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LEROI STEPHENSON M.D.
NPI 1598909384
Anesthesiology in New Haven, CT

Active since April 24, 2009PECOS EnrolledAccepts Medicare Assignment
333 CEDAR ST, TMP 3, NEW HAVEN, CT 06510(203) 785-2802 Get Directions Write a Review

NPPES record last updated: June 28, 2010. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Leroi Stephenson M.d. NPPES

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

LEROI STEPHENSON M.D. (NPI 1598909384) is an individual anesthesiology provider in New Haven, Connecticut, licensed in Connecticut (048844) and active in the NPI registry since April 2009. He is enrolled in Medicare PECOS, is affiliated with Spectrum Health, and is a graduate of Other (2003).

NPPES Registry Identity

NPI1598909384
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameLEROI STEPHENSONCredential: M.D.
Location Address333 CEDAR ST, TMP 3New Haven, CT 06510-3206
Mailing Address333 Cedar St, Tmp 3New Haven, CT 06510-3206 · (203) 785-2802
Phone(203) 785-2802
Sole ProprietorNo
Medical School CMSOtherGraduated 2003
Enumeration DateApril 24, 2009
Last NPPES UpdateJune 28, 2010
✔ NPI 1598909384 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in CT · 048844✔ Licensed in NY · 235862
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
333 CEDAR ST, New Haven, CT 06510
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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

Leroi Stephenson M.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 ID749472132
PECOS Enrollment IDI20150317000161, I20251201003749, I20260115001286
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

6

Medicare enrollment records show Leroi Stephenson reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Physicians Of University Hospital, PC
43 mi
Anesthesiology
301 E MAIN ST
Bay Shore, NY 11706
  • Reassigned Medicare billing, New York enrollment
  • 530 clinicians in this Medicare group
NPI 1023513116 (631) 968-3163
North Shore - Lij Anesthesiology, PC
44 mi
Anesthesiology
480 BEDFORD RD BLDG B
Chappaqua, NY 10514
  • Reassigned Medicare billing, New York enrollment
  • 1,406 clinicians in this Medicare group
NPI 1417401266 (914) 666-8866
Westchester Medical Center Advanced Physician Services PC
48 mi
Anesthesiology
100 WOODS RD, TAYLOR PAVILION - ROOM M229
Valhalla, NY 10595
  • Reassigned Medicare billing, New York enrollment
  • 1,663 clinicians in this Medicare group
NPI 1740687458 (914) 493-2844
Physician Affiliate Group Of New York PC
62 mi
Dietitian, Registered
506 LENOX AVE
New York, NY 10037
  • Reassigned Medicare billing, New York enrollment
  • 2,094 clinicians in this Medicare group
NPI 1013375526 (212) 939-2467
Rwjbh Observation Associates LLC
81 mi
Emergency Medicine
94 OLD SHORT HILLS RD
Livingston, NJ 07039
  • Reassigned Medicare billing, New Jersey enrollment
  • 1,913 clinicians in this Medicare group
NPI 1760095806 (888) 724-7123
Spectrum Health Primary Care Partners
658 mi
Radiology
4100 LAKE DR SE, SUITE 102
Grand Rapids, MI 49546
  • Reassigned Medicare billing, Michigan enrollment
  • 2,446 clinicians in this Medicare group
NPI 1528374683 (616) 974-4800

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 5

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.

Anesthesia for procedure to assess heart electrical activity 00537
Anesthesia for a procedure to assess heart electrical activity helps ensure comfort and relaxation. It involves administering medication that either numbs a specific area or makes you sleep temporarily. This allows doctors to safely examine your heart's electrical signals without causing discomfort.
26 services26 patients
Anesthesia for placement or revision of blood flow shunt 01844
Anesthesia for blood flow shunt placement or revision ensures comfort during the procedure. It involves medication to numb or induce sleep, preventing pain or discomfort. It's safe, monitored by professionals, and tailored to individual needs.
17 services17 patients
Insertion of artery tube for blood sampling or infusion through skin 36620
This procedure involves placing a small tube into an artery, usually in the wrist or elbow, to collect blood samples or administer medication. It's done under local anesthesia and is a common, safe practice.
17 services16 patients
Anesthesia for insertion of permanent heart pacemaker 00530
Anesthesia for a permanent heart pacemaker insertion helps to ensure comfort and calmness during the procedure. It's typically a local anesthetic, numbing the area where the pacemaker is inserted. Sedation may also be given to help you relax. You'll be awake, but may not remember the procedure.
13 services13 patients
Anesthesia for x-ray on artery of neck or heart 01925
Anesthesia for an X-ray on the artery of your neck or heart ensures comfort during the procedure. It involves medication to numb or make you unconscious, so you don't feel pain. It's safe, monitored by professionals, and wears off after the procedure.
11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Spectrum Health

Acute Care Hospitals · Grand Rapids, MI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230038
Location100 Michigan St NEGrand Rapids, MI 49503 · Kent County
Emergency services Birthing friendly

Community Medical Center

Acute Care Hospitals · Toms River, NJ
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number310041
Location99 Rt 37 WestToms River, NJ 08755 · Ocean County
Emergency services Birthing friendly

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. BRIAN CHRISTOPHER CAMBI M.D.
Internal Medicine (Interventional Cardiology)
333 CEDAR ST, DCB 3
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-4129
MATTHEW JOSEPH MCCONNELL M.D.
Internal Medicine (Gastroenterology)
333 CEDAR ST, YNHH INTERNAL MEDICINE-GI,SECTION OF DIGESTIVE DISEASES
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-7012
DR. SRI SMITHA KANAPARTHY M.D.
Anesthesiology (Pediatric Anesthesiology)
333 CEDAR ST, TMP 3
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-2802
SUNDES KAZMIR M.D.
Student in an Organized Health Care Education/Training Program
333 CEDAR ST, YALE-NEW HAVEN HOSPITAL DEPARTMENT OF PEDIATRICS
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-1947
ANASTASIA KOPTELOVA MD
Anesthesiology
333 CEDAR ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-4242
ROBERT MCNAMARA MD
Internal Medicine (Cardiovascular Disease)
333 CEDAR ST, FMP 3
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-4127
DR. BRANDI PARKER COTTON APRN
Nurse Practitioner (Psychiatric/Mental Health)
333 CEDAR ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 432-1333
SARAH ELIZABETH SCHELLHORN MD
Internal Medicine (Medical Oncology)
333 CEDAR ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-4095

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 Leroi Stephenson's NPI number?

The NPI number for Leroi Stephenson is 1598909384. It was assigned to this individual provider in the NPPES registry on April 24, 2009.

Where is Leroi Stephenson located?

Leroi Stephenson practices at 333 Cedar St Tmp 3, New Haven, CT 06510. The listed phone number is (203) 785-2802.

What is Leroi Stephenson's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Leroi Stephenson enrolled in Medicare?

Yes. Leroi Stephenson 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 Leroi Stephenson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Leroi Stephenson reassigns Medicare benefits to 6 organizations: Physicians Of University Hospital, PC (Bay Shore, NY), North Shore - Lij Anesthesiology, PC (Chappaqua, NY), Westchester Medical Center Advanced Physician Services PC (Valhalla, NY), Physician Affiliate Group Of New York PC (New York, NY), Rwjbh Observation Associates LLC (Livingston, NJ) and 1 more organization, listed in the Medicare section above. 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 Leroi Stephenson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Leroi Stephenson affiliated with any hospitals?

According to CMS data, Leroi Stephenson is affiliated with Spectrum Health and Community Medical Center.

When was this NPI record last updated?

The NPPES record for Leroi Stephenson was last updated on June 28, 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.