Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Edward Olenczak, MD

Pain Medicine (Anesthesiology) Physician in Hagerstown, MD · enumerated 2005.

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

National Provider Identifier

1386637858

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Registry record

Entity type Individual (Type 1)

Name John Edward Olenczak

Credential MD

Sex Male

Practice address 1120a Professional Court, Hagerstown, MD, 21740

Phone (301) 739-7900

Fax (301) 739-7112

Enumeration date Aug 30, 2005

Last updated in NPPES Jul 16, 2010

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License MD035098E (PA) Secondary

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License MD035098E (PA) Secondary

207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians · License D0063781 (MD) 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
5700680	Medicaid	MD	-

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 John Olenczak?

The National Provider Identifier (NPI) for John Olenczak is 1386637858, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Olenczak practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-16.