Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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John Anthon Haak, CRNA, ARNP

Individual provider Certified Registered Nurse Anesthetist · NPI 1437313715

John Anthon Haak, CRNA, ARNP is a Certified Registered Nurse Anesthetist (CRNA) in Spencer, Iowa. Qualified in 2007, 19 years ago. Practices with Northwest Iowa Anesthesia Associates, a 10-clinician group and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
19
Licensed in
IA
In the registry since
2008
What do these letters mean?
CRNA — Certified Registered Nurse Anesthetist
An advanced practice nurse who administers anaesthesia.
ARNP — Advanced Registered Nurse Practitioner
The title some states use for an advanced practice nurse.

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Practice location Address checks out

1200 1st Ave E
Spencer, IA 51301-4342
Phone: (712) 264-6164
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence D-112804 (IA)

Record details

NPI number1437313715
Entity typeIndividual (Type 1)
GenderMale
Credentials CRNA , ARNP
Sole proprietorNo
NPI enumeratedJuly 15, 2008
Last updated in NPPESApril 6, 2010

Medicare enrollment

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

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Northwest Iowa Anesthesia Associates — 10 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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