Provider Profile
John W. Dettwyler, PhD
Unclaimed ProfileAbout Dr. Dettwyler
John W. Dettwyler, PhD is a psychologist practicing in Wilmington, DE. John trained at Temple University School of Medicine, graduating in 1987. According to Medicare claims data, John cared for 218 Medicare patients across 285 services. The services billed most often include psychiatric diagnostic evaluation and psychotherapy, 1 hour.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (302) 234-8982
- Email not available
Practice Locations
5301 LIMESTONE RD SUITE 103
Wilmington, DE 19808
Concerns and Conditions Addressed
Within Psychology (Unspecified) generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- ADHD
- Anxiety
- Depression
- Grief
- OCD
- Relationship issues
- Trauma
Abuse and relationships
- Gaslighting and manipulation
Addiction
- Alcohol use disorder
- Drug addiction
- Gambling Addiction
- Screen Addiction
- Shopping Addiction
Anxiety & Phobias
- Illness anxiety disorder
- Panic disorder
- Social anxiety disorder
- Specific phobias
Anxiety and phobias
- Agoraphobia
Behavioral & Emotional
- Anger issues
- Dissociative disorders
- Hoarding
- Self-harm
- Skin picking and hair pulling
Child & Adolescent
- Child behavioral problems
Child and teen issues
- School refusal
- Teen depression
Eating & Body Image
- Body image issues
- Eating disorders
Health Psychology
- Chronic Pain Coping
Identity and life stages
- Gender dysphoria
- Midlife Crisis
Interpersonal & Abuse
- Divorce adjustment
- Emotional abuse recovery
- Sex Problems
Life and social issues
Mindset and personality
- Perfectionism
Mood and emotions
- Overthinking and Rumination
- Seasonal affective disorder
Mood Disorders
- Bipolar disorder
- Postpartum Mood Issues
Neurodevelopmental
Personality Disorders
- Borderline personality disorder
Relationships
Self-Esteem & Identity
- Imposter syndrome
- Low self-esteem
Sleep
- Insomnia
Sleep issues
Stress & Lifestyle
- Adjustment disorder
- Burnout
- Caregiver burnout
- Chronic stress
Thought disorders
Trauma and abuse
- Chronic Illness Coping
- Religious trauma
Work and career
Procedures & services
Most searched procedures
- Cognitive behavioral therapy
- Couples counseling
- EMDR
- Family therapy
- Psychological testing
- Therapy
Addiction support
- Relapse prevention planning
Alternative formats
- Walk and Talk Therapy
Behavioral Programs
- Anger management
- Executive Function Coaching
- Group psychotherapy
- Habit reversal training
Behavioral therapies
- Behavioral activation
Brain-based therapies
- Neurofeedback
Care delivery
- Online counseling
Child & Adolescent
- Parent coaching
- Play therapy
Evaluations & Assessments
- Autism Assessment
- Bariatric Surgery Evaluation
- Cognitive and memory testing
- Emotional Support Animal Evaluation
- Spinal Cord Stimulator Psychological Clearance
Evaluations and testing
- Adoption Psychological Evaluation
- Gender-affirming surgery evaluation
- Immigration Psychological Evaluation
- Neuropsychological Testing
Expressive therapies
- Music therapy
Family and parenting
- Parent-child interaction therapy
Mind-body therapies
Relationship Counseling
- Premarital counseling
- Sex therapy
Skills training
- Coping Skills Training
- Social skills training
Specialized therapy
- Cognitive processing therapy
- Prolonged exposure therapy
- Schema Therapy
Specialized Treatments
- Biofeedback
- Crisis intervention
- Hypnotherapy
- Ketamine-assisted counseling
- Mindfulness-based stress reduction
- Sleep counseling
Talk therapies
- Gestalt therapy
- Interpersonal psychotherapy
- Narrative therapy
Therapy Modalities
- Acceptance and commitment therapy
- Art therapy
- Brainspotting
- Dialectical Behavior Therapy
- Exposure and Response Prevention
- Internal family systems
- Psychodynamic psychotherapy
- Solution-focused brief therapy
- Somatic experiencing
Procedures Most Often Billed to Medicare
285 services · 218 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Psychiatric diagnostic evaluation | Treatment | 90791 |
202 | More than most peers in Psychologist |
| Psychotherapy, 1 hour | Treatment | 90837 |
83 | Less often than most peers in Psychologist |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other psychologists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 32 related providers in 4 groups
Other psychologists in Wilmington 8
Same specialty, same city.
Trained at Temple University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1987 at Temple University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Psychiatric diagnostic evaluation 8
Providers in DE who bill this service to Medicare most often.
Common questions
What does John W. Dettwyler specialize in?
John W. Dettwyler is a psychologist in Wilmington, DE. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is John W. Dettwyler located?
John W. Dettwyler is listed at 5301 Limestone Rd Suite 103, Wilmington, DE 19808. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is John W. Dettwyler's phone number?
The number on file is (302) 234-8982. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is John W. Dettwyler's NPI number?
John W. Dettwyler's National Provider Identifier is 1982776324. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did John W. Dettwyler train?
John W. Dettwyler attended Temple University School of Medicine, graduating in 1987. This comes from the CMS National Downloadable File.
CMS public data
How long has John W. Dettwyler been practicing?
John W. Dettwyler has 39 years experience. Calculated from a graduation year of 1987, reported in the CMS National Downloadable File.
CMS public data
What does John W. Dettwyler do most often?
According to Medicare billing data, John W. Dettwyler provides treatments such as psychiatric diagnostic evaluation and psychotherapy, 1 hour. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has John W. Dettwyler confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by John W. Dettwyler. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.