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CHRISTOPHER EL MOUHAYYAR
NPI 1003476227
Internal Medicine in New Haven, CT

Active since June 19, 2019PECOS EnrolledAccepts Medicare Assignment
20 YORK ST, NEW HAVEN, CT 06510(203) 688-4242 Get Directions Write a Review

NPPES record last updated: July 23, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Christopher El Mouhayyar NPPES

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

CHRISTOPHER EL MOUHAYYAR (NPI 1003476227) is an individual internal medicine provider in New Haven, Connecticut, licensed in Connecticut (1.080789) and active in the NPI registry since June 2019. He is enrolled in Medicare PECOS and is a graduate of Other (2017).

NPPES Registry Identity

NPI1003476227
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameCHRISTOPHER EL MOUHAYYAR
Location Address20 YORK STNew Haven, CT 06510-3202
Mailing Address20 York StNew Haven, CT 06510-3220
Phone(203) 688-4242
Sole ProprietorYes
Medical School CMSOtherGraduated 2017
Enumeration DateJune 19, 2019
Last NPPES UpdateJuly 23, 2025
NPPES CertifiedJuly 23, 2025
✔ NPI 1003476227 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 · 1.080789
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.
20 YORK ST, New Haven, CT 06510
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Other Identifiers 1

Other80789CT · Connecticut Department Of Public Health

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 and accepts Medicare assignment

Christopher El Mouhayyar 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 ID1052746138
PECOS Enrollment IDI20250614000087
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 Christopher El Mouhayyar reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Yale University
0.4 mi
Advanced Practice Midwife
100 CHURCH ST S STE 200, YALE SCHOOL OF NURSING
New Haven, CT 06519
  • Reassigned Medicare billing, Connecticut enrollment
  • 3,728 clinicians in this Medicare group
NPI 1124148887 (203) 737-5432

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 06510 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.

AUDREY P SENIOR APRN
Nurse Practitioner (Family)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-5860
DR. YEISID F FIGUEREDO M.D.
Pediatrics (Neonatal-Perinatal Medicine)
20 YORK ST, DEPT OF NEONATOLOGY
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-2320
YALE NEW HAVEN HOSPITAL
Durable Medical Equipment & Medical Supplies (Customized Equipment)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-2046
TAYLOR KINGSTON
Dietitian, Registered
20 YORK ST, FOOD AND NUTRITION EPB806
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-9185
DR. TRAVIS DANIEL BONTRAGER MD
Hospitalist
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-1734
TERESA JOSEPH D.O.
Internal Medicine (Nephrology)
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 737-8894
MR. BRAD ST. MARTIN MD
Obstetrics & Gynecology
20 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4242
BERNADETTE BIMONTE-HACKETT LCSW
Social Worker (Clinical)
20 YORK ST, SOCIAL WORK EP10-635
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-5161

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 Christopher El Mouhayyar's NPI number?

The NPI number for Christopher El Mouhayyar is 1003476227. It was assigned to this individual provider in the NPPES registry on June 19, 2019.

Where is Christopher El Mouhayyar located?

Christopher El Mouhayyar practices at 20 York St, New Haven, CT 06510. The listed phone number is (203) 688-4242.

What is Christopher El Mouhayyar's specialty?

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

Is Christopher El Mouhayyar enrolled in Medicare?

Yes. Christopher El Mouhayyar 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 Christopher El Mouhayyar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Christopher El Mouhayyar reassigns Medicare benefits to Yale University (New Haven, 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 Christopher El Mouhayyar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Christopher El Mouhayyar accept?

Health plans from Anthem Blue Cross and Blue Shield list Christopher El Mouhayyar 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 Christopher El Mouhayyar was last updated on July 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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.