MEDICAL ASSOCIATES OF THE MAIN LINE, PC
NPI 1033276076
Hospitalist in Malvern, PA

Q: What is Medical Associates Of The Main Line, PC's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Active since January 02, 2007

414 PAOLI PIKE, MALVERN, PA 19355(484) 596-5981 Get Directions Write a Review

NPPES record last updated: May 19, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 19, 2025, Mar 5, 2024 (2 updates tracked since 2024).

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About Medical Associates Of The Main Line, Pc NPPES

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

MEDICAL ASSOCIATES OF THE MAIN LINE, PC (NPI 1033276076) is a healthcare organization registered as a hospitalist in Malvern, Pennsylvania and active in the NPI registry since January 2007. The organization lists David N Horwich, President, as its authorized official.

NPPES Registry Identity

NPI1033276076

Entity TypeOrganization

Primary Taxonomy208M00000X

Legal Business NameMEDICAL ASSOCIATES OF THE MAIN LINE, PC

Location Address414 PAOLI PIKEMalvern, PA 19355-3311

Mailing AddressPo Box 19498Belfast, ME 04915-4089 · (484) 596-5981 · Fax (484) 596-4558

Phone(484) 596-5981

Organization SubpartNo

Authorized OfficialDavid N HorwichPresident · (484) 596-7860

Enumeration DateJanuary 2, 2007

Last NPPES UpdateMay 19, 20252 updates tracked since enumeration

NPPES CertifiedMay 19, 2025

✔ NPI 1033276076 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

414 PAOLI PIKE, Malvern, PA 19355

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Other Identifiers 2

Medicaid001245376PA

Medicaid0000421902DE

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Medical Associates Of The Main Line, Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 4 clinicians reassign Medicare billing to Medical Associates Of The Main Line, PC, which bills Medicare for the services they deliver. Of these, 4 practice at this address. They are listed nearest first.

Clinicians, nearest first (4)

David Horwich, MD

Hospitalist

NPI 1972697274

414 PAOLI PIKE
Malvern, PA 19355

(610) 640-3943

✔ PECOS✔ Accepts MedicareSame address

Jeanne Lasota, MD

Hospitalist

NPI 1881755874

414 PAOLI PIKE
Malvern, PA 19355

(484) 596-3963

✔ PECOS✔ Accepts MedicareSame address

Scott Sapperstein, MD

Hospitalist

NPI 1235223454

414 PAOLI PIKE
Malvern, PA 19355

(484) 596-3963

✔ PECOS✔ Accepts MedicareSame address

Yuan Zhang, M.D.

Hospitalist

NPI 1790920999

414 PAOLI PIKE
Malvern, PA 19355

(484) 596-7869

✔ PECOS✔ Accepts MedicareSame address

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

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 Medical Associates Of The Main Line, PC's NPI number?

The NPI number for Medical Associates Of The Main Line, PC is 1033276076. It was assigned to this organization in the NPPES registry on January 2, 2007.

Where is Medical Associates Of The Main Line, PC located?

Medical Associates Of The Main Line, PC is located at 414 Paoli Pike, Malvern, PA 19355. The listed phone number is (484) 596-5981.

What is Medical Associates Of The Main Line, PC's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Medical Associates Of The Main Line, PC enrolled in Medicare?

Yes. Medical Associates Of The Main Line, PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Medical Associates Of The Main Line, PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians, all in Hospitalist, reassign their Medicare billing to Medical Associates Of The Main Line, PC. A 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 the clinician's services. Of these, 4 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Medical Associates Of The Main Line, PC was last updated on May 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.