Dr. Mark D. Kelemen, MD
- Medicare services, 2024
- 3,979
- Medicare patients, 2024
- 2,111
- Part D claims, 2024
- 1,283
- Hospital affiliations
- 6
- Industry payments
- $54
- Practice address
- 100 McGregor Street, Manchester, NH 03102
- Practice phone
- Call (603) 668-3545
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Kelemen's 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. Mark D. Kelemen is a cardiologist in Manchester, New Hampshire
Dr. Kelemen practices at Catholic Medical Center in Manchester, New Hampshire, part of HCA Healthcare.
Dr. Kelemen's NPI, 1902850548, was assigned on May 19, 2006. Dr. Kelemen graduated from Johns Hopkins University School of Medicine in 1990. Dr. Kelemen holds Maryland license D45643.
- NPI
- 1902850548NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103019849
- NPI enumeration date
- May 19, 2006
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (603) 668-3545
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark D. Kelemen practices at Catholic Medical Center in Manchester, New Hampshire
Dr. Kelemen's primary practice is Catholic Medical Center, at 100 McGregor Street, Manchester, NH 03102 in Hillsborough County. The practice phone is (603) 668-3545.
- Catholic Medical Center100 McGregor Street, Manchester, NH 03102 · Hillsborough CountyPhone(603) 668-3545
Source: Dmand AI Affiliation Data
Dr. Mark D. Kelemen is affiliated with 6 sites of care and 3 medical groups
Dr. Kelemen's primary practice is Catholic Medical Center in Manchester, New Hampshire, part of HCA Healthcare. Dr. Kelemen is also affiliated with The Johns Hopkins Hospital. The medical group on file is Portsmouth Internal Medicine. Dmand AI also links Dr. Kelemen to 4 more hospitals and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark D. Kelemen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kelemen practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Catholic Medical Center | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark D. Kelemen is one of 127 cardiologists in New Hampshire
Cardiovascular disease is Dr. Kelemen's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dmand AI has Dr. Kelemen's licenses on file in 2 states: Maryland and Maine.
Specialties and state licenses
- Cardiovascular disease, MarylandPrimary
- Interventional cardiology, Maine
Cardiologists near Dr. Kelemen
Counts of cardiologists 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. Mark D. Kelemen billed Medicare for 3,979 services in 2024
CMS data shows 3,979 Medicare services from Dr. Kelemen across 18 procedure codes in 2024, for 2,111 Medicare patients. Medicare paid $163,799 for them.
Dr. Kelemen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,7002024: 2,75162%
- Office and hospital visits
- 2023: 9592024: 1,0439%
- Other services
- 2023: 02024: 185
Where Dr. Kelemen's Medicare services took place, 2024
- In an office59815%
- In a facility3,38185%
Dr. Kelemen compared with the New Hampshire median for cardiologists, 2024
- Dr. Kelemen
- New Hampshire median
- Medicare services
- 3,979vs 1,7652.3 times
- Medicare patients
- 2,111vs 1,20375% above
- Part D claims
- 1,039vs 1,25017% below
Medians across 127 cardiologists in New Hampshire with Dmand AI profiles that report each measure.
Dr. Kelemen's 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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark D. Kelemen treated 2,111 Medicare patients in 2024, average age 74
CMS counts 2,111 Medicare patients who saw Dr. Kelemen in 2024. The largest group is 65 to 74, with 751 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 2.19, 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. Kelemen's median patient age at 73, with 48% women.
Dr. Kelemen's Medicare patients by age, 2024
Dr. Kelemen's Medicare patients by sex, 2024
- Women1,15555%
- Men95645%
Chronic conditions among Dr. Kelemen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis56%
- Ischemic heart disease55%
- Heart failure47%
- Mood disorders44%
- Diabetes43%
- Atrial fibrillation42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kelemen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark D. Kelemen wrote 1,283 Medicare Part D claims in 2024
In 2024, Dr. Kelemen wrote 1,283 Medicare Part D claims for 211 patients. 81% of them were for generic drugs. CMS names the drug for 1,039 of them, across 21 drugs with 11 or more claims each, at $237,281 in total drug cost. In 2023, CMS named 747 claims across 18 drugs.
Dr. Kelemen's Part D claims by kind of drug, 2024
- Generic1,042 claims81%
- Brand-name241 claims19%
Dr. Kelemen's 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: 7472024: 1,03939%
Drugs named by CMS: 21 in 2024, 18 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. Mark D. Kelemen offers telehealth to Medicare patients
CMS lists Dr. Kelemen as offering telehealth.
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Mark D. Kelemen received $54 in industry payments in 2018
CMS Open Payments shows 4 general payments to Dr. Kelemen from 3 drug and device companies in 2018. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $28.
Companies that paid Dr. Kelemen the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark D. Kelemen graduated from Johns Hopkins University School of Medicine
Dr. Kelemen graduated from Johns Hopkins University School of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark D. Kelemen'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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) |
| 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. Mark D. Kelemen
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. Mark D. Kelemen's NPI number?
Dr. Mark D. Kelemen's NPI number is 1902850548. It was assigned on May 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark D. Kelemen?
Dr. Mark D. Kelemen is a cardiologist in Manchester, New Hampshire. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Mark D. Kelemen practice?
Dr. Kelemen practices at 100 McGregor Street, Manchester, NH 03102. Dr. Kelemen's primary practice is Catholic Medical Center in Manchester, New Hampshire, part of HCA Healthcare. Dmand AI also links Dr. Kelemen to 4 hospitals and 2 medical groups.
What is Dr. Mark D. Kelemen's office phone number?
The practice phone on file for Dr. Kelemen is (603) 668-3545.
What is Dr. Mark D. Kelemen's medical license number?
Dr. Kelemen holds Maryland license D45643, one of the licenses on file in 2 states.
Which states has Dr. Mark D. Kelemen been licensed in?
Dmand AI has state licenses on file for Dr. Kelemen in Maryland and Maine.
Which hospitals is Dr. Mark D. Kelemen affiliated with?
Dr. Kelemen practices at Catholic Medical Center in Manchester, New Hampshire. Dr. Kelemen is also affiliated with The Johns Hopkins Hospital. Dmand AI links Dr. Kelemen to 4 more hospitals.
What medical group is Dr. Mark D. Kelemen part of?
Dr. Kelemen is linked to Portsmouth Internal Medicine. Dmand AI links Dr. Kelemen to 2 more medical groups.
Does Dr. Mark D. Kelemen accept Medicare?
Yes. CMS data shows Dr. Kelemen billed Medicare for 3,979 services in 2024.
Does Dr. Mark D. Kelemen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Kelemen as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Mark D. Kelemen see?
CMS counts 2,111 Medicare patients who saw Dr. Kelemen in 2024, with an average age of 74.
What services does Dr. Mark D. Kelemen bill to Medicare?
In 2024, Dr. Kelemen's most billed Medicare services were heart test or procedure (93010), heart test or procedure (93306) and office visit, established patient (99214).
Where did Dr. Mark D. Kelemen go to medical school?
Dr. Kelemen graduated from Johns Hopkins University School of Medicine in 1990.
What drugs does Dr. Mark D. Kelemen prescribe most?
In 2024 Medicare Part D data, Dr. Kelemen's most prescribed drugs by claims were Metoprolol Succinate, Eliquis and Atorvastatin Calcium.
Has Dr. Mark D. Kelemen received payments from drug or device companies?
CMS Open Payments shows $54 in general payments to Dr. Kelemen from 3 companies from 2018 to 2018. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Mark D. Kelemen been practicing?
Dr. Kelemen graduated from medical school in 1990, 36 years ago.
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