John Nicholas Harker, DO
Orthopaedic Surgery Physician · Largo, FL
John Nicholas Harker, DO is an orthopaedic surgery physician with a practice address in Largo, Florida, and NPI 1013026269, issued on Aug 30, 2006. Check the license (Florida OS-0006819, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- John Nicholas Harker
- Credential
- DO
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- OS-0006819 FL
20A23999 CA
Self-reported in NPPES; status is on the state search - Practice location
- 12955 Seminole Blvd, Largo, FL 33778
- Phone
- (727) 586-4752
- Enumerated
- Aug 30, 2006
- Record last updated
- Sep 12, 2025
- Medicare enrollment
- Enrolled (PECOS I20260414001514); accepts Medicare assignment
- Medical or professional school
- Nova Southeastern College Of Osteo Medicine, 1989
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 1,470 in Florida → Look up another NPI →
Also registered at 12955 Seminole Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Fansler, MDSurgery Physician1528172939
- Mariel Silva Musalem, M.D.Pediatrics Physician1548453954
Verify John Nicholas Harker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license OS-0006819Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
339 Medicare Part D claims for 151 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. 142 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen73 claims
- Methylprednisolone52 claims
- Oxycodone-Acetaminophen48 claims
- Meloxicam23 claims
- Ibuprofen19 claims
- Tramadol Hcl18 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,123.21
38 payments; by number, the most common kind was food and beverage; the largest payer was Stryker Corporation. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Paul J Wisniewski DO IncApple Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Nicholas Harker among 1,470 orthopaedic surgery physician records in Florida
John Nicholas Harker, DO is one of 1,470 orthopaedic surgery physician records with a practice address in Florida. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 19% of them.
- NPI issued2006 · 19% of these records are older, 45% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1989 · median 2002 among the 974 with a school on file
- Record last updated2025 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Florida
There are 1,470 orthopaedic surgery physician records in Florida.
All 1,470 in Florida → Every provider in Largo → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Brian Burke, M.D.Largo, FL 337771225023989
- Steven Page, MDPinellas Park, FL 337811467415596
- Howard Sharf, MEDICAL DOCTORPinellas Park, FL 337811467434167
- Michael Slomka, M.D.Pinellas Park, FL 337811811979636
- Marc Richman, D.O.Largo, FL 337741992051809
- Vladimir Alexander, M.D.Largo, FL 337731417990862
- Robert Lewis, M.D.Largo, FL 337731255369120
- Philip Christ, DOLargo, FL 337711992729214
Common questions
What is John Nicholas Harker, DO's NPI number?
John Nicholas Harker, DO's National Provider Identifier (NPI) is 1013026269, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Nicholas Harker, DO located?
The NPPES record lists a practice address at 12955 Seminole Blvd, Largo, FL, 33778. Phone: (727) 586-4752. Providers update this record themselves, so call before visiting.
How can I verify John Nicholas Harker, DO's license?
NPPES lists Florida license number OS-0006819, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Nicholas Harker, DO prescribe under Medicare Part D?
In 2024, John Nicholas Harker, DO had 339 Medicare Part D claims for 151 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is John Nicholas Harker, DO's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.