Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Siddhartha Ganguly, M.D.

Hematology (Internal Medicine) Physician in Houston, TX · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1689767261

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Siddhartha Ganguly

Credential M.D.

Sex Male

Practice address 6445 Main Street, Opc Floor 24, Houston, TX, 77030

Phone (713) 441-9948

Enumeration date Oct 2, 2006

Last updated in NPPES Jul 7, 2026

Taxonomy & licenses

207RH0000X Hematology (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License S6620 (TX) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
100450610A	Medicaid	KS	-
208433904	Medicaid	MO	-
32125027	Other	MO	BCBS KC
405970	Other	KS	FIRSTGUARD

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Siddhartha Ganguly practice?

The practice location on file with NPPES is in Houston, TX. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Siddhartha Ganguly?

The National Provider Identifier (NPI) for Siddhartha Ganguly is 1689767261, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-07.