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MR. GREGORY MACEWAN
NPI 1134378482
Counselor - Mental Health in New Haven, CT

Active since September 11, 2008PECOS EnrolledAccepts Medicare Assignment
425 GEORGE ST, NEW HAVEN, CT 06511(617) 877-7600(203) 688-3596 Get Directions Write a Review

NPPES record last updated: June 9, 2010. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Mr. Gregory Macewan NPPES

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

MR. GREGORY MACEWAN (NPI 1134378482) is an individual mental health provider in New Haven, Connecticut and active in the NPI registry since September 2008. He is enrolled in Medicare PECOS and is a graduate of Other (2011).

NPPES Registry Identity

NPI1134378482
Entity TypeIndividualMale
Primary Taxonomy101YM0800X
Provider Legal NameMR. GREGORY MACEWAN
Location Address425 GEORGE STNew Haven, CT 06511-5410
Mailing Address425 George StNew Haven, CT 06511-5410
Phone(617) 877-7600
Fax(203) 688-3596
Sole ProprietorNo
Medical School CMSOtherGraduated 2011
Enumeration DateSeptember 11, 2008
Last NPPES UpdateJune 9, 2010
✔ NPI 1134378482 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
425 GEORGE ST, New Haven, CT 06511
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care.Insurance ›

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

Mr. Gregory Macewan 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 ID5395980692
PECOS Enrollment IDI20130314000053
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 Gregory Macewan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Kerzner Associates PC
102 mi
Clinical
17 COCASSET ST
Foxboro, MA 02035
  • Reassigned Medicare billing, Massachusetts enrollment
  • 15 clinicians in this Medicare group
NPI 1003912049 (508) 543-2133

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

Other Providers at the Same Location NPPES 20

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

SEZAI USTUN AYDIN
Psychiatry & Neurology (Child & Adolescent Psychiatry)
425 GEORGE ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 688-3182
ALEC M SMIDT
Student in an Organized Health Care Education/Training Program
425 GEORGE ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (630) 346-0969
MS. HEATHER E DOUGLAS-PALUMBERI M.A.
Student in an Organized Health Care Education/Training Program
425 GEORGE ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 537-1638
MS. CAROLYN MARIE GATTI LCSW
Social Worker (Clinical)
425 GEORGE ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 688-3182
BELINDA BREEN
Psychologist
425 GEORGE ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 688-3182
NADIKA PARANAMANA MA
Student in an Organized Health Care Education/Training Program
425 GEORGE ST, DBT OUTPATIENT PROGRAM
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 688-3182
LAUREN NICOLE FORREST
Student in an Organized Health Care Education/Training Program
425 GEORGE ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 688-3596
DR. TAMI PITCHER SULLIVAN PH.D.
Psychologist
425 GEORGE ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 688-3182

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 Gregory Macewan's NPI number?

The NPI number for Gregory Macewan is 1134378482. It was assigned to this individual provider in the NPPES registry on September 11, 2008.

Where is Gregory Macewan located?

Gregory Macewan practices at 425 George St, New Haven, CT 06511. The listed phone number is (617) 877-7600.

What is Gregory Macewan's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Is Gregory Macewan enrolled in Medicare?

Yes. Gregory Macewan 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 Gregory Macewan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Macewan reassigns Medicare benefits to Kerzner Associates PC (Foxboro, MA). 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 Gregory Macewan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Macewan accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Gregory Macewan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gregory Macewan was last updated on June 9, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.