1. Home
  2. Directory
  3. Connecticut
  4. New Haven
  5. Internal Medicine
  6. NPI Profile

DR. COSTIN NICOLAE IONESCU M.D. PH.D
NPI 1063513703
Internal Medicine - Cardiovascular Disease in New Haven, CT

Active since September 26, 2006PECOS EnrolledAccepts Medicare Assignment
93.27/100
CMS Quality Rating
1450 CHAPEL ST, PVT 202, NEW HAVEN, CT 06511(203) 789-6045(203) 789-6046 Get Directions Write a Review

NPPES record last updated: November 25, 2013. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Costin Nicolae Ionescu M.d. Ph.d NPPES

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

DR. COSTIN NICOLAE IONESCU M.D. PH.D (NPI 1063513703) is an individual cardiovascular disease provider in New Haven, Connecticut, licensed in Connecticut (044250) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1999).

NPPES Registry Identity

NPI1063513703
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameDR. COSTIN NICOLAE IONESCUCredential: M.D. PH.D
Location Address1450 CHAPEL ST, PVT 202New Haven, CT 06511-4405
Mailing Address1450 Chapel St, Pvt 202New Haven, CT 06511-4405 · (203) 789-6045 · Fax (203) 789-6046
Phone(203) 789-6045
Fax(203) 789-6046
Sole ProprietorNo
Medical School CMSOtherGraduated 1999
Enumeration DateSeptember 26, 2006
Last NPPES UpdateNovember 25, 2013
✔ NPI 1063513703 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in CT · 044250
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Also ListedInternal MedicineTaxonomy 207R00000X · License 044250 (CT)
Also ListedInternal Medicine · Interventional CardiologyTaxonomy 207RI0011X · License 044250 (CT)
1450 CHAPEL ST, New Haven, CT 06511
Open in Google Maps ↗

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

Dr. Costin Nicolae Ionescu M.d. Ph.d 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 ID2365449956
PECOS Enrollment IDI20061024000195
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 Costin Ionescu 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 and Rhode Island enrollments
  • Medicare enrollment name: Northeast Medical Group Inc
  • Also billed through NPI 1043278351 (Rhode Island)
  • 1,824 clinicians in this Medicare group
NPI 1891019675 (203) 688-8200
Yale University
1.0 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.

Areas of Expertise CMS Part B claims 11

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
885 services651 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
183 services181 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
147 services96 patients
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152
This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.
67 services65 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
62 services57 patients
Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist 93458
This procedure involves placing a tube into your left lower heart chamber and coronary artery. It helps doctors diagnose heart conditions by allowing them to view these areas in detail. A radiologist will review the images to ensure accurate diagnosis.
45 services45 patients

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
$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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

93.27/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality81.72
Promoting Interoperability78.03
Improvement Activities40

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.

ARTHUR H KNOWLTON MD
Radiology (Therapeutic Radiology)
1450 CHAPEL ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-3131
CAROLA MARTE MD
Internal Medicine
1450 CHAPEL ST, HAELEN CENTER
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-4135
CHARLES WILLIAM JONES JR. PHARMD, BCPS
Pharmacist (Pharmacotherapy)
1450 CHAPEL ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-6267
ANDREA LOWE PAC
Physician Assistant
1450 CHAPEL ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-3464
KATHERINE ADAMS
Speech-Language Pathologist
1450 CHAPEL ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (475) 246-6982
J E FREDRIK ZETTERBERG MD
Radiology (Diagnostic Radiology)
1450 CHAPEL ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-3124
SARAH ROSE ROCKS PA
Physician Assistant (Medical)
1450 CHAPEL ST
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 680-6185
DR. JULIE ROTHSTEIN ROSENBAUM MD
Internal Medicine
1450 CHAPEL ST, ADULT PRIMARY CARE CENTER
NEW HAVEN, CT 06511
South Central Connecticut Planning Region (203) 789-4044

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 Costin Ionescu's NPI number?

The NPI number for Costin Ionescu is 1063513703. It was assigned to this individual provider in the NPPES registry on September 26, 2006.

Where is Costin Ionescu located?

Costin Ionescu practices at 1450 Chapel St Pvt 202, New Haven, CT 06511. The listed phone number is (203) 789-6045.

What is Costin Ionescu's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Costin Ionescu enrolled in Medicare?

Yes. Costin Ionescu 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 organizations bill Medicare for Costin Ionescu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Costin Ionescu reassigns Medicare benefits to 2 organizations: Mill Hill Medical Consultants Inc (New Haven, CT) and Yale University (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 Costin Ionescu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Costin Ionescu accept?

Health plans from Anthem Blue Cross and Blue Shield list Costin Ionescu 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 Costin Ionescu was last updated on November 25, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.