Dr. Robert S. McWilliam, MD
- Medicare services, 2023
- 60
- Part D claims, 2024
- 286
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 4 S Pomperaug Ave, Woodbury, CT 06798-3709
- Practice phone
- Call (203) 266-0404
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Robert S. McWilliam, MD
Physician office · Woodbury, Connecticut
Find Dr. McWilliam'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. Robert S. McWilliam is a psychiatrist in Woodbury, Connecticut
Dr. McWilliam practices at Robert S. McWilliam, MD in Woodbury, Connecticut.
Dr. McWilliam's NPI, 1619071602, was assigned on September 11, 2006. Dr. McWilliam graduated from University of Vermont College of Medicine in 1977. Dr. McWilliam holds Connecticut license 022885.
- NPI
- 1619071602NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042477218
- NPI enumeration date
- September 11, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 266-0404
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 75
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert S. McWilliam practices at Robert S. McWilliam, MD in Woodbury, Connecticut
Dr. McWilliam's primary practice is Robert S. McWilliam, MD, at 4 S Pomperaug Ave, Woodbury, CT 06798-3709. The practice phone is (203) 266-0404.
- Robert S. McWilliam, MD4 S Pomperaug Ave, Woodbury, CT 06798-3709Phone(203) 266-0404
Source: Dmand AI Affiliation Data
Dr. Robert S. McWilliam is affiliated with 1 site of care
Dr. McWilliam's primary practice is Robert S. McWilliam, MD in Woodbury, Connecticut.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Robert S. McWilliam's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McWilliam practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Robert S. McWilliam, MD | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert S. McWilliam is one of 828 psychiatrists in Connecticut
Psychiatry is Dr. McWilliam's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. McWilliam is licensed in Connecticut.
Specialties and state licenses
- Psychiatry, ConnecticutPrimary
Psychiatrists near Dr. McWilliam
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. Robert S. McWilliam billed Medicare for 60 services in 2023
CMS data shows 60 Medicare services from Dr. McWilliam across 2 procedure codes in 2023. Medicare paid $4,761 for them. Every service was in an office.
Dr. McWilliam's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Tests and treatments
- 2022: 402023: 3025%
- Office and hospital visits
- 2022: 402023: 3025%
Dr. McWilliam compared with the Connecticut median for psychiatrists, 2023
- Dr. McWilliam
- Connecticut median
- Medicare services
- 60vs 11146% below
- Part D claims
- 193vs 14236% above
Medians across 886 psychiatrists in Connecticut with Dmand AI profiles that report each measure.
Dr. McWilliam's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert S. McWilliam's patients have a median age of 35
Across all payers, Dmand AI patient panel data puts Dr. McWilliam's median patient age at 35, with 13% women.
Dr. McWilliam's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 35
Patient panel by sex, all payers
- Women13%
- Men75%
Source: Dmand AI Patient Panel Data
Dr. Robert S. McWilliam wrote 286 Medicare Part D claims in 2024
In 2024, Dr. McWilliam wrote 286 Medicare Part D claims for 28 patients. 97% of them were for generic drugs. CMS names the drug for 193 of them, across 8 drugs with 11 or more claims each, at $3,876 in total drug cost. In 2023, CMS named 189 claims across 8 drugs.
Dr. McWilliam's Part D claims by kind of drug, 2024
- Generic276 claims97%
- Brand-name and other10 claims3%
Dr. McWilliam'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1892024: 1932%
Drugs named by CMS: 8 in 2024, 8 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
How Dr. Robert S. McWilliam takes part in Medicare
Dr. McWilliam accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Robert S. McWilliam graduated from University of Vermont College of Medicine
Dr. McWilliam graduated from University of Vermont College of Medicine in 1977.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert S. McWilliam'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 Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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. Robert S. McWilliam
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. Robert S. McWilliam's NPI number?
Dr. Robert S. McWilliam's NPI number is 1619071602. It was assigned on September 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert S. McWilliam?
Dr. Robert S. McWilliam is a psychiatrist in Woodbury, Connecticut. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Robert S. McWilliam practice?
Dr. McWilliam practices at 4 S Pomperaug Ave, Woodbury, CT 06798-3709. Dr. McWilliam's primary practice is Robert S. McWilliam, MD in Woodbury, Connecticut.
What is Dr. Robert S. McWilliam's office phone number?
The practice phone on file for Dr. McWilliam is (203) 266-0404.
What is Dr. Robert S. McWilliam's medical license number?
Dr. McWilliam holds Connecticut license 022885.
Does Dr. Robert S. McWilliam accept Medicare?
Yes. CMS data shows Dr. McWilliam billed Medicare for 60 services in 2023, and Dr. McWilliam accepts Medicare assignment.
What services does Dr. Robert S. McWilliam bill to Medicare?
In 2023, Dr. McWilliam's most billed Medicare services were psychiatric service (90836) and office visit, established patient (99214).
Where did Dr. Robert S. McWilliam go to medical school?
Dr. McWilliam graduated from University of Vermont College of Medicine in 1977.
What drugs does Dr. Robert S. McWilliam prescribe most?
In 2024 Medicare Part D data, Dr. McWilliam's most prescribed drugs by claims were Risperidone, Escitalopram Oxalate and Lamotrigine.
How long has Dr. Robert S. McWilliam been practicing?
Dr. McWilliam graduated from medical school in 1977, 49 years ago.
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