IRENE K KOSKAN M.D.
NPI 1831197862
Internal Medicine in Bay St Louis, MS
About Irene K Koskan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
IRENE K KOSKAN M.D. (NPI 1831197862) is an individual internal medicine provider in Bay St Louis, Mississippi, licensed in Mississippi (09338) and active in the NPI registry since July 2005. She is enrolled in Medicare PECOS, is affiliated with Merit Health Biloxi, and is a graduate of Other (1977).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
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
Irene K Koskan M.d. 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 Reassignment
Medicare enrollment records show Irene Koskan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bay St Louis, MS 39520
- Reassigned Medicare billing, Mississippi enrollment
- 731 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 8
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.
Merit Health Biloxi
Acute Care Hospitals · Biloxi, MSMemorial Hospital At Gulfport
Acute Care Hospitals · Gulfport, MSSinging River Gulfport
Acute Care Hospitals · Gulfport, MSOchsner Medical Center-Hancock
Acute Care Hospitals · Bay Saint Louis, MSPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 39520 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 17
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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Irene Koskan's NPI number?
The NPI number for Irene Koskan is 1831197862. It was assigned to this individual provider in the NPPES registry on July 13, 2005.
Where is Irene Koskan located?
Irene Koskan practices at 835 Thames Ave, Bay St Louis, MS 39520. The listed phone number is (228) 466-4977.
What is Irene Koskan's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Irene Koskan enrolled in Medicare?
Yes. Irene Koskan 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 organization bills Medicare for Irene Koskan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Irene Koskan reassigns Medicare benefits to Memorial Hospital At Gulfport (Bay St Louis, MS). The 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 Irene Koskan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Irene Koskan accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 4 other insurers list Irene Koskan 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 Irene Koskan affiliated with any hospitals?
According to CMS data, Irene Koskan is affiliated with Merit Health Biloxi, Memorial Hospital At Gulfport, Singing River Gulfport and Ochsner Medical Center-Hancock.
When was this NPI record last updated?
The NPPES record for Irene Koskan was last updated on July 10, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Irene K Koskan, M.D. · NPI 1831197862
Internal Medicine physician in Bay St Louis, Mississippi. Individual provider, active in the CMS NPPES registry since July 13, 2005.
## Identity
- **NPI:** 1831197862 (Entity type: Individual)
- **Enumerated:** July 13, 2005
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 09338 (Mississippi)
- **Sole proprietor:** No
## Practice location
- **Address:** 835 THAMES AVE, Bay St Louis, MS 39520-5005
- **Phone:** (228) 466-4977 · **Fax:** (228) 463-0827
## 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:** Memorial Hospital At Gulfport (NPI 1518394089, Bay St Louis, MS), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1977
## Record status
- **NPPES last updated:** July 10, 2014
- **Other identifiers:** Other $$$$$$$$$C (MS); Medicare UPIN C48472 (MS); Medicare PIN 110001989 (MS); and 2 more
---
Source: [NPI Profile](https://npiprofile.com/npi/1831197862) · Data from the CMS NPPES public registry.