Doctor profile · Federal record

Dr. Kaiyun Mai, O.D.

Optometrist (CMS: Optometry) · Castro Valley, CA

  • NPI 1730436643
  • Accepts Medicare
  • 14 yrs in practice
  • Female
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
3550 Castro Valley Blvd
Castro Valley, CA 945464402
(510) 581-1680
Mailing address
14603 Merced St
San Leandro, CA 945791058

Credentials & registration

NPPES · NUCC
NPI registered
August 2012 — 14 yrs on file
Profile last updated
June 11, 2023
Year of graduation
2012 — 14 yrs since
Specialty taxonomy
152W00000X — NUCC code
State license (1)
California #14443

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1730436643. Last verified May 11, 2026.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$15
Transactions
1
Manufacturers
1
Payer (manufacturer) Industry Txns Amount
Johnson & Johnson Vision Care, INC. 1 $15.03

By nature of payment

Food and Beverage
$15

Frequently asked questions

Auto-generated from federal data
What is Dr. Kaiyun Mai's medical specialty?
Dr. Kaiyun Mai practices Optometrist in Castro Valley, CA.
Where does Dr. Kaiyun Mai practice?
Dr. Kaiyun Mai practices at 3550 Castro Valley Blvd, Castro Valley, CA 945464402. Office phone: 5105811680.
What is Dr. Kaiyun Mai's NPI?
Dr. Kaiyun Mai's National Provider Identifier (NPI) is 1730436643, issued by NPPES.
Does Dr. Kaiyun Mai accept Medicare assignment?
Yes. Dr. Kaiyun Mai accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.