Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Frank Michael Castillo, MD, FAAFP

Individual provider Family Medicine Physician · NPI 1548280787

Frank Michael Castillo, MD, FAAFP is a Family Practice in Chicago, Illinois. Graduated from University of Wisconsin School of Medicine in 1988, 38 years ago. Practices with One Medical Group Inc, a 328-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Illinois.

Years since qualifying
38
Trained at
University of Wisconsin School of Medicine
Licensed in
IL
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
FAAFP — Fellow of the American Academy of Family Physicians
A family physician admitted as a fellow of the AAFP.

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Practice location Address checks out

230 W Monroe St Lbby 100
Chicago, IL 60606-4701
Phone: (888) 663-6331
Fax: (415) 252-7176
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2750 W North Ave, Chicago, IL 60647-5247 — (312) 666-3494

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 036-098759 (IL)

Record details

NPI number1548280787
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , FAAFP
Sole proprietorYes
NPI enumeratedJuly 20, 2006
Last updated in NPPESMarch 18, 2025
Certification dateMarch 18, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF WISCONSIN SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice One Medical Group Inc — 328 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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