Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael Mak IV, M.D.

Q: What is the NPI number for Michael Mak?

The National Provider Identifier (NPI) for Michael Mak is 1811085129, a Type 1 (individual) record in the CMS NPPES registry.

Hematology & Oncology Physician in Columbus, IN · enumerated 2006.

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

National Provider Identifier

1811085129

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Mak IV

Credential M.D.

Sex Male

Practice address 2400 17th St, Columbus, IN, 47201

Phone (812) 378-2980

Fax (812) 378-2982

Enumeration date Oct 11, 2006

Last updated in NPPES Oct 6, 2010

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 01068313A (IN) Primary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 211790 (NY) 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
05679M	Other	NY	MEDICARE (NY)
200991920	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 Michael Mak practice?

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

What is the NPI number for Michael Mak?

The National Provider Identifier (NPI) for Michael Mak is 1811085129, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-10-06.