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DR. LEO ZACHARIAS MD
NPI 1346221777
Internal Medicine in Darby, PA

Active since November 11, 2005PECOS EnrolledAccepts Medicare Assignment
1501 LANSDOWNE AVE FL MOB1, DARBY, PA 19023(610) 534-6310 Get Directions Write a Review

NPPES record last updated: May 19, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 19, 2021, Feb 19, 2018 (2 updates tracked since 2018).

About Dr. Leo Zacharias Md NPPES

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

DR. LEO ZACHARIAS MD (NPI 1346221777) is an individual internal medicine provider in Darby, Pennsylvania, licensed in Pennsylvania (MD050467) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Mercy Catholic Medical Center- Mercy Fitzgerald, and maintains a secondary practice location in Philadelphia.

NPPES Registry Identity

NPI1346221777
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. LEO ZACHARIASCredential: MD
Location Address1501 LANSDOWNE AVE FL MOB1Darby, PA 19023-1333
Mailing Address41 University Dr Ste 106Newtown, PA 18940-1873
Phone(610) 534-6310
Sole ProprietorNo
Medical School CMSOtherGraduated 1989
Enumeration DateNovember 11, 2005
Last NPPES UpdateMay 19, 20212 updates tracked since enumeration
NPPES CertifiedMay 19, 2021
✔ NPI 1346221777 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in PA · MD050467
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1501 LANSDOWNE AVE FL MOB1, Darby, PA 19023
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Secondary Practice Location 1

Location 1501 S 54th StPhiladelphia, PA 19143-1900 · Phone (215) 748-9707 · Fax (215) 748-9708

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter Health, Ambetter Health of Delaware.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. Leo Zacharias Md 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 ID6709875024
PECOS Enrollment IDI20040511000562
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 Leo Zacharias reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mercy Catholic Medical Center Of Southeastern PA
Same address
General Acute Care Hospital
1500 LANSDOWNE AVE
Darby, PA 19023
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 45 clinicians in this Medicare group
NPI 1730173550 (610) 237-4000
Trinity Health Mid-Atlantic Medical Group
Same address
Family Medicine
1501 LANSDOWNE AVE FL 1
Darby, PA 19023
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 646 clinicians in this Medicare group
NPI 1083138770 (610) 534-6310

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 9

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.

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.
280 services142 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
106 services73 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
82 services82 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
52 services51 patients
Influenza vaccine, inactivated 90653
The Influenza vaccine, inactivated, is a shot given to protect against the flu. It contains killed virus particles that help your body build immunity to the flu. It's recommended annually to keep your protection up-to-date. It's safe for ages 6 months and up.
40 services40 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.
20 services17 patients

Hospital Affiliations CMS Care Compare

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

Mercy Catholic Medical Center- Mercy Fitzgerald

Acute Care Hospitals · Darby, PA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390156
Location1500 Lansdowne AveDarby, PA 19023 · Delaware County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 19023 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
$137.17 typical visit price
range $59.88 – $180.99
Typical copayment $34.29 (range $14.97 – $45.24)
Most-billed visit code 99204
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.

Referred Medical Equipment & Supplies CMS DME claims 10

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
8 suppliers19 claims54 services$5.57 avg. paid by Medicare
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
1 supplier12 claims12 services$14.08 avg. paid by Medicare
Nebulizer, with compressor E0570
DME-Other DME · category DE000N
2 suppliers11 claims11 services$3.19 avg. paid by Medicare
Neuromuscular stimulator, electronic shock unit E0745
DME-Other DME · category DE000N
1 supplier11 claims11 services$69.57 avg. paid by Medicare
Rollabout chair, any and all types with casters 5" or greater E1031
DME-Wheelchairs · category DD000N
1 supplier11 claims11 services$29.69 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier12 claims12 services$66.71 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 2

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

DANIEL SUNG MD
Internal Medicine
1501 LANSDOWNE AVE FL MOB1
DARBY, PA 19023
Delaware County (610) 534-6310
MERCY MANAGEMENT OF SOUTHEASTERN PENNSYLVANIA
Urology
1501 LANSDOWNE AVE FL MOB1
DARBY, PA 19023
Delaware County (610) 237-4104

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 Leo Zacharias's NPI number?

The NPI number for Leo Zacharias is 1346221777. It was assigned to this individual provider in the NPPES registry on November 11, 2005.

Where is Leo Zacharias located?

Leo Zacharias practices at 1501 Lansdowne Ave Fl Mob1, Darby, PA 19023. The listed phone number is (610) 534-6310.

What is Leo Zacharias's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Leo Zacharias enrolled in Medicare?

Yes. Leo Zacharias 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 Leo Zacharias's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Leo Zacharias reassigns Medicare benefits to 2 organizations: Mercy Catholic Medical Center Of Southeastern PA (Darby, PA) and Trinity Health Mid-Atlantic Medical Group (Darby, PA). 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 Leo Zacharias's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Leo Zacharias accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list Leo Zacharias 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.

Is Leo Zacharias affiliated with any hospitals?

According to CMS data, Leo Zacharias is affiliated with Mercy Catholic Medical Center- Mercy Fitzgerald.

When was this NPI record last updated?

The NPPES record for Leo Zacharias was last updated on May 19, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.