Critical PathwaysKidney Failure, ChronicMedicare
Dr. Roy G. Marcus, MD
NPI1245278084PAC ID8729146204
- Medicare services, 2024
- 122
- Medicare patients, 2024
- 107
- Part D claims, 2024
- 478
- Publications
- 1
- MIPS score, 2024
- 92
- Practice address
- 1 Medical Center Blvd, Chester, PA 19013
- Practice phone
- Call (610) 447-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Crozer Chester Medical Center (CLOSED)
Chester, Pennsylvania
Find Dr. Marcus' professional email, personal email and mobile number
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Dr. Roy G. Marcus is a nephrologist in Chester, Pennsylvania
Dr. Marcus practices at Crozer Chester Medical Center (CLOSED) in Chester, Pennsylvania.
Dr. Marcus' NPI, 1245278084, was assigned on June 3, 2006. Dr. Marcus graduated from Temple University School of Medicine in 1986. Dr. Marcus holds Pennsylvania license MD061386L.
NPI and contact details
- NPI
- 1245278084NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8729146204
- NPI enumeration date
- June 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (610) 447-2000
- 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. Roy G. Marcus practices at Crozer Chester Medical Center (CLOSED) in Chester, Pennsylvania
Dr. Marcus' primary practice is Crozer Chester Medical Center (CLOSED), at 1 Medical Center Blvd, Chester, PA 19013 in Delaware County. The practice phone is (610) 447-2000.
- Crozer Chester Medical Center (CLOSED)1 Medical Center Blvd, Chester, PA 19013 · Delaware CountyPhone(610) 447-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Roy G. Marcus is affiliated with 4 sites of care and 1 medical group
Dr. Marcus' primary practice is Crozer Chester Medical Center (CLOSED) in Chester, Pennsylvania. The medical group on file is Clinical Renal Associates. Dmand AI also links Dr. Marcus to 2 more dialysis centers and 1 group practice or clinic, each named with a free account.
Crozer Chester Medical Center (CLOSED)Primary
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. Roy G. Marcus' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marcus practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Crozer Chester Medical Center (CLOSED) | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Roy G. Marcus is one of 552 nephrologists in Pennsylvania
Nephrology is Dr. Marcus' primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Marcus is licensed in Pennsylvania.
Specialties and state licenses
- Nephrology, PennsylvaniaPrimary
Nephrologists near Dr. Marcus
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. Roy G. Marcus billed Medicare for 122 services in 2024
CMS data shows 122 Medicare services from Dr. Marcus across 5 procedure codes in 2024, for 107 Medicare patients. Medicare paid $21,166 for them.
Medicare services, 2024122
Medicare patients107
Paid by Medicare$21,166
Procedure codes5
Dr. Marcus' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1972024: 6169%
- Office and hospital visits
- 2023: 612024: 61No change
Where Dr. Marcus' Medicare services took place, 2024
- In an office6150%
- In a facility6150%
Dr. Marcus compared with the Pennsylvania median for nephrologists, 2024
- Dr. Marcus
- Pennsylvania median
- Medicare services
- 122vs 77284% below
- Medicare patients
- 107vs 27561% below
- Part D claims
- 320vs 55242% below
Medians across 548 nephrologists in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Marcus' 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. Marcus?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marcus and other nephrologists in Pennsylvania.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Roy G. Marcus treated 107 Medicare patients in 2024, average age 70
CMS counts 107 Medicare patients who saw Dr. Marcus in 2024. The largest group is 65 to 74, with 44 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 36% are also on Medicaid. Their average risk score is 5.30, 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. Marcus' median patient age at 62, with 42% women.
Medicare patients, 2024107
Average age70
Average risk score5.30
Also on Medicaid36%
Dr. Marcus' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Marcus' Medicare patients by sex, 2024
- Women5047%
- Men5753%
Chronic conditions among Dr. Marcus' Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Heart failure56%
- Arthritis51%
- Diabetes51%
- Ischemic heart disease51%
- Mood disorders41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marcus' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women42%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Roy G. Marcus wrote 478 Medicare Part D claims in 2024
In 2024, Dr. Marcus wrote 478 Medicare Part D claims for 118 patients. 93% of them were for generic drugs. CMS names the drug for 320 of them, across 13 drugs with 11 or more claims each, at $25,017 in total drug cost. In 2023, CMS named 513 claims across 19 drugs.
Part D claims, 2024478
Drugs named by CMS13
Total drug cost$25,017
Part D patients118
Dr. Marcus' Part D claims by kind of drug, 2024
- Generic443 claims93%
- Brand-name35 claims7%
Dr. Marcus' 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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5132024: 32038%
Drugs named by CMS: 13 in 2024, 19 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. Roy G. Marcus scored 92 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 92 out of 100 for Dr. Marcus for performance year 2024, reported as part of a group. Dr. Marcus accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Marcus' MIPS scores, performance year 2024
- 92of 100Final score
- 74.3of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Roy G. Marcus has 1 publication on record
Dmand AI links 1 paper to Dr. Marcus in 2024. Dr. Marcus' most frequent co-authors are Katherine Westin Kwon, MD and Nirav N. Vakharia, MD.
Papers1
Dr. Marcus' most frequent co-authors
Recent publications by Dr. Marcus
See who Dr. Marcus researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Marcus 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. Roy G. Marcus received $5,678 in industry payments from 2016 to 2025
CMS Open Payments shows 160 general payments to Dr. Marcus from 27 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 70% of the total. Astute Medical, Inc. paid the most, $1,768.
General payments to Dr. Marcus by program year, 2016 to 2025
General payments to Dr. Marcus by kind, 2016 to 2025
$5.7Kin total
- Food and beverage$3,97170%
- Speaker and faculty fees$1,50026%
- Entertainment$1212%
- Education$862%
Companies that paid Dr. Marcus 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. Roy G. Marcus graduated from Temple University School of Medicine
Dr. Marcus graduated from Temple University School of Medicine in 1986.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Roy G. Marcus'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)Clinician Public Reporting: Overall MIPS Performance (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. Roy G. Marcus
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. Roy G. Marcus' NPI number?
Dr. Roy G. Marcus' NPI number is 1245278084. It was assigned on June 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Roy G. Marcus?
Dr. Roy G. Marcus is a nephrologist in Chester, Pennsylvania. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Roy G. Marcus practice?
Dr. Marcus practices at 1 Medical Center Blvd, Chester, PA 19013. Dr. Marcus' primary practice is Crozer Chester Medical Center (CLOSED) in Chester, Pennsylvania. Dmand AI also links Dr. Marcus to 2 dialysis centers and 1 group practice or clinic.
What is Dr. Roy G. Marcus' office phone number?
The practice phone on file for Dr. Marcus is (610) 447-2000.
What is Dr. Roy G. Marcus' medical license number?
Dr. Marcus holds Pennsylvania license MD061386L.
What medical group is Dr. Roy G. Marcus part of?
Dr. Marcus is linked to Clinical Renal Associates.
Does Dr. Roy G. Marcus accept Medicare?
Yes. CMS data shows Dr. Marcus billed Medicare for 122 services in 2024, and Dr. Marcus accepts Medicare assignment.
What is Dr. Roy G. Marcus' MIPS score?
Dr. Marcus' MIPS final score for performance year 2024 is 92 out of 100, reported as part of a group.
How many Medicare patients does Dr. Roy G. Marcus see?
CMS counts 107 Medicare patients who saw Dr. Marcus in 2024, with an average age of 70.
What services does Dr. Roy G. Marcus bill to Medicare?
In 2024, Dr. Marcus' most billed Medicare services were dialysis (90960), hospital inpatient care (99232) and dialysis (90961).
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Where did Dr. Roy G. Marcus go to medical school?
Dr. Marcus graduated from Temple University School of Medicine in 1986.
What drugs does Dr. Roy G. Marcus prescribe most?
In 2024 Medicare Part D data, Dr. Marcus' most prescribed drugs by claims were Atorvastatin Calcium, Doxazosin Mesylate and Losartan Potassium.
Has Dr. Roy G. Marcus received payments from drug or device companies?
CMS Open Payments shows $5,678 in general payments to Dr. Marcus from 27 companies from 2016 to 2025. The largest total came from Astute Medical, Inc.
How long has Dr. Roy G. Marcus been practicing?
Dr. Marcus graduated from medical school in 1986, 40 years ago.
Does Dr. Roy G. Marcus do research?
Dmand AI links 1 publication to Dr. Marcus.
Who does Dr. Roy G. Marcus publish with?
Dr. Marcus' most frequent co-authors are Katherine Westin Kwon, MD (1 shared paper) and Nirav N. Vakharia, MD (1 shared paper).
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