DR. JOHN DELMAR SIDDENS D.O.
NPI 1407826993
Ophthalmology in Greenville, SC
About Dr. John Delmar Siddens D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN DELMAR SIDDENS D.O. (NPI 1407826993) is an individual ophthalmology provider in Greenville, South Carolina, licensed in South Carolina (291) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Prisma Health Greenville Memorial Hospital, and maintains a secondary practice location in Greenville.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 4
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 Delmar Siddens D.o. 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 Reassignment
Medicare enrollment records show John Siddens reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Greenville, SC 29605
- Reassigned Medicare billing, South Carolina enrollment
- 3,281 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 12
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Prisma Health Greenville Memorial Hospital
Acute Care Hospitals · Greenville, SCPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 29605 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Siddens's NPI number?
The NPI number for John Siddens is 1407826993. It was assigned to this individual provider in the NPPES registry on January 25, 2006.
Where is John Siddens located?
John Siddens practices at 104 Simpson Street, Greenville, SC 29605. The listed phone number is (864) 522-3900.
What is John Siddens's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is John Siddens enrolled in Medicare?
Yes. John Siddens 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 organization bills Medicare for John Siddens's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Siddens reassigns Medicare benefits to Prisma Health University Medical Group (Greenville, SC). The 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 Siddens's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Siddens accept?
Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of North Carolina, Anthem Blue Cross and Blue Shield and Blue Cross and Blue Shield of Montana and 12 other insurers list John Siddens 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 Siddens affiliated with any hospitals?
According to CMS data, John Siddens is affiliated with Prisma Health Greenville Memorial Hospital.
When was this NPI record last updated?
The NPPES record for John Siddens was last updated on May 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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 Delmar Siddens, D.O. · NPI 1407826993
Ophthalmology physician in Greenville, South Carolina. Individual provider, active in the CMS NPPES registry since January 25, 2006.
## Identity
- **NPI:** 1407826993 (Entity type: Individual)
- **Enumerated:** January 25, 2006
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 291 (South Carolina)
- **Sole proprietor:** No
## Practice location
- **Address:** 104 SIMPSON STREET, Greenville, SC 29605-3593
- **Phone:** (864) 522-3900 · **Fax:** (864) 522-3909
## 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:** Prisma Health University Medical Group (NPI 1730850322, Greenville, SC), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Nova Southeastern College Of Osteo Medicine, class of 1986
## Record status
- **NPPES last updated:** May 12, 2021
- **Other identifiers:** Other 4232647 (SC); Other 2556148003 (SC); Other 180018447 (SC); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1407826993) · Data from the CMS NPPES public registry.