A specific frustration shows up again and again in administrator communities: candidates who passed the Core, sometimes comfortably, and then stalled on the NHA Line of Service exam. If that is you, nothing is wrong with your ability. The LOS is a different exam with a different center of gravity, and preparing for it specifically works better than studying "everything" a second time.
NAB splits licensure into the Core of Knowledge exam, shared by all long-term care administrator candidates, and a Line of Service exam for your setting; for nursing home administrators that is the NHA LOS. Both draw on the same 4 domains, but they are not the same test:
| Core | NHA Line of Service | |
|---|---|---|
| Questions | 125 (100 scored + 25 pretest) | 75 (60 scored + 15 pretest) |
| Time | 150 minutes | 90 minutes |
| Content center | Foundational knowledge across all lines of long-term care | The same domains applied specifically to skilled nursing: clinical care standards, resident rights in practice, the survey and compliance machinery |
| Passing score | 113 scaled | 113 scaled, scored independently |
The Core rewards breadth. A candidate with strong general management knowledge, decent regulatory awareness, and solid math can clear it even with soft spots in nursing-home specifics. The LOS removes that cushion. Its scenarios live inside the building: care planning and clinical standards, resident rights applied to daily situations rather than recited as principles, infection control, survey conduct, and the federal regulatory framework as it operates in a skilled nursing facility. Shorter also means less room to absorb a weak area; with 60 scored questions, a domain gap that cost you a handful of points on the Core costs proportionally more here.
The practical diagnosis, if you have a failed LOS score report in hand: look at which domains sagged. For business-background candidates it is usually Care, Services & Supports; for clinical-background candidates, the regulatory and operations scenarios. The domain-by-domain map of what lives where is in The Core Domains Explained, including how the NHA weights the domains differently from the Core.
The daily study path here treats the NHA Line of Service as its own rotation, not an afterthought: LOS-weighted drills alternate with the Core domains on a rotating cycle, weak-spot training aims at whichever domain your results flag, and the weekly Checkpoint mixes both exams' styles under time. Candidates preparing for an LOS-only retake can lean on the domain-focused Bonus Practice to stay inside skilled-nursing material.
Question counts, timing, the passing score, and retake mechanics reflect NAB's published materials as of July 2026 and change between handbook editions. Some states also add a state exam on top of the two NAB exams; check which states require one and confirm with your board.
It is a recognized pattern, especially for candidates from non-clinical backgrounds, because the LOS strips the breadth cushion the Core allows. You retake only the LOS; the Core pass stands unless your state says otherwise.
Shorter (75 questions, 90 minutes) and narrower but deeper: the same 4 domains applied specifically to skilled nursing care, rights, and regulation.
A scaled 113 on the 50-to-150 scale, scored independently of the Core. No penalty for guessing, so answer everything.
Yes, if your Core is passed: reapply through NAB for the LOS only, get a new ATT and a 90-day scheduling window. Four attempts per exam per cycle effective January 1, 2026; your state may allow fewer.
NHA Line of Service rotations in the daily path, weak-spot training aimed at your lowest domain, and timed Checkpoints that rehearse the shorter clock. Try 5 free questions first.
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