Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Lewis Li-Yen Hsu, M.D., PH.D.

Pediatric Hematology & Oncology Physician in Chicago, IL · enumerated 2006.

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

National Provider Identifier

1851357388

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Registry record

Entity type Individual (Type 1)

Name Dr. Lewis Li-Yen Hsu

Credential M.D., PH.D.

Sex Male

Practice address 1801 W Taylor St, Suite 2e, Chicago, IL, 60612

Phone (312) 996-6143

Fax (312) 413-9484

Enumeration date Apr 24, 2006

Last updated in NPPES Jan 5, 2022

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 036128130 (IL) Secondary

2080P0207X Pediatric Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD044248L (PA) Secondary

2080P0207X Pediatric Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 036128130 (IL) Primary

2080P0207X Pediatric Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD037835 (DC) Secondary

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
00617746	Medicaid	GA	-
0019667210001	Medicaid	PA	-
617746B	Medicaid	GA	-

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.

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Frequently asked questions

How do I verify Lewis Hsu's NPI record?

Cross-check NPI 1851357388 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1851357388 active?

Yes, as of the latest NPPES snapshot, NPI 1851357388 is active (record last updated 2022-01-05).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-05.