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

Maria Mercedes Mithlo, MD

Individual provider Internal Medicine Physician · NPI 1356436851

Maria Mercedes Mithlo, MD is an Internal Medicine in Elgin, Oklahoma. Qualified in 1983, 43 years ago. Practices with Duncan Regional Hospital, Inc, a 67-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
43
Licensed in
OK
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

8148 State Highway 17
Elgin, OK 73538-9010
Phone: (580) 454-2273
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 21319 (OK)

Record details

NPI number1356436851
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 3, 2006
Last updated in NPPESMarch 17, 2023
Certification dateMarch 17, 2023

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1983 (43 years in practice)
Group practice Duncan Regional Hospital, Inc — 67 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare