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STEPHEN C KOESTERS MD
NPI 1659350783
Internal Medicine in Columbus, OH

Active since January 17, 2006PECOS EnrolledAccepts Medicare Assignment
895 YARD ST, COLUMBUS, OH 43212(614) 293-5123(614) 293-4890 Get Directions Write a Review

NPPES record last updated: March 18, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 18, 2026, Sep 9, 2025, Jan 26, 2021 (3 updates tracked since 2021).

About Stephen C Koesters Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

STEPHEN C KOESTERS MD (NPI 1659350783) is an individual internal medicine provider in Columbus, Ohio, licensed in Ohio (35.077058) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Ohio State University State Health System, and is a graduate of Ohio State University College Of Medicine (1998).

NPPES Registry Identity

NPI1659350783
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameSTEPHEN C KOESTERSCredential: MD
Location Address895 YARD STColumbus, OH 43212-3886
Mailing Address700 Ackerman Rd Ste 2120Columbus, OH 43202-1559 · (614) 293-5123 · Fax (614) 293-4890
Phone(614) 293-5123
Fax(614) 293-4890
Sole ProprietorNo
Medical School CMSOhio State University College Of MedicineGraduated 1998
Enumeration DateJanuary 17, 2006
Last NPPES UpdateMarch 18, 20263 updates tracked since enumeration
NPPES CertifiedMarch 18, 2026
✔ NPI 1659350783 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in OH · 35.077058
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedPediatricsTaxonomy 208000000X · License 35.077058 (OH)
895 YARD ST, Columbus, OH 43212
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Stephen C Koesters Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6507826492
PECOS Enrollment IDI20041014001039
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Stephen Koesters reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Osu Internal Medicine, LLC
1.2 mi
Internal Medicine
410 W 10TH AVE
Columbus, OH 43210
  • Reassigned Medicare billing, Ohio enrollment
  • 1,230 clinicians in this Medicare group
NPI 1740231448 (614) 293-8000
Osu General Internal Medicine LLC
3.3 mi
Internal Medicine
1800 ZOLLINGER RD
Columbus, OH 43221
  • Reassigned Medicare billing, Ohio enrollment
  • 303 clinicians in this Medicare group
NPI 1689919599 (614) 293-5123

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
124 services98 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
57 services57 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
15 services13 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
13 services13 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
12 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Ohio State University State Health System

Acute Care Hospitals · Columbus, OH
4/5 CMS rating
OwnershipGovernment - State
CMS Certification Number360085
Location410 West 10th AvenueColumbus, OH 43210 · Franklin County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 43212 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.12 typical visit price
range $54.34 – $166.65
Typical copayment $31.53 (range $13.58 – $41.66)
Most-billed visit code 99204
Established Patient
$96.44 typical visit price
range $17.10 – $135.40
Typical copayment $24.11 (range $4.27 – $33.85)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
9 suppliers16 claims37 services$6.64 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
1 supplier12 claims12 services$207.14 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 9

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. JENNIFER SABATINO PHARMD, RPH
Pharmacist (Pharmacotherapy)
895 YARD ST
COLUMBUS, OH 43212
Franklin County (614) 293-7980
SEULI M BRILL MD
Internal Medicine
895 YARD ST
GRANDVIEW HEIGHTS, OH 43212
Franklin County (614) 293-5123
PHILIP YOU-HUA CHANG MD
Internal Medicine
895 YARD ST
GRANDVIEW HEIGHTS, OH 43212
Franklin County (614) 293-5123
DR. KATHRYN J TOBIN MD
Internal Medicine
895 YARD ST
GRANDVIEW, OH 43212
Franklin County (614) 293-5123
MRS. ALISON MARIE SOBOWALE LISW
Social Worker (Clinical)
895 YARD ST
GRANDVIEW, OH 43212
Franklin County (614) 293-5123
ARIELA ANISE WAGNER RPH
Pharmacist
895 YARD ST
GRANDVIEW HEIGHTS, OH 43212
Franklin County (614) 293-5123
MR. KASHIF KHAN LISW
Social Worker
895 YARD ST
GRANDVIEW, OH 43212
Franklin County (614) 293-5123
DR. HANNAH ALTHEA STONE MD
Internal Medicine
895 YARD ST
GRANDVIEW, OH 43212
Franklin County (614) 293-5123

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Stephen Koesters's NPI number?

The NPI number for Stephen Koesters is 1659350783. It was assigned to this individual provider in the NPPES registry on January 17, 2006.

Where is Stephen Koesters located?

Stephen Koesters practices at 895 Yard St, Columbus, OH 43212. The listed phone number is (614) 293-5123.

What is Stephen Koesters's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Stephen Koesters enrolled in Medicare?

Yes. Stephen Koesters is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Stephen Koesters's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Koesters reassigns Medicare benefits to 2 organizations: Osu Internal Medicine, LLC (Columbus, OH) and Osu General Internal Medicine LLC (Columbus, OH). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Stephen Koesters's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Stephen Koesters accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and Antidote Health Plan of Ohio, Inc. and 2 other insurers list Stephen Koesters as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Stephen Koesters affiliated with any hospitals?

According to CMS data, Stephen Koesters is affiliated with Ohio State University State Health System.

When was this NPI record last updated?

The NPPES record for Stephen Koesters was last updated on March 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.