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

Individual provider Acute Care Nurse Practitioner · NPI 1770723082

Mr. Michael Louis Havenar, ACNP is a Nurse Practitioner in Saint Louis, Missouri. Qualified in 2008, 18 years ago. Practices with Washington University, a 2,986-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Missouri.

Years since qualifying
18
Licensed in
MO
In the registry since
2009
What do these letters mean?
ACNP — Acute Care Nurse Practitioner
A nurse practitioner who treats acutely ill patients, usually in hospital.

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Practice location Address checks out

11133 Dunn Rd Dept Anesthesiology
Saint Louis, MO 63136-6163
Phone: (800) 862-9980
Fax: (314) 362-1185
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Acute Care Nurse Practitioner (primary) Taxonomy 363LA2100X · Licence 2003001555 (MO)

Record details

NPI number1770723082
Entity typeIndividual (Type 1)
GenderMale
Credentials ACNP
Sole proprietorNo
NPI enumeratedFebruary 26, 2009
Last updated in NPPESApril 17, 2025

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Washington University — 2986 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 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 patients66
Services billed 152 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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 Washington University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2986 clinicians in the practice; 12 are shown here.

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