Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Darryl Spencer Slack, PA-C

Medical Physician Assistant in Hagerstown, MD · enumerated 2006.

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

National Provider Identifier

1801909650

Verified

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Registry record

Entity type Individual (Type 1)

Name Mr. Darryl Spencer Slack

Credential PA-C

Sex Male

Practice address 11110 Medical Campus Road, Suite 147, Meritus Health System, Hagerstown, MD, 21742

Phone (240) 313-9600

Fax (240) 313-9601

Enumeration date Aug 16, 2006

Last updated in NPPES Sep 18, 2013

Taxonomy & licenses

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License C0000715 (MD) Primary

Other identifiers

Identifier	Type	State	Issuer
C0000715	Other	MD	STATE LICENSE #

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 specialty is Darryl Slack?

Darryl Slack is registered in NPPES with the primary taxonomy of Medical Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-09-18.