Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

William McGuinn, MD

Individual provider Anesthesiology Physician · NPI 1225014087

William McGuinn, MD practises Anesthesiology in York, Pennsylvania. Graduated from Saint Louis University School of Medicine in 1981, 45 years ago. Practices with Wellspan Medical Group, a 2,342-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Illinois and Pennsylvania.

Years since qualifying
45
Trained at
Saint Louis University School of Medicine
Licensed in
IL, PA
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1001 S George St
York, PA 17403-3676
Phone: (717) 812-7687
Fax: (717) 851-5250
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 55 Monument Rd, York, PA 17403-5023 — (717) 812-6425
  • 25 Monument Rd Ste 270, York, PA 17403-5073 — (717) 741-8250

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence MD029099E (PA)
Anesthesiology Physician Taxonomy 207L00000X · Licence 036147710 (IL)

Record details

NPI number1225014087
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 22, 2005
Last updated in NPPESMarch 27, 2026
Certification dateMarch 27, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolSAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1981 (45 years in practice)
Group practice Wellspan Medical Group — 2342 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients93
Services billed 97 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Wellspan Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2342 clinicians in the practice; 12 are shown here.

Other providers in York