Dr. William Joseph Hernz, MD
- Part D claims, 2024
- 3,845
- Hospital affiliations
- 1
- Industry payments
- $568
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 414 Paoli Pike, Malvern, PA 19355
- Practice phone
- Call (484) 596-5400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hernz's professional email, personal email and mobile number
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Dr. William Joseph Hernz is a psychiatrist in Malvern, Pennsylvania
Dr. Hernz practices at Bryn Mawr Rehabilitation Hospital in Malvern, Pennsylvania, part of Main Line Health System.
Dr. Hernz's NPI, 1093727521, was assigned on August 13, 2006. Dr. Hernz holds Pennsylvania license MD041292L.
- NPI
- 1093727521NPI Registry (opens in a new tab)
- NPI enumeration date
- August 13, 2006
- NPI status
- Active
- Practice phone
- (484) 596-5400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William Joseph Hernz practices at Bryn Mawr Rehabilitation Hospital in Malvern, Pennsylvania
Dr. Hernz's primary practice is Bryn Mawr Rehabilitation Hospital, at 414 Paoli Pike, Malvern, PA 19355 in Chester County. The practice phone is (484) 596-5400.
- Bryn Mawr Rehabilitation Hospital414 Paoli Pike, Malvern, PA 19355 · Chester CountyPhone(484) 596-5400
Source: Dmand AI Affiliation Data
Dr. William Joseph Hernz is affiliated with 1 site of care
Dr. Hernz's primary practice is Bryn Mawr Rehabilitation Hospital in Malvern, Pennsylvania, part of Main Line Health System.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Joseph Hernz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hernz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bryn Mawr Rehabilitation Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Joseph Hernz is one of 1,873 psychiatrists in Pennsylvania
Psychiatry is Dr. Hernz's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Hernz is licensed in Pennsylvania.
Specialties and state licenses
- Psychiatry, PennsylvaniaPrimary
Psychiatrists near Dr. Hernz
Counts of psychiatrists 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
Dr. William Joseph Hernz's patients have a median age of 45
Across all payers, Dmand AI patient panel data puts Dr. Hernz's median patient age at 45, with 53% women.
Dr. Hernz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 45
Patient panel by sex, all payers
- Women53%
- Men43%
Source: Dmand AI Patient Panel Data
Dr. William Joseph Hernz wrote 3,845 Medicare Part D claims in 2024
In 2024, Dr. Hernz wrote 3,845 Medicare Part D claims for 261 patients. 94% of them were for generic drugs. CMS names the drug for 3,580 of them, across 68 drugs with 11 or more claims each, at $202,558 in total drug cost. In 2023, CMS named 3,205 claims across 56 drugs.
Dr. Hernz's Part D claims by kind of drug, 2024
- Generic3,604 claims94%
- Brand-name and other241 claims6%
Dr. Hernz's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Hernz's Part D claims, 2024
- Opioids1%22 of 3,845 claims
- Antipsychotics, patients 65 and over4%137 of 3,845 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,2052024: 3,58012%
Drugs named by CMS: 68 in 2024, 56 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. William Joseph Hernz received $568 in industry payments from 2017 to 2024
CMS Open Payments shows 23 general payments to Dr. Hernz from 4 drug and device companies from 2017 to 2024. Food and beverage make up the largest share, 95% of the total. Abbvie Inc. paid the most, $226.
General payments to Dr. Hernz by program year, 2017 to 2024
General payments to Dr. Hernz by kind, 2017 to 2024
- Food and beverage$53895%
- Education$305%
Companies that paid Dr. Hernz the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Joseph Hernz'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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (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 Dr. William Joseph Hernz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William Joseph Hernz's NPI number?
Dr. William Joseph Hernz's NPI number is 1093727521. It was assigned on August 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Joseph Hernz?
Dr. William Joseph Hernz is a psychiatrist in Malvern, Pennsylvania. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. William Joseph Hernz practice?
Dr. Hernz practices at 414 Paoli Pike, Malvern, PA 19355. Dr. Hernz's primary practice is Bryn Mawr Rehabilitation Hospital in Malvern, Pennsylvania, part of Main Line Health System.
What is Dr. William Joseph Hernz's office phone number?
The practice phone on file for Dr. Hernz is (484) 596-5400.
What is Dr. William Joseph Hernz's medical license number?
Dr. Hernz holds Pennsylvania license MD041292L.
Which hospitals is Dr. William Joseph Hernz affiliated with?
Dr. Hernz practices at Bryn Mawr Rehabilitation Hospital in Malvern, Pennsylvania.
What drugs does Dr. William Joseph Hernz prescribe most?
In 2024 Medicare Part D data, Dr. Hernz's most prescribed drugs by claims were Clonazepam, Lamotrigine and Alprazolam.
Has Dr. William Joseph Hernz received payments from drug or device companies?
CMS Open Payments shows $568 in general payments to Dr. Hernz from 4 companies from 2017 to 2024. The largest total came from Abbvie Inc.
How long has Dr. William Joseph Hernz been practicing?
Dr. Hernz's NPI was assigned in 2006.
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