CLIA Lab Director Requirements
Since December 28, 2024 the director of a nonwaived CLIA lab needs more than a medical license: set qualification paths, CE hours in director duties, two documented site visits a year and no more than five labs. Here is what 42 CFR 493 asks at each complexity level, what CMS has said it will not enforce, and what an October 2026 proposal would change.
Which rule applies to your lab
The highest test complexity on your menu sets the bar for the director. One moderate complexity test lifts a waived lab to § 493.1405; one high complexity test lifts it to § 493.1443.
- Certificate of waiverA director is required, but there are no federal education or experience qualifications.CMS
- PPM proceduresA physician, a midlevel practitioner authorized by the State to practice independently, or a dentist.§ 493.1357
- Moderate complexityFive paths, from a board-certified pathologist to a bachelor's degree with supervisory years, plus a grandfather paragraph.§ 493.1405
- High complexityPhysician or doctoral paths only, plus a grandfather paragraph and an oral pathology route. No master's or bachelor's path.§ 493.1443
Every nonwaived path also needs a current State director license where the State issues one (paragraph (a) of each section). Waived-only labs: the certificate of waiver guide covers what that director signs for.
Moderate complexity: § 493.1405
Most physician office labs and small independent labs sit here. A director needs one of these paths, read from the rule as amended by the December 2023 final rule, whose personnel changes took effect on December 28, 2024.
- (b)(1)MD or DO licensed in your StateCertified in anatomic or clinical pathology, or both, by the American Board of Pathology or the American Osteopathic Board of Pathology.
- (b)(2)MD, DO or DPM licensed in your State“At least 1 year directing or supervising nonwaived laboratory testing” and “at least 20 CE credit hours” in laboratory practice that cover the director responsibilities in § 493.1407.
- (b)(3)Earned doctoral degree in a chemical, biological, clinical or medical laboratory science or medical technology (or another doctorate that meets the coursework or thesis route)Certified by an HHS-approved board, at least 1 year directing or supervising nonwaived testing, and 20 CE credit hours.
- (b)(4)Master's degree in one of those sciences (or the master's equivalency)1 year of laboratory training or experience in nonwaived testing, 1 year of supervisory experience in nonwaived testing, and 20 CE credit hours.
- (b)(5)Bachelor's degree in one of those sciences (or 120 semester hours that meet the science mix)2 years of laboratory training or experience in nonwaived testing, 2 years of supervisory experience in nonwaived testing, and 20 CE credit hours.
- (b)(6)A director already in postQualified and serving as a moderate complexity director in a CLIA-certified lab “as of December 28, 2024, and have done so continuously since”.
The CE hours are a defined thing. § 493.2 counts “either continuing medical education (CME) or continuing education units (CEUs)”; they “must cover the applicable laboratory director responsibilities and be obtained prior to qualifying as a laboratory director.” Hours in your own clinical specialty do not meet that test unless they cover the director's duties.
The experience has to come from a real lab too: training, experience and supervising years count only when gained in a facility that meets CLIA's definition of a laboratory and is not excepted under § 493.3.
High complexity: § 493.1443
The bar narrows to physicians and doctoral scientists. There is no master's or bachelor's path, and the experience doubles to two years of directing or supervising high complexity testing.
- (b)(1)MD or DO licensed in your StateCertified in anatomic or clinical pathology, or both, by the American Board of Pathology or the American Osteopathic Board of Pathology.
- (b)(2)MD, DO or DPM licensed in your State“at least 2 years of experience directing or supervising high complexity testing” and at least 20 CE credit hours covering the director responsibilities in § 493.1445.
- (b)(3)Earned doctoral degree in a laboratory science (or another doctorate that meets the coursework or thesis route)Certified by an HHS-approved board, at least 2 years of laboratory training or experience and of directing or supervising high complexity testing, and 20 CE credit hours.
- (b)(4)A director already in postQualified and serving as a high complexity director in a CLIA-certified lab “as of December 28, 2024”, and continuously since.
- (b)(5)Oral pathology onlyCertified by the American Board of Oral Pathology, the American Board of Pathology or the American Osteopathic Board of Pathology.
“Doctoral degree” has its own meaning in § 493.2: a post-baccalaureate degree with at least 3 years of graduate study that includes research related to clinical laboratory testing or advanced study in a laboratory science. MD, DO, DPM and DVM degrees do not count as doctoral degrees for these paths, which is why physicians have their own (b)(1) and (b)(2).
Takeaway
What CMS is not enforcing today
The 2024 paths drew pushback from labs, mostly about the extra 20 CE hours and experience. On 23 June 2025 CMS told state survey agencies, in memo QSO-25-21-CLIA, that it would use enforcement discretion while it rewrites the rule:
- Physicians qualifying under § 493.1405(b)(2) may have either the 1 year of directing or supervising nonwaived testing or the 20 CE hours, rather than both.
- The additional 20 CE hours are not required on the doctoral, master's and bachelor's moderate paths, or on the high complexity physician and doctoral paths. CMS adds that anyone previously qualified as a clinical consultant continues to qualify without them.
- People qualified as technical supervisors under § 493.1449(f)(2)(i) may direct high complexity labs for dermatopathology testing.
The memo also clarifies two readings: the thesis or research project in the doctoral and master's equivalency routes “does not need to be on human subjects”, and the high complexity doctoral path needs “a total of two, not four,” years of training or experience and directing or supervising.
The rule text has not changed
Discretion is a statement of what surveyors will not cite; the eCFR text above still reads as written. The memo is addressed to state survey agencies. If your lab holds a certificate of accreditation, ask your accreditation organization how it applies it.
HHS-approved certification boards
The doctoral paths, § 493.1405(b)(3) and § 493.1443(b)(3), need certification by a board approved by HHS, kept current. CMS publishes the list; it has 10 entries. Pathologists on the (b)(1) path are certified by the boards named in the rule itself.
| Abbreviation | Board or certification |
|---|---|
| ABB | American Board of Bioanalysis |
| ABB | Public Health Microbiology certification |
| ABCC | American Board of Clinical Chemistry |
| ABFT | American Board of Forensic Toxicology |
| ABMGG | American Board of Medical Genetics and Genomics |
| ABMLI | American Board of Medical Laboratory Immunology |
| ABMM | American Board of Medical Microbiology |
| ACHI | American College of Histocompatibility and Immunogenetics |
| DMLI | Diplomate in Medical Laboratory Immunology |
| NRCC | National Registry of Certified Chemists |
Source: CMS, HHS-Approved Certification Boards, read 23 October 2026. The rule points to the list rather than naming boards, so check the CMS file before relying on one.
The on-site visit rule
Be onsite at least once every 6 months, with at least 4 months between the minimum two on-site visits.
The same words sit in § 493.1445(c) for high complexity. The 2023 rule added them; before that, a director only had to be accessible to the lab as needed. Two things go with each visit: the director must stay reachable by phone or electronically between visits, and must document the visits, “including evidence of performing activities that are part of the laboratory director responsibilities.”
In practice: a director who comes in March and September meets the spacing; March and May does not leave four months between the two. A sign-in sheet alone is thin evidence. Keep what was done on the day: the QC and PT reviews signed, the procedures approved, the competency files read.
CMS's director brochure lists the visit among the duties a director “cannot delegate” to other staff. A PPM director has no on-site paragraph in § 493.1359, and a waived lab's director has none at all.
How many labs one director may lead
Any number
of labs where the same person serves as technical consultant, technical supervisor or clinical consultant
“Each individual may direct no more than five laboratories”, in identical words at § 493.1407(d) and § 493.1445(d), and PPM directors carry the same cap at § 493.1359(a). CMS reads it as five nonwaived CLIA-certified labs: “If your laboratories only perform waived tests, there is no limit to how many laboratories you can direct.”
The count follows CLIA certificates: a group with six separately certified nonwaived sites needs a second director for the sixth. Consulting roles sit outside the cap, which is how one pathologist can be technical consultant to many practices while directing only a few.
What the director is responsible for
The director answers for “the overall operation and administration of the laboratory”. The list under paragraph (e) is the same at both levels, with one extra line at high complexity that shifts the numbering.
| The director must ensure | § 493.1407 | § 493.1445 |
|---|---|---|
| Test systems give quality results across the preanalytic, analytic and postanalytic phases | (e)(1) | (e)(1) |
| Physical plant and environment fit the testing, and staff are protected from hazards | (e)(2) | (e)(2) |
| Methods chosen are capable, verification is adequate, staff run methods as required | (e)(3) | (e)(3) |
| Enrolled in HHS-approved PT; samples tested, returned on time, reports reviewed, corrective action followed | (e)(4) | (e)(4) |
| QC and quality assessment programs established and maintained | (e)(5) | (e)(5) |
| Acceptable analytical performance set and kept for each test system | (e)(6) | (e)(6) |
| Remedial action documented; results reported only when the system works | (e)(7) | (e)(7) |
| Reports carry what is needed for interpretation; consultation available to clients | (e)(8)–(9) | (e)(8)–(9) |
| A general supervisor on site for testing by staff qualified under § 493.1489(b)(5) | none | (e)(10) |
| Enough qualified staff, trained and proven before they test patient specimens | (e)(10)–(11) | (e)(11)–(12) |
| Competency policies, with remedial training or CE where needed | (e)(12) | (e)(13) |
| An approved procedure manual available to everyone in the testing process | (e)(13) | (e)(14) |
| Each person's duties in writing: which tests, what supervision, what review before reporting | (e)(14) | (e)(15) |
A qualified director may do the consultant, supervisor and testing work personally or hand it to people who meet those roles' qualifications (§ 493.1407(a)). Handing it over moves the work, not the answerability: “If the laboratory director reapportions performance of his or her responsibilities, he or she remains responsible for ensuring that all duties are properly performed.”
For a physician directing a practice lab, that comes down to signatures a surveyor can find: the procedure manual approved, the written duty list for each person, PT reports reviewed with any corrective action, QC and quality assessment reviewed at the interval your own procedures set (CMS notes the rules set no frequency), the visit records, and the competency policy.
Takeaway
Changing director
A new director is a change CMS must hear about within 30 days, whatever the certificate type (§ 493.39, § 493.51, § 493.53, § 493.63). CMS's own tip to directors: notify “your State Agency or Accreditation Organization within 30 days when there's a change in the laboratory director.”
Before the notice goes in, check which paragraph the incoming director qualifies under and keep the evidence in the personnel file: license, diploma or transcript, board certificate, CE certificates, and letters that document the directing or supervising years. The grandfather paragraph covers only someone who was serving as a director at that complexity in a CLIA-certified lab on December 28, 2024 and has served continuously since; a gap breaks it.
Takeaway
What the October 2026 proposal would change
Proposed, not law
CMS-3478-P was published on 8 October 2026; comments are due 7 December 2026. Nothing in it applies until a final rule is published. The paths and duties above are what a surveyor cites today.
The proposed rule revises personnel qualifications broadly. For directors it would:
- drop the on-site paragraphs in § 493.1407(c) and § 493.1445(c), so the director would again need only to be accessible to the lab as needed;
- turn the moderate complexity paths into experience or 20 CE hours, drop the HHS board certification on the doctoral path, and cut the bachelor's supervisory years from 2 to 1;
- at high complexity, ask physicians for 1 year rather than 2 of directing or supervising, or the CE hours, and count 1 year of laboratory training during residency or fellowship; drop board certification on the doctoral path;
- remove the “human-only” limit on qualifying research, and add a director route for Mohs surgeons;
- rescind the PPM director's competency duties in § 493.1359(c)(1)–(5) and (d).
Most of this would write the June 2025 enforcement discretion into the rule and go further. If you are hiring now, hire to today's text.
Consultants, supervisors and contract directors
The director can hold other roles too: a qualified director may act as technical consultant (§ 493.1411) at moderate complexity, or as technical supervisor, clinical consultant and general supervisor at high complexity. CMS answers “No” to whether each position needs a different person, as long as whoever fills it meets that position's qualifications.
Many practices cannot fill the technical roles in-house and buy them. Before signing, ask which (b) paragraph the director relies on, how the two on-site visits will be scheduled and documented, which duties are delegated in writing and to whom, and how many other labs the person already directs.
Takeaway