Doctor profile · Federal record

Dr. Allison Williams, PA-C

Physician Assistant · Physician Assistant · Ann Arbor, MI

  • NPI 1699402388
  • 4 yrs on file
  • Licensed in 2 states
  • Female
  • Group practice
  • No sanctions

Practice & contact

Operates at 2 locations .

NPPES Updated May 11, 2026
Primary practice
1500 E Medical Center Dr
Ann Arbor, MI 481095000
(734) 936-4000
Additional location
901 Harry S Truman Dr N
Largo, MD 207745477
(410) 868-0664
Mailing address
3621 S State St
Ann Arbor, MI 481081633

Credentials & registration

NPPES · NUCC
NPI registered
August 2022 — 4 yrs on file
Profile last updated
October 28, 2024
Specialty taxonomy
363A00000X — NUCC code
State licenses (2)
Michigan #5601012405 · Maryland #C08539

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1699402388. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
29
Distinct HCPCS
2
Medicare allowed
$4,131
HCPCS Description Services Patients Avg allowed
99285 Emergency department visit with high level of medical decision making 18 18 $162
99284 Emergency department visit with moderate level of medical decision making 11 11 $111

In context: peer comparison

Among 139 peers in this city , average services per provider: 53. This provider delivers 0.5× the peer median.

Frequently asked questions

Auto-generated from federal data
What is Dr. Allison Williams's medical specialty?
Dr. Allison Williams practices Physician Assistant in Ann Arbor, MI.
Where does Dr. Allison Williams practice?
Dr. Allison Williams practices at 1500 E Medical Center Dr, Ann Arbor, MI 481095000. Office phone: 7349364000.
What is Dr. Allison Williams's NPI?
Dr. Allison Williams's National Provider Identifier (NPI) is 1699402388, issued by NPPES.
What procedures does Dr. Allison Williams commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.