Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Diane L Dietzen, MD

Hospice and Palliative Medicine (Internal Medicine) Physician in Springfield, MA · enumerated 2005.

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

National Provider Identifier

1578569828

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Registry record

Entity type Individual (Type 1)

Name Diane L Dietzen

Credential MD

Sex Female

Practice address 759 Chestnut St, Springfield, MA, 01199

Phone (413) 794-8121

Fax (413) 794-4054

Enumeration date Jun 22, 2005

Last updated in NPPES Jul 16, 2013

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD044558E (PA) Secondary

207RH0002X Hospice and Palliative Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 249857 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

What is the NPI number for Diane Dietzen?

The National Provider Identifier (NPI) for Diane Dietzen is 1578569828, a Type 1 (individual) record in the CMS NPPES registry.

Where does Diane Dietzen practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-07-16.