NPPES file of Aug 9, 2026

Derek William Clark, M.D.

Neurocritical Care Physician · Portland, OR

Derek William Clark, M.D. is a neurocritical care physician with a practice address in Portland, Oregon, and NPI 1518283589, issued on Apr 15, 2010. Check the license (Oregon MD158550, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1518283589
Name
Derek William Clark
Credential
M.D.
Primary taxonomy
Neurocritical Care Physician 2084A2900X
License numbers
MD158550 OR
MD60658145 WA
Self-reported in NPPES; status is on the state search
Practice location
9135 SW Barnes RD Ste 461, Portland, OR 97225
Phone
(503) 216-1150
Enumerated
Apr 15, 2010
Record last updated
Nov 25, 2022
Medicare enrollment
Enrolled (PECOS I20140519001422); accepts Medicare assignment
Medical or professional school
West Virginia University School Of Medicine, 2010
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest neurocritical care physician records → All 10 in Oregon → Look up another NPI →

Also registered at 9135 SW Barnes RD Ste 461

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

  1. Prakash Ambady, M.D.Neurology Physician1962784298
  2. Pradeep Chandan, DONeurology Physician1245735968
  3. Annie Chiu, M.D.Neurology Physician1376924670
  4. Melanie Clausen, AGACNPGerontology Nurse Practitioner1619791621
  5. Alexis Croucher, AGACNPGerontology Nurse Practitioner1134742539
  6. Felicia Ferguson, MDNeurology Physician1972511491

Verify Derek William Clark in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersOregon Medical Board
    Search for license MD158550    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Providence Health And Services OregonPortland, OR

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Derek William Clark among 10 neurocritical care physician records in Oregon

Derek William Clark, M.D. is one of 10 neurocritical care physician records with a practice address in Oregon. 100% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 60% of them.

  • NPI issued2010 · 60% of these records are older, 30% newer
  • In a Medicare fileYes · 100% of these records are
  • In the CMS Doctors and Clinicians fileYes · 100% of these records are
  • Graduated2010 · median 2008 among the 10 with a school on file
  • Record last updated2022 · 20% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084A2900X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Neurocritical Care Physician providers in Oregon

There are 10 neurocritical care physician records in Oregon.

All 10 in Oregon → Every provider in Portland → Neurocritical Care Physician nationwide →

The 8 neurocritical care physician records with the nearest ZIP codes

  1. Bruce Geryk, MDPortland, OR 972251275794802
  2. Lilith Judd, M.D.Portland, OR 972251508032327
  3. Bethany McClenathan, M.D.Portland, OR 972251073759841
  4. John Zurasky, MDPortland, OR 972131255337572
  5. Julia Durrant, M.D.Portland, OR 972391871665828
  6. Zhuyi Sun, M.D.Portland, OR 972391528449808
  7. Andrew Treister, MDPortland, OR 972391518385293
  8. Tarvez Tucker, MDPortland, OR 972391770537839

Common questions

What is Derek William Clark, M.D.'s NPI number?

Derek William Clark, M.D.'s National Provider Identifier (NPI) is 1518283589, issued on Apr 15, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Derek William Clark, M.D. located?

The NPPES record lists a practice address at 9135 SW Barnes RD Ste 461, Portland, OR, 97225. Phone: (503) 216-1150. Providers update this record themselves, so call before visiting.

How can I verify Derek William Clark, M.D.'s license?

NPPES lists Oregon license number MD158550, 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. Medicare files from data.cms.gov. 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.