Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen Brett Flack, M. D.

Hospitalist Physician in Chambersburg, PA · enumerated 2005 · practices at Wellspan Medical Group.

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

National Provider Identifier

1396742631

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Registry record

Entity type Individual (Type 1)

Name Stephen Brett Flack

Credential M. D.

Sex Male

Practice address 3106 Philadelphia Ave, Chambersburg, PA, 17201

Phone (717) 264-3644

Fax (717) 264-9077

Enumeration date Jul 1, 2005

Last updated in NPPES Aug 27, 2025

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD069240L (PA) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License MD069240L (PA) 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
867633	Other	PA	MEDICARE GROUP #
001789369	Medicaid	PA	-

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

Is NPI 1396742631 active?

Yes, as of the latest NPPES snapshot, NPI 1396742631 is active (record last updated 2025-08-27).

How do I verify Stephen Flack's NPI record?

Cross-check NPI 1396742631 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-27.