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ALI MENDELSON MD
NPI 1497741532
Emergency Medicine - Pediatric Emergency Medicine in Philadelphia, PA

Active since September 23, 2005PECOS Enrolled
3401 CIVIC CENTER BLVD, PHILADELPHIA, PA 19104(800) 879-2467 Get Directions Write a Review

NPPES record last updated: December 18, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 6, 2019, Sep 13, 2019 (2 updates tracked since 2019).

About Ali Mendelson Md NPPES

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

ALI MENDELSON MD (NPI 1497741532) is an individual pediatric emergency medicine provider in Philadelphia, Pennsylvania, licensed in Pennsylvania (MD468483) and active in the NPI registry since September 2005. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1497741532
Entity TypeIndividualFemale
Primary Taxonomy207PP0204X
Provider Legal NameALI MENDELSONCredential: MD
Location Address3401 CIVIC CENTER BLVDPhiladelphia, PA 19104-4319
Mailing Address3401 Civic Center Blvd Ste M975Philadelphia, PA 19104-4319
Phone(800) 879-2467
Sole ProprietorNo
Enumeration DateSeptember 23, 2005
Last NPPES UpdateDecember 18, 20232 updates tracked since enumeration
NPPES CertifiedDecember 18, 2023
✔ NPI 1497741532 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyEmergency Medicine · Pediatric Emergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207PP0204X
License✔ Licensed in PA · MD468483
Definition
Pediatric Emergency Medicine is a clinical subspecialty that focuses on the care of the acutely ill or injured child in the setting of an emergency department.
Also ListedPediatricsTaxonomy 208000000X · License 233946 (NY)
Also ListedHospitalistTaxonomy 208M00000X · License MD468483 (PA)
3401 CIVIC CENTER BLVD, Philadelphia, PA 19104
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1400 E Main St, 4th FloorMount Kisco, NY 10549-3417 · Phone (914) 666-1200 · Fax (914) 666-1973
Location 2130 S Bryn Mawr AveBryn Mawr, PA 19010-3121 · Phone (484) 337-3000

Other Identifiers 10

Other3C5202Healthnet Grp Id#
Other634Z61Empire Bcbs Provider Id#
Other000000092370Ghi Hmo Provider Id#
Other7187742Aetna-ppo Provider Id#
Other10101978-U104Cdphp Provider & Grp Id#
Other0604050000013Fideliscare Provider Id#
Other1093491Aetna-hmo Provider Id#
OtherP3627881Oxford Health Plan Pin#
Medicaid02727509NY
Other388179Mvp Healthplan Pin#

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

North Shore - Lij Medical PC
96 mi
Internal Medicine
270-05 76TH AVE
New Hyde Park, NY 11040
  • Reassigned Medicare billing, New York enrollment
  • 9,353 clinicians in this Medicare group
NPI 1790043479 (516) 465-8089

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 19104 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 20

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

AARON DORFMAN M.D.
Pediatrics (Pediatric Cardiology)
3401 CIVIC CENTER BLVD, CHILDREN'S HOSPITAL OF PHILADELPHIA - CARDIOLOGY
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-4040
MS. NICOLE MARIE KOEPKE CRNP
Nurse Practitioner (Pediatrics)
3401 CIVIC CENTER BLVD, CHILDREN'S HOSPITAL OF PHILADELPHIA - EMERGENCY MED
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1944
DR. CASSANDRA ALYS LIGH MD
Surgery (Plastic and Reconstructive Surgery)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-2208
DR. PREETI SOI
Psychiatry & Neurology (Child & Adolescent Psychiatry)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-7555
ROSALIND USHER M.D.
Pediatrics (Developmental - Behavioral Pediatrics)
3401 CIVIC CENTER BLVD, DIVISION OF DEVELOPMENTAL AND BEHAVIORAL PEDIATRICS
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-6336
DR. MATTHEW DAVID SCHREIER MD
Pediatrics (Pediatric Cardiology)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1000
DR. TERRENCE CALDWELL JR. PHARMD
Pharmacist (Pediatrics)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1000
ALYSSA STIEFEL CRNP
Nurse Practitioner (Pediatrics)
3401 CIVIC CENTER BLVD
PHILADELPHIA, PA 19104
Philadelphia County (215) 590-1000

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 Ali Mendelson's NPI number?

The NPI number for Ali Mendelson is 1497741532. It was assigned to this individual provider in the NPPES registry on September 23, 2005.

Where is Ali Mendelson located?

Ali Mendelson practices at 3401 Civic Center Blvd, Philadelphia, PA 19104. The listed phone number is (800) 879-2467.

What is Ali Mendelson's specialty?

The primary specialty registered for this NPI is Emergency Medicine, specializing in Pediatric Emergency Medicine, with taxonomy code 207PP0204X.

Is Ali Mendelson enrolled in Medicare?

Yes. Ali Mendelson is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Ali Mendelson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ali Mendelson reassigns Medicare benefits to North Shore - Lij Medical PC (New Hyde Park, NY). 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 Ali Mendelson'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 Ali Mendelson was last updated on December 18, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.