Physician Profile
Unclaimed ProfileAbout HARKER
Based in Largo, FL, John Nicholas Harker, DO is listed in the NPI registry under orthopedic surgery. John graduated from Nova Southeastern College of Osteo Medicine in 1989. John is also listed as specializing in orthopaedic surgery. Medicare claims data shows John provided 472 services to 316 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (727) 586-4752
- Email not available
Practice Locations
12955 SEMINOLE BLVD
Largo, FL 33778
Procedures Most Often Billed to Medicare
472 services · 316 patients · 9 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
78 |
| Injection, dexamethasone sodium phosphate, 1 mg | Drug given | J1100 |
68 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
176 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
38 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
31 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
30 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
23 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
16 |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
12 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other orthopedic surgeons in Largo 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Nova Southeastern College of Osteo Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1989 at Nova Southeastern College of Osteo Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Aspiration and/or injection of fluid from large joint 8
Providers in FL who bill this service to Medicare most often.
Common questions
What is Dr. Harker's specialty?
Dr. Harker is an orthopedic surgeon in Largo, FL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “ORTHOPEDIC SURGERY”.
NPI registry
Where can I find Dr. Harker?
Dr. Harker is listed at 12955 SEMINOLE BLVD, Largo, FL 33778. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Harker?
The number on file is (727) 586-4752. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Harker?
Dr. Harker's National Provider Identifier is 1013026269. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Harker's medical education?
Dr. Harker attended Nova Southeastern College of Osteo Medicine, graduating in 1989. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Harker have?
Dr. Harker has 37 years experience. Calculated from a graduation year of 1989, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Harker known for?
According to Medicare billing data, Dr. Harker performs procedures including aspiration and/or injection of fluid from large joint, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Harker's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Harker. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.