Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Santosh N Krishnan, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Milwaukee, WI · enumerated 2006.

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

National Provider Identifier

1629020391

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Registry record

Entity type Individual (Type 1)

Name Santosh N Krishnan

Credential MD

Sex Male

Practice address 2801 W Kinnickinnic River Pkwy, #525, Milwaukee, WI, 53215

Phone (414) 649-3920

Enumeration date May 17, 2006

Last updated in NPPES Oct 31, 2011

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 47167 (WI) 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
34563600	Medicaid	WI	-
P00323107	Other	-	RR MEDICARE

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

Is NPI 1629020391 active?

Yes, as of the latest NPPES snapshot, NPI 1629020391 is active (record last updated 2011-10-31).

How do I verify Santosh Krishnan's NPI record?

Cross-check NPI 1629020391 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-31.