Mark J. Vonderharr, PA-C
- Part D claims, 2024
- 220
- Hospital affiliations
- 2
- Medical groups
- 6
- State license
- 1
- Year NPI issued
- 2010
- Practice address
- 909 W Santa Anita Ave, San Gabriel, CA 91776
- Practice phone
- Call (330) 493-4443
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Vep Hutchinson Emergency Medical Group
San Gabriel, California
Find Mark Vonderharr'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.
Mark J. Vonderharr is a physician assistant in San Gabriel, California
Mark Vonderharr practices at Vep Hutchinson Emergency Medical Group in San Gabriel, California.
Mark Vonderharr's NPI, 1518279637, was assigned on July 6, 2010.
- NPI
- 1518279637NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436522356
- NPI enumeration date
- July 6, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (330) 493-4443
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark J. Vonderharr practices at Vep Hutchinson Emergency Medical Group in San Gabriel, California
Mark Vonderharr's primary practice is Vep Hutchinson Emergency Medical Group, at 909 W Santa Anita Ave, San Gabriel, CA 91776 in Los Angeles County. The practice phone is (330) 493-4443.
- Vep Hutchinson Emergency Medical Group909 W Santa Anita Ave, San Gabriel, CA 91776 · Los Angeles CountyPhone(330) 493-4443
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Mark J. Vonderharr is affiliated with 7 sites of care and 6 medical groups
Mark Vonderharr's primary practice is Vep Hutchinson Emergency Medical Group in San Gabriel, California. Mark Vonderharr is also affiliated with St. Catherine Hospital - Garden City. The medical group on file is VEP Hutchinson Emergency Medical Group. Dmand AI also links Mark Vonderharr to 1 more hospital, 5 medical groups, 3 group practices and clinics and 1 community health center, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Mark J. Vonderharr's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Vonderharr practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vep Hutchinson Emergency Medical Group | Available with a free account |
| +6 more sites and 5 medical groups | 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.
Mark J. Vonderharr is one of 11,482 physician assistants in California
Physician assistant is Mark Vonderharr's primary specialty in the NPI Registry, under taxonomy code 363A00000X.
Specialties and state licenses
- Physician assistantPrimary
Physician assistants near Mark Vonderharr
Counts of physician assistants 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
Mark J. Vonderharr's patients have a median age of 40
Across all payers, Dmand AI patient panel data puts Mark Vonderharr's median patient age at 40, with 53% women.
Mark Vonderharr's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 40
Patient panel by sex, all payers
- Women53%
- Men47%
Source: Dmand AI Patient Panel Data
Mark J. Vonderharr wrote 220 Medicare Part D claims in 2024
In 2024, Mark Vonderharr wrote 220 Medicare Part D claims for 82 patients. 91% of them were for generic drugs.
Mark Vonderharr's Part D claims by kind of drug, 2024
- Generic200 claims91%
- Brand-name20 claims9%
Drug classes CMS tracks in Mark Vonderharr's Part D claims, 2024
- Opioids12%27 of 220 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Mark J. Vonderharr takes part in Medicare
Mark Vonderharr accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Sources for Mark J. Vonderharr'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Mark J. Vonderharr
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mark J. Vonderharr's NPI number?
Mark J. Vonderharr's NPI number is 1518279637. It was assigned on July 6, 2010, and it is active in the NPI Registry.
What does Mark J. Vonderharr specialize in?
Mark J. Vonderharr is a physician assistant in San Gabriel, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Mark J. Vonderharr practice?
Mark Vonderharr practices at 909 W Santa Anita Ave, San Gabriel, CA 91776. Mark Vonderharr's primary practice is Vep Hutchinson Emergency Medical Group in San Gabriel, California. Dmand AI also links Mark Vonderharr to 1 hospital, 5 medical groups, 3 group practices and clinics and 1 community health center.
What is Mark J. Vonderharr's office phone number?
The practice phone on file for Mark Vonderharr is (330) 493-4443.
Which hospitals is Mark J. Vonderharr affiliated with?
Mark Vonderharr is affiliated with St. Catherine Hospital - Garden City. Dmand AI links Mark Vonderharr to 1 more hospital.
What medical group is Mark J. Vonderharr part of?
Mark Vonderharr is linked to VEP Hutchinson Emergency Medical Group. Dmand AI links Mark Vonderharr to 5 more medical groups.
Does Mark J. Vonderharr accept Medicare?
Yes. CMS lists Mark Vonderharr as accepting Medicare assignment.
How long has Mark J. Vonderharr been practicing?
Mark Vonderharr graduated from medical school in 2009, 17 years ago.
Selling to physician assistant practices?
See physician assistants 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