Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Ana Maria Castaneda Guarderas, MD

Individual provider Emergency Medicine Physician · NPI 1194174318

Ana Maria Castaneda Guarderas, MD practises Emergency Medicine in Memphis, Tennessee. Qualified in 2010, 16 years ago. Practices with UT Regional One Physicians Inc, a 327-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Florida and Tennessee.

Years since qualifying
16
Licensed in
FL, TN
In the registry since
2016
Specialties on file
2
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

877 Jefferson Ave
Memphis, TN 38103
Phone: (901) 545-7100
Fax: (901) 545-8996
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 20900 Biscayne Blvd, Aventura, FL 33180-1407 — (305) 692-3392

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 59139 (TN)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 23751 (FL)

Record details

NPI number1194174318
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 8, 2016
Last updated in NPPESJanuary 15, 2020
Certification dateJanuary 15, 2020

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2010 (16 years in practice)
Group practice Ut Regional One Physicians Inc — 327 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients179
Services billed 203 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Methodist Hospitals Of Memphis Hospital · Memphis, TN · listed as Methodist Healthcare - Memphis Hospitals
  • Regional One Health Hospital · Memphis, TN

Colleagues at UT Regional One Physicians Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 327 clinicians in the practice; 12 are shown here.

Other providers in Memphis