Jeff Sienkiewicz, PA-C
Physician Assistant · Puyallup, WA
Jeff Sienkiewicz, PA-C is a physician assistant with a practice address in Puyallup, Washington, and NPI 1487326765, issued on Oct 4, 2021. Check the license (Washington PA61410321, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Jeff Sienkiewicz
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- PA61410321 WA
PA8994 MA
Self-reported in NPPES; status is on the state search - Practice location
- 4505 S Meridian # 101, Puyallup, WA 98373
- Phone
- (253) 697-5770
- Enumerated
- Oct 4, 2021
- Record last updated
- Aug 19, 2025
- Fax
- (253) 864-4014
- Medicare enrollment
- Enrolled (PECOS I20240828004398); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,718 in Washington → Look up another NPI →
Verify Jeff Sienkiewicz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license PA61410321Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average physician assistant in 2024
59 Medicare Part D claims for 45 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin14 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
- Multicare Health SystemTacoma, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jeff Sienkiewicz among 3,718 physician assistant records in Washington
Jeff Sienkiewicz, PA-C is one of 3,718 physician assistant records with a practice address in Washington. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 77% of them.
- NPI issued2021 · 77% of these records are older, 17% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2022 · median 2017 among the 2,460 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
88 physician assistant records list a practice address in Puyallup
They are 88 of the 3,461 NPPES records with a practice address in Puyallup, and 3,718 physician assistant records in Washington.
All 3,718 in Washington → Every provider in Puyallup → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Bose AmosunPuyallup, WA 983731962283622
- Ednorah Arvelo, PA-CPuyallup, WA 983731558365296
- Lex Barker, PA-CPuyallup, WA 983731447762000
- Benjamin Cichon, PA-CPuyallup, WA 983731346642196
- Erin DurchPuyallup, WA 983731639627847
- Tiana FullerPuyallup, WA 983731164387056
- Christopher Hughes, PA-CPuyallup, WA 983731306044391
- Susan Jouflas, PHYSICIAN ASSISTANTPuyallup, WA 983731730268392
Common questions
What is Jeff Sienkiewicz, PA-C's NPI number?
Jeff Sienkiewicz, PA-C's National Provider Identifier (NPI) is 1487326765, issued on Oct 4, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Jeff Sienkiewicz, PA-C located?
The NPPES record lists a practice address at 4505 S Meridian # 101, Puyallup, WA, 98373. Phone: (253) 697-5770. Providers update this record themselves, so call before visiting.
How can I verify Jeff Sienkiewicz, PA-C's license?
NPPES lists Washington license number PA61410321, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Jeff Sienkiewicz, PA-C prescribe under Medicare Part D?
In 2024, Jeff Sienkiewicz, PA-C had 59 Medicare Part D claims for 45 beneficiaries; the average among physician assistant prescribers was 830. 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.