Active NPI
Jeff Sienkiewicz, PA-C
- Physician Assistant
- Puyallup, WA
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Physician Assistant
- License
- PA61410321
- Practice address
- 4505 S Meridian # 101
Puyallup, WA 98373-5002 - Phone
- (253) 697-5770
- Fax
- (253) 864-4014
- NPI assigned
- Oct 4, 2021
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Physician Assistant | 363A00000X | PA61410321 | WA | Primary |
| Physician Assistant | 363A00000X | PA8994 | MA |
Addresses
Primary practice location
4505 S Meridian # 101
Puyallup, WA 98373-5002
Mailing address
PO Box 5299
Ms: 820-5-Pco
Tacoma, WA 98415-0299
Other practice location 1
65 Clarendon St Apt 6
Boston, MA 02116-6040
Phone (203) 727-7638
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in WA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: No
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Physician Assistant
- Education
- Other, 2022
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
311 S L St
Tacoma, WA 98405-3720
4700 Point Fosdick Dr
Gig Harbor, WA 98335-1706
9420 N Newport Hwy
Suite 103
Spokane, WA 99218-1391
Phone (253) 403-1000
Hospital & facility affiliations
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| PA61410321 | WA | MD | Physician Assistant |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Multicare Health System | Current | Accepting new patients | |
| Multicare Health System | Current | Accepting new patients |
Locations
4700 Point Fosdick Dr
Ste 104
Gig Harbor, WA 98335
Phone (253) 459-7590
222 State Ave N
Kent, WA 98030
Phone (253) 372-7680
311 S L St
Tacoma, WA 98405
Phone (253) 403-1444
Interoperability endpoints
- jsienkiewicz790858@direct.multicare.org
Organizations & group practices 3
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- Neurological Surgery Physician
- Tacoma, WA
- NPI 1497766638
-
- Community/Retail Pharmacy
- Spokane, WA
- NPI 1396594875
-
- Physical Therapist
- Lakewood, WA
- NPI 1790298081
Hospital & facility affiliations 1
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Spokane, WA
- NPI 1356528269
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1633305600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1755561600000",
"number": "1487326765",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 5299",
"address_2": "MS: 820-5-PCO",
"city": "TACOMA",
"state": "WA",
"postal_code": "984150299"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "4505 S MERIDIAN # 101",
"city": "PUYALLUP",
"state": "WA",
"postal_code": "983735002",
"telephone_number": "253-697-5770",
"fax_number": "253-864-4014"
}
],
"practiceLocations": [
{
"address_1": "65 Clarendon St Apt 6",
"address_purpose": "LOCATION",
"city": "Boston",
"state": "MA",
"postal_code": "021166040",
"country_code": "US",
"telephone_number": "203-727-7638",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "SIENKIEWICZ",
"first_name": "JEFF",
"credential": "PA-C",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2021-10-04",
"last_updated": "2025-08-19",
"certification_date": "2025-08-19",
"status": "A"
},
"taxonomies": [
{
"code": "363A00000X",
"taxonomy_group": "",
"desc": "Physician Assistant",
"state": "WA",
"license": "PA61410321",
"primary": true
},
{
"code": "363A00000X",
"taxonomy_group": "",
"desc": "Physician Assistant",
"state": "MA",
"license": "PA8994",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Puyallup, WA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 19, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.