MS. LOK YUN LOUISE SIN ARNP
NPI 1083209514
Nurse Practitioner in Renton, WA
About Ms. Lok Yun Louise Sin Arnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. LOK YUN LOUISE SIN ARNP (NPI 1083209514) is an individual nurse practitioner in Renton, Washington, licensed in Washington (AP61164250) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS, is affiliated with Valley Medical Center, and maintains a secondary practice location in San Gabriel.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Ms. Lok Yun Louise Sin Arnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Lok Yun Louise Sin reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Renton, WA 98055
- Reassigned Medicare billing, Washington enrollment
- 689 clinicians in this Medicare group
Sacramento, CA 95817
- Reassigned Medicare billing, California enrollment
- 2,570 clinicians in this Medicare group
Downey, CA 90241
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: The Oncology Institute Ca, A Professional Corporation
- 110 clinicians in this Medicare group
Bethesda, MD 20814
- Reassigned Medicare billing, Maryland enrollment
- 4,483 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Valley Medical Center
Acute Care Hospitals · Renton, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98055 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
RENTON, WA 98055
RENTON, WA 98055
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Lok Yun Louise Sin's NPI number?
The NPI number for Lok Yun Louise Sin is 1083209514. It was assigned to this individual provider in the NPPES registry on March 5, 2021.
Where is Lok Yun Louise Sin located?
Lok Yun Louise Sin practices at 3915 Talbot Rd S Ste 300, Renton, WA 98055. The listed phone number is (425) 690-3409.
What is Lok Yun Louise Sin's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Lok Yun Louise Sin enrolled in Medicare?
Yes. Lok Yun Louise Sin is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Lok Yun Louise Sin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lok Yun Louise Sin reassigns Medicare benefits to 4 organizations: Valley Medical Group-Renton (Renton, WA), Regents Of The Univ Of Ca (Sacramento, CA), Starling Oncology Ca, A Professional Corporation (Downey, CA) and Johns Hopkins University (Bethesda, MD). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Lok Yun Louise Sin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lok Yun Louise Sin accept?
Health plans from UnitedHealthcare list Lok Yun Louise Sin as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Lok Yun Louise Sin affiliated with any hospitals?
According to CMS data, Lok Yun Louise Sin is affiliated with Valley Medical Center.
When was this NPI record last updated?
The NPPES record for Lok Yun Louise Sin was last updated on October 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Ms. Lok Yun Louise Sin, ARNP · NPI 1083209514
Nurse Practitioner physician in Renton, Washington. Individual provider, active in the CMS NPPES registry since March 5, 2021.
## Identity
- **NPI:** 1083209514 (Entity type: Individual)
- **Enumerated:** March 5, 2021
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** AP61164250 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 3915 TALBOT RD S STE 300, Renton, WA 98055-5738
- **Phone:** (425) 690-3409 · **Fax:** (425) 690-9004
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Valley Medical Group-Renton (NPI 1619209574, Renton, WA); Regents Of The Univ Of Ca (NPI 1285068783, Sacramento, CA); Starling Oncology Ca, A Professional Corporation (NPI 1275651515, Downey, CA); Johns Hopkins University (NPI 1578569240, Bethesda, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** October 31, 2025
- **Other identifiers:** Medicaid 2249439 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1083209514) · Data from the CMS NPPES public registry.