NPPES file of Aug 9, 2026

Clark Morris Hatheway

Internal Medicine Physician · Kirkland, WA

Clark Morris Hatheway is an internal medicine physician with a practice address in Kirkland, Washington, and NPI 1861955783, issued on Apr 8, 2019. Check the license (Washington MD61263733, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1861955783
Name
Clark Morris Hatheway
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
MD61263733 WA
Self-reported in NPPES; status is on the state search
Practice location
12910 Totem Lake Blvd NE Ste 101, Kirkland, WA 98034
Phone
(425) 814-5000
Enumerated
Apr 8, 2019
Record last updated
Aug 5, 2022
Medicare enrollment
Enrolled (PECOS I20220914003397); accepts Medicare assignment
Medical or professional school
University Of Pittsburgh School Of Medicine, 2019
Telehealth
Offers telehealth (CMS)
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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Also registered at 12910 Totem Lake Blvd NE Ste 101

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

  1. Kimberley Johnson, RPHPharmacist1316486707
  2. Michael Su, MDInternal Medicine Physician1144806803
  3. Jonah Imee Talavera-Paragas, MDInternal Medicine Physician1790426773

Verify Clark Morris Hatheway in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWashington Medical Commission
    Search for license MD61263733
    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 Washington 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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16% fewer Medicare Part D claims than the average internal medicine physician in 2024

2,652 Medicare Part D claims for 366 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 52 claims were for opioids.

  1. Clark Hatheway2,652
  2. Specialty average3,176

Most prescribed

  1. Atorvastatin Calcium340 claims
  2. Amlodipine Besylate148 claims
  3. Lisinopril134 claims
  4. Levothyroxine Sodium125 claims
  5. Losartan Potassium94 claims
  6. Metformin Hcl Er65 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.

Industry payments in 2024: $17.98

1 payment: food and beverage; the largest payer was Hologic Sales and Service, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Clark Hatheway$17.98
  2. Specialty average$1,303.06

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Pacmed ClinicsKirkland, WA

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

70 internal medicine physician records list a practice address in Kirkland

They are 70 of the 3,404 NPPES records with a practice address in Kirkland, and 3,079 internal medicine physician records in Washington.

Other internal medicine physician records in Washington

  1. Sheida Aalami, M.D.Seattle, WA1730573296
  2. Gloria AbacanProsser, WA1316040298
  3. Ahmad Abadullah, MDUniversity Place, WA1225005721
  4. Rebecca AbaySeattle, WA1528565520
  5. Naseer Abbas, MDTacoma, WA1962769380
  6. James Abbey, M.D.Anacortes, WA1447646039
  7. Joel Abbott, D.O.Tacoma, WA1477752723
  8. Paul Abdallah, MDSeattle, WA1639166119
  9. Abir Abdel-Kader, MDRichland, WA1649407081
  10. Hussein Abdille, MDSeattle, WA1588368831

Common questions

What is Clark Morris Hatheway's NPI number?

Clark Morris Hatheway's National Provider Identifier (NPI) is 1861955783, issued on Apr 8, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Clark Morris Hatheway located?

The NPPES record lists a practice address at 12910 Totem Lake Blvd NE Ste 101, Kirkland, WA, 98034. Phone: (425) 814-5000. Providers update this record themselves, so call before visiting.

How can I verify Clark Morris Hatheway's license?

NPPES lists Washington license number MD61263733, 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 Morris Hatheway prescribe under Medicare Part D?

In 2024, Clark Morris Hatheway had 2,652 Medicare Part D claims for 366 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.