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

Chad Achenbach, MD

Individual provider Infectious Disease Physician · NPI 1548278674

Chad Achenbach, MD is registered under Infectious Disease in Chicago, Illinois. Graduated from Northwestern University Feinberg Medical School in 2002, 24 years ago. Practices with Northwestern Medical Faculty Foundation, a 4,394-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Illinois and Washington.

Years since qualifying
24
Trained at
Northwestern University Feinberg Medical School
Licensed in
IL, WA
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.

See every abbreviation used in this directory →

Practice location Address checks out

645 N Michigan Ave Ste 900
Chicago, IL 60611-2826 Not confirmed with CMS for 17 years — call before visiting
Phone: (312) 695-5090
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence 036-111770 (IL)
Infectious Disease Physician Taxonomy 207RI0200X · Licence MD00046399 (WA)

Record details

NPI number1548278674
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 4, 2006
Last updated in NPPESJuly 13, 2009

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 2002 (24 years in practice)
Group practice Northwestern Medical Faculty Foundation — 4394 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations9 on file with Medicare

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 patients98
Services billed 173 a service is one billed item, such as a visit, a test or a procedure
Average patient age68

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 Northwestern Medical Faculty Foundation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 4394 clinicians in the practice; 12 are shown here.

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