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Edit this profileAt a glance
- 1959 Ne Pacific St, Box 356424, Seattle, WA 98195
About Dr. Derleth
Mark D. Derleth, M.D. practices gastroenterology in Seattle, WA. Mark is a 2006 graduate of Boston University School of Medicine. Medicare claims data shows Mark provided 162 services to 152 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, biopsy of large bowel using a flexible endoscope, and removal of polyps or growths of large bowel using an endoscope with mechanical snare. The provider's National Provider Identifier (NPI) is 1356457063.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (206) 598-4377
- Email not available
Practice Locations
1959 NE PACIFIC ST BOX 356424
Seattle, WA 98195
Conditions Commonly Evaluated or Treated
Within Gastroenterology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
Procedures & services
Most searched procedures
Lower endoscopy
Upper endoscopy
Capsule and physiology testing
Diagnostic Testing
Liver procedures
Treatments
Procedures Most Often Billed to Medicare
162 services · 152 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
36 | As often as other peers in Gastroenterology |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
34 | Less often than most peers in Gastroenterology |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
26 | Less often than most peers in Gastroenterology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
40 | Less often than most peers in Gastroenterology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
15 | Less often than most peers in Gastroenterology |
| Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monit | Billing code | G0500 |
11 | Less often than most peers in Gastroenterology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterologists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 5
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other gastroenterologists in Seattle 7
Same specialty, same city.
Trained at Boston University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2006 at Boston University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of large bowel using a flexible endoscope 8
Providers in WA who bill this service to Medicare most often.
Common questions
What does Mark D. Derleth specialize in?
Mark D. Derleth is a gastroenterologist in Seattle, WA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where is Mark D. Derleth located?
Mark D. Derleth is listed at 1959 Ne Pacific St Box 356424, Seattle, WA 98195. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Mark D. Derleth's phone number?
The number on file is (206) 598-4377. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Mark D. Derleth?
Mark D. Derleth's National Provider Identifier is 1356457063. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Mark D. Derleth train?
Mark D. Derleth attended Boston University School of Medicine, graduating in 2006. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Mark D. Derleth have?
Mark D. Derleth has 20 years experience. Calculated from a graduation year of 2006, reported in the CMS National Downloadable File.
CMS public data
What does Mark D. Derleth do most often?
According to Medicare billing data, Mark D. Derleth performs procedures including biopsy of large bowel using a flexible endoscope, removal of polyps or growths of large bowel using an endoscope with mechanical snare and biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Mark D. Derleth's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Mark D. Derleth. If this is you, claiming it is free.
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