Dr. Nicholas Gourtzelis, MD
- Medicare services, 2024
- 5,107
- Medicare patients, 2024
- 701
- Part D claims, 2024
- 1,350
- Hospital affiliations
- 7
- Industry payments
- $11,885
- Practice address
- 3009 N Ballas Rd, Saint Louis, MO 63131
- Practice phone
- Call (636) 467-5619
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Arnold Dialysis
Saint Louis, Missouri
Find Dr. Gourtzelis' 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. Nicholas Gourtzelis is a nephrologist in Saint Louis, Missouri
Dr. Gourtzelis practices at Arnold Dialysis in Saint Louis, Missouri.
Dr. Gourtzelis' NPI, 1790734994, was assigned on May 8, 2006. Dr. Gourtzelis holds Missouri license 2005006931.
- NPI
- 1790734994NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5496798076
- NPI enumeration date
- May 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (636) 467-5619
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nicholas Gourtzelis practices at Arnold Dialysis in Saint Louis, Missouri
Dr. Gourtzelis' primary practice is Arnold Dialysis, at 3009 N Ballas Rd, Saint Louis, MO 63131 in Saint Louis County. The practice phone is (636) 467-5619.
- Arnold Dialysis3009 N Ballas Rd, Saint Louis, MO 63131 · Saint Louis CountyPhone(636) 467-5619
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Nicholas Gourtzelis is affiliated with 14 sites of care and 1 medical group
Dr. Gourtzelis' primary practice is Arnold Dialysis in Saint Louis, Missouri. Dr. Gourtzelis is also affiliated with Mercy Hospital St. Louis. The medical group on file is Nephrology and Hypertension Specialists. Dmand AI also links Dr. Gourtzelis to 6 more hospitals, 4 dialysis centers, 1 group practice or clinic and 1 hospice, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nicholas Gourtzelis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gourtzelis practices, 13 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Arnold Dialysis | Available with a free account |
| +13 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nicholas Gourtzelis is one of 249 nephrologists in Missouri
Nephrology is Dr. Gourtzelis' primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Gourtzelis is licensed in Missouri.
Specialties and state licenses
- Nephrology, MissouriPrimary
Nephrologists near Dr. Gourtzelis
Counts of nephrologists 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. Nicholas Gourtzelis billed Medicare for 5,107 services in 2024
CMS data shows 5,107 Medicare services from Dr. Gourtzelis across 18 procedure codes in 2024, for 701 Medicare patients. Medicare paid $339,904 for them.
Dr. Gourtzelis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,8842024: 4,675148%
- Tests and treatments
- 2023: 4222024: 4322%
Where Dr. Gourtzelis' Medicare services took place, 2024
- In an office2,60751%
- In a facility2,50049%
Dr. Gourtzelis compared with the Missouri median for nephrologists, 2024
- Dr. Gourtzelis
- Missouri median
- Medicare services
- 5,107vs 8576.0 times
- Medicare patients
- 701vs 2712.6 times
- Part D claims
- 1,069vs 77937% above
Medians across 240 nephrologists in Missouri with Dmand AI profiles that report each measure.
Dr. Gourtzelis' 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. Gourtzelis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gourtzelis and other nephrologists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nicholas Gourtzelis treated 701 Medicare patients in 2024, average age 75
CMS counts 701 Medicare patients who saw Dr. Gourtzelis in 2024. The largest group is 75 to 84, with 233 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 21% are also on Medicaid. Their average risk score is 3.88, 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. Gourtzelis' median patient age at 74, with 46% women.
Dr. Gourtzelis' Medicare patients by age, 2024
Dr. Gourtzelis' Medicare patients by sex, 2024
- Women31845%
- Men38355%
Chronic conditions among Dr. Gourtzelis' Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes61%
- Heart failure61%
- Arthritis59%
- Ischemic heart disease59%
- Atrial fibrillation46%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gourtzelis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women46%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nicholas Gourtzelis wrote 1,350 Medicare Part D claims in 2024
In 2024, Dr. Gourtzelis wrote 1,350 Medicare Part D claims for 234 patients. 85% of them were for generic drugs. CMS names the drug for 1,069 of them, across 28 drugs with 11 or more claims each, at $345,237 in total drug cost. In 2023, CMS named 1,329 claims across 35 drugs.
Dr. Gourtzelis' Part D claims by kind of drug, 2024
- Generic1,145 claims85%
- Brand-name205 claims15%
Dr. Gourtzelis' 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. Gourtzelis' Part D claims, 2024
- Opioids1%13 of 1,350 claims
- Antibiotics1%15 of 1,350 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: 1,3292024: 1,06920%
Drugs named by CMS: 28 in 2024, 35 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. Nicholas Gourtzelis takes part in Medicare
Dr. Gourtzelis accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Nicholas Gourtzelis received $11,885 in industry payments from 2016 to 2025
CMS Open Payments shows 648 general payments to Dr. Gourtzelis from 48 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $1,714.
General payments to Dr. Gourtzelis by program year, 2016 to 2025
General payments to Dr. Gourtzelis by kind, 2016 to 2025
- Food and beverage$11,62798%
- Education$2562%
- Gifts$20%
Companies that paid Dr. Gourtzelis the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Nicholas Gourtzelis'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 DataDmand AI Org Hierarchy 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Nicholas Gourtzelis
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. Nicholas Gourtzelis' NPI number?
Dr. Nicholas Gourtzelis' NPI number is 1790734994. It was assigned on May 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Nicholas Gourtzelis?
Dr. Nicholas Gourtzelis is a nephrologist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Nicholas Gourtzelis practice?
Dr. Gourtzelis practices at 3009 N Ballas Rd, Saint Louis, MO 63131. Dr. Gourtzelis' primary practice is Arnold Dialysis in Saint Louis, Missouri. Dmand AI also links Dr. Gourtzelis to 6 hospitals, 4 dialysis centers, 1 group practice or clinic and 1 hospice.
What is Dr. Nicholas Gourtzelis' office phone number?
The practice phone on file for Dr. Gourtzelis is (636) 467-5619.
What is Dr. Nicholas Gourtzelis' medical license number?
Dr. Gourtzelis holds Missouri license 2005006931.
Which hospitals is Dr. Nicholas Gourtzelis affiliated with?
Dr. Gourtzelis is affiliated with Mercy Hospital St. Louis. Dmand AI links Dr. Gourtzelis to 6 more hospitals.
What medical group is Dr. Nicholas Gourtzelis part of?
Dr. Gourtzelis is linked to Nephrology and Hypertension Specialists.
Does Dr. Nicholas Gourtzelis accept Medicare?
Yes. CMS data shows Dr. Gourtzelis billed Medicare for 5,107 services in 2024, and Dr. Gourtzelis accepts Medicare assignment.
How many Medicare patients does Dr. Nicholas Gourtzelis see?
CMS counts 701 Medicare patients who saw Dr. Gourtzelis in 2024, with an average age of 75.
What services does Dr. Nicholas Gourtzelis bill to Medicare?
In 2024, Dr. Gourtzelis' most billed Medicare services were hospital inpatient care (99232), care management and other visits (99458) and care management and other visits (99439).
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What drugs does Dr. Nicholas Gourtzelis prescribe most?
In 2024 Medicare Part D data, Dr. Gourtzelis' most prescribed drugs by claims were Calcitriol, Hydralazine HCl and Furosemide.
Has Dr. Nicholas Gourtzelis received payments from drug or device companies?
CMS Open Payments shows $11,885 in general payments to Dr. Gourtzelis from 48 companies from 2016 to 2025. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. Nicholas Gourtzelis been practicing?
Dr. Gourtzelis graduated from medical school in 2000, 26 years ago.
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