Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Wayne Knestrick, MD

Hematology & Oncology Physician in Washington, PA · enumerated 2010.

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

National Provider Identifier

1447576673

Verified

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Registry record

Entity type Individual (Type 1)

Name Mark Wayne Knestrick

Credential MD

Sex Male

Practice address 470 Johnson Rd Ste 10, Washington, PA, 15301

Phone (724) 223-3816

Fax (724) 223-4079

Enumeration date Apr 13, 2010

Last updated in NPPES Sep 7, 2023

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 0101260907 (VA) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD474898 (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
1447576673	Medicaid	VA	-

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 1447576673 active?

Yes, as of the latest NPPES snapshot, NPI 1447576673 is active (record last updated 2023-09-07).

How do I verify Mark Knestrick's NPI record?

Cross-check NPI 1447576673 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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