Dr. John Nicholas Harker, DO
- Medicare services, 2024
- 472
- Medicare patients, 2024
- 177
- Part D claims, 2024
- 339
- Publications
- 6
- Hospital affiliations
- 2
- Practice address
- 701 N Hercules Ave Ste A, Clearwater, FL 33765-2029
- Practice phone
- Call (727) 562-9317
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Clearwater Orthopedic & Sports Medicine
Physician office · Clearwater, Florida
Find Dr. Harker's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John Nicholas Harker is an orthopedic surgeon in Clearwater, Florida
Dr. Harker practices at Clearwater Orthopedic & Sports Medicine in Clearwater, Florida.
Dr. Harker's NPI, 1013026269, was assigned on August 30, 2006. Dr. Harker graduated from Dr. Kiran C. Patel College of Osteopathic Medicine in 1989. Dr. Harker holds Florida license OS-0006819.
- NPI
- 1013026269NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8729043112
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (727) 562-9317
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Nicholas Harker practices at Clearwater Orthopedic & Sports Medicine in Clearwater, Florida
Dr. Harker's primary practice is Clearwater Orthopedic & Sports Medicine, at 701 N Hercules Ave Ste A, Clearwater, FL 33765-2029. The practice phone is (727) 562-9317.
- Clearwater Orthopedic & Sports Medicine701 N Hercules Ave Ste A, Clearwater, FL 33765-2029Phone(727) 562-9317
Source: Dmand AI Affiliation Data
Dr. John Nicholas Harker is affiliated with 5 sites of care and 1 medical group
Dr. Harker's primary practice is Clearwater Orthopedic & Sports Medicine in Clearwater, Florida. Dr. Harker is also affiliated with HCA Florida Largo Hospital. The medical group on file is Cutting Edge Surgical Medical Group. Dmand AI also links Dr. Harker to 1 more hospital, 1 group practice or clinic and 1 home health agency, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Nicholas Harker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Harker practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Clearwater Orthopedic & Sports Medicine | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Nicholas Harker is one of 1,248 orthopedic surgeons in Florida
Orthopaedic surgery is Dr. Harker's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Harker is board certified in orthopedic surgery by the AOA Board of Orthopedic Surgery. Dr. Harker is licensed in Florida.
Specialties and state licenses
- Orthopaedic surgery, FloridaPrimary
Clinical focus
Dmand AI lists amputation, arthritis, broken or dislocated ankle/ or foot, bursitis, carpal tunnel syndrome, enthesopathy in arms, fluid in a joint and hand joint or tendon inflammation among the conditions Dr. Harker treats.
Orthopedic surgeons near Dr. Harker
Counts of orthopedic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Nicholas Harker billed Medicare for 472 services in 2024
CMS data shows 472 Medicare services from Dr. Harker across 9 procedure codes in 2024, for 177 Medicare patients. Medicare paid $27,228 for them.
Dr. Harker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3722024: 32612%
- Surgery
- 2023: 1062024: 7826%
- Drugs given in the office
- 2023: 722024: 686%
Where Dr. Harker's Medicare services took place, 2024
- In an office42590%
- In a facility4710%
Dr. Harker compared with the Florida median for orthopedic surgeons, 2024
- Dr. Harker
- Florida median
- Medicare services
- 472vs 1,34565% below
- Medicare patients
- 177vs 29039% below
- Part D claims
- 248vs 17641% above
Medians across 1,164 orthopedic surgeons in Florida with Dmand AI profiles that report each measure.
Dr. Harker's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Harker?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Harker and other orthopedic surgeons in Florida.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Nicholas Harker treated 177 Medicare patients in 2024, average age 77
CMS counts 177 Medicare patients who saw Dr. Harker in 2024. The largest group is 75 to 84, with 66 patients. 75% of them have arthritis, and 75% have high blood pressure. 18% are also on Medicaid. Their average risk score is 1.78, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Harker's median patient age at 68, with 56% women.
Dr. Harker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Harker's Medicare patients by sex, 2024
- Women11163%
- Men6637%
Chronic conditions among Dr. Harker's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease41%
- Mood disorders41%
- Anxiety40%
- Chronic kidney disease39%
- Depression37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Harker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Nicholas Harker wrote 339 Medicare Part D claims in 2024
In 2024, Dr. Harker wrote 339 Medicare Part D claims for 151 patients. 99% of them were for generic drugs. CMS names the drug for 248 of them, across 7 drugs with 11 or more claims each, at $2,017 in total drug cost. In 2023, CMS named 287 claims across 7 drugs.
Dr. Harker's Part D claims by kind of drug, 2024
- Generic336 claims99%
- Brand-name and other3 claims1%
Dr. Harker's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Harker's Part D claims, 2024
- Opioids42%142 of 339 claims
- Antibiotics12%41 of 339 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2872024: 24814%
Drugs named by CMS: 7 in 2024, 7 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. John Nicholas Harker takes part in Medicare
Dr. Harker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Hip replacement: 1 to 10 procedures (CMS shows small counts as a range)
Knee replacement: 1 to 10 procedures (CMS shows small counts as a range)
Lower limb (leg) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Upper limb (arm) arthroscopy (minimally invasive joint repair): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John Nicholas Harker has 6 publications on record
Dmand AI links 6 papers to Dr. Harker, published from 2020 to 2023. 2023 was the busiest year, with 3. Dr. Harker has published most often in Cureus. Dr. Harker's most frequent co-authors are Mohit Bansal, MD, Andrew Boltuch, DO and Ryan Mitchell Brink, DO.
Dr. Harker's papers by year, 2020 to 2023
Dr. Harker's most frequent co-authors
Recent publications by Dr. Harker
JBJS Case Connect
See who Dr. Harker researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Harker works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Nicholas Harker received $31,548 in industry payments from 2016 to 2025
CMS Open Payments shows 385 general payments to Dr. Harker from 37 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 74% of the total. Stryker Corporation paid the most, $16,644.
General payments to Dr. Harker by program year, 2016 to 2025
General payments to Dr. Harker by kind, 2016 to 2025
- Food and beverage$23,24874%
- Travel and lodging$7,38823%
- Device or supply loans$5362%
- Education$2111%
- Other$1661%
Companies that paid Dr. Harker the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Nicholas Harker serves on 1 committee
Dr. Harker serves on Board of Trustees Largo Medical Center.
Dr. Harker's committees and leadership roles
- Board of Trustees Largo Medical CenterMember
- 2018 to present
Source: Dmand AI Professional Profile Data
Dr. John Nicholas Harker graduated from Dr. Kiran C. Patel College of Osteopathic Medicine
Dr. Harker graduated from Dr. Kiran C. Patel College of Osteopathic Medicine in 1989. Dr. Harker is a member of AOA.
- Medical school
- Board certified in orthopedic surgery
- Board certified in 2025 - 2027
- Board certified in 1994 - 2026
Source: Dmand AI Professional Profile Data
Dr. John Nicholas Harker accepts plans from 11 insurance carriers
Dr. Harker is in network with 11 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. HMO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Excellus BlueCross BlueShield
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Cigna
- Aspirus Health Plan
- Blue Cross and Blue Shield of Kansas City
- +3 more carriersWith a free account
Plan types Dr. Harker accepts, by number of carriers
- HMO7
- PPO7
- Medicare6
- POS6
- EPO4
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Nicholas Harker's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Nicholas Harker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John Nicholas Harker's NPI number?
Dr. John Nicholas Harker's NPI number is 1013026269. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Nicholas Harker?
Dr. John Nicholas Harker is an orthopedic surgeon in Clearwater, Florida. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. John Nicholas Harker practice?
Dr. Harker practices at 701 N Hercules Ave Ste A, Clearwater, FL 33765-2029. Dr. Harker's primary practice is Clearwater Orthopedic & Sports Medicine in Clearwater, Florida. Dmand AI also links Dr. Harker to 1 hospital, 1 group practice or clinic and 1 home health agency.
What is Dr. John Nicholas Harker's office phone number?
The practice phone on file for Dr. Harker is (727) 562-9317.
What is Dr. John Nicholas Harker's medical license number?
Dr. Harker holds Florida license OS-0006819.
Which hospitals is Dr. John Nicholas Harker affiliated with?
Dr. Harker is affiliated with HCA Florida Largo Hospital. Dmand AI links Dr. Harker to 1 more hospital.
What medical group is Dr. John Nicholas Harker part of?
Dr. Harker is linked to Cutting Edge Surgical Medical Group.
Does Dr. John Nicholas Harker accept Medicare?
Yes. CMS data shows Dr. Harker billed Medicare for 472 services in 2024, and Dr. Harker accepts Medicare assignment.
How many Medicare patients does Dr. John Nicholas Harker see?
CMS counts 177 Medicare patients who saw Dr. Harker in 2024, with an average age of 77.
Is Dr. John Nicholas Harker board certified?
Yes. Dr. Harker is board certified in orthopedic surgery by the AOA Board of Orthopedic Surgery.
Show 8 more questionsShow fewer questions
What services does Dr. John Nicholas Harker bill to Medicare?
In 2024, Dr. Harker's most billed Medicare services were office visit, established patient (99213), surgery: bones and joints (20610) and injected or infused drug (J1100).
Where did Dr. John Nicholas Harker go to medical school?
Dr. Harker graduated from Dr. Kiran C. Patel College of Osteopathic Medicine in 1989.
What drugs does Dr. John Nicholas Harker prescribe most?
In 2024 Medicare Part D data, Dr. Harker's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Methylprednisolone and Oxycodone-Acetaminophen.
Has Dr. John Nicholas Harker received payments from drug or device companies?
CMS Open Payments shows $31,548 in general payments to Dr. Harker from 37 companies from 2016 to 2025. The largest total came from Stryker Corporation.
How long has Dr. John Nicholas Harker been practicing?
Dr. Harker graduated from medical school in 1989, 37 years ago.
Does Dr. John Nicholas Harker do research?
Dmand AI links 6 publications to Dr. Harker, published from 2020 to 2023.
Who does Dr. John Nicholas Harker publish with?
Dr. Harker's most frequent co-authors are Mohit Bansal, MD (1 shared paper), Andrew Boltuch, DO (1 shared paper) and Ryan Mitchell Brink, DO (1 shared paper).
What insurance does Dr. John Nicholas Harker accept?
Dr. Harker is in network with 11 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. HMO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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