Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mark K Chang, M.D.

Q: What is the NPI number for Mark Chang?

The National Provider Identifier (NPI) for Mark Chang is 1871607507, a Type 1 (individual) record in the CMS NPPES registry.

Orthopaedic Surgery Physician in Dyer, IN · enumerated 2006.

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

National Provider Identifier

1871607507

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Registry record

Entity type Individual (Type 1)

Name Mark K Chang

Credential M.D.

Sex Male

Practice address Dyer, IN, 46311

Phone (219) 836-4955

Fax (219) 865-2377

Enumeration date Aug 19, 2006

Last updated in NPPES Feb 5, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 200033540A (IN) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 036095817 (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
036095817	Medicaid	IL	-
P00419910	Other	-	RAILROAD MEDICARE
200868870A	Medicaid	IN	-

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

Where does Mark Chang practice?

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

What is the NPI number for Mark Chang?

The National Provider Identifier (NPI) for Mark Chang is 1871607507, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Douglas Hoeksema Physical Therapist · Dyer, IN NPI 1871561977 Mbwoude, Inc. Physical Therapist · Dyer, IN NPI 1497709950 Tara Pai Physical Therapist · Dyer, IN NPI 1528014859 Daniel Benjamin Physical Therapist · Dyer, IN NPI 1699715615 Sima Shah Physical Therapist · Dyer, IN NPI 1578503744 Back To Work, Inc. Physical Therapist · Dyer, IN NPI 1750319679 Sara Stafford Physical Therapist · Dyer, IN NPI 1669486833 Mark K Chang MD Orthopaedic Surgery of the Spine Physician · Dyer, IN NPI 1003022476

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-05.