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

Daniel Alexander Castellanos, MD

Individual provider Pediatric Cardiology Physician · NPI 1003298126

Daniel Alexander Castellanos, MD is a Cardiovascular Disease (Cardiology) in Boston, Massachusetts. Graduated from Florida International Univ, College of Medicine in 2013, 13 years ago. Practices with Boston Childrens Heart Foundation Inc, a 99-clinician group and accepts Medicare assignment. Licensed in Massachusetts and Texas.

Years since qualifying
13
Trained at
Florida International Univ, College of Medicine
Licensed in
MA, TX
In the registry since
2015
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

300 Longwood Ave
Boston, MA 02115-5724
Phone: (617) 355-6000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Cardiology Physician (primary) Taxonomy 2080P0202X · Licence 283956 (MA)
Pediatric Cardiology Physician Taxonomy 2080P0202X · Licence Q8849 (TX)
Pediatric Cardiology Physician Taxonomy 2080P0202X · Licence ETL5309 (MA)

Record details

NPI number1003298126
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 25, 2015
Last updated in NPPESMarch 11, 2021
Certification dateMarch 11, 2021

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesPEDIATRIC MEDICINE
Medical schoolFLORIDA INTERNATIONAL UNIV, COLLEGE OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice Boston Childrens Heart Foundation Inc — 99 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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