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DR. CALVIN TAN O.D.
NPI 1043507643
Optometrist in Pasadena, CA

Active since July 03, 2011PECOS EnrolledAccepts Medicare Assignment
477 E COLORADO BLVD, PASADENA, CA 91101(626) 796-1191(626) 796-0189 Get Directions Write a Review

NPPES record last updated: October 24, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Calvin Tan O.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. CALVIN TAN O.D. (NPI 1043507643) is an individual optometrist in Pasadena, California, licensed in California (14313TLG) and active in the NPI registry since July 2011. He is enrolled in Medicare PECOS and is a graduate of State University Of New York - State College Optometry (2011).

NPPES Registry Identity

NPI1043507643
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameDR. CALVIN TANCredential: O.D.
Location Address477 E COLORADO BLVDPasadena, CA 91101-2024
Mailing Address477 E Colorado BlvdPasadena, CA 91101-2024 · (626) 796-1191 · Fax (626) 796-0189
Phone(626) 796-1191
Fax(626) 796-0189
Sole ProprietorYes
Medical School CMSState University Of New York - State College OptometryGraduated 2011
Enumeration DateJuly 3, 2011
Last NPPES UpdateOctober 24, 2021
NPPES CertifiedOctober 24, 2021
✔ NPI 1043507643 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
License✔ Licensed in CA · 14313TLG
Definition
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
477 E COLORADO BLVD, Pasadena, CA 91101
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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. Calvin Tan 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.

PECOS PAC ID749444289
PECOS Enrollment IDI20120612000616
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Calvin Tan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Linden Optometry A Professional Corporation
Same address
Optometrist
477 E COLORADO BLVD
Pasadena, CA 91101
  • Reassigned Medicare billing, California enrollment
  • 36 clinicians in this Medicare group
NPI 1831201078 (626) 796-1191
Southern California Permanente Medical Group
4.8 mi
Health Maintenance Organization
2626 COLORADO BLVD
Los Angeles, CA 90041
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1013409044 (877) 608-0044

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 91101 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DR. BARBARA JILL ARMSTRONG OD
Optometrist
477 E COLORADO BLVD
PASADENA, CA 91101
Los Angeles County (626) 796-1191
TZE YU TUNG
Optometrist
477 E COLORADO BLVD
PASADENA, CA 91101
Los Angeles County (626) 796-1191
THERESA TRAN OD
Optometrist
477 E COLORADO BLVD
PASADENA, CA 91101
Los Angeles County (626) 796-1191
JESSICA CHANG OD
Optometrist
477 E COLORADO BLVD
PASADENA, CA 91101
Los Angeles County (626) 796-1191
PAUL SEIDEL OD
Optometrist
477 E COLORADO BLVD
PASADENA, CA 91101
Los Angeles County (626) 796-1191
DR. MINGLIH EMILY LINDEN OD
Optometrist
477 E COLORADO BLVD
PASADENA, CA 91101
Los Angeles County (626) 796-1191
TOM KIEN WONG OD
Optometrist
477 E COLORADO BLVD
PASADENA, CA 91101
Los Angeles County (626) 796-1191
MEN CHEH LIN
Optometrist (Low Vision Rehabilitation)
477 E COLORADO BLVD
PASADENA, CA 91101
Los Angeles County (626) 796-1191

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 Calvin Tan's NPI number?

The NPI number for Calvin Tan is 1043507643. It was assigned to this individual provider in the NPPES registry on July 3, 2011.

Where is Calvin Tan located?

Calvin Tan practices at 477 E Colorado Blvd, Pasadena, CA 91101. The listed phone number is (626) 796-1191.

What is Calvin Tan's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is Calvin Tan enrolled in Medicare?

Yes. Calvin Tan 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 Calvin Tan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Calvin Tan reassigns Medicare benefits to 2 organizations: Linden Optometry A Professional Corporation (Pasadena, CA) and Southern California Permanente Medical Group (Los Angeles, 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 Calvin Tan'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 Calvin Tan was last updated on October 24, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.