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DR. STEPHEN A. ATLAS MD
NPI 1871527333
Internal Medicine in New Haven, CT

Active since July 10, 2006PECOS Enrolled
1450 CHAPEL STREET, NEW HAVEN, CT 06511(203) 789-4044(203) 867-5534 Get Directions Write a Review

NPPES record last updated: September 13, 2013. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Stephen A. Atlas Md NPPES

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

DR. STEPHEN A. ATLAS MD (NPI 1871527333) is an individual internal medicine provider in New Haven, Connecticut, licensed in Connecticut (021472) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1871527333
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. STEPHEN A. ATLASCredential: MD
Location Address1450 CHAPEL STREETNew Haven, CT 06511
Mailing Address1450 Chapel StreetNew Haven, CT 06511 · (203) 789-3103 · Fax (203) 789-3222
Phone(203) 789-4044
Fax(203) 867-5534
Sole ProprietorNo
Enumeration DateJuly 10, 2006
Last NPPES UpdateSeptember 13, 2013
✔ NPI 1871527333 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CT · 021472
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1450 CHAPEL STREET, New Haven, CT 06511
Open in Google Maps ↗

Other Identifiers 5

Medicaid001214725CT
Medicare PIN110009954CT
Medicare ID-Type Unspecified110000953CT
Medicare UPINB38408
Medicaid1871527333CT

Accepted Insurance

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Stephen A. Atlas Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignments

2

Medicare enrollment records show Stephen Atlas reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mill Hill Medical Consultants Inc
0.5 mi
Geriatric Medicine
874 HOWARD AVE
New Haven, CT 06519
  • Reassigned Medicare billing, Connecticut enrollment
  • Medicare enrollment name: Northeast Medical Group Inc
  • 1,824 clinicians in this Medicare group
NPI 1891019675 (203) 688-8200
Cornell Scott Hill Health Corporation
0.9 mi
Federally Qualified Health Center (FQHC)
400-428 COLUMBUS AVENUE
New Haven, CT 06519
  • Reassigned Medicare billing, Connecticut enrollment
  • 468 clinicians in this Medicare group
NPI 1902921380 (203) 503-3000

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 06511 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
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
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 20

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

DR. RICHARD J. BARSE MD
Internal Medicine
1450 CHAPEL STREET
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-4044
DR. STEVEN J. ANGELO MD
Internal Medicine
1450 CHAPEL STREET, SAINT RAPHAEL FACULTY PHYSICIANS
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-5946
MS. DEBORAH ROSE COOKE PA-C
Physician Assistant (Surgical)
1450 CHAPEL STREET
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 415-6807
YUNG AH LEE M.D.
Internal Medicine (Geriatric Medicine)
1450 CHAPEL STREET, GERIATRIC SERVICES
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 688-8200
DR. RAVI KAZA MD
Obstetrics & Gynecology
1450 CHAPEL STREET, SAINT RAPHAEL FACULTY PHYSICIANS
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-4074
DR. GRAHAM MARK GRABOWSKI DMD
Student in an Organized Health Care Education/Training Program
1450 CHAPEL STREET, HOSPITAL OF SAINT RAPHAEL
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-3156
MR. SHANNON B KNAGGS APRN
Pediatrics
1450 CHAPEL STREET
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-4074
LYDIA SEGUI PA-C
Physician Assistant
1450 CHAPEL STREET
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-3000

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 Stephen Atlas's NPI number?

The NPI number for Stephen Atlas is 1871527333. It was assigned to this individual provider in the NPPES registry on July 10, 2006.

Where is Stephen Atlas located?

Stephen Atlas practices at 1450 Chapel Street, New Haven, CT 06511. The listed phone number is (203) 789-4044.

What is Stephen Atlas's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Stephen Atlas enrolled in Medicare?

Yes. Stephen Atlas is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Stephen Atlas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Atlas reassigns Medicare benefits to 2 organizations: Mill Hill Medical Consultants Inc (New Haven, CT) and Cornell Scott Hill Health Corporation (New Haven, CT). Each 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 Stephen Atlas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Stephen Atlas accept?

Health plans from Anthem Blue Cross and Blue Shield list Stephen Atlas 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 Stephen Atlas was last updated on September 13, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.