Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mercedes Ann T De las Alas, MD

Individual provider Internal Medicine Physician · NPI 1477587673

Mercedes Ann T De las Alas, MD is an Internal Medicine in Murrieta, California. Qualified in 1989, 37 years ago. Works from 3 locations and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
37
Licensed in
WI
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

39765 Date St Ste 102
Murrieta, CA 92563-2005
Phone: (951) 894-4665
Fax: (951) 894-5178
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 420 Dewey St, Wisconsin Rapids, WI 54494-4714 — (715) 422-7750
  • 420 Dewey St, Wisconsin Rapids, WI 54494-4714 — (715) 422-7750

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 40506 (WI)

Record details

NPI number1477587673
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 11, 2006
Last updated in NPPESMay 7, 2024
Certification dateJune 24, 2021

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1989 (37 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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