William Robb Maclellan, MD
Cardiovascular Disease Physician · Seattle, WA
William Robb Maclellan, MD is a cardiovascular disease physician with a practice address in Seattle, Washington, and NPI 1427077320, issued on Jul 19, 2006. Check the license on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- William Robb Maclellan
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- G84856 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1959 NE Pacific St, Seattle, WA 98195
- Phone
- (206) 616-1040
- Enumerated
- Jul 19, 2006
- Record last updated
- Apr 22, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (206) 616-4847
- Medicaid ID
- 00G848560 CA
- Medicare enrollment
- Enrolled (PECOS I20111122000692); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 512 in Washington → Look up another NPI →
Also registered at 1959 NE Pacific St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Robb Maclellan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical CommissionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
402 Medicare Part D claims for 56 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Atorvastatin Calcium47 claims
- Metoprolol Succinate41 claims
- Jardiance36 claims
- Entresto33 claims
- Rosuvastatin Calcium30 claims
- Carvedilol26 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.
The MIPS final score for 2023 (Medicare payment program): 93.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- The Association OF University PhysiciansSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Robb Maclellan among 512 cardiovascular disease physician records in Washington
William Robb Maclellan, MD is one of 512 cardiovascular disease 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 46% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1988 · median 2002 among the 351 with a school on file
- Record last updated2013 · 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 207RC0000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Washington
There are 512 cardiovascular disease physician records in Washington.
All 512 in Washington → Every provider in Seattle → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Kelley BranchSeattle, WA 981951760572622
- Carol BuchterSeattle, WA 981951013007962
- James Caldwell, MDSeattle, WA 981951326158338
- Andrew Cheng, MDSeattle, WA 981951710092416
- Hui-San Chung, MDSeattle, WA 981951659485308
- Rosario Freeman, MDSeattle, WA 981951245370436
- George Gey, MDSeattle, WA 981951902981731
- Eric Krieger, MDSeattle, WA 981951134231194
Common questions
What is William Robb Maclellan, MD's NPI number?
William Robb Maclellan, MD's National Provider Identifier (NPI) is 1427077320, issued on Jul 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Robb Maclellan, MD located?
The NPPES record lists a practice address at 1959 NE Pacific St, Seattle, WA, 98195. Phone: (206) 616-1040. Providers update this record themselves, so call before visiting.
How can I verify William Robb Maclellan, MD's license?
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 William Robb Maclellan, MD prescribe under Medicare Part D?
In 2024, William Robb Maclellan, MD had 402 Medicare Part D claims for 56 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is William Robb Maclellan, MD's MIPS final score?
The 2023 MIPS final score is 93.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.