Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Brendan Curran Stack Jr., MD

Plastic Surgery within the Head & Neck (Otolaryngology) Physician in Springfield, IL · enumerated 2006.

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

National Provider Identifier

1437165164

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Registry record

Entity type Individual (Type 1)

Name Brendan Curran Stack Jr.

Credential MD

Sex Male

Practice address 720 N Bond St, Springfield, IL, 62702

Phone (217) 545-8000

Enumeration date Aug 1, 2006

Last updated in NPPES Feb 19, 2020

Taxonomy & licenses

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License E4564 (AR) Secondary

207YS0123X Facial Plastic Surgery Physician Allopathic & Osteopathic Physicians · License E4564 (AR) Secondary

207YX0007X Plastic Surgery within the Head & Neck (Otolaryngology) Physician Allopathic & Osteopathic Physicians · License E-4564 (AR) Secondary

207YX0007X Plastic Surgery within the Head & Neck (Otolaryngology) Physician Allopathic & Osteopathic Physicians · License 036-151806 (IL) 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
T2005-275	Other	AR	TRICARE
0507002300	Other	AR	QUALCHOICE
5N281	Other	AR	BCBS
5N2817666	Other	—	ADDITIONAL MEDICARE
E4564	Other	AR	MEDICAL LICENSE
158045001	Medicaid	AR	—

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.

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Frequently asked questions

What specialty is Brendan Stack?

Brendan Stack is registered in NPPES with the primary taxonomy of Plastic Surgery within the Head & Neck (Otolaryngology) 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-19.