Doctor profile · Federal record
Dr. Gretchen Diem, PHD
Psychologist (CMS: Clinical Psychologist) · Psychologist · Madison, WI
- NPI 1972521946
- Accepts Medicare
- 24 yrs in practice
- Licensed in 2 states
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
700 Rayovac Drive, Suite 311
Madison, WI 537112476
(608) 492-0053
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- April 8, 2021
- Year of graduation
- 2002 — 24 yrs since
- Specialty taxonomy
- 103T00000X — NUCC code
- State licenses (2)
- Wisconsin #2591-57 · California #PSY19404
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1972521946. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
128
Distinct HCPCS
1
Medicare allowed
$18,102
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
90837 |
Psychotherapy, 1 hour | 128 | 12 | $141 |
In context: peer comparison
Among 17 peers in Madison Psychologist, average services per provider: 92. This provider delivers 1.4× the peer median.Frequently asked questions
What is Dr. Gretchen Diem's medical specialty?
Dr. Gretchen Diem practices Psychologist in Madison, WI.
Where does Dr. Gretchen Diem practice?
Dr. Gretchen Diem practices at 700 Rayovac Drive, Madison, WI 537112476. Office phone: 6084920053.
What is Dr. Gretchen Diem's NPI?
Dr. Gretchen Diem's National Provider Identifier (NPI) is 1972521946, issued by NPPES.
Does Dr. Gretchen Diem accept Medicare assignment?
Yes. Dr. Gretchen Diem accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gretchen Diem commonly perform?
Top Medicare-reported procedures in 2023: Psychotherapy (HCPCS 90837). Source: CMS Medicare Physician & Other Practitioners file.