Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Alex John Messina, MD

Individual provider Internal Medicine Physician · NPI 1902867823

Dr. Alex John Messina, MD is an Internal Medicine in Santa Monica, California. Qualified in 1965, 61 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California.

Years since qualifying
61
Licensed in
CA
In the registry since
2006
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

2021 Santa Monica Blvd #101E
Santa Monica, CA 90404
Phone: (310) 453-1103
Fax: (310) 453-9633
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A23984 (CA)

Record details

NPI number1902867823
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 30, 2006
Last updated in NPPESMarch 7, 2023
Certification dateJanuary 12, 2023

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1965 (61 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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