Dr. Daniel Ryan Feldman, DO, MPH
- Part D claims, 2024
- 338
- Hospital affiliations
- 1
- Industry payments
- $495
- Medical group
- 1
- State license
- 1
- Practice address
- 501 W 14th St, Wilmington, DE 19801
- Practice phone
- Call (302) 733-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
ChristianaCare Wilmington Hospital
Wilmington, Delaware
Find Dr. Feldman'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. Daniel Ryan Feldman is an internist in Wilmington, Delaware
Dr. Feldman practices at ChristianaCare Wilmington Hospital in Wilmington, Delaware.
Dr. Feldman's NPI, 1689323578, was assigned on March 20, 2022. Dr. Feldman graduated from Rowan University School of Osteopathic Medicine in 2022. Dr. Feldman holds Delaware license C2-0024408.
- NPI
- 1689323578NPI Registry (opens in a new tab)
- NPI enumeration date
- March 20, 2022
- NPI status
- Active
- Practice phone
- (302) 733-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 30
- Medical school graduation
- 2022
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Daniel Ryan Feldman practices at ChristianaCare Wilmington Hospital in Wilmington, Delaware
Dr. Feldman's primary practice is ChristianaCare Wilmington Hospital, at 501 W 14th St, Wilmington, DE 19801 in New Castle County. The practice phone is (302) 733-1000.
- ChristianaCare Wilmington Hospital501 W 14th St, Wilmington, DE 19801 · New Castle CountyPhone(302) 733-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Daniel Ryan Feldman is affiliated with 2 sites of care and 1 medical group
Dr. Feldman's primary practice is ChristianaCare Wilmington Hospital in Wilmington, Delaware. Dr. Feldman is also affiliated with Christiana Hospital. The medical group on file is ChristianaCare.
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. Daniel Ryan Feldman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Feldman practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ChristianaCare Wilmington Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Daniel Ryan Feldman is one of 615 internists in Delaware
Internal medicine is Dr. Feldman's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Feldman is licensed in Delaware.
Specialties and state licenses
- Internal medicine, DelawarePrimary
Internists near Dr. Feldman
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. Daniel Ryan Feldman's patients have a median age of 62
Across all payers, Dmand AI patient panel data puts Dr. Feldman's median patient age at 62, with 70% women.
Dr. Feldman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women70%
- Men30%
Source: Dmand AI Patient Panel Data
Dr. Daniel Ryan Feldman wrote 338 Medicare Part D claims in 2024
In 2024, Dr. Feldman wrote 338 Medicare Part D claims for 63 patients. 83% of them were for generic drugs. CMS names the drug for 186 of them, across 11 drugs with 11 or more claims each, at $97,171 in total drug cost.
Dr. Feldman's Part D claims by kind of drug, 2024
- Generic282 claims83%
- Brand-name and other56 claims17%
Dr. Feldman'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.
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. Daniel Ryan Feldman received $495 in industry payments from 2024 to 2025
CMS Open Payments shows 14 general payments to Dr. Feldman from 8 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 83% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $141.
General payments to Dr. Feldman by program year, 2024 to 2025
General payments to Dr. Feldman by kind, 2024 to 2025
- Food and beverage$41083%
- Education$8517%
Companies that paid Dr. Feldman the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Daniel Ryan Feldman graduated from Rowan University School of Osteopathic Medicine
Dr. Feldman graduated from Rowan University School of Osteopathic Medicine in 2022.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Daniel Ryan Feldman'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 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) |
| 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. Daniel Ryan Feldman
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What is Dr. Daniel Ryan Feldman's NPI number?
Dr. Daniel Ryan Feldman's NPI number is 1689323578. It was assigned on March 20, 2022, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel Ryan Feldman?
Dr. Daniel Ryan Feldman is an internist in Wilmington, Delaware. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Daniel Ryan Feldman practice?
Dr. Feldman practices at 501 W 14th St, Wilmington, DE 19801. Dr. Feldman's primary practice is ChristianaCare Wilmington Hospital in Wilmington, Delaware.
What is Dr. Daniel Ryan Feldman's office phone number?
The practice phone on file for Dr. Feldman is (302) 733-1000.
What is Dr. Daniel Ryan Feldman's medical license number?
Dr. Feldman holds Delaware license C2-0024408.
Which hospitals is Dr. Daniel Ryan Feldman affiliated with?
Dr. Feldman is affiliated with Christiana Hospital.
What medical group is Dr. Daniel Ryan Feldman part of?
Dr. Feldman is linked to ChristianaCare.
Where did Dr. Daniel Ryan Feldman go to medical school?
Dr. Feldman graduated from Rowan University School of Osteopathic Medicine in 2022.
What drugs does Dr. Daniel Ryan Feldman prescribe most?
In 2024 Medicare Part D data, Dr. Feldman's most prescribed drugs by claims were Atorvastatin Calcium, Gabapentin and Amlodipine Besylate.
Has Dr. Daniel Ryan Feldman received payments from drug or device companies?
CMS Open Payments shows $495 in general payments to Dr. Feldman from 8 companies from 2024 to 2025. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).
How long has Dr. Daniel Ryan Feldman been practicing?
Dr. Feldman graduated from medical school in 2022, 4 years ago.
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