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

MS. Mary Ann Holem, FNP-BC

Individual provider Nurse Practitioner · NPI 1972897791

MS. Mary Ann Holem, FNP-BC is a Nurse Practitioner in Crystal Lake, Illinois. Qualified in 2009, 17 years ago. Practices with Lake County Acute Care LLP, an 18-clinician group, works from 5 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
17
Licensed in
IL
In the registry since
2011
Specialties on file
2
What do these letters mean?
FNP-BC — Family Nurse Practitioner, Board Certified
A family nurse practitioner certified by the ANCC.

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Practice location Address checks out

360 Station Dr
Crystal Lake, IL 60014
Phone: (815) 338-6600
Fax: (815) 455-8044
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (4)

  • 10350 Haligus Rd, Huntley, IL 60142-9545 — (815) 338-6600
  • 2507 N Richmond Rd, McHenry, IL 60051-5407 — (815) 338-6600
  • 1925 Huntley Rd, West Dundee, IL 60118-9301 — (815) 338-6600
  • 2520 Elisha Ave, Zion, IL 60099-2676 — (847) 872-4561

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 209008856 (IL)
Nurse Practitioner Taxonomy 363L00000X · Licence 209008856 (IL)

Record details

NPI number1972897791
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-BC
Sole proprietorNo
NPI enumeratedJune 9, 2011
Last updated in NPPESOctober 19, 2018

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2009 (17 years in practice)
Group practice Lake County Acute Care Llp — 18 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Other providers in Crystal Lake