DR. SITHU LIN M.D.
NPI 1023417649
Internal Medicine - Nephrology in Fountain Valley, CA
About Dr. Sithu Lin M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SITHU LIN M.D. (NPI 1023417649) is an individual nephrology provider in Fountain Valley, California, licensed in California (A-143411) and active in the NPI registry since August 2014. He is enrolled in Medicare PECOS and is a graduate of Other (2006).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Sithu Lin M.d. 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
3Medicare enrollment records show Sithu Lin reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Dos Palos, CA 93620
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Golden Valley Health Centers
- 440 clinicians in this Medicare group
Modesto, CA 95350
- Reassigned Medicare billing, California enrollment
- 6 clinicians in this Medicare group
Stockton, CA 95219
- Reassigned Medicare billing, California enrollment
- 2 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.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92708 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
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 Sithu Lin's NPI number?
The NPI number for Sithu Lin is 1023417649. It was assigned to this individual provider in the NPPES registry on August 19, 2014.
Where is Sithu Lin located?
Sithu Lin practices at 11100 Warner Ave Ste 218, Fountain Valley, CA 92708. The listed phone number is (714) 641-9696.
What is Sithu Lin's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Sithu Lin enrolled in Medicare?
Yes. Sithu Lin 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 Sithu Lin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sithu Lin reassigns Medicare benefits to 3 organizations: Golden Valley Health Center (Dos Palos, CA), Modesto Kidney Medical Group (Modesto, CA) and Centurion Valley Healthcare Inc. (Stockton, CA). 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 Sithu Lin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Sithu Lin was last updated on July 11, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.
# Dr. Sithu Lin, M.D. · NPI 1023417649
Nephrology physician in Fountain Valley, California. Individual provider, active in the CMS NPPES registry since August 19, 2014.
## Identity
- **NPI:** 1023417649 (Entity type: Individual)
- **Enumerated:** August 19, 2014
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** A-143411 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 11100 WARNER AVE STE 218, Fountain Valley, CA 92708-7511
- **Phone:** (714) 641-9696
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Golden Valley Health Center (NPI 1770567778, Dos Palos, CA); Modesto Kidney Medical Group (NPI 1306848569, Modesto, CA); Centurion Valley Healthcare Inc. (NPI 1750773792, Stockton, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2006
## Record status
- **NPPES last updated:** July 11, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1023417649) · Data from the CMS NPPES public registry.