Dr. John Marcelis, MD
- Medicare services, 2024
- 1,489
- Medicare patients, 2024
- 337
- Part D claims, 2024
- 2,101
- Affiliated sites
- 4
- Medical groups
- 2
- Practice address
- 10000 Anns Choice Way, Warminster, PA 18974
- Practice phone
- Call (215) 443-3850
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Erickson Health Medical Group of Pennsylvania
Warminster, Pennsylvania
Find Dr. Marcelis' 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 Marcelis is a geriatric medicine (internal medicine) physician in Warminster, Pennsylvania
Dr. Marcelis practices at Erickson Health Medical Group of Pennsylvania in Warminster, Pennsylvania.
Dr. Marcelis' NPI, 1285667105, was assigned on July 7, 2006. Dr. Marcelis graduated from Temple University School of Medicine in 1987. Dr. Marcelis holds Pennsylvania license MD045170E.
- NPI
- 1285667105NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4082753355
- NPI enumeration date
- July 7, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (215) 443-3850
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Marcelis practices at Erickson Health Medical Group of Pennsylvania in Warminster, Pennsylvania
Dr. Marcelis' primary practice is Erickson Health Medical Group of Pennsylvania, at 10000 Anns Choice Way, Warminster, PA 18974 in Bucks County. The practice phone is (215) 443-3850.
- Erickson Health Medical Group of Pennsylvania10000 Anns Choice Way, Warminster, PA 18974 · Bucks CountyPhone(215) 443-3850
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Marcelis is affiliated with 5 sites of care and 2 medical groups
Dr. Marcelis' primary practice is Erickson Health Medical Group of Pennsylvania in Warminster, Pennsylvania. The medical group on file is Ann's Choice Medical Center (Erickson Health Medical Group). Dmand AI also links Dr. Marcelis to 2 more skilled nursing facilities, 1 group practice or clinic, 1 home health agency and 1 medical group, each 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 Marcelis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marcelis practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Erickson Health Medical Group of Pennsylvania | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Marcelis is one of 171 geriatric medicine (internal medicine) physicians in Pennsylvania
Geriatric medicine is Dr. Marcelis' primary specialty in the NPI Registry, under taxonomy code 207RG0300X. Dmand AI has Dr. Marcelis' licenses on file in 2 states: Pennsylvania and New Jersey.
Specialties and state licenses
- Geriatric medicine (internal medicine), PennsylvaniaPrimary
- New Jersey license
Geriatric medicine (internal medicine) physicians near Dr. Marcelis
Counts of geriatric medicine (internal medicine) physicians 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 Marcelis billed Medicare for 1,489 services in 2024
CMS data shows 1,489 Medicare services from Dr. Marcelis across 15 procedure codes in 2024, for 337 Medicare patients. Medicare paid $82,767 for them. Every service was in an office.
Dr. Marcelis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 6522024: 6313%
- Other services
- 2023: 3732024: 42414%
- Office and hospital visits
- 2023: 2492024: 2646%
- Surgery
- 2023: 1962024: 15521%
- Lab and pathology
- 2023: 172024: 1512%
Dr. Marcelis compared with the Pennsylvania median for geriatric medicine (internal medicine) physicians, 2024
- Dr. Marcelis
- Pennsylvania median
- Medicare services
- 1,489vs 4843.1 times
- Medicare patients
- 337vs 19969% above
- Part D claims
- 1,701vs 8042.1 times
Medians across 178 geriatric medicine (internal medicine) physicians in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Marcelis' 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. Marcelis and other geriatric medicine (internal medicine) physicians in Pennsylvania.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Marcelis treated 337 Medicare patients in 2024, average age 85
CMS counts 337 Medicare patients who saw Dr. Marcelis in 2024. The largest group is 85 and over, with 193 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.39, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marcelis' median patient age at 87, with 63% women.
Dr. Marcelis' Medicare patients by age, 2024
Dr. Marcelis' Medicare patients by sex, 2024
- Women22366%
- Men11434%
Chronic conditions among Dr. Marcelis' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis56%
- Chronic kidney disease47%
- Anxiety31%
- Osteoporosis31%
- Mood disorders29%
- Ischemic heart disease27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marcelis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 87
Patient panel by sex, all payers
- Women63%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Marcelis wrote 2,101 Medicare Part D claims in 2024
In 2024, Dr. Marcelis wrote 2,101 Medicare Part D claims for 194 patients. 93% of them were for generic drugs. CMS names the drug for 1,701 of them, across 51 drugs with 11 or more claims each, at $59,262 in total drug cost. In 2023, CMS named 1,591 claims across 48 drugs.
Dr. Marcelis' Part D claims by kind of drug, 2024
- Generic1,952 claims93%
- Brand-name and other149 claims7%
Dr. Marcelis' 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. Marcelis' Part D claims, 2024
- Opioids1%20 of 2,101 claims
- Antibiotics2%47 of 2,101 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: 1,5912024: 1,7017%
Drugs named by CMS: 51 in 2024, 48 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 Marcelis takes part in Medicare
Dr. Marcelis 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. John Marcelis graduated from Temple University School of Medicine
Dr. Marcelis graduated from Temple University School of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Marcelis'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) |
| 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 Marcelis
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 Marcelis' NPI number?
Dr. John Marcelis' NPI number is 1285667105. It was assigned on July 7, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Marcelis?
Dr. John Marcelis is a geriatric medicine (internal medicine) physician in Warminster, Pennsylvania. The primary specialty in the NPI Registry is Geriatric Medicine (Internal Medicine) Physician (taxonomy code 207RG0300X).
Where does Dr. John Marcelis practice?
Dr. Marcelis practices at 10000 Anns Choice Way, Warminster, PA 18974. Dr. Marcelis' primary practice is Erickson Health Medical Group of Pennsylvania in Warminster, Pennsylvania. Dmand AI also links Dr. Marcelis to 2 skilled nursing facilities, 1 group practice or clinic, 1 home health agency and 1 medical group.
What is Dr. John Marcelis' office phone number?
The practice phone on file for Dr. Marcelis is (215) 443-3850.
What is Dr. John Marcelis' medical license number?
Dr. Marcelis holds Pennsylvania license MD045170E, one of the licenses on file in 2 states.
Which states has Dr. John Marcelis been licensed in?
Dmand AI has state licenses on file for Dr. Marcelis in Pennsylvania and New Jersey.
What medical group is Dr. John Marcelis part of?
Dr. Marcelis is linked to Ann's Choice Medical Center (Erickson Health Medical Group). Dmand AI links Dr. Marcelis to 1 more medical group.
Does Dr. John Marcelis accept Medicare?
Yes. CMS data shows Dr. Marcelis billed Medicare for 1,489 services in 2024, and Dr. Marcelis accepts Medicare assignment.
How many Medicare patients does Dr. John Marcelis see?
CMS counts 337 Medicare patients who saw Dr. Marcelis in 2024, with an average age of 85.
What services does Dr. John Marcelis bill to Medicare?
In 2024, Dr. Marcelis' most billed Medicare services were vaccine or vaccine administration (90480), medical service (91320) and vaccine or vaccine administration (90662).
Show 3 more questionsShow fewer questions
Where did Dr. John Marcelis go to medical school?
Dr. Marcelis graduated from Temple University School of Medicine in 1987.
What drugs does Dr. John Marcelis prescribe most?
In 2024 Medicare Part D data, Dr. Marcelis' most prescribed drugs by claims were Warfarin Sodium, Levothyroxine Sodium and Atorvastatin Calcium.
How long has Dr. John Marcelis been practicing?
Dr. Marcelis graduated from medical school in 1987, 39 years ago.
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