KAREN C LIN O.D.
NPI 1831241801
Optometrist in Irvine, CA
About Karen C Lin O.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN C LIN O.D. (NPI 1831241801) is an individual optometrist in Irvine, California, licensed in California (OPT12328TPA) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS, maintains a secondary practice location in Fullerton, and is a graduate of Southern California College Of Optometry (2003).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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
Karen C Lin O.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
4Medicare enrollment records show Karen Lin reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 85 clinicians in this Medicare group
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 113 clinicians in this Medicare group
Anaheim, CA 92807
- Reassigned Medicare billing, California enrollment
- 131 clinicians in this Medicare group
Chino Hills, CA 91709
- Reassigned Medicare billing, California enrollment
- 5,228 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
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 92617 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.
IRVINE, CA 92617
IRVINE, CA 92617
IRVINE, CA 92617
IRVINE, CA 92617
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 Karen Lin's NPI number?
The NPI number for Karen Lin is 1831241801. It was assigned to this individual provider in the NPPES registry on January 18, 2007.
Where is Karen Lin located?
Karen Lin practices at 850 Health Sciences Rd, Irvine, CA 92617. The listed phone number is (949) 824-2020.
What is Karen Lin's specialty?
The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.
Is Karen Lin enrolled in Medicare?
Yes. Karen 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 Karen Lin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Lin reassigns Medicare benefits to 4 organizations: Regents Of The University Of California (Orange, CA), Regents Of The University Of California (Orange, CA), Marshall B. Ketchum University (Anaheim, CA) and Southern California Permanente Medical Group (Chino Hills, 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 Karen Lin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Lin accept?
Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and Providence Health Plan list Karen Lin 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.
When was this NPI record last updated?
The NPPES record for Karen Lin was last updated on December 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Karen C Lin, O.D. · NPI 1831241801
Optometrist provider in Irvine, California. Individual provider, active in the CMS NPPES registry since January 18, 2007.
## Identity
- **NPI:** 1831241801 (Entity type: Individual)
- **Enumerated:** January 18, 2007
- **Primary specialty:** Optometrist · taxonomy 152W00000X
- **State license:** OPT12328TPA (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 850 HEALTH SCIENCES RD, Irvine, CA 92617-3058
- **Phone:** (949) 824-2020
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1487602579, Orange, CA); Regents Of The University Of California (NPI 1871541953, Orange, CA); Marshall B. Ketchum University (NPI 1720101876, Anaheim, CA); Southern California Permanente Medical Group (NPI 1396287082, Chino Hills, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Southern California College Of Optometry, class of 2003
## Record status
- **NPPES last updated:** December 22, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1831241801) · Data from the CMS NPPES public registry.