Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Constance S Gerassimakis, MD

General Practice Physician in Middletown, DE · enumerated 2006.

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

National Provider Identifier

1588696058

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Registry record

Entity type Individual (Type 1)

Name Constance S Gerassimakis

Credential MD

Sex Female

Practice address 119 Cassina Dr, Middletown, DE, 19709

Phone (302) 378-6017

Enumeration date Jul 7, 2006

Last updated in NPPES May 13, 2021

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 35-067475 (OH) Secondary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License D0065586 (MD) Secondary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 35.067475 (OH) Secondary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License C1-0003051 (DE) 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
300120838	Other	OH	RRMC
0264422	Medicaid	OH	—
CC3678	Other	OH	RRMC

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

How do I verify Constance Gerassimakis's NPI record?

Cross-check NPI 1588696058 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1588696058 active?

Yes — as of the latest NPPES snapshot, NPI 1588696058 is active (record last updated 2021-05-13).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-13.