Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Costas L. Constantinou, M.D., P.C

Hematology & Oncology Physician in Davenport, IA · enumerated 2007 · authorized official Costas Constantinou, President.

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

National Provider Identifier

1306027164

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Registry record

Entity type Organization (Type 2)

Legal business name Costas L. Constantinou, M.D., P.C

Practice address 1409 E Kimberly Rd, Davenport, IA, 52807

Phone (563) 359-9876

Fax (563) 359-0608

Enumeration date Nov 21, 2007

Last updated in NPPES Jun 11, 2008

Taxonomy & classification

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Costas Constantinou

Title President

Phone (563) 359-9876

Other identifiers

Identifier	Type	State	Issuer
3217588	Medicaid	IA	-

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 is Costas L. Constantinou, M.D., P.C located?

The practice location on file with NPPES is in Davenport, IA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-06-11. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-11.