Doctor profile · Federal record
Dr. John Dettwyler, PH.D.
Psychologist (CMS: Clinical Psychologist) · Wilmington, DE
- NPI 1982776324
- Accepts Medicare
- 39 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
5301 Limestone RD, Suite 103
Wilmington, DE 198081250
(302) 234-8982
fax (302) 234-8984
Credentials & registration
- NPI registered
- November 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1987 — 39 yrs since
- Specialty taxonomy
- 103T00000X — NUCC code
- State license (1)
- Delaware #B10000210
- Medicaid (2)
- DE #1000025979 · DE #0000621543
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1982776324. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
313
Distinct HCPCS
2
Medicare allowed
$51,228
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
90791 |
Psychiatric diagnostic evaluation | 214 | 207 | $172 | |
90837 |
Psychotherapy, 1 hour | 99 | 22 | $146 |
In context: peer comparison
Among 7 peers in this city , average services per provider: 184. This provider delivers 1.7× the peer median.Frequently asked questions
What is Dr. John Dettwyler's medical specialty?
Dr. John Dettwyler practices Psychologist in Wilmington, DE.
Where does Dr. John Dettwyler practice?
Dr. John Dettwyler practices at 5301 Limestone RD, Wilmington, DE 198081250. Office phone: 3022348982.
What is Dr. John Dettwyler's NPI?
Dr. John Dettwyler's National Provider Identifier (NPI) is 1982776324, issued by NPPES.
Does Dr. John Dettwyler accept Medicare assignment?
Yes. Dr. John Dettwyler accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Dettwyler commonly perform?
Top Medicare-reported procedures in 2023: Psychiatric diagnostic evaluation (HCPCS 90791); Psychotherapy (HCPCS 90837). Source: CMS Medicare Physician & Other Practitioners file.