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NPISignal

Individual Healthcare Provider

Craig Andrew Williamson, MD

NPI Record: ActivePsychiatry & Neurology — Neurocritical Care
NPI1114240173
Ann Arbor, Michigan

Provider's NPPES record last updated: March 17, 2026

Overview

Entity Type
Individual Healthcare Provider
NPI
1114240173
Primary Specialty
Psychiatry & Neurology — Neurocritical Care
Practice Location
Ann Arbor, Michigan
Sole Proprietor
No

Federal Screening

NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.

List of Excluded Individuals/Entities (LEIE)

HHS Office of Inspector General

No potential match identified

No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.

Source data
September 10, 2026
Records indexed
84,001
Screened
Sep 17, 2026, 11:01 PM UTC

This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.

SAM.gov Exclusions

U.S. General Services Administration

Not checked

SAM.gov Exclusions was not checked.

SAM.gov screening is not configured on this deployment. No SAM check has been performed.

Screened
Not checked

This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.

This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.

Run a name-based screening

Searches OIG LEIE and SAM.gov by name and reviews every potential match.

Specialties & Taxonomies

  • Psychiatry & Neurology

    Neurocritical Care

    Allopathic & Osteopathic Physicians

    Primary

    The medical subspecialty of Neurocritical Care is devoted to the comprehensive, multisystem care of the critically-ill neurological patient. Like other intensivists, the neurointensivist generally assumes the primary role for coordinating the care of his or her patients in the ICU, both the neurological and medical management of the patient. They may also provide consultative services for these patients as requested within the health system.

    Taxonomy code 2084A2900X
  • Neurological Surgery

    Allopathic & Osteopathic Physicians

    A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.

    Taxonomy code 207T00000X
  • Student in an Organized Health Care Education/Training Program

    Student, Health Care

    An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.

    Taxonomy code 390200000X
  • Psychiatry & Neurology

    Neurology

    Allopathic & Osteopathic Physicians

    A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.

    Taxonomy code 2084N0400X

Provider-Reported License Information

Psychiatry & Neurology (Michigan)
4301102200
Neurological Surgery (Michigan)
4301102200
Psychiatry & Neurology (Michigan)
4301102200
License numbers are reported by the provider to NPPES and are not independently verified by NPISignal against any state licensing board. Confirm current license status directly with the issuing state board.

Practice Locations

Practice Location

1500 E Medical Center Dr

Ann Arbor, Michigan 48109-5000

Phone: (734) 936-5000

Record Information

Enumeration Date
March 4, 2010
Provider's NPPES Record Last Updated
March 17, 2026
Certification Date
March 17, 2026
NPISignal NPPES Dataset
August 2026

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