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DR. WILLIAM E. KERGOSIEN M.D.
NPI 1730109018
Family Medicine in Bay St Louis, MS

Active since July 20, 2006PECOS Enrolled
109 CARROLL AVE, BAY ST LOUIS, MS 39520(228) 467-6733 Get Directions Write a Review

NPPES record last updated: January 7, 2013. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. William E. Kergosien M.d. NPPES

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

DR. WILLIAM E. KERGOSIEN M.D. (NPI 1730109018) is an individual family medicine provider in Bay St Louis, Mississippi, licensed in Mississippi (12138) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1730109018
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. WILLIAM E. KERGOSIENCredential: M.D.
Location Address109 CARROLL AVEBay St Louis, MS 39520-4503
Mailing Address109 Carroll AveBay St Louis, MS 39520-4503 · (228) 467-6733
Phone(228) 467-6733
Sole ProprietorYes
Enumeration DateJuly 20, 2006
Last NPPES UpdateJanuary 7, 2013
✔ NPI 1730109018 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in MS · 12138
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
109 CARROLL AVE, Bay St Louis, MS 39520
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Other Identifiers 4

Medicare UPINB23905MS
Medicare ID-Type Unspecified80E274MS
Medicare PIN302I931994MS
Medicaid00019189MS

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, 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 (PECOS)

Dr. William E. Kergosien M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

15

Medicare enrollment records show William Kergosien reassigns Medicare billing to 15 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hancock Emergency Group LLC
1.8 mi
Emergency Medicine
149 DRINKWATER RD
Bay St Louis, MS 39520
  • Reassigned Medicare billing, Mississippi enrollment
  • 87 clinicians in this Medicare group
NPI 1295142396 (800) 893-9698
Forrest County General Hospital
25 mi
Rural Health
1702 HIGHWAY 11 N STE A
Picayune, MS 39466
  • Reassigned Medicare billing, Mississippi enrollment
  • 248 clinicians in this Medicare group
NPI 1790361509 (601) 799-3130
Rh Emergency Medicine Of Highland Community LLC
38 mi
Emergency Medicine
130 HIGHLAND PKWY
Picayune, MS 39466
  • Reassigned Medicare billing, Mississippi enrollment
  • 78 clinicians in this Medicare group
NPI 1033987946 (601) 358-9400
Washington Parish Emergency Physicians Group LLC
46 mi
Emergency Medicine
433 PLAZA ST
Bogalusa, LA 70427
  • Reassigned Medicare billing, Louisiana enrollment
  • 91 clinicians in this Medicare group
NPI 1538511043 (877) 485-4474
St. Bernard Emergency Group, LLC
47 mi
Emergency Medicine
8000 W JUDGE PEREZ DR
Chalmette, LA 70043
  • Reassigned Medicare billing, Louisiana enrollment
  • 82 clinicians in this Medicare group
NPI 1306386685 (504) 826-9500
Rh Emergency Medicine Of Marion General LLC
71 mi
Emergency Medicine
1560 SUMRALL RD
Columbia, MS 39429
  • Reassigned Medicare billing, Mississippi enrollment
  • 81 clinicians in this Medicare group
NPI 1841064110 (601) 736-6303
Rh Emergency Medicine Of Walthall General LLC
74 mi
Emergency Medicine
100 HOSPITAL DR
Tylertown, MS 39667
  • Reassigned Medicare billing, Mississippi enrollment
  • 61 clinicians in this Medicare group
NPI 1336901511 (601) 876-2122
Rh Hospitalist Medicine Of Walthall General LLC
74 mi
Hospitalist
100 HOSPITAL DR
Tylertown, MS 39667
  • Reassigned Medicare billing, Mississippi enrollment
  • 62 clinicians in this Medicare group
NPI 1053173237 (601) 876-2122
Rh Emergency Medicine Of Jefferson Davis LLC
94 mi
Emergency Medicine
1102 ROSE ST
Prentiss, MS 39474
  • Reassigned Medicare billing, Mississippi enrollment
  • 58 clinicians in this Medicare group
NPI 1356103527 (601) 792-4276
Rh Hospitalist Medicine Of Jefferson Davis LLC
94 mi
Hospitalist
1102 ROSE ST
Prentiss, MS 39474
  • Reassigned Medicare billing, Mississippi enrollment
  • 58 clinicians in this Medicare group
NPI 1174385355 (601) 792-4276

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
153 services149 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
134 services129 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
34 services33 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
33 services33 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
22 services22 patients

Physician 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.

New Patient
$80.50 typical visit price
range $51.65 – $159.18
Typical copayment $20.12 (range $12.91 – $39.79)
Most-billed visit code 99203
Established Patient
$92.20 typical visit price
range $16.15 – $129.61
Typical copayment $23.05 (range $4.03 – $32.40)
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.

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 William Kergosien's NPI number?

The NPI number for William Kergosien is 1730109018. It was assigned to this individual provider in the NPPES registry on July 20, 2006.

Where is William Kergosien located?

William Kergosien practices at 109 Carroll Ave, Bay St Louis, MS 39520. The listed phone number is (228) 467-6733.

What is William Kergosien's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is William Kergosien enrolled in Medicare?

Yes. William Kergosien is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Kergosien's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Kergosien reassigns Medicare benefits to 15 organizations: Hancock Emergency Group LLC (Bay St Louis, MS), Forrest County General Hospital (Picayune, MS), Rh Emergency Medicine Of Highland Community LLC (Picayune, MS), Washington Parish Emergency Physicians Group LLC (Bogalusa, LA), St. Bernard Emergency Group, LLC (Chalmette, LA) and 10 more organizations, listed in the Medicare section above. 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 William Kergosien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Kergosien accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 2 other insurers list William Kergosien 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.

When was this NPI record last updated?

The NPPES record for William Kergosien was last updated on January 7, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.