1. Home
  2. Directory
  3. California
  4. Livermore
  5. Optometrist
  6. NPI Profile

MELANIE LOUISE MASON O.D.
NPI 1891082913
Optometrist in Livermore, CA

Active since July 10, 2011PECOS Enrolled
1800 4TH ST, LIVERMORE, CA 94550(925) 447-3883 Get Directions Write a Review

NPPES record last updated: November 17, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 17, 2021, Jun 19, 2018 (2 updates tracked since 2018).

About Melanie Louise Mason O.d. NPPES

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

MELANIE LOUISE MASON O.D. (NPI 1891082913) is an individual optometrist in Livermore, California, licensed in California (14231) and active in the NPI registry since July 2011. She is enrolled in Medicare PECOS, maintains a secondary practice location in Berkeley, and is a graduate of University Of California - School Of Optometry (2011).

NPPES Registry Identity

NPI1891082913
Entity TypeIndividualFemale
Primary Taxonomy152W00000X
Provider Legal NameMELANIE LOUISE MASONCredential: O.D.
Location Address1800 4TH STLivermore, CA 94550
Mailing Address1800 4th StLivermore, CA 94550-4454 · (925) 447-3883
Phone(925) 447-3883
Sole ProprietorYes
Medical School CMSUniversity Of California - School Of OptometryGraduated 2011
Enumeration DateJuly 10, 2011
Last NPPES UpdateNovember 17, 20212 updates tracked since enumeration
NPPES CertifiedNovember 17, 2021
✔ NPI 1891082913 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 · 14231
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.
1800 4TH ST, Livermore, CA 94550
Open in Google Maps ↗

Secondary Practice Location 1

Location 12222 Bancroft Way, 3rd FloorBerkeley, CA 94720-4301 · Phone (510) 643-2020

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Melanie Louise Mason O.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID840452264
PECOS Enrollment IDI20120501000743
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

3

Medicare enrollment records show Melanie Mason reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Livermore Optometry Group
Same address
Optometrist
1800 4TH ST
Livermore, CA 94550
  • Reassigned Medicare billing, California enrollment
  • 11 clinicians in this Medicare group
NPI 1114062635 (925) 447-3883
Regents Of The University Of California At Berkeley
30 mi
Optometrist
230 MINOR HALL
Berkeley, CA 94720
  • Reassigned Medicare billing, California enrollment
  • 96 clinicians in this Medicare group
NPI 1306908058 (510) 642-0945
Ecs Of Bay Area Optometry Corporation
50 mi
Optometrist
440 IGNACIO BLVD
Novato, CA 94949
  • Reassigned Medicare billing, California enrollment
  • 28 clinicians in this Medicare group
NPI 1154207868 (618) 462-9818

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 4

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.

Photography of the retina 92250
Photography of the retina, also known as retinal imaging, is a non-invasive procedure that captures images of the back of your eye. This helps doctors identify and monitor conditions like glaucoma, macular degeneration, or diabetic retinopathy. It's painless and quick, often part of a routine eye exam.
25 services25 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
25 services20 patients
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.
24 services24 patients
Imaging of optic nerve 92133
Imaging of the optic nerve is a non-invasive procedure that captures detailed pictures of your optic nerve. It helps doctors assess eye health, particularly for conditions like glaucoma. It's painless, quick, and uses safe technology like MRI or OCT (Optical Coherence Tomography).
13 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94550 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.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. TERESA ANN YIM O.D.
Optometrist (Corneal and Contact Management)
1800 4TH ST
LIVERMORE, CA 94550
Alameda County (925) 447-3883
LIVERMORE OPTOMETRY GROUP
Optometrist
1800 4TH ST
LIVERMORE, CA 94550
Alameda County (925) 447-3883
DR. PAMELA ROSEMARY JETTER OD
Optometrist
1800 4TH ST
LIVERMORE, CA 94550
Alameda County (925) 447-3883
DR. STEVEN E FAITH O.D.
Optometrist
1800 4TH ST
LIVERMORE, CA 94550
Alameda County (925) 447-3883
DR. SHAWNA ELIZABETH KUNTZ O.D.
Optometrist
1800 4TH ST
LIVERMORE, CA 94550
Alameda County (925) 447-3883
DR. CLARK M. ABRAMSON O.D.
Optometrist
1800 4TH ST
LIVERMORE, CA 94550
Alameda County (925) 447-3883

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 Melanie Mason's NPI number?

The NPI number for Melanie Mason is 1891082913. It was assigned to this individual provider in the NPPES registry on July 10, 2011.

Where is Melanie Mason located?

Melanie Mason practices at 1800 4th St, Livermore, CA 94550. The listed phone number is (925) 447-3883.

What is Melanie Mason's specialty?

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

Is Melanie Mason enrolled in Medicare?

Yes. Melanie Mason is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Melanie Mason's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Melanie Mason reassigns Medicare benefits to 3 organizations: Livermore Optometry Group (Livermore, CA), Regents Of The University Of California At Berkeley (Berkeley, CA) and Ecs Of Bay Area Optometry Corporation (Novato, 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 Melanie Mason's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Melanie Mason 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 Melanie Mason 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 Melanie Mason was last updated on November 17, 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.