Dr. John Delmar Siddens, DO
- Medicare services, 2024
- 10,735
- Medicare patients, 2024
- 387
- Part D claims, 2024
- 176
- Publications
- 2
- Hospital affiliations
- 1
- Practice address
- 104 Simpson St, Greenville, SC 29605
- Practice phone
- Call (864) 454-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Prisma Health University Medical Group
Greenville, South Carolina
Find Dr. Siddens' 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 Delmar Siddens is an ophthalmologist in Greenville, South Carolina
Dr. Siddens practices at Prisma Health University Medical Group in Greenville, South Carolina.
Dr. Siddens' NPI, 1407826993, was assigned on January 25, 2006. Dr. Siddens graduated from Nova Southeastern College of Osteo Medicine in 1986. Dr. Siddens holds South Carolina license 291.
- NPI
- 1407826993NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961394788
- NPI enumeration date
- January 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (864) 454-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Delmar Siddens practices at Prisma Health University Medical Group in Greenville, South Carolina
Dr. Siddens' primary practice is Prisma Health University Medical Group, at 104 Simpson St, Greenville, SC 29605 in Greenville County. The practice phone is (864) 454-2000.
- Prisma Health University Medical Group104 Simpson St, Greenville, SC 29605 · Greenville CountyPhone(864) 454-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Delmar Siddens is affiliated with 3 sites of care and 1 medical group
Dr. Siddens' primary practice is Prisma Health University Medical Group in Greenville, South Carolina. Dr. Siddens is also affiliated with Prisma Health Greenville Memorial Hospital. The medical group on file is Prisma Health Medical Group. Dmand AI also links Dr. Siddens to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Delmar Siddens' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Siddens practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Prisma Health University Medical Group | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Delmar Siddens is one of 269 ophthalmologists in South Carolina
Ophthalmology is Dr. Siddens' primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Siddens is licensed in South Carolina.
Specialties and state licenses
- Ophthalmology, South CarolinaPrimary
Ophthalmologists near Dr. Siddens
Counts of ophthalmologists 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 Delmar Siddens billed Medicare for 10,735 services in 2024
CMS data shows 10,735 Medicare services from Dr. Siddens across 12 procedure codes in 2024, for 387 Medicare patients. Medicare paid $159,226 for them. Every service was in an office.
Dr. Siddens' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 7,2202024: 9,92537%
- Tests and treatments
- 2023: 5992024: 5577%
- Surgery
- 2023: 1472024: 25372%
Dr. Siddens compared with the South Carolina median for ophthalmologists, 2024
- Dr. Siddens
- South Carolina median
- Medicare services
- 10,735vs 2,4464.4 times
- Medicare patients
- 387vs 88156% below
- Part D claims
- 81vs 74889% below
Medians across 277 ophthalmologists in South Carolina with Dmand AI profiles that report each measure.
Dr. Siddens' 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Siddens and other ophthalmologists in South Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Delmar Siddens treated 387 Medicare patients in 2024, average age 74
CMS counts 387 Medicare patients who saw Dr. Siddens in 2024. The largest group is 65 to 74, with 182 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 4% are also on Medicaid. Their average risk score is 1.02, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Siddens' median patient age at 68, with 66% women.
Dr. Siddens' Medicare patients by age, 2024
Dr. Siddens' Medicare patients by sex, 2024
- Women25867%
- Men12933%
Chronic conditions among Dr. Siddens' Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis49%
- Anxiety28%
- Diabetes27%
- Mood disorders27%
- Depression26%
- Chronic kidney disease23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Siddens' 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
- Women66%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Delmar Siddens wrote 176 Medicare Part D claims in 2024
In 2024, Dr. Siddens wrote 176 Medicare Part D claims for 94 patients. 82% of them were for generic drugs. CMS names the drug for 81 of them, across 3 drugs with 11 or more claims each, at $836 in total drug cost. In 2023, CMS named 91 claims across 3 drugs.
Dr. Siddens' Part D claims by kind of drug, 2024
- Generic144 claims82%
- Brand-name32 claims18%
Dr. Siddens' 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. Siddens' Part D claims, 2024
- Opioids11%19 of 176 claims
- Antibiotics17%30 of 176 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: 912024: 8111%
Drugs named by CMS: 3 in 2024, 3 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
Dr. John Delmar Siddens ranks in the 71st percentile for melanoma (skin cancer) excision in Medicare
Dr. Siddens accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 16 procedures of melanoma (skin cancer) excision by Dr. Siddens, more than 71% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Siddens ranks in Medicare procedure volume
- Melanoma (skin cancer) excision
- 71st percentile16 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 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 Delmar Siddens has 2 publications on record
Dmand AI links 2 papers to Dr. Siddens, published from 2020 to 2022. Dr. Siddens has published most often in Am J Ophthalmol Case Rep. Dr. Siddens' most frequent co-author is Mitchell Jay Wolin, MD.
Dr. Siddens' most frequent co-authors
Recent publications by Dr. Siddens
Am J Ophthalmol Case Rep
See who Dr. Siddens researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Siddens works with, so you can find a warm path to the right ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Delmar Siddens received $411 in industry payments from 2016 to 2025
CMS Open Payments shows 23 general payments to Dr. Siddens from 9 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 83% of the total. Mallinckrodt LLC paid the most, $156.
General payments to Dr. Siddens by program year, 2016 to 2025
General payments to Dr. Siddens by kind, 2016 to 2025
- Food and beverage$34083%
- Education$7117%
Companies that paid Dr. Siddens 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 Delmar Siddens graduated from Nova Southeastern College of Osteo Medicine
Dr. Siddens graduated from Nova Southeastern College of Osteo Medicine in 1986.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Delmar Siddens'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| Training, board certification and memberships | Dmand AI Professional Profile 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 Delmar Siddens
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 Delmar Siddens' NPI number?
Dr. John Delmar Siddens' NPI number is 1407826993. It was assigned on January 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Delmar Siddens?
Dr. John Delmar Siddens is an ophthalmologist in Greenville, South Carolina. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. John Delmar Siddens practice?
Dr. Siddens practices at 104 Simpson St, Greenville, SC 29605. Dr. Siddens' primary practice is Prisma Health University Medical Group in Greenville, South Carolina. Dmand AI also links Dr. Siddens to 1 group practice or clinic.
What is Dr. John Delmar Siddens' office phone number?
The practice phone on file for Dr. Siddens is (864) 454-2000.
What is Dr. John Delmar Siddens' medical license number?
Dr. Siddens holds South Carolina license 291.
Which hospitals is Dr. John Delmar Siddens affiliated with?
Dr. Siddens is affiliated with Prisma Health Greenville Memorial Hospital.
What medical group is Dr. John Delmar Siddens part of?
Dr. Siddens is linked to Prisma Health Medical Group.
Does Dr. John Delmar Siddens accept Medicare?
Yes. CMS data shows Dr. Siddens billed Medicare for 10,735 services in 2024, and Dr. Siddens accepts Medicare assignment.
How many Medicare patients does Dr. John Delmar Siddens see?
CMS counts 387 Medicare patients who saw Dr. Siddens in 2024, with an average age of 74.
What services does Dr. John Delmar Siddens bill to Medicare?
In 2024, Dr. Siddens' most billed Medicare services were injected or infused drug (J0585), eye exam or test (92012) and eye exam or test (92002).
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Where did Dr. John Delmar Siddens go to medical school?
Dr. Siddens graduated from Nova Southeastern College of Osteo Medicine in 1986.
What drugs does Dr. John Delmar Siddens prescribe most?
In 2024 Medicare Part D data, Dr. Siddens' most prescribed drugs by claims were Neomycin-Polymyxin-Dexameth, Erythromycin and Methylprednisolone.
Has Dr. John Delmar Siddens received payments from drug or device companies?
CMS Open Payments shows $411 in general payments to Dr. Siddens from 9 companies from 2016 to 2025. The largest total came from Mallinckrodt LLC.
How long has Dr. John Delmar Siddens been practicing?
Dr. Siddens graduated from medical school in 1986, 40 years ago.
Does Dr. John Delmar Siddens do research?
Dmand AI links 2 publications to Dr. Siddens, published from 2020 to 2022.
Who does Dr. John Delmar Siddens publish with?
Dr. Siddens' most frequent co-authors are Mitchell Jay Wolin, MD (1 shared paper).
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