DR. JOHN NICHOLAS HARKER DO
NPI 1013026269
Orthopaedic Surgery in Largo, FL
About Dr. John Nicholas Harker Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN NICHOLAS HARKER DO (NPI 1013026269) is an individual orthopaedic surgery provider in Largo, Florida, licensed in Florida (OS-0006819) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Mease Dunedin Hospital, and maintains a secondary practice location in Apple Valley.
NPPES Registry Identity
Specialties & Licenses
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. John Nicholas Harker 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
2Medicare enrollment records show John Harker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Clearwater, FL 33765
- Reassigned Medicare billing, Florida enrollment
Apple Valley, CA 92307
- Reassigned Medicare billing, California enrollment
- 19 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 9
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mease Dunedin Hospital
Acute Care Hospitals · Dunedin, FLHca Florida Largo Hospital
Acute Care Hospitals · Largo, FLPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 33778 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 3
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 5
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 John Harker's NPI number?
The NPI number for John Harker is 1013026269. It was assigned to this individual provider in the NPPES registry on August 30, 2006.
Where is John Harker located?
John Harker practices at 12955 Seminole Blvd, Largo, FL 33778. The listed phone number is (727) 586-4752.
What is John Harker's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is John Harker enrolled in Medicare?
Yes. John Harker 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 John Harker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Harker reassigns Medicare benefits to 2 organizations: Clearwater Orthopedic & Sports Medicine Inc (Clearwater, FL) and Paul J Wisniewski Do Inc (Apple Valley, CA). 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 John Harker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Harker accept?
Health plans from AvMed, Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company) and WellSense Health Plan list John Harker 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 John Harker affiliated with any hospitals?
According to CMS data, John Harker is affiliated with Mease Dunedin Hospital and Hca Florida Largo Hospital.
When was this NPI record last updated?
The NPPES record for John Harker was last updated on September 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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. John Nicholas Harker, DO · NPI 1013026269
Orthopaedic Surgery physician in Largo, Florida. Individual provider, active in the CMS NPPES registry since August 30, 2006.
## Identity
- **NPI:** 1013026269 (Entity type: Individual)
- **Enumerated:** August 30, 2006
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** OS-0006819 (Florida)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 12955 SEMINOLE BLVD, Largo, FL 33778-2399
- **Phone:** (727) 586-4752
## 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): Clearwater Orthopedic & Sports Medicine Inc (NPI 1306041421, Clearwater, FL); Paul J Wisniewski Do Inc (NPI 1780433698, Apple Valley, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Nova Southeastern College Of Osteo Medicine, class of 1989
## Record status
- **NPPES last updated:** September 12, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1013026269) · Data from the CMS NPPES public registry.