DR. JOHN MARK KOESTER (D.O.) – Emergency Medicine Physician, NPI 1811978646

Emergency Medicine Physician

DR. JOHN MARK KOESTER (D.O.) is a healthcare provider. based in Ankeny, Iowa. specializing in Emergency Medicine Physician. They hold the professional credentials D.O.. They hold a License No. 02137 (IA). The NPI Number for DR. JOHN MARK KOESTER (D.O.) is 1811978646

Main info

Male

Name

DR. JOHN MARK KOESTER (D.O.)

NPI

1811978646

Phone

(515) 965-3632

Address

3497 NE 78TH AVE

Enumeration Date

9 November 2005

Last Update Date

26 May 2020

Data current as of

19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology

Experience64

Completeness75

Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for DR. JOHN MARK KOESTER (D.O.)

3497, Northeast 78th Avenue, Ankeny, Polk County, Iowa, 50021, United States
ANKENY, IA 500219377
Phone: (515) 965-3632
Fax: (515) 965-3634
Type: Mailing
Iowa Methodist Medical Center, 1200, Pleasant Street, Sherman Hill, Des Moines, Polk County, Iowa, 50309, United States
DES MOINES, IA 503091406
Phone: (515) 241-6212
Type: Location
3600 30th St
Des Moines, IA 503105876
Phone: (515) 699-5999
Fax: (515) 699-5912
Type: Location

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

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Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

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Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 50021)

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Reviews

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Frequently asked questions

What number should I use to identify DR. JOHN MARK KOESTER (D.O.) for billing?

Administrative and clinical systems typically use NPI 1811978646 for DR. JOHN MARK KOESTER (D.O.).

Is DR. JOHN MARK KOESTER (D.O.)'s NPI status active today?

Active status means DR. JOHN MARK KOESTER (D.O.)'s NPI record is not deactivated in the public file.

What services align with DR. JOHN MARK KOESTER (D.O.)'s listing?

DR. JOHN MARK KOESTER (D.O.)'s public classification highlights Emergency Medicine Physician. Clinical services aligned with this taxonomy classification.

What geographic area is tied to DR. JOHN MARK KOESTER (D.O.)?

DR. JOHN MARK KOESTER (D.O.) is associated with Ankeny, Iowa in the same public data insurers reference.

Who maintains DR. JOHN MARK KOESTER (D.O.)'s record?

Providers certify NPPES data; CMS hosts the public file you are viewing.