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ANDREW MAH O.D.
NPI 1497286496
Optometrist in San Ramon, CA

Active since March 22, 2017PECOS Enrolled
2837 YOSEMITE AVE, SAN RAMON, CA 94583(925) 818-5704 Get Directions Write a Review

NPPES record last updated: March 22, 2017. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Andrew Mah O.d. NPPES

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

ANDREW MAH O.D. (NPI 1497286496) is an individual optometrist in San Ramon, California, licensed in California (33628) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1497286496
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameANDREW MAHCredential: O.D.
Location Address2837 YOSEMITE AVESan Ramon, CA 94583-3438
Mailing Address2837 Yosemite AveSan Ramon, CA 94583-3438
Phone(925) 818-5704
Sole ProprietorNo
Enumeration DateMarch 22, 2017
✔ NPI 1497286496 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
Licenses✔ Licensed in CA · 33628✔ Licensed in WA · 60707338
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.
2837 YOSEMITE AVE, San Ramon, CA 94583
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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 (PECOS)

Andrew Mah O.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show Andrew Mah reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Doris H Wong Optometric Corporation
3.4 mi
Optometrist
5580 SPRINGDALE AVE STE E
Pleasanton, CA 94588
  • Reassigned Medicare billing, California enrollment
  • 10 clinicians in this Medicare group
NPI 1457773822 (925) 463-3100

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.

Established patient complete exam of visual system 92014
An established patient complete exam of the visual system involves a thorough check of your eyes and vision. It assesses eye health, checks for diseases, and measures your ability to see clearly at different distances. It's a routine, non-invasive procedure.
13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94583 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
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.

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 Andrew Mah's NPI number?

The NPI number for Andrew Mah is 1497286496. It was assigned to this individual provider in the NPPES registry on March 22, 2017.

Where is Andrew Mah located?

Andrew Mah practices at 2837 Yosemite Ave, San Ramon, CA 94583. The listed phone number is (925) 818-5704.

What is Andrew Mah's specialty?

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

Is Andrew Mah enrolled in Medicare?

Yes. Andrew Mah is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Andrew Mah's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Mah reassigns Medicare benefits to Doris H Wong Optometric Corporation (Pleasanton, 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 Andrew Mah'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 Andrew Mah was last updated on March 22, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.