Build negative keywords from evidence of mismatch, not from assumptions about who will never become a patient. Start with clearly irrelevant business categories and wrong destinations, then review live search terms, choose the narrowest effective negative match, and record why the exclusion belongs at that level.
This protects both budget and learning in healthcare advertising. A universal list can remove obvious noise, but it can also block service, location, insurance, provider, or educational language that matters in a specific practice. The safest starting method is restrained, documented, and reversible.
Negative keywords route intent away from the wrong offer
A negative keyword is a routing control. It tells the platform not to show an ad when a search matches the exclusion rule. The business purpose is to prevent a query from reaching an offer or campaign that cannot answer it.
That is different from judging the value of the person searching. A term may be wrong for one campaign and useful for another. Job language does not belong in a patient-acquisition service campaign, but it may belong in a recruitment campaign. A city name may be outside one location's service area and inside another's.
Write the mismatch in operational language. "The campaign does not offer employment" is defensible. "Job searchers never become patients" is an unsupported assumption. The first statement supports a routing rule without pretending to know the person's future behavior.
Seed only exclusions the practice can defend
The starting list should cover terms whose mismatch is stable across the chosen scope. Examples may include services the practice does not provide, employment or training intent in a service campaign, unrelated product categories, and locations the practice cannot serve.
Confirm each term against the landing page and operating scope. Do not exclude a broad word because it appeared in one poor query. A single token can occur inside useful searches. Review phrase context, variants, misspellings, and the way negative match types behave.
Assign a reason and owner before launch. Record the source of the exclusion, affected campaigns, negative match, expected routing result, review date, and rollback condition. This turns the seed list into a governed decision rather than inherited account folklore.
Review live search terms before expanding
Search terms show how matching behaved in the active account. They reveal language that keyword planning did not predict, including mixed intent and new variants. Review meaning, destination fit, and downstream evidence before deciding whether to add, exclude, reroute, or observe.
Read the full query available in the report. Compare it with the matched keyword, ad group, ad promise, landing page, location, and conversion action. A term that looks informational may still be appropriate when the page genuinely answers the question and offers a proportional next step. A commercial-looking term may still be wrong for the practice's scope.
Do not use one conversion as proof that a broad query family is valuable. Check the event definition and operational disposition. Likewise, do not exclude a term solely because it has not converted in a short or low-volume sample. Use mismatch evidence first, then performance evidence in context.
Use the Negative Keyword Evidence Ladder
The Negative Keyword Evidence Ladder assigns the narrowest exclusion level supported by the facts. It prevents an ad-group problem from becoming an account-wide ban.
Move through four evidence levels in order:
- account-wide mismatch for a term that is irrelevant to every eligible advertising use
- shared campaign mismatch for a term that several campaigns should consistently avoid
- campaign routing conflict where the query belongs in another controlled branch
- ad-group mismatch where the search needs a different promise or landing-page answer
Keep uncertain terms below the ladder in an observation queue. Define what evidence will resolve them: more search-term context, a service-owner decision, location confirmation, landing-page changes, or staff disposition quality. An unknown should not become a broad exclusion simply to make the report cleaner.
For high-impact terms, test the proposed negative against known useful queries. If a negative phrase would block an eligible service variation, narrow it. Record the test so another manager can understand why the match type was chosen.
Which level should own the exclusion?
The level should match the scope of the mismatch. Use account-wide control only when every relevant campaign shares the exclusion. Use a shared list for stable groups of campaigns. Use campaign or ad-group negatives when the term belongs elsewhere or conflicts with a narrower message.
Google's negative-keyword documentation confirms two important mechanics. Negative keywords can prevent ads from showing on searches containing excluded terms, and negative matching behaves differently from positive keyword matching. The source does not identify which healthcare searches a practice should exclude.
Google also supports shared lists and broad account-level exclusions. Those tools reduce administration, but a shared list does not make each term appropriate for every campaign. Review where the list is applied and test changes against the intended routing map.
Use naming that describes the reason, not the person. "Outside service area" and "recruitment intent" are clearer than "bad traffic." Reason-based names also make conflicts easier to spot when a new campaign has a legitimate use for a previously excluded family.
Protect useful research and access intent
Healthcare searches often include questions, provider names, insurance language, symptoms, service comparisons, and location details. Some are not appropriate advertising targets or claims, but broad exclusion by question word can remove a legitimate path to useful practice information.
Judge the query against the page's role. If the landing page only asks for contact and does not answer the research task, the problem may be destination fit rather than the existence of informational intent. The right response could be a content page, a different campaign, an exclusion, or no paid coverage. Make that decision explicitly.
Keep clinical and advertising review separate from negative-keyword management. A term being eligible to match does not approve the associated ad claim or landing-page content. Current platform policy and the practice's qualified reviewers still control those boundaries.
Every high-impact exclusion needs a record
Negative keyword maintenance should produce an audit trail of additions, removals, conflicts, and observed effects. Review exclusions when services, locations, landing pages, campaigns, or practice capacity change.
Start with the Negative Keyword Evidence Ladder, seed only stable mismatch, and add live evidence cautiously. For help implementing that routing system, paid media and growth can align exclusions with campaign ownership, landing pages, and operational feedback without treating the largest list as the most disciplined one.