Bindinglaw

US · guidance

CMS SOM App. C, Tag D3043

§493.1105 Standard: Retention requirements

activein force · 2026-07-22 – presentas-observed

(a)(7) Slide, block, and tissue retention--

(a)(7)(i) Slides.

(a)(7)(i)(A) Retain cytology slide preparations for at least 5 years from the date of

examination (see §493.1274(f) for proficiency testing exception).

Interpretive Guidelines §493.1105(a)(7)(i)(A)

For storage and maintenance requirements use D3013.

NOTE: Cytology specimens include fine needle aspirates.

Retention of cytology slides:

Example:

A laboratory refers all cytology specimens to a reference laboratory for examination. The

reference laboratory examines all slide preparations and reports results only on normal,

negative, and unsatisfactory cases. At the request of the referring laboratory, the

reference laboratory returns those cases that have reactive, reparative atypia (including

repair), LSIL, HSIL, all invasive squamous carcinomas, adenocarcinoma, all other

malignant neoplasms, and 10% of the normal or negatives cases (including reactive and

reparative cases) for quality control review. The referring laboratory must maintain the

slides of the cases that it examines and for which it provides diagnosis (i.e., slides

exhibiting atypical including repair, LSIL, HSIL, all invasive squamous carcinomas,

adenocarcinoma, all other malignant neoplasms, and slides chosen for the 10% rescreen).

The laboratory must maintain documentation to acknowledge the donation of each slide

submitted to a proficiency testing program or loaned for other purposes.

Probes §493.1105(a)(7)(i)(A)

What protocol has been established to ensure prompt return of slides, when necessary?

(a)(7)(i)(B) Retain histopathology slides for at least 10 years from the date of

examination.

(a)(7)(ii) Blocks. Retain pathology specimen blocks for at least 2 years from the date

of examination.

(a)(7)(iii) Tissue. Preserve remnants of tissue for pathology examination until a

diagnosis is made on the specimen.

History

Rev. 233; Issued: 09-12-25; Effective: 09-12-25; Implementation: 09-12-25

Provenance

Source
cms.gov
Retrieved
2026-07-22
Edition
som-2026-07-22
Content hash
ddf8c93ee2b36ecbd1ad0182c3d6045221d95e694357d35cc6809491793a729d
View the official source →

The link goes to the issuing authority’s own document — the one we read to produce this record. Where a source publishes whole titles rather than sections, your browser may need a moment to jump to the provision.

Unofficial copy of government-published law, reproduced from official sources with full provenance. Not an official publication; verify against official sources before relying on it in a filing. Records in the 'guidance' corpus, and only that corpus, are sub-regulatory (interpretive guidelines, survey procedures) and are not binding law. Validity bounds follow each jurisdiction's declared temporalBasis.

Coverage · API docs

Bindinglaw

Point-in-time US law with the receipt attached. Source URL, retrieval time, content hash, and validity dates on every answer.

curl api.binding.law/v1/law/coverage

© 2026 binding.law · a Jubal, Inc. productAttorneys and firms never pay. Ever.
CMS SOM App. C, Tag D3043 — §493.1105 Standard: Reten… · binding.law