NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Hisham Greiss, MD, PHD

Medical Technologist in Downers Grove, IL · enumerated 2012 · practices at Alpha Fertility Inc..

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

National Provider Identifier

1437413978

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Hisham Greiss
Credential MD, PHD
Sex Male
Practice address 8635 Lemont Rd, Downers Grove, IL, 60516
Phone (630) 427-0300
Fax (630) 427-0302
Enumeration date Jun 29, 2012
Last updated in NPPES Jun 29, 2012

Taxonomy & licenses

174400000X Specialist Other Service Providers · License DI41357 (FL) Secondary
246QM0706X Medical Technologist Technologists, Technicians & Other Technical Service Providers · License DI41357 (FL) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

What is the NPI number for Hisham Greiss?
The National Provider Identifier (NPI) for Hisham Greiss is 1437413978, a Type 1 (individual) record in the CMS NPPES registry.
Where does Hisham Greiss practice?
The practice location on file with NPPES is in Downers Grove, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-06-29.