Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alan H Markowitz, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Cleveland, OH · enumerated 2006.

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

National Provider Identifier

1821016916

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Registry record

Entity type Individual (Type 1)

Name Alan H Markowitz

Credential MD

Sex Male

Practice address 11100 Euclid Ave, Cleveland, OH, 44106

Phone (216) 844-5770

Enumeration date Jul 17, 2006

Last updated in NPPES Dec 28, 2020

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 35-037273 (OH) 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
000000503667	Other	-	ANTHEM
741758	Other	-	BUCKEYE
000000221014	Other	-	UNISON
363806	Other	-	WELLCARE
P00209419	Other	OH	RAILROAD MEDICARE
0443747	Medicaid	OH	-
4106488	Other	-	AETNA

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.

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Frequently asked questions

How do I verify Alan Markowitz's NPI record?

Cross-check NPI 1821016916 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821016916 active?

Yes, as of the latest NPPES snapshot, NPI 1821016916 is active (record last updated 2020-12-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-28.