Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Alex Kosloff, MD

Individual provider Internal Medicine Physician · NPI 1598722597

Alex Kosloff, MD practises Internal Medicine in Seattle, Washington. Graduated from Saint Louis University School of Medicine in 1980, 46 years ago. Practices with Grays Harbor Community Hospital, a 92-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Arkansas and Washington.

Years since qualifying
46
Trained at
Saint Louis University School of Medicine
Licensed in
AR, WA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1930 Post Aly
Seattle, WA 98101-1074
Phone: (206) 728-4143
Fax: (206) 956-1018
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 6500 Hospital Dr, Hannibal, MO 63401-6890 — (573) 629-3419
  • 1006 N H St, Aberdeen, WA 98520-2521 — (360) 537-6496

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD60331130 (WA)
Internal Medicine Physician Taxonomy 207R00000X · Licence E-4604 (AR)

Record details

NPI number1598722597
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 26, 2006
Last updated in NPPESSeptember 2, 2026
Certification dateSeptember 2, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolSAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1980 (46 years in practice)
Group practice Grays Harbor Community Hospital — 92 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Grays Harbor Community Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 92 clinicians in the practice; 12 are shown here.

Other providers in Seattle