Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

General Surgery

Marian P. McDonald, MD

Works at hospitals in Lancaster, PA · Pennsylvania

Summary

Dr. Marian P. McDonald, MD is a general surgeon at 2108 Harrisburg Pike, Suite 100, Lancaster, PA 17601. Phone: (717) 544-0235. Accepts Medicare assignment. In 2024, Marian P. McDonald had 202 Original Medicare patients and 372 services. NPI 1477506921. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: General surgeon (Medicare lists General Surgery)
  • Address: 2108 Harrisburg Pike, Suite 100, Lancaster, PA 17601 · Directions (1 more location)
  • Phone: (717) 544‑0235
  • Medicare: Accepts Medicare assignment
  • Hospital: Lancaster General Hospital
  • Group practice: Lancaster General Medical Group
  • Medical school: Pennsylvania State University College Of Medicine · graduated 1990 (36 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Marian P. McDonald, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Marian P. McDonald accept Medicare assignment?
Yes. Medicare's clinician data says Marian P. McDonald accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Marian P. McDonald see?
In 2024, CMS data shows 202 Original Medicare patients and 372 services for Marian P. McDonald. This counts Original Medicare only and measures volume, not quality.
What is Marian P. McDonald's NPI number?
1477506921. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Marian P. McDonald, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients202
Services billed to Medicare372
Different services or procedures55
Participating Medicare providerYes
Average age of these patients72

Most frequent services

  1. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)57 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)50 services
  3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)47 services
  4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)28 services
  5. Biopsy of large bowel using a flexible endoscope (45380)23 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • High blood pressure73%
  • Arthritis48%
  • Anxiety38%
  • Chronic kidney disease36%
  • Depression34%

Hospitals where Marian P. McDonald works

Medicare's Facility Affiliation Data lists Marian P. McDonald at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Marian P. McDonald is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Marian P. McDonald as a member of this group (CMS data updated October 2, 2026).

  • Lancaster General Medical Group586 clinicians in the group

Specialties

Find other General Surgery doctors in Pennsylvania →

Other general surgeons in Lancaster

Clinicians with the same Medicare primary specialty in Lancaster, PA — not a recommendation.

All general surgeons in Lancaster →

Other clinicians in Lancaster General Medical Group

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolPennsylvania State University College Of Medicine
Graduation year1990 (36 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1477506921
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians