100+ Free OMS Practice Questions

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Question 1

Score: 0/0

Extended-wear skin barriers are most appropriate for patients who:

Have sensitive skin or peristomal skin complications and need fewer changes

Are immediately post-operative with new stomas

Have formed colostomy output requiring daily change

Prefer closed-end pouches

to track

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2026 Statistics

Key Facts: OMS Exam

110

Max Exam Questions

2 hours

80%

Passing Score

NAWCO requirement

$380

Exam Fee

$350 + $30 processing

5 years

Credential Validity

Recertification cycle

Max Attempts

NAWCO policy

1 year

Experience Required

Within past 5 years

The OMS exam contains up to 110 questions over 2 hours requiring an 80% passing score. Open to all licensed health care providers with 1 year of ostomy care experience. Content covers ostomy anatomy, pouching systems, peristomal skin complications, output management, and urostomy-specific care. NAWCO credentials are valid for 5 years with renewal through CE or retesting.

Sample OMS Practice Questions

Try these sample questions to test your OMS exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which ostomy type diverts urine rather than stool?

A.Colostomy

B.Ileostomy

C.Urostomy

D.Jejunostomy

Explanation: A urostomy (urinary diversion) routes urine through an abdominal stoma. Colostomy and ileostomy divert stool; jejunostomy diverts intestinal contents.

2A healthy, mature stoma should appear which color?

A.Pale pink

B.Beef red to deep pink

C.Dusky purple

D.Dark brown

Explanation: A well-vascularized mature stoma is beefy red to deep pink, moist, and shiny — indicating adequate perfusion and mucosal health.

3An ascending colostomy produces output that is primarily:

A.Formed solid stool

B.Liquid to semi-liquid stool

C.Concentrated urine

D.Thick paste-like stool

Explanation: The ascending colon absorbs little water; output is liquid to semi-liquid, similar to ileostomy output, requiring a drainable pouch.

4A sigmoid colostomy typically produces:

A.Liquid output

B.Semi-formed output

C.Formed or near-formed stool

D.Mucus only

Explanation: The sigmoid colon is the last absorptive segment; most water has been reabsorbed, so output is typically formed or near-formed, sometimes allowing irrigation management.

5A Brooke ileostomy differs from a Kock continent ileostomy in that the Brooke:

A.Has an internal reservoir requiring intubation

B.Requires no external pouch

C.Opens flush to skin with continuous external pouching

D.Is used exclusively for urinary diversion

Explanation: A Brooke ileostomy is a traditional end ileostomy protruding 2–3 cm from the abdomen, draining continuously into an external pouch. The Kock has an internal reservoir.

6The most common form of urinary diversion is the:

A.Indiana pouch

B.Orthotopic neobladder

C.Ileal conduit

D.Cutaneous ureterostomy

Explanation: The ileal conduit (Bricker procedure) is the most common urinary diversion; a segment of ileum connects ureters to a cutaneous stoma with continuous urine drainage into an external pouch.

7The Indiana pouch is best described as:

A.A non-continent ileal conduit

B.A continent cutaneous urinary reservoir

C.An orthotopic bladder substitute

D.A colonic urinary diversion with external pouching

Explanation: The Indiana pouch is a continent cutaneous diversion using the right colon and ileum; patients self-catheterize through the stoma to drain urine — no external pouch needed.

8According to WOCN guidelines, the primary goal of pre-operative stoma siting is to:

A.Minimize surgical incision length

B.Identify a location for secure pouching and patient self-care

C.Select the stoma closest to the midline

D.Place the stoma in the upper abdomen for gravity drainage

Explanation: WOCN stoma siting aims to place the stoma within the rectus muscle, away from scars/bony prominences/skin folds, visible to the patient, and suitable for a secure pouch seal.

9When siting a stoma pre-operatively, the nurse has the patient assume which positions to assess skin folds?

A.Supine only

B.Supine, sitting, and standing

C.Standing only

D.Prone and lateral

Explanation: WOCN recommends evaluating the abdomen in supine, sitting, and standing positions to identify dynamic skin folds, creases, and bony prominences that could compromise pouching.

10A one-piece pouching system differs from a two-piece system in that:

A.The barrier and pouch are integrated into a single unit

B.The barrier is changed more frequently than the pouch

C.It requires a flange for attachment

D.It is exclusively used for ileostomies

Explanation: In a one-piece system, the skin barrier and pouch are permanently attached; the entire unit is removed at each change. A two-piece system has a separate barrier (wafer) and detachable pouch.

About the OMS Exam

The OMS (Ostomy Management Specialist) certification validates clinical expertise in ostomy care across all health care disciplines. The exam covers ostomy types (colostomy, ileostomy, urostomy), stoma anatomy, pouching systems and accessories, peristomal skin complication management, output management, dietary education, pre-operative stoma siting, and psychosocial support. Up to 110 multiple-choice questions must be answered in 2 hours with an 80% passing score required.

Questions

110 scored questions

Time Limit

2 hours

Passing Score

80% (88/110 questions correct)

Exam Fee

$380 (National Alliance of Wound Care and Ostomy (NAWCO / NAWCCB))

OMS Exam Content Outline

~25%

Ostomy Types & Anatomy

Colostomy subtypes (ascending, transverse, descending, sigmoid), ileostomy types (Brooke, Kock continent), urinary diversions (ileal conduit, cutaneous ureterostomy, orthotopic neobladder, Indiana pouch), stoma characteristics, post-op assessment, necrosis recognition

~25%

Pouching Systems & Accessories

One-piece vs. two-piece, drainable vs. closed-end, convex vs. flat, extended wear barriers, skin barrier rings/paste/powder, sealant wipes, deodorizers, belts, aperture sizing, barrier removal technique, pouch change procedure

~20%

Peristomal Skin Complications

Irritant contact dermatitis, MASD, allergic contact dermatitis, candidiasis (KOH), folliculitis, pyoderma gangrenosum, hypergranulation, parastomal hernia, mucocutaneous separation, crusting technique

~20%

Output Management & Nutrition

Normal ileostomy output 800-1,200 mL/day, high-output definition >2,000 mL/day, loperamide and adjunct agents, electrolyte imbalance (hyponatremia, hypokalemia, hypomagnesemia), food bolus obstruction management, dietary modifications by ostomy type, dehydration recognition, urostomy acidification

~10%

Pre-op Siting, Psychosocial & Credentialing

WOCN siting guidelines, rectus abdominis placement rationale, three-position assessment, body image, sexual concerns, UOAA peer support, pediatric considerations, DME billing, OMS eligibility and recertification

How to Pass the OMS Exam

What You Need to Know

Passing score: 80% (88/110 questions correct)
Exam length: 110 questions
Time limit: 2 hours
Exam fee: $380

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

OMS Study Tips from Top Performers

1Know the output consistency by ostomy level: ileostomy = liquid (800-1,200 mL/day), ascending colostomy = liquid, transverse = semi-formed, sigmoid = formed

2Memorize high-output ileostomy threshold (>2,000 mL/day) and first-line treatment (loperamide, electrolyte replacement)

3Distinguish irritant contact dermatitis (mirror-image of barrier) from allergic (extends beyond barrier) from candidiasis (satellite lesions, positive KOH)

4Know convex barrier indications: retracted, flush, or skin crease stomas — contraindicated for prolapse

5Understand urostomy-specific issues: acidic urine goal, encrustation treatment (dilute white vinegar), mucus is normal in ileal conduit

6Master the crusting technique: powder → sealant wipe × 2-3 layers for denuded skin

7Know WOCN stoma siting requirements: within rectus muscle, visible to patient, supine/sitting/standing assessment

8Learn the OMS exam specifics: up to 110 questions, 2 hours, 80% passing score, 5-year validity, 4 total attempts

9Recognize stoma necrosis (black non-blanching = urgent surgical notification) vs. normal post-op edema (pink/red)

10Understand electrolyte losses in ileostomy: hyponatremia, hypokalemia, hypomagnesemia are the key triad

Frequently Asked Questions

What is the OMS certification?

The OMS (Ostomy Management Specialist) certification is awarded by NAWCO (National Alliance of Wound Care and Ostomy) to health care providers who demonstrate clinical competency in ostomy care. It covers stoma types, pouching systems, peristomal skin management, and patient education.

Who is eligible to take the OMS exam?

Any active-licensed health care provider — including LPN/LVN, RN, NP, PA, PT, OT, MD, DO, or DPM — who has 1 year of full-time ostomy care experience within the past 5 years and meets one of three pathway requirements (experiential, CE, or formal training).

How many questions are on the OMS exam?

The OMS exam contains up to 110 multiple-choice questions completed in 2 hours. A passing score of 80% is required. NAWCO allows up to 4 total exam attempts.

What is the OMS exam fee?

The OMS exam fee is $380 ($350 exam fee + $30 nonrefundable processing fee). The same fee applies to each retake attempt. Up to 4 total attempts are allowed.

How long is OMS certification valid?

OMS credentials are valid for 5 years. Recertification options include retaking the exam, completing an approved ostomy management training course, or documenting 60 hours of approved continuing education in skin/wound/ostomy care.

What topics are on the OMS exam?

The OMS exam covers ostomy types (colostomy, ileostomy, urostomy), stoma anatomy and assessment, pre-operative stoma siting, pouching systems, peristomal skin complications, output management (including high-output ileostomy), dietary education, urostomy care, psychosocial concerns, and basic credentialing knowledge.

How should I prepare for the OMS exam?

Study the OMS Candidate Exam Handbook, WOCN clinical guidelines, and ostomy care references. Focus on stoma complication recognition, pouching system selection, electrolyte management in high-output ileostomy, and urostomy-specific care. Plan 6–12 weeks of dedicated study with practice questions across all content areas.