Dr. Gregory C. Castello, DO
- Medicare services, 2024
- 34,718
- Medicare patients, 2024
- 197
- Part D claims, 2024
- 1,321
- MIPS score, 2024
- 75
- Hospital affiliations
- 3
- Practice address
- 25 North Winfield Road, Winfield, IL 60190
- Practice phone
- Call (630) 682-1600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Castello'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. Gregory C. Castello is a family medicine physician in Winfield, Illinois
Dr. Castello practices at Northwestern Medicine Central DuPage Hospital in Winfield, Illinois, part of Northwestern Memorial HealthCare.
Dr. Castello's NPI, 1417939323, was assigned on November 16, 2005. Dr. Castello graduated from Midwestern University, Chicago College of Osteopathic Med in 1993. Dr. Castello holds Illinois license 036091537.
- NPI
- 1417939323NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0446283980
- NPI enumeration date
- November 16, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (630) 682-1600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory C. Castello practices at Northwestern Medicine Central DuPage Hospital in Winfield, Illinois
Dr. Castello's primary practice is Northwestern Medicine Central DuPage Hospital, at 25 North Winfield Road, Winfield, IL 60190 in Du Page County. The practice phone is (630) 682-1600.
- Northwestern Medicine Central DuPage Hospital25 North Winfield Road, Winfield, IL 60190 · Du Page CountyPhone(630) 682-1600
Source: Dmand AI Affiliation Data
Dr. Gregory C. Castello is affiliated with 6 sites of care and 2 medical groups
Dr. Castello's primary practice is Northwestern Medicine Central DuPage Hospital in Winfield, Illinois, part of Northwestern Memorial HealthCare. Dr. Castello is also affiliated with Edward Hospital. The medical group on file is Northwestern Medicine Central DuPage Hospital. Dmand AI also links Dr. Castello to 1 more hospital, 1 breast imaging center, 1 clinical lab, 1 home health agency and 1 medical group, each named with a free account. Dr. Castello's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory C. Castello's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Castello practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Medicine Central DuPage Hospital | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory C. Castello is one of 5,105 family medicine physicians in Illinois
Family medicine is Dr. Castello's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Castello is licensed in Illinois.
Specialties and state licenses
- Family medicine, IllinoisPrimary
Family medicine physicians near Dr. Castello
Counts of family medicine physicians 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. Gregory C. Castello billed Medicare for 34,718 services in 2024
CMS data shows 34,718 Medicare services from Dr. Castello across 7 procedure codes in 2024, for 197 Medicare patients. Medicare paid $295,965 for them. Every service was in an office.
Dr. Castello's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 31,9542024: 32,6122%
- Surgery
- 2023: 8902024: 8445%
- Imaging
- 2023: 8882024: 8178%
- Office and hospital visits
- 2023: 4322024: 3988%
- Other services
- 2023: 462024: 472%
Dr. Castello compared with the Illinois median for family medicine physicians, 2024
- Dr. Castello
- Illinois median
- Medicare services
- 34,718vs 35697.5 times
- Medicare patients
- 197vs 16023% above
- Part D claims
- 1,002vs 61862% above
Medians across 5,015 family medicine physicians in Illinois with Dmand AI profiles that report each measure.
Dr. Castello'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. Gregory C. Castello treated 197 Medicare patients in 2024, average age 77
CMS counts 197 Medicare patients who saw Dr. Castello in 2024. The largest group is 75 to 84, with 82 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Castello's median patient age at 64, with 40% women.
Dr. Castello's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Castello's Medicare patients by sex, 2024
- Women9347%
- Men10453%
Chronic conditions among Dr. Castello's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis74%
- Diabetes35%
- Ischemic heart disease35%
- Chronic kidney disease27%
- Cancer23%
- Anxiety20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Castello'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
- Women40%
- Men59%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory C. Castello wrote 1,321 Medicare Part D claims in 2024
In 2024, Dr. Castello wrote 1,321 Medicare Part D claims for 122 patients. 87% of them were for generic drugs. CMS names the drug for 1,002 of them, across 33 drugs with 11 or more claims each, at $129,835 in total drug cost. In 2023, CMS named 848 claims across 28 drugs.
Dr. Castello's Part D claims by kind of drug, 2024
- Generic1,148 claims87%
- Brand-name and other173 claims13%
Dr. Castello'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. Castello's Part D claims, 2024
- Opioids1%15 of 1,321 claims
- Antibiotics2%32 of 1,321 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: 8482024: 1,00218%
Drugs named by CMS: 33 in 2024, 28 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. Gregory C. Castello scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Castello for performance year 2024, reported individually. Dr. Castello accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Castello as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- MIPS final score, 2024
- 75 of 100
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gregory C. Castello received $7,863 in industry payments from 2016 to 2025
CMS Open Payments shows 332 general payments to Dr. Castello from 27 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, $2,547.
General payments to Dr. Castello by program year, 2016 to 2025
General payments to Dr. Castello by kind, 2016 to 2025
- Food and beverage$7,835100%
- Education$280%
Companies that paid Dr. Castello 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. Gregory C. Castello graduated from Midwestern University, Chicago College of Osteopathic Med
Dr. Castello graduated from Midwestern University, Chicago College of Osteopathic Med in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory C. Castello'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 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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. Gregory C. Castello
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. Gregory C. Castello's NPI number?
Dr. Gregory C. Castello's NPI number is 1417939323. It was assigned on November 16, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory C. Castello?
Dr. Gregory C. Castello is a family medicine physician in Winfield, Illinois. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Gregory C. Castello practice?
Dr. Castello practices at 25 North Winfield Road, Winfield, IL 60190. Dr. Castello's primary practice is Northwestern Medicine Central DuPage Hospital in Winfield, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Castello to 1 hospital, 1 breast imaging center, 1 clinical lab, 1 home health agency and 1 medical group.
What is Dr. Gregory C. Castello's office phone number?
The practice phone on file for Dr. Castello is (630) 682-1600.
What is Dr. Gregory C. Castello's medical license number?
Dr. Castello holds Illinois license 036091537.
Which hospitals is Dr. Gregory C. Castello affiliated with?
Dr. Castello practices at Northwestern Medicine Central DuPage Hospital in Winfield, Illinois. Dr. Castello is also affiliated with Edward Hospital. Dmand AI links Dr. Castello to 1 more hospital.
What medical group is Dr. Gregory C. Castello part of?
Dr. Castello is linked to Northwestern Medicine Central DuPage Hospital. Dmand AI links Dr. Castello to 1 more medical group.
Does Dr. Gregory C. Castello accept Medicare?
Yes. CMS data shows Dr. Castello billed Medicare for 34,718 services in 2024, and Dr. Castello accepts Medicare assignment.
Does Dr. Gregory C. Castello offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Castello as offering telehealth services.
What is Dr. Gregory C. Castello's MIPS score?
Dr. Castello's MIPS final score for performance year 2024 is 75 out of 100, reported individually.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Gregory C. Castello see?
CMS counts 197 Medicare patients who saw Dr. Castello in 2024, with an average age of 77.
What services does Dr. Gregory C. Castello bill to Medicare?
In 2024, Dr. Castello's most billed Medicare services were injected or infused drug (J7320), surgery: bones and joints (20610) and radiation oncology (77002).
Where did Dr. Gregory C. Castello go to medical school?
Dr. Castello graduated from Midwestern University, Chicago College of Osteopathic Med in 1993.
What drugs does Dr. Gregory C. Castello prescribe most?
In 2024 Medicare Part D data, Dr. Castello's most prescribed drugs by claims were Rosuvastatin Calcium, Losartan Potassium and Levothyroxine Sodium.
Has Dr. Gregory C. Castello received payments from drug or device companies?
CMS Open Payments shows $7,863 in general payments to Dr. Castello from 27 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Gregory C. Castello been practicing?
Dr. Castello graduated from medical school in 1993, 33 years ago.
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