Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John A Spera, M.D.

Q: What is the NPI number for John Spera?

The National Provider Identifier (NPI) for John Spera is 1306831813, a Type 1 (individual) record in the CMS NPPES registry.

Radiation Oncology Physician in Danbury, CT · enumerated 2005.

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

National Provider Identifier

1306831813

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Registry record

Entity type Individual (Type 1)

Name Dr. John A Spera

Credential M.D.

Sex Male

Practice address 24 Hospital Ave, Danbury, CT, 06810

Phone (203) 797-7322

Fax (203) 743-2610

Enumeration date Sep 12, 2005

Last updated in NPPES Sep 7, 2023

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 027976 (CT) 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

Where does John Spera practice?

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

What is the NPI number for John Spera?

The National Provider Identifier (NPI) for John Spera is 1306831813, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-07.