Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Allison Terwilliger, MD

Physical Medicine & Rehabilitation Physician in Indianapolis, IN · enumerated 2016.

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

National Provider Identifier

1003363029

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Registry record

Entity type Individual (Type 1)

Name Allison Terwilliger

Credential MD

Sex Female

Practice address 355 W 16th St Ste 4300, Indianapolis, IN, 46202

Phone (317) 503-9908

Enumeration date Sep 7, 2016

Last updated in NPPES Jun 30, 2026

Taxonomy & licenses

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License 01100672A (IN) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

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.

What specialty is Allison Terwilliger?

Allison Terwilliger is registered in NPPES with the primary taxonomy of Physical Medicine & Rehabilitation Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-30.