Litigation intelligence · 50-state guide · Updated July 2026
Affidavit of Merit Requirements by State
Compiled from the NCSL 50-state survey and cited statutes · Statutes and case law change — verify current law in your jurisdiction. Informational only; not legal advice.
The bottom line: 28 states require some form of affidavit or certificate of merit before (or shortly after) filing a medical-malpractice case — meaning you need a qualified expert engaged before the lawsuit can survive. Four more states enacted requirements that their supreme courts struck down. Deadlines range from "filed with the complaint" to 120 days after each defendant answers.
The 50-state table
| State | Required? | What's required | When | Statute |
|---|---|---|---|---|
| Alabama | No | Expert-qualification standards only | — | Ala. Code §6-5-548 |
| Alaska | No | Expert-qualification standards only | — | Alaska Stat. §09.20.185 |
| Arizona | Yes | Certification whether expert testimony is needed; if so, preliminary expert opinion affidavit | With initial Rule 26.1 disclosures | A.R.S. §12-2603 |
| Arkansas | Struck down | Affidavit statute held unconstitutional (Summerville v. Thrower, 2007) | — | §16-114-209 |
| California | No | No merit-affidavit statute (emergency-care expert rules only) | — | — |
| Colorado | Yes | Attorney certificate of review — expert consulted, claim has substantial justification (all licensed professionals) | Within 60 days after service | C.R.S. §13-20-602 |
| Connecticut | Yes | Good-faith certificate + written opinion of a similar health care provider | Attached to complaint | C.G.S. §52-190a |
| Delaware | Yes | Expert-signed affidavit of merit + CV (filed under seal) | With complaint (one 60-day extension) | 18 Del. C. §6853 |
| D.C. | No | — | — | — |
| Florida | Yes | Counsel certificate + presuit verified written medical expert opinion | Certificate with pleading; expert opinion with notice of intent | Fla. Stat. §766.104, §766.203 |
| Georgia | Yes | Expert affidavit setting forth ≥1 negligent act with factual basis (26 professions) | With complaint (45-day SOL exception) | O.C.G.A. §9-11-9.1 |
| Hawaii | Yes | Certificate of physician consultation with inquiry to conciliation panel | With panel inquiry | HRS §671-12.5 |
| Idaho | No | Expert/community-standard rules only | — | Idaho Code §6-1012/13 |
| Illinois | Yes | Attorney consultation affidavit + reviewing health professional's written report | Attached to complaint | 735 ILCS 5/2-622 |
| Indiana | No | (Medical review panel system applies) | — | — |
| Iowa | Yes | Expert-signed certificate of merit affidavit per defendant | Within 60 days of defendant's answer | Iowa Code §147.140 |
| Kansas | No | — | — | — |
| Kentucky | Yes | Certificate of merit | Filed with complaint (60-day supplement) | KRS §411.167 |
| Louisiana | No | (Medical review panel system applies) | — | — |
| Maine | No | (Prelitigation screening panel applies) | — | — |
| Maryland | Yes | Certificate of qualified expert (defendant must file one too) | Within 90 days of complaint | Cts. & Jud. Proc. §3-2A-04 |
| Massachusetts | No | (Tribunal system applies) | — | — |
| Michigan | Yes | Affidavit of merit signed by health professional | Filed with complaint | MCL §600.2912d |
| Minnesota | Yes | Two affidavits: expert review + expert identification (noncompliance = dismissal with prejudice) | With complaint; ID affidavit within 180 days of discovery | Minn. Stat. §145.682 |
| Mississippi | Yes | Attorney certificate of expert consultation | With complaint (60-day supplement) | Miss. Code §11-1-58 |
| Missouri | Yes | Affidavit of written opinion from qualified provider, per defendant | Within 90 days of petition (+90 possible) | RSMo §538.225 |
| Montana | No | (Legal panel review applies) | — | — |
| Nebraska | No | — | — | — |
| Nevada | Yes | Expert supporting affidavit — dismissal if filed without | Must accompany complaint | NRS §41A.071 |
| New Hampshire | No | — | — | — |
| New Jersey | Yes | Affidavit of appropriate licensed person (reasonable probability of deviation) | Within 60 days of defendant's answer (+60 for good cause) | N.J.S.A. 2A:53A-27 |
| New Mexico | No | — | — | — |
| New York | Yes | Attorney certificate of consultation with knowledgeable physician | With complaint (90-day SOL exception) | CPLR §3012-a |
| North Carolina | No* | *Rule 9(j) pleading certification applies — verify current practice | — | — |
| North Dakota | Yes | Affidavit containing expert opinion | Within 3 months of commencement | N.D.C.C. §28-01-46 |
| Ohio | Yes | Affidavit(s) of merit per defendant needing expert testimony | With complaint (extensions available) | Civ.R. 10(D)(2); R.C. §2323.451 |
| Oklahoma | Struck down | Affidavit statute held unconstitutional (John v. Saint Francis Hosp., 2017) | — | 12 O.S. §19.1 |
| Oregon | No | — | — | — |
| Pennsylvania | Yes | Certificate of merit — licensed professional's written statement of probable deviation (all licensed professions) | With complaint or within 60 days | Pa. R.C.P. 1042.3 |
| Rhode Island | No | — | — | — |
| South Carolina | Yes | Expert affidavit (≥1 negligent act) + presuit Notice of Intent with expert affidavit | Contemporaneous with complaint | S.C. Code §15-36-100, §15-79-125 |
| South Dakota | No | — | — | — |
| Tennessee | Yes | Certificate of good faith | Filed with complaint | T.C.A. §29-26-122 |
| Texas | Yes | Expert report + CV served on each defendant | Within 120 days after each defendant's answer | CPRC §74.351 |
| Utah | Struck down | Affidavit statute held unconstitutional (Vega v. Jordan Valley Med. Ctr., 2019) | — | §78B-3-423 |
| Vermont | Yes | Certificate of merit — consultation with qualified provider | Simultaneous with complaint | 12 V.S.A. §1042 |
| Virginia | Yes | Certifying expert opinion obtained before service | At time service of process is requested | Va. Code §8.01-20.1 |
| Washington | Struck down | Certificate statute held unconstitutional (Putman v. Wenatchee Valley Med. Ctr., 2009) | — | RCW §7.70.150 |
| West Virginia | Yes | Presuit notice of claim + screening certificate of merit | ≥30 days before filing suit | W. Va. Code §55-7B-6 |
| Wisconsin | No | — | — | — |
| Wyoming | Yes | Presuit claim to medical review panel | Before filing complaint | Wyo. Stat. §9-2-1519 |
Primary source: NCSL, "Medical Liability/Malpractice Merit Affidavits and Expert Witnesses" (50-state survey), with cited statutes as listed. Several states without merit-affidavit statutes use review panels or tribunals instead (noted). Legislatures amend these statutes and courts revisit them — always verify current law before filing.
What the table means in practice
- The expert comes first, not last. In 28 states, a qualified expert must review the case — and in many, sign an affidavit — before or immediately after filing. Waiting to find your expert until discovery is a dismissal risk.
- Deadlines are unforgiving. Nevada, Michigan, Tennessee, and Georgia effectively require the expert at the courthouse door. Texas gives 120 days after each answer — with objections due 21 days after service. Minnesota punishes noncompliance with dismissal with prejudice.
- Some statutes reach beyond medicine. Colorado (§13-20-602), Pennsylvania (Rule 1042.3), and Georgia (§9-11-9.1) apply merit requirements to most or all licensed-professional negligence claims — engineers, accountants, architects, and attorneys included.
- Defendants have duties too. Maryland and Tennessee impose certificate requirements on defendants in specified circumstances; Florida requires corroboration of rejections.
Facing an affidavit deadline?
SwornIn matches your case to vetted experts in hours — with transparent credentials, Daubert history, and reliability scores — so the affidavit clock never beats you. And before you file, see how your judge rules on expert testimony.
© 2026 SwornIn LLC · swornin.io · This guide is informational only and is not legal advice; consult counsel and verify current statutes and rules in your jurisdiction before relying on any entry above.