Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Merrick Sanders, MD

Pulmonary Disease Physician in Chicago, IL · enumerated 2005.

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

National Provider Identifier

1164426599

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Registry record

Entity type Individual (Type 1)

Name Dr. William Merrick Sanders

Credential MD

Sex Male

Practice address 2845 N Sheridan Rd, Ste 710, Chicago, IL, 60657

Phone (773) 935-5556

Fax (773) 935-2724

Enumeration date Jun 13, 2005

Last updated in NPPES Dec 23, 2021

Taxonomy & licenses

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 36090670 (IL) Secondary

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 36090670 (IL) 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
36090670	Medicaid	IL	-

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is William Sanders?

William Sanders is registered in NPPES with the primary taxonomy of Pulmonary Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Alan Gilman Hematology & Oncology Physician · Chicago, IL NPI 1447249834 Kristin Walter Pulmonary Disease Physician · Chicago, IL NPI 1649214636 Maria Teresa Tam Obstetrics & Gynecology Physician · Chicago, IL NPI 1003843517 Chicago Orthopaedic & Sports Medicine Sc Orthopaedic Surgery Physician · Chicago, IL NPI 1356451355 Richard Zhu Surgery Physician · Chicago, IL NPI 1104093202 Noah Rosen General Practice Dentistry · Chicago, IL NPI 1861712424 Saloumeh Degood Clinical Psychologist · Chicago, IL NPI 1417252644 Blythe Dump Physical Therapist · Chicago, IL NPI 1760738470

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-23.