Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christine Amstadt, MD

Internal Medicine Physician in Naperville, IL · enumerated 2006.

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

National Provider Identifier

1265514962

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Christine Amstadt

Credential MD

Sex Female

Practice address 636 Raymond Dr Ste 200, Naperville, IL, 60563

Phone (630) 355-5302

Fax (630) 778-6088

Enumeration date Oct 20, 2006

Last updated in NPPES Feb 19, 2018

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 036-093359 (IL) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036-093359 (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
036093359	Medicaid	IL	-
206147	Other	IL	MEDICARE PTAN (GROUP)
F400148726	Other	IL	MEDICARE PTAN (INDIVIDUAL)

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 specialty is Christine Amstadt?

Christine Amstadt is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

Browse all →

Kathleen Remlinger Dermatology Physician · Naperville, IL NPI 1083609028 Aman Dhawan Family Medicine Physician · Naperville, IL NPI 1457384109 Colleen Keegan Dermatology Physician · Naperville, IL NPI 1497937106 Jacquelyn Sink Dermatology Physician · Naperville, IL NPI 1861887960

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-02-19.