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Dr. John G. Mellas, MD
NPI1497712079PAC ID2062506132
- Medicare services, 2024
- 455
- Medicare patients, 2024
- 101
- Part D claims, 2024
- 2,749
- Publications
- 2
- Hospital affiliations
- 3
- Practice address
- 4950 Childrens Pl, Saint Louis, MO 63110
- Practice phone
- Call (314) 752-5913
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Shrewsbury Dialysis
Saint Louis, Missouri
Find Dr. Mellas' 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 G. Mellas is a nephrologist in Saint Louis, Missouri
Dr. Mellas practices at Shrewsbury Dialysis in Saint Louis, Missouri.
Dr. Mellas' NPI, 1497712079, was assigned on April 27, 2006. Dr. Mellas graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1977. Dr. Mellas holds Missouri license R3E73.
NPI and contact details
- NPI
- 1497712079NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2062506132
- NPI enumeration date
- April 27, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 752-5913
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 75
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John G. Mellas practices at Shrewsbury Dialysis in Saint Louis, Missouri
Dr. Mellas' primary practice is Shrewsbury Dialysis, at 4950 Childrens Pl, Saint Louis, MO 63110 in Saint Louis City. The practice phone is (314) 752-5913.
- Shrewsbury Dialysis4950 Childrens Pl, Saint Louis, MO 63110 · Saint Louis CityPhone(314) 752-5913
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John G. Mellas is affiliated with 8 sites of care and 1 medical group
Dr. Mellas' primary practice is Shrewsbury Dialysis in Saint Louis, Missouri. Dr. Mellas is also affiliated with Missouri Baptist Medical Center. The medical group on file is Nephrology and Hypertension Specialists. Dmand AI also links Dr. Mellas to 2 more hospitals, 3 dialysis centers and 1 group practice or clinic, each named with a free account.
Shrewsbury DialysisPrimary
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. John G. Mellas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mellas practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Shrewsbury Dialysis | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. John G. Mellas is one of 249 nephrologists in Missouri
Nephrology is Dr. Mellas' primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Mellas is licensed in Missouri.
Specialties and state licenses
- Nephrology, MissouriPrimary
Nephrologists near Dr. Mellas
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. John G. Mellas billed Medicare for 455 services in 2024
CMS data shows 455 Medicare services from Dr. Mellas across 6 procedure codes in 2024, for 101 Medicare patients. Medicare paid $79,204 for them.
Medicare services, 2024455
Medicare patients101
Paid by Medicare$79,204
Procedure codes6
Dr. Mellas' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 4422024: 27937%
- Office and hospital visits
- 2023: 3572024: 17651%
Where Dr. Mellas' Medicare services took place, 2024
- In an office32070%
- In a facility13530%
Dr. Mellas compared with the Missouri median for nephrologists, 2024
- Dr. Mellas
- Missouri median
- Medicare services
- 455vs 85747% below
- Medicare patients
- 101vs 27163% below
- Part D claims
- 2,346vs 7793.0 times
Medians across 240 nephrologists in Missouri with Dmand AI profiles that report each measure.
Dr. Mellas' 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. Mellas?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mellas and other nephrologists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John G. Mellas treated 101 Medicare patients in 2024, average age 69
CMS counts 101 Medicare patients who saw Dr. Mellas in 2024. The largest group is 65 to 74, with 35 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 35% are also on Medicaid. Their average risk score is 6.03, 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. Mellas' median patient age at 70, with 47% women.
Medicare patients, 2024101
Average age69
Average risk score6.03
Also on Medicaid35%
Dr. Mellas' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mellas' Medicare patients by sex, 2024
- Women4747%
- Men5453%
Chronic conditions among Dr. Mellas' Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes63%
- Heart failure63%
- Ischemic heart disease53%
- Mood disorders46%
- Arthritis45%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mellas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women47%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John G. Mellas wrote 2,749 Medicare Part D claims in 2024
In 2024, Dr. Mellas wrote 2,749 Medicare Part D claims for 206 patients. 87% of them were for generic drugs. CMS names the drug for 2,346 of them, across 61 drugs with 11 or more claims each, at $415,140 in total drug cost. In 2023, CMS named 2,236 claims across 59 drugs.
Part D claims, 20242,749
Drugs named by CMS61
Total drug cost$415,140
Part D patients206
Dr. Mellas' Part D claims by kind of drug, 2024
- Generic2,399 claims87%
- Brand-name330 claims12%
- Other20 claims1%
Dr. Mellas' 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. Mellas' Part D claims, 2024
- Opioids8%227 of 2,749 claims
- Antibiotics4%106 of 2,749 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: 2,2362024: 2,3465%
Drugs named by CMS: 61 in 2024, 59 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. John G. Mellas takes part in Medicare
Dr. Mellas 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)
For MedTech and pharma teams
Find nephrologists like Dr. Mellas by procedure volume and prescribing
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Dr. John G. Mellas has 2 publications on record
Dmand AI links 2 papers to Dr. Mellas, published from 2014 to 2017.
Papers2
Years published2014 to 2017
Recent publications by Dr. Mellas
See who Dr. Mellas researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Mellas works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John G. Mellas received $973 in industry payments from 2016 to 2025
CMS Open Payments shows 36 general payments to Dr. Mellas from 10 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 90% of the total. Mallinckrodt LLC paid the most, $379.
General payments to Dr. Mellas by program year, 2016 to 2025
General payments to Dr. Mellas by kind, 2016 to 2025
$973in total
- Food and beverage$87890%
- Education$9510%
Companies that paid Dr. Mellas 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 G. Mellas graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Mellas graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1977.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John G. Mellas'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) |
| 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 G. Mellas
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 G. Mellas' NPI number?
Dr. John G. Mellas' NPI number is 1497712079. It was assigned on April 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John G. Mellas?
Dr. John G. Mellas is a nephrologist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. John G. Mellas practice?
Dr. Mellas practices at 4950 Childrens Pl, Saint Louis, MO 63110. Dr. Mellas' primary practice is Shrewsbury Dialysis in Saint Louis, Missouri. Dmand AI also links Dr. Mellas to 2 hospitals, 3 dialysis centers and 1 group practice or clinic.
What is Dr. John G. Mellas' office phone number?
The practice phone on file for Dr. Mellas is (314) 752-5913.
What is Dr. John G. Mellas' medical license number?
Dr. Mellas holds Missouri license R3E73.
Which hospitals is Dr. John G. Mellas affiliated with?
Dr. Mellas is affiliated with Missouri Baptist Medical Center. Dmand AI links Dr. Mellas to 2 more hospitals.
What medical group is Dr. John G. Mellas part of?
Dr. Mellas is linked to Nephrology and Hypertension Specialists.
Does Dr. John G. Mellas accept Medicare?
Yes. CMS data shows Dr. Mellas billed Medicare for 455 services in 2024, and Dr. Mellas accepts Medicare assignment.
How many Medicare patients does Dr. John G. Mellas see?
CMS counts 101 Medicare patients who saw Dr. Mellas in 2024, with an average age of 69.
What services does Dr. John G. Mellas bill to Medicare?
In 2024, Dr. Mellas' most billed Medicare services were dialysis (90960), hospital inpatient care (99232) and office visit, established patient (99213).
Show 5 more questionsShow fewer questions
Where did Dr. John G. Mellas go to medical school?
Dr. Mellas graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1977.
What drugs does Dr. John G. Mellas prescribe most?
In 2024 Medicare Part D data, Dr. Mellas' most prescribed drugs by claims were Amlodipine Besylate, Sevelamer Carbonate and Oxycodone-Acetaminophen.
Has Dr. John G. Mellas received payments from drug or device companies?
CMS Open Payments shows $973 in general payments to Dr. Mellas from 10 companies from 2016 to 2025. The largest total came from Mallinckrodt LLC.
How long has Dr. John G. Mellas been practicing?
Dr. Mellas graduated from medical school in 1977, 49 years ago.
Does Dr. John G. Mellas do research?
Dmand AI links 2 publications to Dr. Mellas, published from 2014 to 2017.
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