Liza Samson, MD
Family Medicine Physician · Portland, OR
Liza Samson, MD is a family medicine physician with a practice address in Portland, Oregon, and NPI 1447229109, issued on Mar 15, 2006. Check the license (Oregon MD22590, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Liza Samson
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD22590 OR
Self-reported in NPPES; status is on the state search - Practice location
- 2456 NW Northrup St, Portland, OR 97210
- Phone
- (503) 705-5753
- Enumerated
- Mar 15, 2006
- Record last updated
- Sep 12, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 287473 OR
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,847 in Oregon → Look up another NPI →
Also registered at 2456 NW Northrup St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Liza Samson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD22590Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average family medicine physician in 2024
81 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Liza Samson among 2,847 family medicine physician records in Oregon
Liza Samson, MD is one of 2,847 family medicine physician records with a practice address in Oregon. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 53% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2012 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
561 family medicine physician records list a practice address in Portland
They are 561 of the 42,088 NPPES records with a practice address in Portland, and 2,847 family medicine physician records in Oregon.
All 2,847 in Oregon → Every provider in Portland → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Christienne Alexander, MDPortland, OR 972101679775738
- Ann Anthony, MDPortland, OR 972101104001007
- Louise Clark, MDPortland, OR 972101396831178
- Ingeborg Hindel, MDPortland, OR 972101487600987
- Peter Hoffman, MDPortland, OR 972101952324139
- Rebecca Kennedy, MDPortland, OR 972101013956564
- Shaun Lan, MDPortland, OR 972101528224474
- Geoffrey McCarthy, MDPortland, OR 972101922195841
Common questions
What is Liza Samson, MD's NPI number?
Liza Samson, MD's National Provider Identifier (NPI) is 1447229109, issued on Mar 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Liza Samson, MD located?
The NPPES record lists a practice address at 2456 NW Northrup St, Portland, OR, 97210. Phone: (503) 705-5753. Providers update this record themselves, so call before visiting.
How can I verify Liza Samson, MD's license?
NPPES lists Oregon license number MD22590, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Liza Samson, MD prescribe under Medicare Part D?
In 2024, Liza Samson, MD had 81 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.