Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Dean Opritza, M.D.

Specialist in Manchester, NH · enumerated 2005.

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

National Provider Identifier

1780669648

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Dean Opritza

Credential M.D.

Sex Male

Practice address 100 Mcgregor St, Manchester, NH, 03102

Phone (603) 663-5310

Enumeration date Dec 13, 2005

Last updated in NPPES Mar 22, 2021

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 8193 (NH) 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
80000124	Medicaid	NH	-

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 Opritza?

The National Provider Identifier (NPI) for Gregory Opritza is 1780669648, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gregory Opritza practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-22.