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DR. ROBERT S MCWILLIAM MD
NPI 1619071602
Psychiatry & Neurology - Psychiatry in Woodbury, CT

Active since September 11, 2006PECOS EnrolledAccepts Medicare Assignment
4 S POMPERAUG AVE, WOODBURY, CT 06798(203) 266-0404(203) 263-0511 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Robert S Mcwilliam Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ROBERT S MCWILLIAM MD (NPI 1619071602) is an individual psychiatry provider in Woodbury, Connecticut, licensed in Connecticut (022885) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Vermont College Of Medicine (1977).

NPPES Registry Identity

NPI1619071602
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. ROBERT S MCWILLIAMCredential: MD
Location Address4 S POMPERAUG AVEWoodbury, CT 06798-3709
Mailing Address4 S Pomperaug AveWoodbury, CT 06798-3709 · (203) 266-0404 · Fax (203) 263-0511
Phone(203) 266-0404
Fax(203) 263-0511
Sole ProprietorNo
Medical School CMSUniversity Of Vermont College Of MedicineGraduated 1977
Enumeration DateSeptember 11, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1619071602 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CT · 022885
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
4 S POMPERAUG AVE, Woodbury, CT 06798
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Robert S Mcwilliam Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID42477218
PECOS Enrollment IDI20120131000819
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Robert Mcwilliam reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Robert S Mcwilliam MD LLC
0.1 mi
Psychiatry
4 S POMPERAUG AVE
Woodbury, CT 06798
  • Reassigned Medicare billing, Connecticut enrollment
NPI 1215486261 (203) 266-0404

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06798 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$183.10 typical visit price
range $60.82 – $183.10
Typical copayment $45.77 (range $15.20 – $45.77)
Most-billed visit code 99205
Established Patient
$75.55 typical visit price
range $19.76 – $149.26
Typical copayment $18.88 (range $4.94 – $37.31)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ROBERT S MCWILLIAM MD LLC
Psychiatry & Neurology (Psychiatry)
4 S POMPERAUG AVE
WOODBURY, CT 06798
Naugatuck Valley Planning Region (203) 266-0404

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Robert Mcwilliam's NPI number?

The NPI number for Robert Mcwilliam is 1619071602. It was assigned to this individual provider in the NPPES registry on September 11, 2006.

Where is Robert Mcwilliam located?

Robert Mcwilliam practices at 4 S Pomperaug Ave, Woodbury, CT 06798. The listed phone number is (203) 266-0404.

What is Robert Mcwilliam's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Robert Mcwilliam enrolled in Medicare?

Yes. Robert Mcwilliam is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Robert Mcwilliam's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Mcwilliam reassigns Medicare benefits to Robert S Mcwilliam MD LLC (Woodbury, CT). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Robert Mcwilliam's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Robert Mcwilliam was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.