Timothy James Joos, MD
Internal Medicine Physician · Seattle, WA
Timothy James Joos, MD is an internal medicine physician with a practice address in Seattle, Washington, and NPI 1740265735, issued on Dec 13, 2005. Check the license (Washington MD00043045, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Timothy James Joos
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD00043045 WA
Self-reported in NPPES; status is on the state search - Practice location
- 4400 37TH Ave S, Seattle, WA 98118
- Phone
- (206) 461-6957
- Enumerated
- Dec 13, 2005
- Record last updated
- Nov 3, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (206) 461-7810
- Medicaid ID
- 8438483 WA
- Medicare enrollment
- Enrolled (PECOS I20051214000796); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1993
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,079 in Washington → Look up another NPI →
Also registered at 4400 37TH Ave S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rehema Abdi, MSWSocial Worker1679878573
- Faiza AbrahamRegistered Nurse1710703392
- Carolyn AkinbamiPediatrics Physician1902974975
- Kimberly Ander, RNRegistered Nurse1982899407
- Elisa Apostle, ARNPFamily Nurse Practitioner1639628878
- Mary Arnold, RD, LDN, CDERegistered Dietitian1407223266
Verify Timothy James Joos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00043045Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% more Medicare Part D claims than the average internal medicine physician in 2024
5,265 Medicare Part D claims for 316 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 113 claims were for opioids.
Most prescribed
- Atorvastatin Calcium398 claims
- Losartan Potassium261 claims
- Amlodipine Besylate238 claims
- Gabapentin224 claims
- Omeprazole216 claims
- Metformin Hcl Er200 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.
Bills Medicare through one group practice
- Neighborcare HealthSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy James Joos among 3,079 internal medicine physician records in Washington
Timothy James Joos, 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 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 fileYes · 60% of these records are
- Graduated1993 · median 2006 among the 1,852 with a school on file
- Record last updated2011 · 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
- Christopher Chen, MDSeattle, WA 981181376842146
- Dana Fong, M.D., PH.D.Seattle, WA 981181558511816
- Megan Gillum, M.D.Seattle, WA 981181710373824
- Sue Ikai, MDSeattle, WA 981181346395787
- Son Nguyen, M.D.Seattle, WA 981181508927716
- Edward Noonan, RPH,MDSeattle, WA 981181932274347
- Delaney Ruston, M.D.Seattle, WA 981181871770420
- Sharon TongSeattle, WA 981181578430591
Common questions
What is Timothy James Joos, MD's NPI number?
Timothy James Joos, MD's National Provider Identifier (NPI) is 1740265735, issued on Dec 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Timothy James Joos, MD located?
The NPPES record lists a practice address at 4400 37TH Ave S, Seattle, WA, 98118. Phone: (206) 461-6957. Providers update this record themselves, so call before visiting.
How can I verify Timothy James Joos, MD's license?
NPPES lists Washington license number MD00043045, 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 Timothy James Joos, MD prescribe under Medicare Part D?
In 2024, Timothy James Joos, MD had 5,265 Medicare Part D claims for 316 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.