William Patrick Gerlach, OD
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 2830 W Main St, Visalia, CA 93291
- Practice phone
- Call (559) 636-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sierra Eye Medical Group
Eye care practice · Visalia, California
Find William Gerlach's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
William Patrick Gerlach is an optometrist in Visalia, California
William Gerlach practices at Sierra Eye Medical Group in Visalia, California.
William Gerlach's NPI, 1285674291, was assigned on June 7, 2006. William Gerlach holds California license OPT 6033 TPA.
- NPI
- 1285674291NPI Registry (opens in a new tab)
- NPI enumeration date
- June 7, 2006
- NPI status
- Active
- Practice phone
- (559) 636-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
William Patrick Gerlach practices at Sierra Eye Medical Group in Visalia, California
William Gerlach's primary practice is Sierra Eye Medical Group, at 2830 W Main St, Visalia, CA 93291. The practice phone is (559) 636-1000.
- Sierra Eye Medical Group2830 W Main St, Visalia, CA 93291Phone(559) 636-1000
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
William Patrick Gerlach is affiliated with 1 site of care and 1 medical group
William Gerlach's primary practice is Sierra Eye Medical Group in Visalia, California. Dmand AI also links William Gerlach to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at William Patrick Gerlach's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Gerlach practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sierra Eye Medical Group | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
William Patrick Gerlach is one of 7,206 optometrists in California
Optometrist is William Gerlach's primary specialty in the NPI Registry, under taxonomy code 152W00000X. William Gerlach is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near William Gerlach
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
William Patrick Gerlach's patients have a median age of 78
Across all payers, Dmand AI patient panel data puts William Gerlach's median patient age at 78, with 69% women.
William Gerlach's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women69%
- Men31%
Source: Dmand AI Patient Panel Data
Sources for William Patrick Gerlach's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about William Patrick Gerlach
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William Patrick Gerlach's NPI number?
William Patrick Gerlach's NPI number is 1285674291. It was assigned on June 7, 2006, and it is active in the NPI Registry.
What does William Patrick Gerlach specialize in?
William Patrick Gerlach is an optometrist in Visalia, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does William Patrick Gerlach practice?
William Gerlach practices at 2830 W Main St, Visalia, CA 93291. William Gerlach's primary practice is Sierra Eye Medical Group in Visalia, California. Dmand AI also links William Gerlach to 1 medical group.
What is William Patrick Gerlach's office phone number?
The practice phone on file for William Gerlach is (559) 636-1000.
What is William Patrick Gerlach's medical license number?
William Gerlach holds California license OPT 6033 TPA.
How long has William Patrick Gerlach been practicing?
William Gerlach's NPI was assigned in 2006.
Selling to optometrist practices?
See optometrists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card