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MALLORY LOSTUMBO
NPI 1073923132
Pediatrics in Rockville, MD

Active since April 29, 2014PECOS Enrolled
1201 SEVEN LOCKS RD STE 201, ROCKVILLE, MD 20854(301) 881-7995(240) 236-9865 Get Directions Write a Review

NPPES record last updated: March 31, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Mar 31, 2025, May 17, 2019 (2 updates tracked since 2019).

About Mallory Lostumbo NPPES

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

MALLORY LOSTUMBO (NPI 1073923132) is an individual pediatrics provider in Rockville, Maryland, licensed in Maryland (D83313) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1073923132
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameMALLORY LOSTUMBO
Location Address1201 SEVEN LOCKS RD STE 201Rockville, MD 20854-2963
Mailing Address6201 Greenleigh AveMiddle River, MD 21220-2004 · Fax (240) 236-9865
Phone(301) 881-7995
Fax(240) 236-9865
Sole ProprietorNo
Enumeration DateApril 29, 2014
Last NPPES UpdateMarch 31, 20252 updates tracked since enumeration
NPPES CertifiedMarch 31, 2025
✔ NPI 1073923132 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in MD · D83313
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
1201 SEVEN LOCKS RD STE 201, Rockville, MD 20854
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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 (PECOS)

Mallory Lostumbo 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 Mallory Lostumbo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Johns Hopkins Community Physicians, Inc
10 mi
Skilled Nursing Facility
7929 WESTPARK DR
Tysons, VA 22102
  • Reassigned Medicare billing, District of Columbia and Maryland enrollments
  • Also billed through NPI 1689485963 (Maryland)
  • 691 clinicians in this Medicare group
NPI 1790631695 (571) 617-0200

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 20854 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
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
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 6

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

NICOLE WOODARD ULIASSI
Pediatrics
1201 SEVEN LOCKS RD STE 201
ROCKVILLE, MD 20854
Montgomery County (301) 881-7995
PEDIATRIC CARE OF ROCKVILLE PA
Pediatrics
1201 SEVEN LOCKS RD STE 201
ROCKVILLE, MD 20854
Montgomery County (301) 881-7995
JOHNS HOPKINS COMMUNITY PHYSICIANS, INC
Internal Medicine
1201 SEVEN LOCKS RD STE 201
ROCKVILLE, MD 20854
Montgomery County (410) 933-0000
JOHNS HOPKINS COMMUNITY PHYSICIANS, INC
Internal Medicine
1201 SEVEN LOCKS RD STE 201
ROCKVILLE, MD 20854
Montgomery County (301) 881-7995
PEDIATRIC CARE OF ROCKVILLE PA
Clinic/Center (Adolescent and Children Mental Health)
1201 SEVEN LOCKS RD STE 201
ROCKVILLE, MD 20854
Montgomery County (301) 881-7995
JILL CAMPBELL TROILO MD
Pediatrics
1201 SEVEN LOCKS RD STE 201
ROCKVILLE, MD 20854
Montgomery County (301) 881-7995

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 Mallory Lostumbo's NPI number?

The NPI number for Mallory Lostumbo is 1073923132. It was assigned to this individual provider in the NPPES registry on April 29, 2014.

Where is Mallory Lostumbo located?

Mallory Lostumbo practices at 1201 Seven Locks Rd Ste 201, Rockville, MD 20854. The listed phone number is (301) 881-7995.

What is Mallory Lostumbo's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Mallory Lostumbo enrolled in Medicare?

Yes. Mallory Lostumbo is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mallory Lostumbo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mallory Lostumbo reassigns Medicare benefits to Johns Hopkins Community Physicians, Inc (Tysons, VA). 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 Mallory Lostumbo'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 Mallory Lostumbo was last updated on March 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.