Doctor profile · Federal record
Dr. William Drier, PH.D.; LISW
Social Worker (CMS: Clinical Social Worker) · Social Worker · Waterloo, IA
- NPI 1023400223
- Accepts Medicare
- 42 yrs in practice
- Licensed in 2 states
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
3356 Kimball Ave
Waterloo, IA 507025700
(319) 214-2159 - Mailing address
-
1900 Westchester RD Apt H
Waterloo, IA 507014500
Credentials & registration
- NPI registered
- February 2015 — 11 yrs on file
- Profile last updated
- November 1, 2017
- Year of graduation
- 1984 — 42 yrs since
- Specialty taxonomy
- 104100000X — NUCC code
- State licenses (2)
- Iowa #077437 · Illinois #150.015.162
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1023400223. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
399
Distinct HCPCS
1
Medicare allowed
$42,046
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
90837 |
Psychotherapy, 1 hour | 399 | 14 | $105 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 399. This provider delivers 1.0× the peer median.Frequently asked questions
What is Dr. William Drier's medical specialty?
Dr. William Drier practices Social Worker in Waterloo, IA.
Where does Dr. William Drier practice?
Dr. William Drier practices at 3356 Kimball Ave, Waterloo, IA 507025700. Office phone: 3192142159.
What is Dr. William Drier's NPI?
Dr. William Drier's National Provider Identifier (NPI) is 1023400223, issued by NPPES.
Does Dr. William Drier accept Medicare assignment?
Yes. Dr. William Drier accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Drier commonly perform?
Top Medicare-reported procedures in 2023: Psychotherapy (HCPCS 90837). Source: CMS Medicare Physician & Other Practitioners file.