CLIA lookup
CLIA Labs in Massachusetts
Every lab with an active CLIA certificate in Massachusetts, by city.
5,319 labs in Massachusetts hold an active CLIA certificate in the CMS file posted October 16, 2026.
4,367 of them hold a Certificate of Waiver.
Source: CMS Provider of Services File, Clinical Laboratories (CLIA), as of October 16, 2026. Publisher page
License: a US government work, in the public domain (Public Domain Mark 1.0).
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Certificates in Massachusetts
- Certificate of Waiver
- 4,367
- Certificate for Provider-Performed Microscopy Procedures
- 396
- Certificate of Accreditation
- 267
- Certificate of Compliance
- 254
- Certificate of Registration
- 35
Source: CMS Provider of Services File, Clinical Laboratories (CLIA), as of October 16, 2026. Publisher page
By city
- Boston245 active labs
- Worcester221 active labs
- Springfield128 active labs
- Fall River102 active labs
- Brockton93 active labs
- Cambridge88 active labs
- Framingham86 active labs
- Waltham66 active labs
- Plymouth65 active labs
- Quincy64 active labs
- Lowell61 active labs
- Newton59 active labs
- Wellesley59 active labs
- Woburn59 active labs
- Beverly56 active labs
- Brookline56 active labs
- Holyoke53 active labs
- Pittsfield51 active labs
- Leominster49 active labs
- North Andover49 active labs
- Lawrence48 active labs
- Marlborough47 active labs
- Weymouth46 active labs
- New Bedford45 active labs
- Peabody45 active labs
- Danvers44 active labs
- Northampton44 active labs
- Norwood44 active labs
- Braintree43 active labs
- Lynn43 active labs
- Milford43 active labs
- Chelmsford41 active labs
- Haverhill40 active labs
- Medford40 active labs
- Taunton40 active labs
- Needham39 active labs
- West Springfield38 active labs
- Concord37 active labs
- Dorchester37 active labs
- Methuen37 active labs
- Hyannis36 active labs
- Newburyport35 active labs
- Watertown35 active labs
- Attleboro34 active labs
- Burlington34 active labs
- Fitchburg34 active labs
- Natick32 active labs
- Dedham31 active labs
- Lexington31 active labs
- Gardner30 active labs
- Stoughton30 active labs
- Greenfield29 active labs
- North Dartmouth28 active labs
- Andover27 active labs
- Chicopee27 active labs
- Salem27 active labs
- Wilmington26 active labs
- Falmouth25 active labs
- Franklin25 active labs
- Stoneham25 active labs
- Canton24 active labs
- Dartmouth24 active labs
- Westborough24 active labs
- Chestnut Hill23 active labs
- Tewksbury23 active labs
- Brighton22 active labs
- Chelsea22 active labs
- Westfield22 active labs
- Gloucester21 active labs
- Shrewsbury21 active labs
- Winchester21 active labs
- Arlington20 active labs
- Bedford20 active labs
- Mashpee20 active labs
- Acton19 active labs
- Auburn19 active labs
- Hingham19 active labs
- Jamaica Plain19 active labs
- Melrose19 active labs
- Wakefield19 active labs
- Amherst18 active labs
- Norwell18 active labs
- Southborough18 active labs
- Swansea18 active labs
- Westford18 active labs
- East Longmeadow17 active labs
- Longmeadow17 active labs
- North Adams17 active labs
- Sandwich17 active labs
- Sudbury17 active labs
- Wareham17 active labs
- Webster17 active labs
- Agawam16 active labs
- Great Barrington16 active labs
- Malden16 active labs
- Raynham16 active labs
- Revere16 active labs
- Southbridge16 active labs
- Billerica15 active labs
- Fairhaven15 active labs
- Foxborough15 active labs
- Hopkinton15 active labs
- North Attleboro15 active labs
- West Roxbury15 active labs
- Lenox14 active labs
- Randolph14 active labs
- Walpole14 active labs
- Weston14 active labs
- Bridgewater13 active labs
- Dracut13 active labs
- Hanover13 active labs
- Milton13 active labs
- North Chelmsford13 active labs
- North Reading13 active labs
- Northborough13 active labs
- Pembroke13 active labs
- Roxbury13 active labs
- Saugus13 active labs
- Somerville13 active labs
- Westwood13 active labs
- Hudson12 active labs
- Ludlow12 active labs
- Palmer12 active labs
- Athol11 active labs
- Cohasset11 active labs
- Hyde Park11 active labs
- Mansfield11 active labs
- North Easton11 active labs
- South Hadley11 active labs
- South Weymouth11 active labs
- Spencer11 active labs
- Sturbridge11 active labs
- Wellesley Hills11 active labs
- Wrentham11 active labs
- Amesbury10 active labs
- Duxbury10 active labs
- Foxboro10 active labs
- Medway10 active labs
- Plainville10 active labs
- Reading10 active labs
- Somerset10 active labs
- South Yarmouth10 active labs
- Wayland10 active labs
- Wilbraham10 active labs
- Charlton9 active labs
- Easton9 active labs
- Groton9 active labs
- Hadley9 active labs
- Harwich9 active labs
- Holden9 active labs
- Marlboro9 active labs
- Westport9 active labs
- Ayer8 active labs
- Belchertown8 active labs
- Belmont8 active labs
- Bourne8 active labs
- Charlestown8 active labs
- Everett8 active labs
- Marshfield8 active labs
- Medfield8 active labs
- Middleton8 active labs
- Nantucket8 active labs
- Norton8 active labs
- West Yarmouth8 active labs
- Williamstown8 active labs
- Abington7 active labs
- Bellingham7 active labs
- Brewster7 active labs
- Easthampton7 active labs
- Holliston7 active labs
- Lakeville7 active labs
- Marblehead7 active labs
- Middleboro7 active labs
- Roslindale7 active labs
- Scituate7 active labs
- Seekonk7 active labs
- Sharon7 active labs
- Ware7 active labs
- West Boylston7 active labs
- West Bridgewater7 active labs
- Ashland6 active labs
- Baldwinville6 active labs
- Buzzards Bay6 active labs
- East Bridgewater6 active labs
- Harvard6 active labs
- Hopedale6 active labs
- Kingston6 active labs
- Leicester6 active labs
- Littleton6 active labs
- Lynnfield6 active labs
- Marion6 active labs
- Millbury6 active labs
- Norfolk6 active labs
- Northbridge6 active labs
- Orleans6 active labs
- Osterville6 active labs
- Provincetown6 active labs
- Whitman6 active labs
- Boxford5 active labs
- Centerville5 active labs
- Clinton5 active labs
- Devens5 active labs
- Dover5 active labs
- Feeding Hills5 active labs
- Florence5 active labs
- Lincoln5 active labs
- Millis5 active labs
- North Falmouth5 active labs
- Sterling5 active labs
- Sutton5 active labs
- Tyngsboro5 active labs
- Upton5 active labs
- Westminster5 active labs
- Whitinsville5 active labs
- Winchendon5 active labs
- Winthrop5 active labs
- Adams4 active labs
- Allston4 active labs
- Avon4 active labs
- Becket4 active labs
- Carver4 active labs
- Dalton4 active labs
- Dudley4 active labs
- East Boston4 active labs
- East Falmouth4 active labs
- East Sandwich4 active labs
- Edgartown4 active labs
- Lancaster4 active labs
- Lunenburg4 active labs
- Mattapan4 active labs
- Maynard4 active labs
- Middleborough4 active labs
- North Grafton4 active labs
- Northboro4 active labs
- Oak Bluffs4 active labs
- Orange4 active labs
- Rockland4 active labs
- Southampton4 active labs
- Stockbridge4 active labs
- Swampscott4 active labs
- Uxbridge4 active labs
- Vineyard Haven4 active labs
- West Concord4 active labs
- Westboro4 active labs
- Yarmouth Port4 active labs
- Ashburnham3 active labs
- Auburndale3 active labs
- Barre3 active labs
- Bolton3 active labs
- Bradford3 active labs
- Byfield3 active labs
- Chatham3 active labs
- Deerfield3 active labs
- Douglas3 active labs
- Georgetown3 active labs
- Grafton3 active labs
- Granby3 active labs
- Halifax3 active labs
- Hampden3 active labs
- Hathorne3 active labs
- Hinsdale3 active labs
- Holbrook3 active labs
- Ipswich3 active labs
- Lee3 active labs
- Leeds3 active labs
- Mattapoisett3 active labs
- North Billerica3 active labs
- North Chatham3 active labs
- North Dighton3 active labs
- Rochdale3 active labs
- Rochester3 active labs
- Rowley3 active labs
- Salisbury3 active labs
- Sandisfield3 active labs
- South Deerfield3 active labs
- South Dennis3 active labs
- South Hamilton3 active labs
- Teaticket3 active labs
- Topsfield3 active labs
- Wenham3 active labs
- West Brookfield3 active labs
- Acushnet2 active labs
- Ashby2 active labs
- Barnstable2 active labs
- Berkley2 active labs
- Blackstone2 active labs
- Boylston2 active labs
- Carlisle2 active labs
- Charlemont2 active labs
- E Bridgewater2 active labs
- East Freetown2 active labs
- East Walpole2 active labs
- Forestdale2 active labs
- Hanson2 active labs
- Hull2 active labs
- Huntington2 active labs
- Lanesboro2 active labs
- Manchester By The Sea2 active labs
- Mendon2 active labs
- N Easton2 active labs
- Newton Center2 active labs
- Newton Centre2 active labs
- North Brookfield2 active labs
- North Oxford2 active labs
- North Quincy2 active labs
- Northfield2 active labs
- Otis2 active labs
- Paxton2 active labs
- Pepperell2 active labs
- Pocasset2 active labs
- Rehoboth2 active labs
- Shelburne Falls2 active labs
- Shirley2 active labs
- South Attleboro2 active labs
- South Boston2 active labs
- Southfield2 active labs
- Southwick2 active labs
- Townsend2 active labs
- Turners Falls2 active labs
- W Springfield2 active labs
- Wellfleet2 active labs
- West Newbury2 active labs
- West Newton2 active labs
- Westhampton2 active labs
- Williamsburg2 active labs
- Worthington2 active labs
- Aquinnah1 active lab
- Assonet1 active lab
- Babson Park1 active lab
- Baystate Medical1 active lab
- Boxborough1 active lab
- Brimfield1 active lab
- Brookfield1 active lab
- Cataumet1 active lab
- Charlton City1 active lab
- Chesterfield1 active lab
- Chilmark1 active lab
- Colrain1 active lab
- Cotuit1 active lab
- Cummington1 active lab
- Dennis1 active lab
- Dighton1 active lab
- E Falmouth1 active lab
- E Longmeadow1 active lab
- East Brookfield1 active lab
- East Otis1 active lab
- East Wareham1 active lab
- Eastham1 active lab
- Edgemere1 active lab
- Erving1 active lab
- Essex1 active lab
- Fiskdale1 active lab
- Gilbertville1 active lab
- Goshen1 active lab
- Granville1 active lab
- Groveland1 active lab
- Gt Barrington1 active lab
- Hardwick1 active lab
- Hatfield1 active lab
- Holland1 active lab
- Housatonic1 active lab
- Hubbardston1 active lab
- Indian Orchard1 active lab
- Jefferson1 active lab
- Lahey Clinic Med Ctr1 active lab
- Lanesborough1 active lab
- Manchester1 active lab
- Merrimac1 active lab
- Millville1 active lab
- Monson1 active lab
- Montague1 active lab
- Mount Hermon1 active lab
- N Andover1 active lab
- N Chelmsford1 active lab
- N Falmouth1 active lab
- Nahant1 active lab
- Needham Heights1 active lab
- New Marlborough1 active lab
- Newbury1 active lab
- Newton Highlands1 active lab
- Newton Lower Falls1 active lab
- Newton Upper Falls1 active lab
- No Adams1 active lab
- No Attleboro1 active lab
- No Easton1 active lab
- North Truro1 active lab
- Oxford1 active lab
- Peru1 active lab
- Phillipston1 active lab
- Plympton1 active lab
- Prides Crossing1 active lab
- Princeton1 active lab
- Richmond1 active lab
- Rockport1 active lab
- Rowe1 active lab
- Rutland1 active lab
- Sagamore Beach1 active lab
- Sheffield1 active lab
- Shelburne1 active lab
- Sherborn1 active lab
- South Dartmouth1 active lab
- South Easton1 active lab
- South Egremont1 active lab
- Tolland1 active lab
- Truro1 active lab
- Tyngsborough1 active lab
- W Concord1 active lab
- W Falmouth1 active lab
- W Yarmouth1 active lab
- Warren1 active lab
- West Barnstable1 active lab
- West Dennis1 active lab
- West Stockbridge1 active lab
- West Tisbury1 active lab
- Windsor1 active lab
Related
Questions
How many CLIA labs are in Massachusetts?
5,319 labs in Massachusetts hold an active CLIA certificate in the CMS file posted October 16, 2026.
How many Massachusetts labs have a Certificate of Waiver?
4,367 of the 5,319 active labs in Massachusetts hold a Certificate of Waiver.
What does a CLIA number look like?
Ten characters: two digits, the letter D, then seven digits (for example 45D2100035). CMS assigns one to each laboratory certificate under the Clinical Laboratory Improvement Amendments.