Dr. Randall R. Dwenger, MD
- Part D claims, 2024
- 770
- Industry payments
- $9,155
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 187 South Canaan Road, Canaan, CT 06018
- Practice phone
- Call (860) 824-1397
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mountainside Treatment Center - Canaan
Opioid Treatment Program (Methadone Clinic) · Canaan, Connecticut
Find Dr. Dwenger's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Randall R. Dwenger is a psychiatrist in Canaan, Connecticut
Dr. Dwenger practices at Mountainside Treatment Center - Canaan in Canaan, Connecticut.
Dr. Dwenger's NPI, 1649291980, was assigned on July 22, 2006. Dr. Dwenger graduated from Indiana University School Of Medicine in 1984. Dr. Dwenger holds New York license 183297.
- NPI
- 1649291980NPI Registry (opens in a new tab)
- NPI enumeration date
- July 22, 2006
- NPI status
- Active
- Practice phone
- (860) 824-1397
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Randall R. Dwenger practices at Mountainside Treatment Center - Canaan in Canaan, Connecticut
Dr. Dwenger's primary practice is Mountainside Treatment Center - Canaan, at 187 South Canaan Road, Canaan, CT 06018. The practice phone is (860) 824-1397.
- Mountainside Treatment Center - Canaan187 South Canaan Road, Canaan, CT 06018Phone(860) 824-1397
Source: Dmand AI Affiliation Data
Dr. Randall R. Dwenger is affiliated with 1 site of care
Dr. Dwenger's primary practice is Mountainside Treatment Center - Canaan in Canaan, Connecticut. Dr. Dwenger's employer is on file too: a behavioral health center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Randall R. Dwenger's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Dwenger practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mountainside Treatment Center - Canaan | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Randall R. Dwenger is one of 828 psychiatrists in Connecticut
Psychiatry is Dr. Dwenger's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Dwenger is licensed in New York.
Specialties and state licenses
- Psychiatry, New YorkPrimary
Psychiatrists near Dr. Dwenger
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Randall R. Dwenger's patients have a median age of 34
Across all payers, Dmand AI patient panel data puts Dr. Dwenger's median patient age at 34, with 32% women.
Dr. Dwenger's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 34
Patient panel by sex, all payers
- Women32%
- Men68%
Source: Dmand AI Patient Panel Data
Dr. Randall R. Dwenger wrote 770 Medicare Part D claims in 2024
In 2024, Dr. Dwenger wrote 770 Medicare Part D claims for 61 patients. 99% of them were for generic drugs. CMS names the drug for 670 of them, across 20 drugs with 11 or more claims each, at $10,950 in total drug cost. In 2023, CMS named 647 claims across 20 drugs.
Dr. Dwenger's Part D claims by kind of drug, 2024
- Generic762 claims99%
- Brand-name and other8 claims1%
Dr. Dwenger's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Dwenger's Part D claims, 2024
- Antipsychotics, patients 65 and over5%35 of 770 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6472024: 6704%
Drugs named by CMS: 20 in 2024, 20 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Randall R. Dwenger received $9,155 in industry payments from 2017 to 2025
CMS Open Payments shows 11 general payments to Dr. Dwenger from 6 drug and device companies from 2017 to 2025. Speaker and faculty fees make up the largest share, 74% of the total. Indivior Inc. paid the most, $9,058.
General payments to Dr. Dwenger by program year, 2017 to 2025
General payments to Dr. Dwenger by kind, 2017 to 2025
- Speaker and faculty fees$6,75374%
- Consulting fees$2,17524%
- Food and beverage$2222%
- Education$60%
Companies that paid Dr. Dwenger the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Randall R. Dwenger graduated from Indiana University School Of Medicine
Dr. Dwenger graduated from Indiana University School Of Medicine in 1984.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Randall R. Dwenger's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Randall R. Dwenger
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Randall R. Dwenger's NPI number?
Dr. Randall R. Dwenger's NPI number is 1649291980. It was assigned on July 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Randall R. Dwenger?
Dr. Randall R. Dwenger is a psychiatrist in Canaan, Connecticut. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Randall R. Dwenger practice?
Dr. Dwenger practices at 187 South Canaan Road, Canaan, CT 06018. Dr. Dwenger's primary practice is Mountainside Treatment Center - Canaan in Canaan, Connecticut.
What is Dr. Randall R. Dwenger's office phone number?
The practice phone on file for Dr. Dwenger is (860) 824-1397.
What is Dr. Randall R. Dwenger's medical license number?
Dr. Dwenger holds New York license 183297.
Where did Dr. Randall R. Dwenger go to medical school?
Dr. Dwenger graduated from Indiana University School Of Medicine in 1984.
What drugs does Dr. Randall R. Dwenger prescribe most?
In 2024 Medicare Part D data, Dr. Dwenger's most prescribed drugs by claims were Escitalopram Oxalate, Lorazepam and Clonazepam.
Has Dr. Randall R. Dwenger received payments from drug or device companies?
CMS Open Payments shows $9,155 in general payments to Dr. Dwenger from 6 companies from 2017 to 2025. The largest total came from Indivior Inc.
How long has Dr. Randall R. Dwenger been practicing?
Dr. Dwenger graduated from medical school in 1984, 42 years ago.
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