CAL K. LIN MD
NPI 1710065305
Internal Medicine - Gastroenterology in South San Francisco, CA
About Cal K. Lin Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CAL K. LIN MD (NPI 1710065305) is an individual gastroenterology provider in South San Francisco, California, licensed in California (A60723) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (1995).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Cal K. Lin Md 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 Reassignment
Medicare enrollment records show Cal Lin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94116
- Reassigned Medicare billing, California enrollment
- 20,078 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94080 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
SOUTH SAN FRANCISCO, CA 94080
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 Cal Lin's NPI number?
The NPI number for Cal Lin is 1710065305. It was assigned to this individual provider in the NPPES registry on November 1, 2006.
Where is Cal Lin located?
Cal Lin practices at 1200 El Camino Real, South San Francisco, CA 94080. The listed phone number is (650) 742-2000.
What is Cal Lin's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Cal Lin enrolled in Medicare?
Yes. Cal 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 organization bills Medicare for Cal Lin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Cal Lin reassigns Medicare benefits to Permanente Medical Group Inc (San Francisco, CA). The 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 Cal 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 Cal Lin was last updated on December 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Cal K. Lin, MD · NPI 1710065305
Gastroenterology physician in South San Francisco, California. Individual provider, active in the CMS NPPES registry since November 1, 2006.
## Identity
- **NPI:** 1710065305 (Entity type: Individual)
- **Enumerated:** November 1, 2006
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** A60723 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1200 EL CAMINO REAL, South San Francisco, CA 94080-3208
- **Phone:** (650) 742-2000
## 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:** Permanente Medical Group Inc (NPI 1841373800, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Geffen School Of Medicine, class of 1995
## Record status
- **NPPES last updated:** December 22, 2021
- **Other identifiers:** Medicaid 00A607230 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1710065305) · Data from the CMS NPPES public registry.