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LEONARD A. ZWELLING M.D.
NPI 1003900572
Internal Medicine - Medical Oncology in Houston, TX

Active since October 02, 2006
1515 HOLCOMBE BLVD, HOUSTON, TX 77030(713) 792-6161 Get Directions Write a Review

NPPES record last updated: December 6, 2007. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Leonard A. Zwelling M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LEONARD A. ZWELLING M.D. (NPI 1003900572) is an individual medical oncology provider in Houston, Texas, licensed in Texas (G7031) and active in the NPI registry since October 2006.

NPPES Registry Identity

NPI1003900572
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameLEONARD A. ZWELLINGCredential: M.D.
Location Address1515 HOLCOMBE BLVDHouston, TX 77030-4009
Mailing AddressPo Box 4439Houston, TX 77210-4439 · (713) 792-2991
Phone(713) 792-6161
Sole ProprietorNo
Enumeration DateOctober 2, 2006
Last NPPES UpdateDecember 6, 2007
✔ NPI 1003900572 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License✔ Licensed in TX · G7031
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
1515 HOLCOMBE BLVD, Houston, TX 77030
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Other Identifiers 2

Medicare UPINB27862
Medicare PIN800763TX

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MERRY CHEN MD
Psychiatry & Neurology (Neurology)
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161
AMEENA BAGREE MALHOTRA M.D.
Internal Medicine (Nephrology)
1515 HOLCOMBE BLVD, 77030-4009
HOUSTON, TX 77030
Harris County (713) 792-6161
SOLANGE ERLYN COX MD
Surgery
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-2360
DR. BRYAN KEITH GUILLORY M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161
JANUARY Y TSAI MD
Anesthesiology
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161
DR. SUNYOUNG LEE MD
Internal Medicine (Medical Oncology)
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161
MRS. RACHEL KRAMER FUTRELL PA-C
Physician Assistant
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161
MEGAN J TANNER NP-C
Nurse Practitioner
1515 HOLCOMBE BLVD
HOUSTON, TX 77030
Harris County (713) 792-6161

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Leonard Zwelling's NPI number?

The NPI number for Leonard Zwelling is 1003900572. It was assigned to this individual provider in the NPPES registry on October 2, 2006.

Where is Leonard Zwelling located?

Leonard Zwelling practices at 1515 Holcombe Blvd, Houston, TX 77030. The listed phone number is (713) 792-6161.

What is Leonard Zwelling's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

When was this NPI record last updated?

The NPPES record for Leonard Zwelling was last updated on December 6, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.