John William Dettwyler, PH.D.
Psychologist · Wilmington, DE
John William Dettwyler, PH.D. is a psychologist with a practice address in Wilmington, Delaware, and NPI 1982776324, issued on Nov 14, 2006. Check the license (Delaware B10000210, as entered in NPPES) with the Delaware board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John William Dettwyler
- Credential
- PH.D.
- Primary taxonomy
- Psychologist 103T00000X
- License number
- B10000210 DE
Self-reported in NPPES; status is on the state search - Practice location
- 5301 Limestone RD, Wilmington, DE 19808
- Phone
- (302) 234-8982
- Enumerated
- Nov 14, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (302) 234-8984
- Medicaid IDs
- 1000025979 DE
0000621543 DE - Medicare enrollment
- Enrolled (PECOS I20081119000670); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 1987
- Entity
- Type 1 · individual
8 nearest psychologist records → All 151 in Delaware → Look up another NPI →
Also registered at 5301 Limestone RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michele Juarez-Huffaker, PH.D.Psychologist1497761662
Verify John William Dettwyler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Delaware board licenses this profession
Search for license B10000210Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John William Dettwyler among 151 psychologist records in Delaware
John William Dettwyler, PH.D. is one of 151 psychologist records with a practice address in Delaware. 17% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 72% newer
- In a Medicare fileNo · 17% of these records are
- In the CMS Doctors and Clinicians fileYes · 30% of these records are
- Graduated1987 · median 1999 among the 46 with a school on file
- Record last updated2007 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103T00000X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
80 psychologist records list a practice address in Wilmington
They are 80 of the 6,291 NPPES records with a practice address in Wilmington, and 151 psychologist records in Delaware. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 151 in Delaware → Every provider in Wilmington → Psychologist nationwide →
The 8 psychologist records with the nearest ZIP codes
- Tara Ferriola, PSY.D.Wilmington, DE 198081659773877
- Stanley Frankel, PH.D.Wilmington, DE 198081750454559
- Marsali Hansen, PH DWilmington, DE 198081578702882
- Michele Juarez-Huffaker, PH.D.Wilmington, DE 198081497761662
- Rita KlyauzovaWilmington, DE 198081447987169
- Kevin Loomis, P.H.D.Wilmington, DE 198081144394073
- Valarie MolaisonWilmington, DE 198081093922171
- Rhonda Rolfes, PH.DWilmington, DE 198081982755369
Common questions
What is John William Dettwyler, PH.D.'s NPI number?
John William Dettwyler, PH.D.'s National Provider Identifier (NPI) is 1982776324, issued on Nov 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John William Dettwyler, PH.D. located?
The NPPES record lists a practice address at 5301 Limestone RD, Wilmington, DE, 19808. Phone: (302) 234-8982. Providers update this record themselves, so call before visiting.
How can I verify John William Dettwyler, PH.D.'s license?
NPPES lists Delaware license number B10000210, as entered by the provider. Search the Delaware board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.