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

Michael Haak, MD

Individual provider Orthopaedic Surgery Physician · NPI 1780799262

Michael Haak, MD practises Orthopedic Surgery in Danville, Pennsylvania. Graduated from Medical College of Wisconsin in 1984, 42 years ago. Practices with Geisinger Clinic, a 3,413-clinician group and accepts Medicare assignment. Licensed in Illinois and Pennsylvania.

Years since qualifying
42
Trained at
Medical College of Wisconsin
Licensed in
IL, PA
In the registry since
2006
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

100 N Academy Ave
Danville, PA 17822-4546
Phone: (570) 271-6541
Fax: (570) 271-5872
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence MD448162 (PA)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 036-080069 (IL)

Record details

NPI number1780799262
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 21, 2006
Last updated in NPPESAugust 17, 2020
Certification dateAugust 17, 2020

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 1984 (42 years in practice)
Group practice Geisinger Clinic — 3413 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Laminectomy or laminotomy (partial removal of spine bones) 48 times · 76th percentile
Spinal fusion 54 times · 57th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients203
Services billed 367 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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. Those with a page here are linked.

Also affiliated with 1 inpatient rehabilitation facility, which CMS identifies by certification number only.

Colleagues at Geisinger Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3413 clinicians in the practice; 12 are shown here.

Other providers in Danville