Dr. Stuart Felzer, MD
- Medicare services, 2024
- 1,049
- Medicare patients, 2024
- 290
- Part D claims, 2024
- 7,336
- Hospital affiliations
- 2
- Industry payments
- $9,036
- Practice address
- 4512 Kirkwood Hwy, Wilmington, DE 19808
- Practice phone
- Call (302) 660-7302
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Delaware Medical Group
Wilmington, Delaware
Find Dr. Felzer's professional email, personal email and mobile number
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Dr. Stuart Felzer is an internist in Wilmington, Delaware
Dr. Felzer practices at Delaware Medical Group in Wilmington, Delaware.
Dr. Felzer's NPI, 1508804402, was assigned on June 3, 2006. Dr. Felzer graduated from Temple University School of Medicine in 1982. Dr. Felzer holds Delaware license C10003025.
- NPI
- 1508804402NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406841642
- NPI enumeration date
- June 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (302) 660-7302
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stuart Felzer practices at Delaware Medical Group in Wilmington, Delaware
Dr. Felzer's primary practice is Delaware Medical Group, at 4512 Kirkwood Hwy, Wilmington, DE 19808 in New Castle County. The practice phone is (302) 660-7302.
- Delaware Medical Group4512 Kirkwood Hwy, Wilmington, DE 19808 · New Castle CountyPhone(302) 660-7302
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stuart Felzer is affiliated with 7 sites of care and 2 medical groups
Dr. Felzer's primary practice is Delaware Medical Group in Wilmington, Delaware. Dr. Felzer is also affiliated with Hospital of the University of Pennsylvania. The medical group on file is Delaware Medical Group. Dmand AI also links Dr. Felzer to 1 more hospital, 2 group practices and clinics, 2 home health agencies and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Stuart Felzer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Felzer practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Delaware Medical Group | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stuart Felzer is one of 615 internists in Delaware
Internal medicine is Dr. Felzer's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Felzer is licensed in Delaware.
Specialties and state licenses
- Internal medicine, DelawarePrimary
Internists near Dr. Felzer
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. Stuart Felzer billed Medicare for 1,049 services in 2024
CMS data shows 1,049 Medicare services from Dr. Felzer across 11 procedure codes in 2024, for 290 Medicare patients. Medicare paid $63,076 for them. Every service was in an office.
Dr. Felzer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5762024: 5672%
- Other services
- 2023: 1882024: 22017%
- Tests and treatments
- 2023: 1952024: 21510%
- Lab and pathology
- 2023: 272024: 4774%
Dr. Felzer compared with the Delaware median for internists, 2024
- Dr. Felzer
- Delaware median
- Medicare services
- 1,049vs 68653% above
- Medicare patients
- 290vs 287Close to median
- Part D claims
- 6,602vs 12453.2 times
Medians across 565 internists in Delaware with Dmand AI profiles that report each measure.
Dr. Felzer'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Felzer and other internists in Delaware.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stuart Felzer treated 290 Medicare patients in 2024, average age 79
CMS counts 290 Medicare patients who saw Dr. Felzer in 2024. The largest group is 75 to 84, with 135 patients. 75% of them have high cholesterol, and 71% have high blood pressure. Their average risk score is 0.93, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Felzer's median patient age at 76, with 50% women.
Dr. Felzer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Felzer's Medicare patients by sex, 2024
- Women16055%
- Men13045%
Chronic conditions among Dr. Felzer's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis50%
- Osteoporosis27%
- Diabetes23%
- Anxiety21%
- Atrial fibrillation18%
- Ischemic heart disease18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Felzer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stuart Felzer wrote 7,336 Medicare Part D claims in 2024
In 2024, Dr. Felzer wrote 7,336 Medicare Part D claims for 353 patients. 83% of them were for generic drugs. CMS names the drug for 6,602 of them, across 142 drugs with 11 or more claims each, at $835,387 in total drug cost. In 2023, CMS named 6,648 claims across 136 drugs.
Dr. Felzer's Part D claims by kind of drug, 2024
- Generic6,081 claims83%
- Brand-name1,206 claims16%
- Other49 claims1%
Dr. Felzer'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. Felzer's Part D claims, 2024
- Opioids4%293 of 7,336 claims
- Antibiotics5%350 of 7,336 claims
- Antipsychotics, patients 65 and over1%44 of 7,336 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: 6,6482024: 6,6021%
Drugs named by CMS: 142 in 2024, 136 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
Dr. Stuart Felzer offers telehealth to Medicare patients
Dr. Felzer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Felzer as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Stuart Felzer received $9,036 in industry payments from 2016 to 2025
CMS Open Payments shows 535 general payments to Dr. Felzer from 42 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Eli Lilly and Company paid the most, $1,050.
General payments to Dr. Felzer by program year, 2016 to 2025
General payments to Dr. Felzer by kind, 2016 to 2025
- Food and beverage$8,76497%
- Education$2733%
Companies that paid Dr. Felzer the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stuart Felzer graduated from Temple University School of Medicine
Dr. Felzer graduated from Temple University School of Medicine in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stuart Felzer'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 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) |
| 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. Stuart Felzer
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. Stuart Felzer's NPI number?
Dr. Stuart Felzer's NPI number is 1508804402. It was assigned on June 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stuart Felzer?
Dr. Stuart Felzer is an internist in Wilmington, Delaware. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Stuart Felzer practice?
Dr. Felzer practices at 4512 Kirkwood Hwy, Wilmington, DE 19808. Dr. Felzer's primary practice is Delaware Medical Group in Wilmington, Delaware. Dmand AI also links Dr. Felzer to 1 hospital, 2 group practices and clinics, 2 home health agencies and 1 medical group.
What is Dr. Stuart Felzer's office phone number?
The practice phone on file for Dr. Felzer is (302) 660-7302.
What is Dr. Stuart Felzer's medical license number?
Dr. Felzer holds Delaware license C10003025.
Which hospitals is Dr. Stuart Felzer affiliated with?
Dr. Felzer is affiliated with Hospital of the University of Pennsylvania. Dmand AI links Dr. Felzer to 1 more hospital.
What medical group is Dr. Stuart Felzer part of?
Dr. Felzer is linked to Delaware Medical Group. Dmand AI links Dr. Felzer to 1 more medical group.
Does Dr. Stuart Felzer accept Medicare?
Yes. CMS data shows Dr. Felzer billed Medicare for 1,049 services in 2024, and Dr. Felzer accepts Medicare assignment.
Does Dr. Stuart Felzer offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Felzer as offering telehealth services.
How many Medicare patients does Dr. Stuart Felzer see?
CMS counts 290 Medicare patients who saw Dr. Felzer in 2024, with an average age of 79.
Show 5 more questionsShow fewer questions
What services does Dr. Stuart Felzer bill to Medicare?
In 2024, Dr. Felzer's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and medicare service (G0008).
Where did Dr. Stuart Felzer go to medical school?
Dr. Felzer graduated from Temple University School of Medicine in 1982.
What drugs does Dr. Stuart Felzer prescribe most?
In 2024 Medicare Part D data, Dr. Felzer's most prescribed drugs by claims were Levothyroxine Sodium, Amlodipine Besylate and Atorvastatin Calcium.
Has Dr. Stuart Felzer received payments from drug or device companies?
CMS Open Payments shows $9,036 in general payments to Dr. Felzer from 42 companies from 2016 to 2025. The largest total came from Eli Lilly and Company.
How long has Dr. Stuart Felzer been practicing?
Dr. Felzer graduated from medical school in 1982, 44 years ago.
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