Clark Tolson Nichols, MD
Anatomic Pathology & Clinical Pathology Physician · Springfield, OR
Clark Tolson Nichols, MD is an anatomic pathology & clinical pathology physician with a practice address in Springfield, Oregon, and NPI 1063903557, issued on May 21, 2018. Check the license (Oregon MD230871, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Clark Tolson Nichols
- Credential
- MD
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License numbers
- MD230871 OR
A175760 CA
7484 HI
Self-reported in NPPES; status is on the state search - Practice location
- 123 International Way, Springfield, OR 97477
- Phone
- (541) 222-6914
- Enumerated
- May 21, 2018
- Record last updated
- Jul 3, 2026
- Fax
- (541) 326-0924
- Medicare enrollment
- Enrolled (PECOS I20240812000753); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 195 in Oregon → Look up another NPI →
Also registered at 123 International Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Angela Christianson, PHARMDPharmacist1063390151
- John Ditomasso, M.D.Anatomic Pathology & Clinical Pathology Physician1750329462
- Debra Groom, M.D.Anatomic Pathology & Clinical Pathology Physician1699716746
- Lauren Hammock, MDAnatomic Pathology & Clinical Pathology Physician1518051937
- Michael Herz, M.D.Anatomic Pathology & Clinical Pathology Physician1114960549
- Jeffrey Houck, M.D.Anatomic Pathology & Clinical Pathology Physician1982645024
Verify Clark Tolson Nichols in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD230871Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- University OF Pittsburgh PhysiciansPittsburgh, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Clark Tolson Nichols among 195 anatomic pathology & clinical pathology physician records in Oregon
Clark Tolson Nichols, MD is one of 195 anatomic pathology & clinical pathology physician records with a practice address in Oregon. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 92% of them.
- NPI issued2018 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2018 · median 2006 among the 102 with a school on file
- Record last updated2026 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in Oregon
There are 195 anatomic pathology & clinical pathology physician records in Oregon.
All 195 in Oregon → Every provider in Springfield → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- John Ditomasso, M.D.Springfield, OR 974771750329462
- Debra Groom, M.D.Springfield, OR 974771699716746
- Lauren Hammock, MDSpringfield, OR 974771518051937
- Michael Herz, M.D.Springfield, OR 974771114960549
- Jeffrey Houck, M.D.Springfield, OR 974771982645024
- Daniel Kerrigan, M.D.Springfield, OR 974771336182922
- Jayanthi Kini, M.D.Springfield, OR 974771801975925
- Denis McCarthy, M.D.Springfield, OR 974771598706624
Common questions
What is Clark Tolson Nichols, MD's NPI number?
Clark Tolson Nichols, MD's National Provider Identifier (NPI) is 1063903557, issued on May 21, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Clark Tolson Nichols, MD located?
The NPPES record lists a practice address at 123 International Way, Springfield, OR, 97477. Phone: (541) 222-6914. Providers update this record themselves, so call before visiting.
How can I verify Clark Tolson Nichols, MD's license?
NPPES lists Oregon license number MD230871, 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.
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.