Dr. William Benjamin Feldmann, MD
- Medicare services, 2024
- 4,100
- Medicare patients, 2024
- 355
- Part D claims, 2024
- 3,833
- Hospital affiliations
- 3
- State license
- 1
- Practice address
- 22 Main St, Salem, NH 03079
- Practice phone
- Call (603) 893-7905
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Azar a Korbey MD
Salem, New Hampshire
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Dr. William Benjamin Feldmann is an internist in Salem, New Hampshire
Dr. Feldmann practices at Azar a Korbey MD in Salem, New Hampshire.
Dr. Feldmann's NPI, 1508821984, was assigned on April 19, 2006. Dr. Feldmann graduated from State University of New York Downstate Medical Center in 1991. Dr. Feldmann holds New Hampshire license 9800.
- NPI
- 1508821984NPI Registry (opens in a new tab)
- NPI enumeration date
- April 19, 2006
- NPI status
- Active
- Practice phone
- (603) 893-7905
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. William Benjamin Feldmann practices at Azar a Korbey MD in Salem, New Hampshire
Dr. Feldmann's primary practice is Azar a Korbey MD, at 22 Main St, Salem, NH 03079 in Rockingham County. The practice phone is (603) 893-7905.
- Azar a Korbey MD22 Main St, Salem, NH 03079 · Rockingham CountyPhone(603) 893-7905
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William Benjamin Feldmann is affiliated with 4 sites of care
Dr. Feldmann's primary practice is Azar a Korbey MD in Salem, New Hampshire. Dr. Feldmann is also affiliated with Lahey Clinic. Dmand AI also links Dr. Feldmann to 2 more hospitals, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Benjamin Feldmann's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Feldmann practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Azar a Korbey MD | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Benjamin Feldmann is one of 577 internists in New Hampshire
Internal medicine is Dr. Feldmann's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Feldmann is licensed in New Hampshire.
Specialties and state licenses
- Internal medicine, New HampshirePrimary
Internists near Dr. Feldmann
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 Benjamin Feldmann billed Medicare for 4,100 services in 2024
CMS data shows 4,100 Medicare services from Dr. Feldmann across 37 procedure codes in 2024, for 355 Medicare patients. Medicare paid $102,128 for them. Every service was in an office.
Dr. Feldmann's Medicare services by type, 2024
- Lab and pathology2,781
- Office and hospital visits626
- Surgery389
- Other services228
- Tests and treatments76
Dr. Feldmann compared with the New Hampshire median for internists, 2024
- Dr. Feldmann
- New Hampshire median
- Medicare services
- 4,100vs 4309.5 times
- Medicare patients
- 355vs 23154% above
- Part D claims
- 3,315vs 17918.5 times
Medians across 583 internists in New Hampshire with Dmand AI profiles that report each measure.
Dr. Feldmann's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Benjamin Feldmann treated 355 Medicare patients in 2024, average age 74
CMS counts 355 Medicare patients who saw Dr. Feldmann in 2024. The largest group is 65 to 74, with 180 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 0.87, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Feldmann's median patient age at 66, with 45% women.
Dr. Feldmann's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Feldmann's Medicare patients by sex, 2024
- Women18753%
- Men16847%
Chronic conditions among Dr. Feldmann's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis40%
- Chronic kidney disease26%
- Ischemic heart disease24%
- Diabetes23%
- Anxiety17%
- Atrial fibrillation17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Feldmann's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women45%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Benjamin Feldmann wrote 3,833 Medicare Part D claims in 2024
In 2024, Dr. Feldmann wrote 3,833 Medicare Part D claims for 309 patients. 86% of them were for generic drugs. CMS names the drug for 3,315 of them, across 79 drugs with 11 or more claims each, at $224,887 in total drug cost.
Dr. Feldmann's Part D claims by kind of drug, 2024
- Generic3,303 claims86%
- Brand-name514 claims13%
- Other16 claims0%
Dr. Feldmann'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. Feldmann's Part D claims, 2024
- Opioids3%101 of 3,833 claims
- Antibiotics2%74 of 3,833 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
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Dr. William Benjamin Feldmann graduated from State University of New York Downstate Medical Center
Dr. Feldmann graduated from State University of New York Downstate Medical Center in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Benjamin Feldmann'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 DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| 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 Benjamin Feldmann
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What is Dr. William Benjamin Feldmann's NPI number?
Dr. William Benjamin Feldmann's NPI number is 1508821984. It was assigned on April 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Benjamin Feldmann?
Dr. William Benjamin Feldmann is an internist in Salem, New Hampshire. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William Benjamin Feldmann practice?
Dr. Feldmann practices at 22 Main St, Salem, NH 03079. Dr. Feldmann's primary practice is Azar a Korbey MD in Salem, New Hampshire. Dmand AI also links Dr. Feldmann to 2 hospitals.
What is Dr. William Benjamin Feldmann's office phone number?
The practice phone on file for Dr. Feldmann is (603) 893-7905.
What is Dr. William Benjamin Feldmann's medical license number?
Dr. Feldmann holds New Hampshire license 9800.
Which hospitals is Dr. William Benjamin Feldmann affiliated with?
Dr. Feldmann is affiliated with Lahey Clinic. Dmand AI links Dr. Feldmann to 2 more hospitals.
Does Dr. William Benjamin Feldmann accept Medicare?
Yes. CMS data shows Dr. Feldmann billed Medicare for 4,100 services in 2024.
How many Medicare patients does Dr. William Benjamin Feldmann see?
CMS counts 355 Medicare patients who saw Dr. Feldmann in 2024, with an average age of 74.
What services does Dr. William Benjamin Feldmann bill to Medicare?
In 2024, Dr. Feldmann's most billed Medicare services were office visit, established patient (99213), surgery: heart and blood vessels (36415) and lab and pathology test (85025).
Where did Dr. William Benjamin Feldmann go to medical school?
Dr. Feldmann graduated from State University of New York Downstate Medical Center in 1991.
What drugs does Dr. William Benjamin Feldmann prescribe most?
In 2024 Medicare Part D data, Dr. Feldmann's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Lisinopril.
How long has Dr. William Benjamin Feldmann been practicing?
Dr. Feldmann graduated from medical school in 1991, 35 years ago.
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