Dr. William Hirschfeld, MD
- Industry payments
- $76
- State license
- 1
- Year NPI issued
- 2020
- Practice address
- 4650 Taylor Rd, Bethesda, MD 20889
- Practice phone
- Call (301) 295-2123
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Bethesda Main Phcy
Bethesda, Maryland
Find Dr. Hirschfeld'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.
Dr. William Hirschfeld is an internist in Bethesda, Maryland
Dr. Hirschfeld practices at Bethesda Main Phcy in Bethesda, Maryland.
Dr. Hirschfeld's NPI, 1134749096, was assigned on April 21, 2020. Dr. Hirschfeld holds Virginia license 0101274504.
- NPI
- 1134749096NPI Registry (opens in a new tab)
- NPI enumeration date
- April 21, 2020
- NPI status
- Active
- Practice phone
- (301) 295-2123
- 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 Practice Data
Dr. William Hirschfeld practices at Bethesda Main Phcy in Bethesda, Maryland
Dr. Hirschfeld's primary practice is Bethesda Main Phcy, at 4650 Taylor Rd, Bethesda, MD 20889 in Montgomery County. The practice phone is (301) 295-2123.
- Bethesda Main Phcy4650 Taylor Rd, Bethesda, MD 20889 · Montgomery CountyPhone(301) 295-2123
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William Hirschfeld is affiliated with 1 site of care
Dr. Hirschfeld's primary practice is Bethesda Main Phcy in Bethesda, Maryland.
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. William Hirschfeld's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hirschfeld practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bethesda Main Phcy | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Hirschfeld is one of 3,320 internists in Maryland
Internal medicine is Dr. Hirschfeld's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Hirschfeld is licensed in Virginia.
Specialties and state licenses
- Internal medicine, VirginiaPrimary
Internists near Dr. Hirschfeld
Counts of internists 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 Hirschfeld's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Hirschfeld's median patient age at 68, with 17% women.
Dr. Hirschfeld's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women17%
- Men83%
Source: Dmand AI Patient Panel Data
Dr. William Hirschfeld received $76 in industry payments from 2024 to 2025
CMS Open Payments shows 3 general payments to Dr. Hirschfeld from 2 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Abiomed paid the most, $61.
General payments to Dr. Hirschfeld by program year, 2024 to 2025
Companies that paid Dr. Hirschfeld the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Hirschfeld'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 Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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 Hirschfeld
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What is Dr. William Hirschfeld's NPI number?
Dr. William Hirschfeld's NPI number is 1134749096. It was assigned on April 21, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. William Hirschfeld?
Dr. William Hirschfeld is an internist in Bethesda, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William Hirschfeld practice?
Dr. Hirschfeld practices at 4650 Taylor Rd, Bethesda, MD 20889. Dr. Hirschfeld's primary practice is Bethesda Main Phcy in Bethesda, Maryland.
What is Dr. William Hirschfeld's office phone number?
The practice phone on file for Dr. Hirschfeld is (301) 295-2123.
What is Dr. William Hirschfeld's medical license number?
Dr. Hirschfeld holds Virginia license 0101274504.
Has Dr. William Hirschfeld received payments from drug or device companies?
CMS Open Payments shows $76 in general payments to Dr. Hirschfeld from 2 companies from 2024 to 2025. The largest total came from Abiomed.
How long has Dr. William Hirschfeld been practicing?
Dr. Hirschfeld's NPI was assigned in 2020.
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