Clark O. Parrish, M.D.
Internal Medicine Physician · Bellingham, WA
Clark O. Parrish, M.D. is an internal medicine physician with a practice address in Bellingham, Washington, and NPI 1891791232, issued on Jun 21, 2005. Check the license (Washington MD00024849, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Clark O. Parrish
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MD00024849 WA
MD188136 OR
Self-reported in NPPES; status is on the state search - Practice location
- 4545 Cordata Pkwy, Bellingham, WA 98226
- Phone
- (360) 738-2200
- Enumerated
- Jun 21, 2005
- Record last updated
- Mar 29, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (360) 715-2486
- Medicaid IDs
- 1032549 WA
1891791232 WA - Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,079 in Washington → Look up another NPI →
Also registered at 4545 Cordata Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Clark O. Parrish in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00024849Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
280 Medicare Part D claims for 137 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Albuterol Sulfate Hfa13 claims
- Losartan Potassium13 claims
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.
Clark O. Parrish among 3,079 internal medicine physician records in Washington
Clark O. Parrish, M.D. is one of 3,079 internal medicine physician records with a practice address in Washington. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2019 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
84 internal medicine physician records list a practice address in Bellingham
They are 84 of the 5,172 NPPES records with a practice address in Bellingham, and 3,079 internal medicine physician records in Washington.
All 3,079 in Washington → Every provider in Bellingham → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shari Cummins, M.D.Bellingham, WA 982261942290820
- Charles Gargano, M.D.Bellingham, WA 982261689663288
- Michael Geist, M.D.Bellingham, WA 982261306845722
- Martha Gillham, M.D.Bellingham, WA 982261275532699
- Robert Hoffmeister, M.D.Bellingham, WA 982261336145754
- John Holroyd, M.D.Bellingham, WA 982261811996234
- Dawn Hutchison, D.O.Bellingham, WA 982261285623249
- Pamela Laughlin, M.D.Bellingham, WA 982261790781151
Common questions
What is Clark O. Parrish, M.D.'s NPI number?
Clark O. Parrish, M.D.'s National Provider Identifier (NPI) is 1891791232, issued on Jun 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Clark O. Parrish, M.D. located?
The NPPES record lists a practice address at 4545 Cordata Pkwy, Bellingham, WA, 98226. Phone: (360) 738-2200. Providers update this record themselves, so call before visiting.
How can I verify Clark O. Parrish, M.D.'s license?
NPPES lists Washington license number MD00024849, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Clark O. Parrish, M.D. prescribe under Medicare Part D?
In 2024, Clark O. Parrish, M.D. had 280 Medicare Part D claims for 137 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.