NPPES file of Aug 9, 2026

Mark Seligman, M.D.

Hematology & Oncology Physician · Portland, OR

Mark Seligman, M.D. is a hematology & oncology physician with a practice address in Portland, Oregon, and NPI 1528061173, issued on May 27, 2005. Check the license (Oregon MD11837, as entered in NPPES) on the Oregon Medical Board; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1528061173
Name
Mark Seligman
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
License number
MD11837 OR
Self-reported in NPPES; status is on the state search
Practice location
5050 NE Hoyt St, Portland, OR 97213
Phone
(503) 232-7000
Enumerated
May 27, 2005
Record last updated
Oct 17, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(503) 232-8266
Medicaid ID
232744 OR
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest hematology & oncology physician records → All 138 in Oregon → Look up another NPI →

Also registered at 5050 NE Hoyt St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Daniel AmatoInternal Medicine Physician1740217280
  2. Steven Andersen, MDPhysical Medicine & Rehabilitation Physician1184606295
  3. Elise Anderson, MDNeurology Physician1972764777
  4. Ross Anderson, MDObstetrics & Gynecology Physician1447209549
  5. Michael Balkovich, MDPlastic and Reconstructive Surgery Physician1134296791
  6. Nancybeth BanaskyPhysical Therapist1922206655

Verify Mark Seligman in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersOregon Medical Board
    Search for license MD11837    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Oregon license search

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Mark Seligman among 138 hematology & oncology physician records in Oregon

Mark Seligman, M.D. is one of 138 hematology & oncology physician records with a practice address in Oregon. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 82% newer
  • In a Medicare fileNo · 78% of these records are
  • In the CMS Doctors and Clinicians fileNo · 70% of these records are
  • Record last updated2007 · 56% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in Oregon

There are 138 hematology & oncology physician records in Oregon. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 138 in Oregon → Every provider in Portland → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. Sharif Ahmed, M.D.Portland, OR 972131629465554
  2. Evelyn Brosnan, M.D.Portland, OR 972131497098941
  3. Myung Sun KimPortland, OR 972131639457583
  4. Jeffrey Menashe, M.D.Portland, OR 972131871596551
  5. William Mooney, M.D.Portland, OR 972131467455014
  6. William Pearse, MDPortland, OR 972131225423148
  7. David Regan, M.D.Portland, OR 972131255334926
  8. Miklos Simon, MDPortland, OR 972131710919972

Common questions

What is Mark Seligman, M.D.'s NPI number?

Mark Seligman, M.D.'s National Provider Identifier (NPI) is 1528061173, issued on May 27, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Mark Seligman, M.D. located?

The NPPES record lists a practice address at 5050 NE Hoyt St, Portland, OR, 97213. Phone: (503) 232-7000. Providers update this record themselves, so call before visiting.

How can I verify Mark Seligman, M.D.'s license?

NPPES lists Oregon license number MD11837, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.