Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

William G Grehan, MD

Individual provider Anesthesiology Physician · NPI 1417961061

William G Grehan, MD is an Anesthesiology in Melrose Park, Illinois. Qualified in 1992, 34 years ago. Practices with Black Hills Surgical Hospital LLC, a 169-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois and South Carolina.

Years since qualifying
34
Licensed in
IL, SC
In the registry since
2006
Specialties on file
3
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

701 W North Ave
Melrose Park, IL 60160-1612
Phone: (708) 681-3202
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4440 W 95th St, Oak Lawn, IL 60453-2600 — (708) 684-8000

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 89895 (SC)
Anesthesiology Physician Taxonomy 207L00000X · Licence 036-082615 (IL)
Pain Medicine (Anesthesiology) Physician Taxonomy 207LP2900X · Licence 036-082615 (IL)

Record details

NPI number1417961061
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 28, 2006
Last updated in NPPESApril 22, 2025
Certification dateApril 22, 2025
Mailing address1121 Lake Cook Rd, Ste M, Deerfield, IL 60015-5234

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 1992 (34 years in practice)
Group practice Black Hills Surgical Hospital Llc — 169 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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