Sidney H. Allison, MD
Internal Medicine Physician · Seattle, WA
Sidney H. Allison, MD is an internal medicine physician with a practice address in Seattle, Washington, and NPI 1275893752, issued on May 18, 2012. Check the license (Washington MD60476243, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Sidney H. Allison
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD60476243 WA
Self-reported in NPPES; status is on the state search - Practice location
- 747 Broadway, Seattle, WA 98122
- Phone
- (206) 215-2520
- Enumerated
- May 18, 2012
- Record last updated
- Feb 10, 2026
- Fax
- (206) 386-3180
- Medicaid ID
- 2029080 WA
- Medicare enrollment
- Enrolled (PECOS I20170525002692); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,079 in Washington → Look up another NPI →
Also registered at 747 Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Justin Abadejos, DOStudent in an Organized Health Care Education/Training Program1629771670
- Alexa AbdullahDoula1346710001
- Manal Abdur Rahman, MDInternal Medicine Physician1073049805
- Jennifer Achilles, MDPediatrics Physician1891965133
- Michele AdamsSpecialist1619131448
- Jinny Kaye AgpaoaFamily Nurse Practitioner1609686724
Verify Sidney H. Allison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60476243Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
34 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through 5 group practices
- American Specialty Physicians Group IncColusa, CA
- San Francisco Unified Physicians Group, IncSan Francisco, CA
- Swedish Health ServicesSeattle, WA
- University OF California Sfgh Medical GroupSan Francisco, CA
- Valley Medical Group-RentonRenton, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sidney H. Allison among 3,079 internal medicine physician records in Washington
Sidney H. Allison, MD 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 2012, is newer than 68% of them.
- NPI issued2012 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2012 · median 2006 among the 1,852 with a school on file
- Record last updated2026 · 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).
821 internal medicine physician records list a practice address in Seattle
They are 821 of the 41,956 NPPES records with a practice address in Seattle, and 3,079 internal medicine physician records in Washington.
All 3,079 in Washington → Every provider in Seattle → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kenji Asakura, MDSeattle, WA 981221538179965
- Nassim Assefi, MDSeattle, WA 981221558441055
- Kimberly Bell, MDSeattle, WA 981221730262767
- J Brodsky, MDSeattle, WA 981221073532859
- Bennett Burke, MDSeattle, WA 981221821171851
- Edward Chun, M.D.Seattle, WA 981221639150436
- Joseph Denor, MDSeattle, WA 981221679548531
- Peggy Eaton, M.D.Seattle, WA 981221326001918
Common questions
What is Sidney H. Allison, MD's NPI number?
Sidney H. Allison, MD's National Provider Identifier (NPI) is 1275893752, issued on May 18, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Sidney H. Allison, MD located?
The NPPES record lists a practice address at 747 Broadway, Seattle, WA, 98122. Phone: (206) 215-2520. Providers update this record themselves, so call before visiting.
How can I verify Sidney H. Allison, MD's license?
NPPES lists Washington license number MD60476243, 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 Sidney H. Allison, MD prescribe under Medicare Part D?
In 2024, Sidney H. Allison, MD had 34 Medicare Part D claims; 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.