Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cheryl A Opalack, DO

Occupational Medicine Physician in Kennett Square, PA · enumerated 2006.

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

National Provider Identifier

1598773442

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Registry record

Entity type Individual (Type 1)

Name Cheryl A Opalack

Credential DO

Sex Female

Practice address 32 Sapling Drive, Kennett Square, PA, 19348

Phone (610) 388-3190

Fax (610) 388-3191

Enumeration date Aug 4, 2006

Last updated in NPPES Dec 6, 2016

Taxonomy & licenses

2083X0100X Occupational Medicine Physician Allopathic & Osteopathic Physicians · License OS003388L (PA) Primary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License OS003388L (PA) Secondary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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 Cheryl Opalack's NPI record?

Cross-check NPI 1598773442 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1598773442 active?

Yes, as of the latest NPPES snapshot, NPI 1598773442 is active (record last updated 2016-12-06).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-12-06.