DR. THOMAS MARTIN COWAN MD
NPI 1558655423
Hospitalist in Columbus, OH
About Dr. Thomas Martin Cowan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. THOMAS MARTIN COWAN MD (NPI 1558655423) is an individual hospitalist provider in Columbus, Ohio, licensed in Ohio (35.130906) and active in the NPI registry since June 2011. He is enrolled in Medicare PECOS, is affiliated with Riverside Methodist Hospital, and is a graduate of Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University (2011).
NPPES Registry Identity
Specialties & Licenses 2
Accepted 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
Dr. Thomas Martin Cowan 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.
Medicare Billing Reassignments
2Medicare enrollment records show Thomas Cowan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Columbus, OH 43214
- Reassigned Medicare billing, Ohio enrollment
- 3,314 clinicians in this Medicare group
Westerville, OH 43082
- Reassigned Medicare billing, Ohio enrollment
- 675 clinicians in this Medicare group
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
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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Riverside Methodist Hospital
Acute Care Hospitals · Columbus, OHMount Carmel St Ann's
Acute Care Hospitals · Westerville, OHMount Carmel East & West
Acute Care Hospitals · Columbus, OHMount Carmel New Albany Surgical Hospital
Acute Care Hospitals · New Albany, OHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 43214 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
COLUMBUS, OH 43214
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 Thomas Cowan's NPI number?
The NPI number for Thomas Cowan is 1558655423. It was assigned to this individual provider in the NPPES registry on June 8, 2011.
Where is Thomas Cowan located?
Thomas Cowan practices at 3555 Olentangy River Rd Ste 1080, Columbus, OH 43214. The listed phone number is (614) 268-8164.
What is Thomas Cowan's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Thomas Cowan enrolled in Medicare?
Yes. Thomas Cowan 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 Thomas Cowan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Cowan reassigns Medicare benefits to 2 organizations: Ohiohealth Corporation (Columbus, OH) and Central Ohio Primary Care Physicians, Inc. (Westerville, 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 Thomas Cowan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Thomas Cowan accept?
Health plans from Antidote Health Plan of Ohio, Inc. and CareSource list Thomas Cowan 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 Thomas Cowan affiliated with any hospitals?
According to CMS data, Thomas Cowan is affiliated with Riverside Methodist Hospital, Mount Carmel St Ann's, Mount Carmel East & West and Mount Carmel New Albany Surgical Hospital.
When was this NPI record last updated?
The NPPES record for Thomas Cowan was last updated on August 21, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.
# Dr. Thomas Martin Cowan, MD · NPI 1558655423
Hospitalist physician in Columbus, Ohio. Individual provider, active in the CMS NPPES registry since June 8, 2011.
## Identity
- **NPI:** 1558655423 (Entity type: Individual)
- **Enumerated:** June 8, 2011
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 35.130906 (Ohio)
- **Sole proprietor:** No
## Practice location
- **Address:** 3555 OLENTANGY RIVER RD STE 1080, Columbus, OH 43214-3984
- **Phone:** (614) 268-8164 · **Fax:** (614) 268-8406
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Ohiohealth Corporation (NPI 1578545273, Columbus, OH); Central Ohio Primary Care Physicians, Inc. (NPI 1194705194, Westerville, OH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University, class of 2011
## Record status
- **NPPES last updated:** August 21, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1558655423) · Data from the CMS NPPES public registry.