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WILLIAM STERIOUS MD
NPI 1801860663
Emergency Medicine in Bryn Mawr, PA

Active since February 16, 2006PECOS Enrolled
130 SOUTH BRYN MAWR AVENUE, BRYN MAWR, PA 19010(610) 526-3583(610) 526-3614 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About William Sterious Md NPPES

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

WILLIAM STERIOUS MD (NPI 1801860663) is an individual emergency medicine provider in Bryn Mawr, Pennsylvania, licensed in Pennsylvania (MD072708L) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1801860663
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameWILLIAM STERIOUSCredential: MD
Location Address130 SOUTH BRYN MAWR AVENUEBryn Mawr, PA 19010
Mailing AddressPo Box 3012Wilmington, DE 19804 · (800) 456-4629 · Fax (302) 224-2848
Phone(610) 526-3583
Fax(610) 526-3614
Sole ProprietorNo
Enumeration DateFebruary 16, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1801860663 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in PA · MD072708L
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
130 SOUTH BRYN MAWR AVENUE, Bryn Mawr, PA 19010
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Other Identifiers 1

Medicaid0018748080002PA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Sterious 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 Reassignment

Medicare enrollment records show William Sterious reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Main Line Emergency Med Associates LLC
9.5 mi
Emergency Medicine
255 W LANCASTER AVE
Paoli, PA 19301
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 78 clinicians in this Medicare group
NPI 1316919368 (610) 648-1043

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 6

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
479 services466 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
349 services342 patients
Electrocardiogram (ecg) 1 to 3 leads with review by physician only 93042
An Electrocardiogram (ECG) is a non-invasive test that records the electrical activity of your heart. 1 to 3 leads or sensors are placed on your body to capture this data. A physician then reviews the results to evaluate your heart's health.
166 services163 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.
159 services156 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
77 services76 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
15 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19010 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
$92.69 typical visit price
range $59.88 – $180.99
Typical copayment $23.17 (range $14.97 – $45.24)
Most-billed visit code 99203
Established Patient
$105.21 typical visit price
range $19.30 – $147.29
Typical copayment $26.30 (range $4.82 – $36.82)
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 17

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

LORRAINE M CHAMBERS, CRNA
Nurse Anesthetist, Certified Registered
130 SOUTH BRYN MAWR AVENUE, BRYN MAWR HOSPITAL ANESTHESIA DEPT.
BRYN MAWR, PA 19010
Delaware County (610) 526-3000
DEBORAH MCTAMNEY CRNA
Nurse Anesthetist, Certified Registered
130 SOUTH BRYN MAWR AVENUE, BRYN MAWR HOSPITAL ANESTHESIA DEPT.
BRYN MAWR, PA 19010
Delaware County (610) 526-3000
CHRISTOPHER X DALY MD
Emergency Medicine
130 SOUTH BRYN MAWR AVENUE
BRYN MAWR, PA 19010
Delaware County (610) 526-3583
ANN M AMBROSE CRNA
Nurse Anesthetist, Certified Registered
130 SOUTH BRYN MAWR AVENUE, BRYN MAWR HOSPITAL ANESTHESIA DEPT.
BRYN MAWR, PA 19010
Delaware County (610) 526-3000
GREGORY W HIGBEE DO
Emergency Medicine
130 SOUTH BRYN MAWR AVENUE
BRYN MAWR, PA 19010
Delaware County (610) 526-3583
LEONARD P ULAN JR. DO
Emergency Medicine
130 SOUTH BRYN MAWR AVENUE
BRYN MAWR, PA 19010
Delaware County (610) 526-3583
FREDERICK KOTALIK MD
Emergency Medicine
130 SOUTH BRYN MAWR AVENUE
BRYN MAWR, PA 19010
Delaware County (610) 526-3583
LEONARD M CHECCHIO MD FACEP
Emergency Medicine
130 SOUTH BRYN MAWR AVENUE
BRYN MAWR, PA 19010
Delaware County (610) 526-3583

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 William Sterious's NPI number?

The NPI number for William Sterious is 1801860663. It was assigned to this individual provider in the NPPES registry on February 16, 2006.

Where is William Sterious located?

William Sterious practices at 130 South Bryn Mawr Avenue, Bryn Mawr, PA 19010. The listed phone number is (610) 526-3583.

What is William Sterious's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is William Sterious enrolled in Medicare?

Yes. William Sterious is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for William Sterious's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Sterious reassigns Medicare benefits to Main Line Emergency Med Associates LLC (Paoli, PA). 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 William Sterious's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Sterious was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.