John Siddens, D.O.
NPI 1407826993 · Ophthalmology Physician · Greenville, SC
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Siddens, D.O. is a Ophthalmology Physician provider in Greenville, SC (NPI 1407826993).
Provider details
- NPI number
- 1407826993
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 291 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
810 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Problem Focused Exam of Visual System92012 | 182 | $82 |
| New Patient Problem Focused Exam of Visual System92002 | 170 | $77 |
| Photography of Content of Eyes92285 | 125 | $21 |
| Injection of Chemical for Paralysis of Nerve Muscles on Side of Face64612 | 95 | $177 |
| Exam of Visual Field With Limited Testing92081 | 80 | $31 |
| Repair of Tendon of Upper Eyelid67904 | 57 | $771 |
| Removal of Excessive Skin and Fat of Upper Eyelid |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 45 | 37 |
| Erythromycin Basebrand: Erythromycin | 19 | — |
| Methylprednisolone | 17 | 17 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 200 Patewood DrSuite B480Greenville, SC 29615-3593Phone: (864) 454-4570
Registry dates
- Enumerated
- 2006-01-25
- Last updated
- 2021-05-12
- Certified
- 2021-05-12
Frequently asked questions
- What is John Siddens's NPI number?
- John Siddens's National Provider Identifier (NPI) is 1407826993, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Siddens's specialty?
- John Siddens is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Siddens located?
- John Siddens's practice location on file with NPPES is 104 Simpson Street, Greenville, SC 29605-3593.
- What is John Siddens's phone number?
- The practice phone number listed in the NPPES registry for John Siddens is (864) 522-3900.
- Does John Siddens accept Medicare?
- John Siddens is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Siddens's NPI active?
- Yes — John Siddens's NPI (1407826993) is active in the NPPES registry as of the last update on 2021-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.