skin punctures during training and observe arterial punctures, then pass an exam from an approved certifying organization (ACA, AMT, ASCP, NCCT, or NHA).¹¹¹²

Cytotechnologists complete a 12-month CAAHEP-accredited program (or equivalent) and pass the ASCP cytotechnologist certification exam. An alternative route exists for candidates with five years of full-time clinical cytology experience in the past ten years, at least two of them supervised by a board-eligible pathologist.¹³

Unlicensed Staff

Unlicensed personnel cannot perform clinical laboratory tests or examinations. They may only work in a licensed clinical laboratory, not a registered one, and any pre- or post-analytical work such as specimen preparation must be under the direct supervision and control of a licensed person at all times.⁶

Inspections and Proficiency Testing

LFS inspects in-state licensed laboratories performing non-waived testing on a biennial cycle, and unannounced inspections are on the table as well. Surveyors need full access to testing areas, records, equipment, and personnel. They review standard operating procedures, calibration and maintenance logs, quality assurance programs, and specimen handling, and they confirm that results are documented and reported to ordering providers.¹⁴

Deficiencies produce a corrective action plan with a deadline and, usually, a follow-up inspection. CMS separately retains authority to conduct validation and complaint inspections of California’s CLIA-exempt labs during operating hours; when a federal survey finds condition-level noncompliance, enforcement runs through the state licensure program rather than through direct federal sanctions.²

Non-waived testing labs must also participate in a proficiency testing program approved by the department or by CMS. Failing two consecutive proficiency events for the same analyte forces the lab to stop testing that analyte until it passes two successive rounds.¹⁰

What Enforcement Looks Like

Under Business and Professions Code Section 1320, LFS can deny, suspend, or revoke a license or registration, subject to the procedural requirements of BPC Sections 1267 and 1322.¹⁵ Actions the department uses in practice include corrective action plans, civil monetary penalties (for example, operating without a valid license), suspension or revocation for serious violations such as falsified results or unauthorized personnel performing high-complexity testing, and, in extreme cases, misdemeanor prosecution by the California Attorney General’s Office. A lab can file a notice of defense and request an administrative hearing under the Government Code, and may seek judicial review of the final decision.

Recordkeeping Periods

California retention requirements are longer than federal CLIA for most record categories. Under BPC Section 1265(j)(2), test requisitions, test procedure records, quality control and patient test records, and test reports must be kept at least three years from the date of testing. That three-year state minimum overrides the shorter two-year CLIA period for those categories.¹⁶

Some records run longer. Immunohematology, blood product, and transfusion records must be preserved for 10 years, as must pathology test reports. Cytology slides and blocks must be kept for at least five years. In those categories the federal CLIA timelines are more stringent, so they control. Records must be available for inspection, and a lab that closes is still bound by the retention period.

Medi-Cal Reimbursement

Losing the state license also closes off reimbursement. Federal payment for laboratory services under Medicaid requires either a valid CLIA certificate or licensure by a state whose program CMS has approved as CLIA-exempt, so a revoked California license eliminates both state and federal payment eligibility.¹

Separately, the Department of Health Care Services (DHCS) requires certain clinical laboratory providers to submit third-party payer rate and utilization data every three years, which DHCS uses to set Medi-Cal lab reimbursement rates. For the July 1, 2026 rate cycle, providers submitted Calendar Year 2024 data. A lab that fails to provide requested data within 30 working days faces suspension from Medi-Cal.¹⁷

1
eCFR. 42 CFR Part 493 – Laboratory Requirements
2
CMS. QSO-25-10-CLIA Revised
3
CDPH – CA.gov. Clinical and Public Health Laboratories
4
California Department of Public Health. Fees – Laboratory Field Services
5
California Department of Public Health. Clinical Laboratory Improvement Amendments (CLIA)
6
California Department of Public Health. Issues Specific to California Clinical Laboratory Law
7
California Department of Public Health (CDPH). New Application – Out-of-State Clinical Laboratory License
8
CDPH – CA.gov. Clinical Laboratory Scientist License (CLS)
9
California Department of Public Health. Renewal of Clinical Laboratory Personnel Licenses and Certificates
10
California Department of Public Health (CDPH). Tutorial – Basic California State Laboratory Law
11
California Department of Public Health (CDPH). Phlebotomy Training Program Information
12
California Department of Public Health. List of Approved Certifying Organization Examinations
13
CDPH – CA.gov. Cytotechnologist License
14
California Legislative Information. Business and Professions Code – BPC Article 2 Administration and Regulation
15
New York Codes, Rules and Regulations. 17 CCR 1065.5 – Principal Sanctions
16
Cornell Law School. Cal Code Regs Tit 17, 1053 – Clinical Laboratory Improvement Amendments (CLIA) Record Retention Regulations Determined to be Less Stringent than California Law
17
DHCS – CA.gov. Clinical Laboratory or Laboratory Services