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MARGARET OLSEN LEWEN MD
NPI 1811350168
Pediatrics - Pediatric Critical Care Medicine in Pittsburgh, PA

Active since April 04, 2016PECOS Enrolled
4401 PENN AVENUE, SUITE 02000, PITTSBURGH, PA 15224(412) 647-3136 Get Directions Write a Review

NPPES record last updated: July 7, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 7, 2025, Jul 12, 2022, Jul 9, 2019 (3 updates tracked since 2019).

About Margaret Olsen Lewen Md NPPES

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

MARGARET OLSEN LEWEN MD (NPI 1811350168) is an individual pediatric critical care medicine provider in Pittsburgh, Pennsylvania, licensed in Pennsylvania (MD467134) and active in the NPI registry since April 2016. She is enrolled in Medicare PECOS and maintains a secondary practice location in Boston.

NPPES Registry Identity

NPI1811350168
Entity TypeIndividualFemale
Primary Taxonomy2080P0203X
Provider Legal NameMARGARET OLSEN LEWENCredential: MD
Location Address4401 PENN AVENUE, SUITE 02000Pittsburgh, PA 15224
Mailing Address200 Lothrop StPittsburgh, PA 15213-2536
Phone(412) 647-3136
Sole ProprietorNo
Enumeration DateApril 4, 2016
Last NPPES UpdateJuly 7, 20253 updates tracked since enumeration
NPPES CertifiedJuly 7, 2025
✔ NPI 1811350168 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080P0203X
License✔ Licensed in PA · MD467134
Definition
A pediatrician expert in advanced life support for children from the term or near-term neonate to the adolescent. This competence extends to the critical care management of life-threatening organ system failure from any cause in both medical and surgical patients and to the support of vital physiological functions. This specialist may have administrative responsibilities for intensive care units and also facilitates patient care among other specialists.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
4401 PENN AVENUE, Pittsburgh, PA 15224
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Secondary Practice Location 1

Location 1300 Longwood Ave Pavilion 129, Housestaff Lounge,, Boston Childrens Hospital, Hunnewell BuildingBoston, MA 02115 · Phone (203) 313-9434

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Margaret Olsen Lewen 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 Margaret Lewen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Pittsburgh Physicians
Same address
Pediatrics
4401 PENN AVE
Pittsburgh, PA 15224
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 7,114 clinicians in this Medicare group
NPI 1225096639 (412) 692-5325

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

OKAN CAPUK M.D.
Student in an Organized Health Care Education/Training Program
4401 PENN AVENUE
PITTSBURGH, PA 15224
Allegheny County (412) 692-5285
KELLY NICOLE SCHOOPING TRIPI
Genetic Counselor, MS
4401 PENN AVENUE, CHL 03-05-01
PITTSBURGH, PA 15224
Allegheny County (114) 126-9259
MAHIMA RAJAN D.O.
Student in an Organized Health Care Education/Training Program
4401 PENN AVENUE
PITTSBURGH, PA 15224
Allegheny County (412) 692-5530
ELLEN AAKER REYNOLDS CRNP
Nurse Practitioner (Pediatrics)
4401 PENN AVENUE, CHILDREN'S HOSPITAL OF PITTSBURGH
PITTSBURGH, PA 15224
Allegheny County (412) 366-9443
MS. CHRISTINE DEBRA MUNRO CGC
Genetic Counselor, MS
4401 PENN AVENUE, AOB SUITE 1300, RM 1308
PITTSBURGH, PA 15224
Allegheny County (412) 692-7640
TARA DALY RUSSELL M.D.
Student in an Organized Health Care Education/Training Program
4401 PENN AVENUE
PITTSBURGH, PA 15224
Allegheny County (412) 692-5325
SOPHIA SUNG HOM M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery)
4401 PENN AVENUE, 5TH FL. FACULTY PAVILION
PGH, PA 15224
Allegheny County (412) 692-7626
MISS NIKKAN DAS MD
Pediatrics
4401 PENN AVENUE, 5TH FLOOR FACULTY PAVILON
PITTSBURGH, PA 15224
Allegheny County (215) 590-2164

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 Margaret Lewen's NPI number?

The NPI number for Margaret Lewen is 1811350168. It was assigned to this individual provider in the NPPES registry on April 4, 2016.

Where is Margaret Lewen located?

Margaret Lewen practices at 4401 Penn Avenue Suite 02000, Pittsburgh, PA 15224. The listed phone number is (412) 647-3136.

What is Margaret Lewen's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.

Is Margaret Lewen enrolled in Medicare?

Yes. Margaret Lewen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Margaret Lewen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Lewen reassigns Medicare benefits to University Of Pittsburgh Physicians (Pittsburgh, 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 Margaret Lewen'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 Margaret Lewen was last updated on July 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.