Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Alexander Castiello, MD

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1780628313

Alexander Castiello, MD is a Pathology in Mount Vernon, Washington. Graduated from University of South Florida College of Medicine in 1994, 32 years ago. Practices with Murray-Calloway County Public Hospital Corporation, a 89-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Alaska, Kentucky, Tennessee and Washington.

Years since qualifying
32
Trained at
University of South Florida College of Medicine
Licensed in
AK, KY, TN, WA
In the registry since
2006
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

111 S 12th St Ste D
Mount Vernon, WA 98274-4000
Phone: (360) 734-2800
Fax: (360) 734-3818
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 3614 Meridian St Ste 100, Bellingham, WA 98225-1748 — (360) 734-2800
  • 3548 Meridian St Ste 101, Bellingham, WA 98225-1710 — (360) 734-2800

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence IMLC.MD.61277913 (WA)
Anatomic Pathology & Clinical Pathology Physician Taxonomy 207ZP0102X · Licence 192330 (AK)
Anatomic Pathology & Clinical Pathology Physician Taxonomy 207ZP0102X · Licence 46633 (KY)
Anatomic Pathology & Clinical Pathology Physician Taxonomy 207ZP0102X · Licence MD40440 (TN)

Record details

NPI number1780628313
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 15, 2006
Last updated in NPPESJune 14, 2022
Certification dateJune 14, 2022
Mailing address3560 Meridian St Ste 101, Bellingham, WA 98225-1731

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPATHOLOGY
Medical schoolUNIVERSITY OF SOUTH FLORIDA COLLEGE OF MEDICINE
Graduated 1994 (32 years in practice)
Group practice Murray-Calloway County Public Hospital Corporation — 89 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Mount Vernon