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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jennifer Ann Ackerman, D.O.

Internal Medicine Physician in Warrenton, VA · enumerated 2007 · practices at Warrenton Medical Associates,PC.

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

National Provider Identifier

1902958986

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Registry record

Entity type Individual (Type 1)
Name Dr. Jennifer Ann Ackerman
Credential D.O.
Sex Female
Practice address 555 Hospital Dr, Warrenton, VA, 20186
Phone (540) 347-5512
Fax (540) 341-4646
Enumeration date Jan 18, 2007
Last updated in NPPES Mar 18, 2014

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 0102050261 (VA) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
061010000 Other VA SOUTHERN HEALTH
50820005 Other VA CAREFIRST PROVIDER #
ANTHEM Other VA ANTHEM PROVIDER #
7567197 Other VA AETNA PROVIDER #
885925 Other VA MAMSI PROVIDER #
5849667 Medicaid VA -
112539 Other VA CIGNA PROVIDER #
275675 Other VA HEALTHKEEPERS

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 Jennifer Ackerman?
Jennifer Ackerman is registered in NPPES with the primary taxonomy of Internal Medicine 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 2014-03-18.