Dr. Alonso Jose Marquez Fuenmayor, MD
- Part D claims, 2024
- 182
- Hospital affiliations
- 1
- Industry payments
- $2,152
- Medical groups
- 2
- State licenses
- 2
- Practice address
- 4755 Ogletown Stanton Road, Newark, DE 19713
- Practice phone
- Call (302) 320-2926
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
ChristianaCare Adult Outpatient Psychiatry & Therapy
Outpatient Mental Health Clinic · Newark, Delaware
Find Dr. Marquez Fuenmayor'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. Alonso Jose Marquez Fuenmayor is an internist in Newark, Delaware
Dr. Marquez Fuenmayor practices at ChristianaCare Adult Outpatient Psychiatry & Therapy in Newark, Delaware.
Dr. Marquez Fuenmayor's NPI, 1952928319, was assigned on July 1, 2020. Dr. Marquez Fuenmayor holds Illinois license 125075876.
- NPI
- 1952928319NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1759791155
- NPI enumeration date
- July 1, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (302) 320-2926
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alonso Jose Marquez Fuenmayor practices at ChristianaCare Adult Outpatient Psychiatry & Therapy in Newark, Delaware
Dr. Marquez Fuenmayor's primary practice is ChristianaCare Adult Outpatient Psychiatry & Therapy, at 4755 Ogletown Stanton Road, Newark, DE 19713. The practice phone is (302) 320-2926.
- ChristianaCare Adult Outpatient Psychiatry & Therapy4755 Ogletown Stanton Road, Newark, DE 19713Phone(302) 320-2926
Source: Dmand AI Affiliation Data
Dr. Alonso Jose Marquez Fuenmayor is affiliated with 5 sites of care and 2 medical groups
Dr. Marquez Fuenmayor's primary practice is ChristianaCare Adult Outpatient Psychiatry & Therapy in Newark, Delaware. Dr. Marquez Fuenmayor is also affiliated with Christiana Hospital. The medical group on file is ChristianaCare. Dmand AI also links Dr. Marquez Fuenmayor to 2 more group practices and clinics, 1 hospice and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alonso Jose Marquez Fuenmayor's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marquez Fuenmayor practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ChristianaCare Adult Outpatient Psychiatry & Therapy | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alonso Jose Marquez Fuenmayor is one of 615 internists in Delaware
Internal medicine is Dr. Marquez Fuenmayor's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Marquez Fuenmayor's licenses on file in 2 states: Illinois and Delaware.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
- Delaware license
Internists near Dr. Marquez Fuenmayor
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. Alonso Jose Marquez Fuenmayor's patients have a median age of 62
Across all payers, Dmand AI patient panel data puts Dr. Marquez Fuenmayor's median patient age at 62, with 63% women.
Dr. Marquez Fuenmayor'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
- Women63%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. Alonso Jose Marquez Fuenmayor wrote 182 Medicare Part D claims in 2024
In 2024, Dr. Marquez Fuenmayor wrote 182 Medicare Part D claims for 45 patients. 59% of them were for generic drugs. CMS names the drug for 80 of them, across 5 drugs with 11 or more claims each, at $22,499 in total drug cost. In 2023, CMS named 30 claims across 2 drugs.
Dr. Marquez Fuenmayor's Part D claims by kind of drug, 2024
- Generic107 claims59%
- Brand-name and other75 claims41%
Dr. Marquez Fuenmayor'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. Marquez Fuenmayor's Part D claims, 2024
- Antibiotics10%19 of 182 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: 302024: 80167%
Drugs named by CMS: 5 in 2024, 2 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
How Dr. Alonso Jose Marquez Fuenmayor takes part in Medicare
Dr. Marquez Fuenmayor 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)
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Dr. Alonso Jose Marquez Fuenmayor received $2,152 in industry payments from 2023 to 2025
CMS Open Payments shows 19 general payments to Dr. Marquez Fuenmayor from 10 drug and device companies from 2023 to 2025. Travel and lodging make up the largest share, 63% of the total. Medical Device Business Services, Inc. paid the most, $1,316.
General payments to Dr. Marquez Fuenmayor by program year, 2023 to 2025
General payments to Dr. Marquez Fuenmayor by kind, 2023 to 2025
- Travel and lodging$1,36463%
- Food and beverage$78837%
Companies that paid Dr. Marquez Fuenmayor the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Alonso Jose Marquez Fuenmayor'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) |
| 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. Alonso Jose Marquez Fuenmayor
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. Alonso Jose Marquez Fuenmayor's NPI number?
Dr. Alonso Jose Marquez Fuenmayor's NPI number is 1952928319. It was assigned on July 1, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Alonso Jose Marquez Fuenmayor?
Dr. Alonso Jose Marquez Fuenmayor is an internist in Newark, Delaware. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Alonso Jose Marquez Fuenmayor practice?
Dr. Marquez Fuenmayor practices at 4755 Ogletown Stanton Road, Newark, DE 19713. Dr. Marquez Fuenmayor's primary practice is ChristianaCare Adult Outpatient Psychiatry & Therapy in Newark, Delaware. Dmand AI also links Dr. Marquez Fuenmayor to 2 group practices and clinics, 1 hospice and 1 medical group.
What is Dr. Alonso Jose Marquez Fuenmayor's office phone number?
The practice phone on file for Dr. Marquez Fuenmayor is (302) 320-2926.
What is Dr. Alonso Jose Marquez Fuenmayor's medical license number?
Dr. Marquez Fuenmayor holds Illinois license 125075876, one of the licenses on file in 2 states.
Which states has Dr. Alonso Jose Marquez Fuenmayor been licensed in?
Dmand AI has state licenses on file for Dr. Marquez Fuenmayor in Illinois and Delaware.
Which hospitals is Dr. Alonso Jose Marquez Fuenmayor affiliated with?
Dr. Marquez Fuenmayor is affiliated with Christiana Hospital.
What medical group is Dr. Alonso Jose Marquez Fuenmayor part of?
Dr. Marquez Fuenmayor is linked to ChristianaCare. Dmand AI links Dr. Marquez Fuenmayor to 1 more medical group.
Does Dr. Alonso Jose Marquez Fuenmayor accept Medicare?
Yes. CMS lists Dr. Marquez Fuenmayor as accepting Medicare assignment.
What drugs does Dr. Alonso Jose Marquez Fuenmayor prescribe most?
In 2024 Medicare Part D data, Dr. Marquez Fuenmayor's most prescribed drugs by claims were Albuterol Sulfate Hfa, Anoro Ellipta and Tacrolimus.
Has Dr. Alonso Jose Marquez Fuenmayor received payments from drug or device companies?
CMS Open Payments shows $2,152 in general payments to Dr. Marquez Fuenmayor from 10 companies from 2023 to 2025. The largest total came from Medical Device Business Services, Inc.
How long has Dr. Alonso Jose Marquez Fuenmayor been practicing?
Dr. Marquez Fuenmayor graduated from medical school in 2015, 11 years ago.
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