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

Gregory Calderoni Ravizzini, MD

Individual provider Nuclear Medicine Physician · NPI 1649447525

Gregory Calderoni Ravizzini, MD is a Nuclear Medicine in Houston, Texas. Qualified in 1998, 28 years ago. Practices with Physicians Referral Service, a 2,727-clinician group and accepts Medicare assignment. Licensed in New York and Texas.

Years since qualifying
28
Licensed in
NY, TX
In the registry since
2008
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

Nuclear Medicine Physician (primary) Taxonomy 207U00000X · Licence P1213 (TX)
Nuclear Medicine Physician Taxonomy 207U00000X · Licence 238724 (NY)

Record details

NPI number1649447525
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 10, 2008
Last updated in NPPESFebruary 27, 2012
Mailing addressPo Box 4439, Houston, TX 77210-4439

Medicare enrollment

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

Medicare specialtyNUCLEAR MEDICINE
Also practisesDIAGNOSTIC RADIOLOGY
Medical schoolOTHER
Graduated 1998 (28 years in practice)
Group practice Physicians Referral Service — 2727 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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