John Gregor Holzheimer, LISW
- Affiliated sites
- 2
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2016
- Practice address
- 38882 Mentor Avenue, Willoughby, OH 44094
- Practice phone
- Call (440) 953-9999
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Willoughby Health Center
FQHC - Main Site · Willoughby, Ohio
Find John Holzheimer'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.
John Gregor Holzheimer is a counselor in Willoughby, Ohio
John Holzheimer practices at Willoughby Health Center in Willoughby, Ohio.
John Holzheimer's NPI, 1124572987, was assigned on August 10, 2016. John Holzheimer holds Ohio license I.2506361.
- NPI
- 1124572987NPI Registry (opens in a new tab)
- NPI enumeration date
- August 10, 2016
- NPI status
- Active
- Practice phone
- (440) 953-9999
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
John Gregor Holzheimer practices at Willoughby Health Center in Willoughby, Ohio
John Holzheimer's primary practice is Willoughby Health Center, at 38882 Mentor Avenue, Willoughby, OH 44094. The practice phone is (440) 953-9999.
- Willoughby Health Center38882 Mentor Avenue, Willoughby, OH 44094Phone(440) 953-9999
Source: Dmand AI Affiliation Data
John Gregor Holzheimer is affiliated with 2 sites of care and 1 medical group
John Holzheimer's primary practice is Willoughby Health Center in Willoughby, Ohio. The medical group on file is Signature Health. Dmand AI also links John Holzheimer to 1 more community health center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John Gregor Holzheimer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Holzheimer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Willoughby Health Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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John Gregor Holzheimer is one of 1,121 counselors in Ohio
Counselor is John Holzheimer's primary specialty in the NPI Registry, under taxonomy code 101Y00000X. John Holzheimer is licensed in Ohio.
Specialties and state licenses
- Counselor, OhioPrimary
Counselors near John Holzheimer
Counts of counselors 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
John Gregor Holzheimer's patients have a median age of 39
Across all payers, Dmand AI patient panel data puts John Holzheimer's median patient age at 39, with 50% women.
John Holzheimer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 39
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Sources for John Gregor Holzheimer'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 Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| 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 John Gregor Holzheimer
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What is John Gregor Holzheimer's NPI number?
John Gregor Holzheimer's NPI number is 1124572987. It was assigned on August 10, 2016, and it is active in the NPI Registry.
What does John Gregor Holzheimer specialize in?
John Gregor Holzheimer is a counselor in Willoughby, Ohio. The primary specialty in the NPI Registry is Counselor (taxonomy code 101Y00000X).
Where does John Gregor Holzheimer practice?
John Holzheimer practices at 38882 Mentor Avenue, Willoughby, OH 44094. John Holzheimer's primary practice is Willoughby Health Center in Willoughby, Ohio. Dmand AI also links John Holzheimer to 1 community health center.
What is John Gregor Holzheimer's office phone number?
The practice phone on file for John Holzheimer is (440) 953-9999.
What is John Gregor Holzheimer's medical license number?
John Holzheimer holds Ohio license I.2506361.
What medical group is John Gregor Holzheimer part of?
John Holzheimer is linked to Signature Health.
How long has John Gregor Holzheimer been practicing?
John Holzheimer graduated from medical school in 2013, 13 years ago.
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