Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joan Minette Mack, M.D.

General Practice Physician in Darby, PA · enumerated 2006.

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

National Provider Identifier

1558309872

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Registry record

Entity type Individual (Type 1)

Name Joan Minette Mack

Credential M.D.

Sex Female

Practice address 1500 Lansdowne Ave, Darby, PA, 19023

Phone (610) 237-4814

Enumeration date Jun 2, 2006

Last updated in NPPES Aug 28, 2015

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD030223E (PA) Secondary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License MD 030223-E (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
0012594240014	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

What specialty is Joan Mack?

Joan Mack is registered in NPPES with the primary taxonomy of General Practice Physician. 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.

Other providers at this practice address

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William Weir Certified Registered Nurse Anesthetist · Darby, PA NPI 1780682427 Darby Anesthesia Associates Inc Anesthesiology Physician · Darby, PA NPI 1396746392 Michael Brooks Diagnostic Radiology Physician · Darby, PA NPI 1477547305 Mercy Catholic Medical Center of Southeastern PA General Acute Care Hospital · Darby, PA NPI 1730173550 Domingo Java Anatomic Pathology Physician · Darby, PA NPI 1326038068 Lorenzo Galindo Anatomic Pathology & Clinical Pathology Physician · Darby, PA NPI 1568443372 Sandra Eglick Harkavy Cytopathology Physician · Darby, PA NPI 1316928120 Richard Kanoff Neurological Surgery Physician · Darby, PA NPI 1336120922

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-08-28.