Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark La Shell, M.D.
Allergy Physician in Bellevue, WA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1205825288
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark La Shell
Credential M.D.
Sex Male
Practice address 11511 Ne 10th St, Bellevue, WA, 98004
Phone (425) 502-3000
Enumeration date Oct 21, 2005
Last updated in NPPES Apr 26, 2021
Taxonomy & licenses
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD070164L (PA) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What is the NPI number for Mark La Shell?
The National Provider Identifier (NPI) for Mark La Shell is 1205825288, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark La Shell practice?
The practice location on file with NPPES is in Bellevue, WA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Linda Blakely Ophthalmology Physician · Bellevue, WA NPI 1932102365 Tara Hook Physician Assistant · Bellevue, WA NPI 1245211150 Chiaki Gauntt Ophthalmology Physician · Bellevue, WA NPI 1295717510 Patti Purpura Emergency Medicine Physician · Bellevue, WA NPI 1619950805 Nicola Ullery Advanced Practice Midwife · Bellevue, WA NPI 1205811353 Carolyn Hanson Registered Nurse · Bellevue, WA NPI 1447224902 Lynda Crescenzi Medical Physician Assistant · Bellevue, WA NPI 1841266137 Diane Kastens Certified Registered Nurse Anesthetist · Bellevue, WA NPI 1366418337
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-26.