Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Ryan I Grattan, MD

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1639669781

Dr. Ryan I Grattan, MD is a Critical Care Medicine (Internal Medicine) Physician in Portland, Oregon. Works from 2 locations. Licensed in Oregon.

Licensed in
OR
In the registry since
2018
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

3181 SW Sam Jackson Park Rd
Portland, OR 97239-3011
Phone: (503) 494-1620
Fax: (503) 494-6670
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3710 Sw Us Veterans Hospital Rd, Portland, OR 97239-2964 — (503) 220-8262

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence MD219533 (OR)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence MD219533 (OR)

Record details

NPI number1639669781
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 15, 2018
Last updated in NPPESOctober 7, 2026
Certification dateOctober 7, 2026

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