Dr. Frank Michael Castillo, MD
- Medicare patients, 2024
- 13
- Part D claims, 2024
- 106
- Affiliated sites
- 3
- Medical groups
- 3
- State license
- 1
- Practice address
- 181 W Madison St, Chicago, IL 60602
- Practice phone
- Call (312) 219-2230
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
One Medical Group
Chicago, Illinois
Find Dr. Castillo'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. Frank Michael Castillo is a family medicine physician in Chicago, Illinois
Dr. Castillo practices at One Medical Group in Chicago, Illinois.
Dr. Castillo's NPI, 1548280787, was assigned on July 20, 2006. Dr. Castillo graduated from University of Wisconsin School of Medicine in 1988. Dr. Castillo holds Illinois license 036-098759.
- NPI
- 1548280787NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3173706645
- NPI enumeration date
- July 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (312) 219-2230
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Frank Michael Castillo practices at One Medical Group in Chicago, Illinois
Dr. Castillo's primary practice is One Medical Group, at 181 W Madison St, Chicago, IL 60602 in Cook County. The practice phone is (312) 219-2230.
- One Medical Group181 W Madison St, Chicago, IL 60602 · Cook CountyPhone(312) 219-2230
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Frank Michael Castillo is affiliated with 4 sites of care and 3 medical groups
Dr. Castillo's primary practice is One Medical Group in Chicago, Illinois. The medical group on file is One Medical. Dmand AI also links Dr. Castillo to 2 more group practices and clinics, 2 medical groups and 1 community health center, 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. Frank Michael Castillo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Castillo practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| One Medical Group | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Frank Michael Castillo is one of 5,105 family medicine physicians in Illinois
Family medicine is Dr. Castillo's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Castillo is licensed in Illinois.
Specialties and state licenses
- Family medicine, IllinoisPrimary
Family medicine physicians near Dr. Castillo
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. Frank Michael Castillo treated 13 Medicare patients in 2024, average age 71
CMS counts 13 Medicare patients who saw Dr. Castillo in 2024. Their average risk score is 0.55, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Castillo's median patient age at 39, with 27% women.
Dr. Castillo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 39
Patient panel by sex, all payers
- Women27%
- Men71%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Frank Michael Castillo wrote 106 Medicare Part D claims in 2024
In 2024, Dr. Castillo wrote 106 Medicare Part D claims for 16 patients. 81% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $8,782 in total drug cost. In 2022, CMS named 11 claims across 1 drug.
Dr. Castillo's Part D claims by kind of drug, 2024
- Generic86 claims81%
- Brand-name20 claims19%
Dr. Castillo'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.
Part D claims for drugs CMS names, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 112024: 1427%
Drugs named by CMS: 1 in 2024, 1 in 2022.
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. Frank Michael Castillo takes part in Medicare
Dr. Castillo 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. Frank Michael Castillo graduated from University of Wisconsin School of Medicine
Dr. Castillo graduated from University of Wisconsin School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Frank Michael Castillo'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 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) |
| 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. Frank Michael Castillo
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. Frank Michael Castillo's NPI number?
Dr. Frank Michael Castillo's NPI number is 1548280787. It was assigned on July 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Frank Michael Castillo?
Dr. Frank Michael Castillo is a family medicine physician in Chicago, Illinois. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Frank Michael Castillo practice?
Dr. Castillo practices at 181 W Madison St, Chicago, IL 60602. Dr. Castillo's primary practice is One Medical Group in Chicago, Illinois. Dmand AI also links Dr. Castillo to 2 group practices and clinics, 2 medical groups and 1 community health center.
What is Dr. Frank Michael Castillo's office phone number?
The practice phone on file for Dr. Castillo is (312) 219-2230.
What is Dr. Frank Michael Castillo's medical license number?
Dr. Castillo holds Illinois license 036-098759.
What medical group is Dr. Frank Michael Castillo part of?
Dr. Castillo is linked to One Medical. Dmand AI links Dr. Castillo to 2 more medical groups.
Does Dr. Frank Michael Castillo accept Medicare?
Yes. CMS lists Dr. Castillo as accepting Medicare assignment.
How many Medicare patients does Dr. Frank Michael Castillo see?
CMS counts 13 Medicare patients who saw Dr. Castillo in 2024, with an average age of 71.
Where did Dr. Frank Michael Castillo go to medical school?
Dr. Castillo graduated from University of Wisconsin School of Medicine in 1988.
What drugs does Dr. Frank Michael Castillo prescribe most?
In 2024 Medicare Part D data, Dr. Castillo's most prescribed drugs by claims were Jardiance.
How long has Dr. Frank Michael Castillo been practicing?
Dr. Castillo graduated from medical school in 1988, 38 years ago.
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