Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Cynthia Lou Costenbader, M.D.

Pediatrics Physician in Springfield, VA · enumerated 2007 · practices at Allergy Partners, Pllc.

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

National Provider Identifier

1295948933

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Cynthia Lou Costenbader

Credential M.D.

Sex Female

Practice address 8136 Old Keene Mill Rd Ste A309, Springfield, VA, 22152

Phone (703) 569-8021

Fax (703) 569-8123

Enumeration date May 8, 2007

Last updated in NPPES May 3, 2022

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 0101036748 (VA) 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
799347100	Medicaid	MD	-
1295948933	Medicaid	DC	-
231477ZRGM	Other	DC	MEDICARE PTAN

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

Where does Cynthia Costenbader practice?

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

What is the NPI number for Cynthia Costenbader?

The National Provider Identifier (NPI) for Cynthia Costenbader is 1295948933, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Satyen Gada Allergy & Immunology Physician · Springfield, VA NPI 1780646497 Allergy Partners, Pllc Allergy & Immunology Physician · Springfield, VA NPI 1417783788

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-03.