Directory listing
Gregory Clark
M.D. · Portland, OR 97225
- Specialty
- Sleep Medicine (Psychiatry)
- Phone
- (503) 228-4414
- NPI
- 1225141823
- In the federal registry
- Since 2006
- Last checked
- NPPES · Nov 2026
Gregory Clark hasn’t joined MyDeprescriber yet, so the bio, tapering approach and availability aren’t verified. These details come from the federal NPPES provider registry. Are you Gregory? Claim this listing →
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