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

Majonel Ontanillas, MD

Individual provider Internal Medicine Physician · NPI 1235105313

Majonel Ontanillas, MD practises Internal Medicine in Las Vegas, Nevada. Qualified in 1992, 34 years ago. Practices with Optum Medical Group II Rhodes P C, a 302-clinician group and accepts Medicare assignment. Licensed in Massachusetts and Nevada.

Years since qualifying
34
Licensed in
MA, NV
In the registry since
2006
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

2704 N Tenaya Way
Las Vegas, NV 89128-0424
Phone: (702) 243-8500
Fax: (702) 242-4194
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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 12413 (NV)
Internal Medicine Physician Taxonomy 207R00000X · Licence 223130 (MA)

Record details

NPI number1235105313
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 27, 2006
Last updated in NPPESNovember 18, 2024
Certification dateNovember 18, 2024

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1992 (34 years in practice)
Group practice Optum Medical Group Ii Rhodes P C — 302 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients77
Services billed 154 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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.

Colleagues at Optum Medical Group II Rhodes P C

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 302 clinicians in the practice; 12 are shown here.

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