Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Isaacson, PA-C

Physician Assistant in Carlisle, IA · enumerated 2018 · practices at Mercy Clinics, Inc.

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

National Provider Identifier

1992283600

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Registry record

Entity type Individual (Type 1)

Name Gregory Isaacson

Credential PA-C

Sex Male

Practice address 2755 Gateway Dr, Carlisle, IA, 50047

Phone (515) 358-7300

Fax (515) 358-7341

Enumeration date Aug 3, 2018

Last updated in NPPES May 10, 2021

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 092988 (IA) Primary

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

What is the NPI number for Gregory Isaacson?

The National Provider Identifier (NPI) for Gregory Isaacson is 1992283600, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Isaacson practice?

The practice location on file with NPPES is in Carlisle, IA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Mercy Clinics, Inc Family Medicine Physician · Carlisle, IA NPI 1295070118 Marissa Pyle Family Medicine Physician · Carlisle, IA NPI 1770935322 Catherine Del Rosario Family Medicine Physician · Carlisle, IA NPI 1538681309

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-10.