Dr. William Haffner, MD
- Part D claims, 2024
- 164
- Hospital affiliations
- 1
- Industry payments
- $18
- Medical group
- 1
- State license
- 1
- Practice address
- 1840 Amherst St, Winchester, VA 22601
- Practice phone
- Call (540) 536-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Haffner'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 Haffner is a family medicine physician in Winchester, Virginia
Dr. Haffner practices at Winchester Medical Center in Winchester, Virginia, part of Valley Health.
Dr. Haffner's NPI, 1033853056, was assigned on April 26, 2022. Dr. Haffner graduated from University of Arkansas College of Medicine in 2025. Dr. Haffner holds Virginia license 0101287427.
- NPI
- 1033853056NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305335308
- NPI enumeration date
- April 26, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (540) 536-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 27
- Medical school graduation
- 2025
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Haffner practices at Winchester Medical Center in Winchester, Virginia
Dr. Haffner's primary practice is Winchester Medical Center, at 1840 Amherst St, Winchester, VA 22601 in Winchester City. The practice phone is (540) 536-8000.
- Winchester Medical Center1840 Amherst St, Winchester, VA 22601 · Winchester CityPhone(540) 536-8000
Source: Dmand AI Affiliation Data
Dr. William Haffner is affiliated with 2 sites of care and 1 medical group
Dr. Haffner's primary practice is Winchester Medical Center in Winchester, Virginia, part of Valley Health. The medical group on file is Valley Health. Dmand AI also links Dr. Haffner to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Haffner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Haffner practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Winchester Medical Center | Available with a free account |
| +1 more affiliated site | 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 Valley Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William Haffner is one of 3,459 family medicine physicians in Virginia
Family medicine is Dr. Haffner's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Haffner is licensed in Virginia.
Specialties and state licenses
- Family medicine, VirginiaPrimary
Family medicine physicians near Dr. Haffner
Counts of family medicine physicians 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 Haffner's patients have a median age of 48
Across all payers, Dmand AI patient panel data puts Dr. Haffner's median patient age at 48, with 52% women.
Dr. Haffner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women52%
- Men48%
Source: Dmand AI Patient Panel Data
Dr. William Haffner wrote 164 Medicare Part D claims in 2024
In 2024, Dr. Haffner wrote 164 Medicare Part D claims for 55 patients. 88% of them were for generic drugs. CMS names the drug for 24 of them, across 2 drugs with 11 or more claims each, at $307 in total drug cost.
Dr. Haffner's Part D claims by kind of drug, 2024
- Generic145 claims88%
- Brand-name and other19 claims12%
Dr. Haffner'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. Haffner's Part D claims, 2024
- Antibiotics10%16 of 164 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
How Dr. William Haffner takes part in Medicare
Dr. Haffner 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.
Dr. William Haffner received $18 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Haffner from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $18.
Companies that paid Dr. Haffner the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Haffner graduated from University of Arkansas College of Medicine
Dr. Haffner graduated from University of Arkansas College of Medicine in 2025.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Haffner'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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 Dr. William Haffner
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 Haffner's NPI number?
Dr. William Haffner's NPI number is 1033853056. It was assigned on April 26, 2022, and it is active in the NPI Registry.
What kind of doctor is Dr. William Haffner?
Dr. William Haffner is a family medicine physician in Winchester, Virginia. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. William Haffner practice?
Dr. Haffner practices at 1840 Amherst St, Winchester, VA 22601. Dr. Haffner's primary practice is Winchester Medical Center in Winchester, Virginia, part of Valley Health. Dmand AI also links Dr. Haffner to 1 group practice or clinic.
What is Dr. William Haffner's office phone number?
The practice phone on file for Dr. Haffner is (540) 536-8000.
What is Dr. William Haffner's medical license number?
Dr. Haffner holds Virginia license 0101287427.
Which hospitals is Dr. William Haffner affiliated with?
Dr. Haffner practices at Winchester Medical Center in Winchester, Virginia.
What medical group is Dr. William Haffner part of?
Dr. Haffner is linked to Valley Health.
Does Dr. William Haffner accept Medicare?
Yes. CMS lists Dr. Haffner as accepting Medicare assignment.
Where did Dr. William Haffner go to medical school?
Dr. Haffner graduated from University of Arkansas College of Medicine in 2025.
What drugs does Dr. William Haffner prescribe most?
In 2024 Medicare Part D data, Dr. Haffner's most prescribed drugs by claims were Atorvastatin Calcium and Losartan Potassium.
Has Dr. William Haffner received payments from drug or device companies?
CMS Open Payments shows $18 in general payments to Dr. Haffner from 1 company from 2025 to 2025. The largest total came from Pfizer Inc.
How long has Dr. William Haffner been practicing?
Dr. Haffner graduated from medical school in 2025, 1 years ago.
Selling to family medicine practices?
See family medicine physicians in Virginia 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