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

Mariana Chavez Mac Gregor, MD, MSC

Individual provider Internal Medicine Physician · NPI 1740408624

Mariana Chavez Mac Gregor, MD, MSC is a Medical Oncology in Houston, Texas. Qualified in 2003, 23 years ago. Practices with Physicians Referral Service, a 2,727-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Missouri and Texas.

Years since qualifying
23
Licensed in
MO, TX
In the registry since
2007
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

1515 Holcombe Blvd
Houston, TX 77030-4009
Phone: (713) 792-6161
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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 P2211 (TX)
Internal Medicine Physician Taxonomy 207R00000X · Licence 2005015456 (MO)

Record details

NPI number1740408624
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , MSC
Sole proprietorNo
NPI enumeratedApril 23, 2007
Last updated in NPPESJune 20, 2012

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Group practice Physicians Referral Service — 2727 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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