WILLIAM PATRICK GERLACH O.D.
NPI 1285674291
Optometrist in Visalia, CA

Q: What is William Gerlach's NPI number?

The NPI number for William Gerlach is 1285674291. It was assigned to this individual provider in the NPPES registry on June 7, 2006.

Q: What is William Gerlach's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for William Gerlach was last updated on October 8, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.

Active since June 07, 2006PECOS Enrolled

2830 W MAIN ST, VISALIA, CA 93291(559) 636-1000(559) 733-7438 Get Directions Write a Review

NPPES record last updated: October 8, 2009. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About William Patrick Gerlach O.d. NPPES

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

WILLIAM PATRICK GERLACH O.D. (NPI 1285674291) is an individual optometrist in Visalia, California, licensed in California (OPT 6033 TPA) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1285674291

Entity TypeIndividualMale

Primary Taxonomy152W00000X

Provider Legal NameWILLIAM PATRICK GERLACHCredential: O.D.

Location Address2830 W MAIN STVisalia, CA 93291-4331

Mailing Address2830 W Main StVisalia, CA 93291-4331 · (559) 636-1000 · Fax (559) 733-7438

Phone(559) 636-1000

Fax(559) 733-7438

Sole ProprietorYes

Enumeration DateJune 7, 2006

Last NPPES UpdateOctober 8, 2009

✔ NPI 1285674291 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 · OPT 6033 TPA

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.

2830 W MAIN ST, Visalia, CA 93291

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Other Identifiers 5

OtherZZZ26499ZCA · Tied With Medicare Group Ptan

Medicare ID-Type UnspecifiedSD0060330CA

OtherOPT 6033 TPACA · Optometry License

Medicare UPINT10208CA

Medicare PINCC458ZCA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Patrick Gerlach 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 William Gerlach reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sierra Eye Medical Group Inc.

Same address

Ophthalmology

2830 W MAIN ST
Visalia, CA 93291

Reassigned Medicare billing, California enrollment
6 clinicians in this Medicare group

NPI 1649214388 (559) 636-1000

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 93291 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

$133.94 typical visit price

range $58.87 – $176.60

Typical copayment $33.48 (range $14.71 – $44.15)

Most-billed visit code 99204

Established Patient

$73.16 typical visit price

range $19.28 – $144.60

Typical copayment $18.29 (range $4.82 – $36.15)

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 10

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

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