Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Kumar Nathan, M.D.

Q: What is the NPI number for Kumar Nathan?

The National Provider Identifier (NPI) for Kumar Nathan is 1245251834, a Type 1 (individual) record in the CMS NPPES registry.

Hospitalist Physician in Huntley, IL · enumerated 2006 · practices at Questcare Obstetrics of Illinois, LLC.

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

National Provider Identifier

1245251834

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Registry record

Entity type Individual (Type 1)

Name Kumar Nathan

Credential M.D.

Sex Male

Practice address 10400 Haligus Rd, Huntley, IL, 60142

Phone (815) 759-4520

Fax (815) 338-6297

Enumeration date Jul 21, 2006

Last updated in NPPES Oct 19, 2018

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036109506 (IL) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 036109506 (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
036109506	Medicaid	IL	-
036109506	Other	IL	STATE LICENSE

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 Kumar Nathan?

The National Provider Identifier (NPI) for Kumar Nathan is 1245251834, a Type 1 (individual) record in the CMS NPPES registry.

Where does Kumar Nathan practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-10-19.