Dr. Marcia Gina C. Castro, MD
- Medicare services, 2024
- 1,117
- Medicare patients, 2024
- 256
- Part D claims, 2024
- 11,265
- Hospital affiliations
- 2
- Industry payments
- $38,291
- Practice address
- 2055 Limestone Rd, Wilmington, DE 19808
- Practice phone
- Call (302) 565-4616
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
First State Medical Associates
Wilmington, Delaware
Find Dr. Castro'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. Marcia Gina C. Castro is an internist in Wilmington, Delaware
Dr. Castro practices at First State Medical Associates in Wilmington, Delaware.
Dr. Castro's NPI, 1407934789, was assigned on November 2, 2006. Dr. Castro holds Delaware license C10006460.
- NPI
- 1407934789NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1658313937
- NPI enumeration date
- November 2, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (302) 565-4616
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marcia Gina C. Castro practices at First State Medical Associates in Wilmington, Delaware
Dr. Castro's primary practice is First State Medical Associates, at 2055 Limestone Rd, Wilmington, DE 19808 in New Castle County. The practice phone is (302) 565-4616.
- First State Medical Associates2055 Limestone Rd, Wilmington, DE 19808 · New Castle CountyPhone(302) 565-4616
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Marcia Gina C. Castro is affiliated with 6 sites of care and 1 medical group
Dr. Castro's primary practice is First State Medical Associates in Wilmington, Delaware. Dr. Castro is also affiliated with Saint Francis Hospital. The medical group on file is First State Medical Associates. Dmand AI also links Dr. Castro to 1 more hospital, 2 home health agencies and 1 group practice or clinic, 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. Marcia Gina C. Castro's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Castro practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| First State Medical Associates | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marcia Gina C. Castro is one of 615 internists in Delaware
Internal medicine is Dr. Castro's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Castro is licensed in Delaware.
Specialties and state licenses
- Internal medicine, DelawarePrimary
Internists near Dr. Castro
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. Marcia Gina C. Castro billed Medicare for 1,117 services in 2024
CMS data shows 1,117 Medicare services from Dr. Castro across 7 procedure codes in 2024, for 256 Medicare patients. Medicare paid $93,203 for them. Every service was in an office.
Dr. Castro's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9792024: 9087%
- Other services
- 2023: 2092024: 18412%
- Tests and treatments
- 2023: 252024: 25No change
Dr. Castro compared with the Delaware median for internists, 2024
- Dr. Castro
- Delaware median
- Medicare services
- 1,117vs 68663% above
- Medicare patients
- 256vs 28711% below
- Part D claims
- 10,524vs 12484.9 times
Medians across 565 internists in Delaware with Dmand AI profiles that report each measure.
Dr. Castro'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. Castro and other internists in Delaware.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marcia Gina C. Castro treated 256 Medicare patients in 2024, average age 71
CMS counts 256 Medicare patients who saw Dr. Castro in 2024. The largest group is 65 to 74, with 118 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 29% are also on Medicaid. Their average risk score is 1.17, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Castro's median patient age at 64, with 82% women.
Dr. Castro's Medicare patients by age, 2024
Dr. Castro's Medicare patients by sex, 2024
- Women21383%
- Men4317%
Chronic conditions among Dr. Castro's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes41%
- Arthritis38%
- Mood disorders33%
- Depression31%
- Chronic kidney disease30%
- Anxiety18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Castro's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women82%
- Men16%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marcia Gina C. Castro wrote 11,265 Medicare Part D claims in 2024
In 2024, Dr. Castro wrote 11,265 Medicare Part D claims for 573 patients. 83% of them were for generic drugs. CMS names the drug for 10,524 of them, across 146 drugs with 11 or more claims each, at $1,458,729 in total drug cost. In 2023, CMS named 9,649 claims across 138 drugs.
Dr. Castro's Part D claims by kind of drug, 2024
- Generic9,327 claims83%
- Brand-name1,834 claims16%
- Other104 claims1%
Dr. Castro'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. Castro's Part D claims, 2024
- Opioids4%445 of 11,265 claims
- Antibiotics3%308 of 11,265 claims
- Antipsychotics, patients 65 and over1%66 of 11,265 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: 9,6492024: 10,5249%
Drugs named by CMS: 146 in 2024, 138 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. Marcia Gina C. Castro offers telehealth to Medicare patients
Dr. Castro accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Castro as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Marcia Gina C. Castro received $38,291 in industry payments from 2016 to 2025
CMS Open Payments shows 1,841 general payments to Dr. Castro from 61 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $5,318.
General payments to Dr. Castro by program year, 2016 to 2025
General payments to Dr. Castro by kind, 2016 to 2025
- Food and beverage$38,146100%
- Education$1450%
Companies that paid Dr. Castro the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Marcia Gina C. Castro'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) |
| 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. Marcia Gina C. Castro
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. Marcia Gina C. Castro's NPI number?
Dr. Marcia Gina C. Castro's NPI number is 1407934789. It was assigned on November 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Marcia Gina C. Castro?
Dr. Marcia Gina C. Castro is an internist in Wilmington, Delaware. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Marcia Gina C. Castro practice?
Dr. Castro practices at 2055 Limestone Rd, Wilmington, DE 19808. Dr. Castro's primary practice is First State Medical Associates in Wilmington, Delaware. Dmand AI also links Dr. Castro to 1 hospital, 2 home health agencies and 1 group practice or clinic.
What is Dr. Marcia Gina C. Castro's office phone number?
The practice phone on file for Dr. Castro is (302) 565-4616.
What is Dr. Marcia Gina C. Castro's medical license number?
Dr. Castro holds Delaware license C10006460.
Which hospitals is Dr. Marcia Gina C. Castro affiliated with?
Dr. Castro is affiliated with Saint Francis Hospital. Dmand AI links Dr. Castro to 1 more hospital.
What medical group is Dr. Marcia Gina C. Castro part of?
Dr. Castro is linked to First State Medical Associates.
Does Dr. Marcia Gina C. Castro accept Medicare?
Yes. CMS data shows Dr. Castro billed Medicare for 1,117 services in 2024, and Dr. Castro accepts Medicare assignment.
Does Dr. Marcia Gina C. Castro offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Castro as offering telehealth services.
How many Medicare patients does Dr. Marcia Gina C. Castro see?
CMS counts 256 Medicare patients who saw Dr. Castro in 2024, with an average age of 71.
Show 4 more questionsShow fewer questions
What services does Dr. Marcia Gina C. Castro bill to Medicare?
In 2024, Dr. Castro's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and medicare service (G0439).
What drugs does Dr. Marcia Gina C. Castro prescribe most?
In 2024 Medicare Part D data, Dr. Castro's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Omeprazole.
Has Dr. Marcia Gina C. Castro received payments from drug or device companies?
CMS Open Payments shows $38,291 in general payments to Dr. Castro from 61 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Marcia Gina C. Castro been practicing?
Dr. Castro graduated from medical school in 1993, 33 years ago.
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