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

Alexander A Stemer, MD

Individual provider Infectious Disease Physician · NPI 1861451429

Alexander A Stemer, MD is registered under Infectious Disease in Munster, Indiana. Qualified in 1973, 53 years ago. Practices with Advanced Care Medical Specialists PC, a 7-clinician group and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
53
Licensed in
IN
In the registry since
2006
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

10110 Don S Powers Dr Ste 101D
Munster, IN 46321-4158
Phone: (219) 922-3002
Fax: (219) 922-3003
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence 01025591 (IN)

Record details

NPI number1861451429
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 22, 2006
Last updated in NPPESApril 14, 2021
Certification dateApril 14, 2021

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1973 (53 years in practice)
Group practice Advanced Care Medical Specialists Pc — 7 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 patients483
Services billed 585 a service is one billed item, such as a visit, a test or a procedure
Average patient age80

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.

Colleagues at Advanced Care Medical Specialists PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Munster