DR. WILLIAM JOSEPH SEEMER DO
NPI 1346878956
Family Medicine in Jacksonville, FL
About Dr. William Joseph Seemer Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM JOSEPH SEEMER DO (NPI 1346878956) is an individual family medicine provider in Jacksonville, Florida, licensed in Florida (OS20360) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, is affiliated with Florida Hospital Flagler, and maintains a secondary practice location in Moultrie.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
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. William Joseph Seemer Do 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
4Medicare enrollment records show William Seemer reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Jacksonville, FL 32204
- Reassigned Medicare billing, Florida enrollment
- 492 clinicians in this Medicare group
Orange Park, FL 32073
- Reassigned Medicare billing, Florida enrollment
- 903 clinicians in this Medicare group
Palm Coast, FL 32164
- Reassigned Medicare billing, Florida enrollment
- 300 clinicians in this Medicare group
Panama City, FL 32401
- Reassigned Medicare billing, Florida enrollment
- 281 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 2
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Florida Hospital Flagler
Acute Care Hospitals · Palm Coast, FLHca Florida Memorial Hospital
Acute Care Hospitals · Jacksonville, FLAscension St Vincent's Southside
Acute Care Hospitals · Jacksonville, FLAscension St Vincent's St Johns County
Acute Care Hospitals · St Johns, FLAdventhealth Palm Coast Parkway
Acute Care Hospitals · Palm Coast, FLPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 32216 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
JACKSONVILLE, FL 32216
JACKSONVILLE, FL 32216
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 Seemer's NPI number?
The NPI number for William Seemer is 1346878956. It was assigned to this individual provider in the NPPES registry on March 30, 2020.
Where is William Seemer located?
William Seemer practices at 3625 University Blvd S, Jacksonville, FL 32216. The listed phone number is (904) 702-6111.
What is William Seemer's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is William Seemer enrolled in Medicare?
Yes. William Seemer 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 William Seemer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Seemer reassigns Medicare benefits to 4 organizations: Hni Medical Services Of Florida, LLC (Jacksonville, FL), Inpatient Consultants Of Florida, Inc (Orange Park, FL), Sound Physicians Of Florida IV, LLC (Palm Coast, FL) and Hni Hospital Services Of Florida, LLC (Panama City, FL). 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 Seemer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Seemer accept?
Health plans from Cigna HealthCare of Florida, Inc. and Cigna Healthcare list William Seemer 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 William Seemer affiliated with any hospitals?
According to CMS data, William Seemer is affiliated with Florida Hospital Flagler, Hca Florida Memorial Hospital, Ascension St Vincent's Southside, Ascension St Vincent's St Johns County and Adventhealth Palm Coast Parkway.
When was this NPI record last updated?
The NPPES record for William Seemer was last updated on April 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Dr. William Joseph Seemer, DO · NPI 1346878956
Family Medicine physician in Jacksonville, Florida. Individual provider, active in the CMS NPPES registry since March 30, 2020.
## Identity
- **NPI:** 1346878956 (Entity type: Individual)
- **Enumerated:** March 30, 2020
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** OS20360 (Florida)
- **Sole proprietor:** No
## Practice location
- **Address:** 3625 UNIVERSITY BLVD S, Jacksonville, FL 32216-4207
- **Phone:** (904) 702-6111
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Hni Medical Services Of Florida, LLC (NPI 1679048284, Jacksonville, FL); Inpatient Consultants Of Florida, Inc (NPI 1396795597, Orange Park, FL); Sound Physicians Of Florida IV, LLC (NPI 1740633635, Palm Coast, FL); Hni Hospital Services Of Florida, LLC (NPI 1144851411, Panama City, FL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** April 4, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1346878956) · Data from the CMS NPPES public registry.