Dr. Nicholas John Karis, MD
- Medicare services, 2024
- 204
- Medicare patients, 2024
- 132
- Hospital affiliations
- 3
- Industry payments
- $24,765
- Medical groups
- 2
- Practice address
- 2401 West Belvedere Avenue, Baltimore, MD 21215
- Practice phone
- Call (410) 601-9000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Karis' 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 John Karis is a cardiothoracic surgeon in Baltimore, Maryland
Dr. Karis practices at Sinai Hospital of Baltimore in Baltimore, Maryland, part of LifeBridge Health.
Dr. Karis' NPI, 1518140946, was assigned on December 7, 2007. Dr. Karis graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1996. Dr. Karis holds New York license 261058.
- NPI
- 1518140946NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567540115
- NPI enumeration date
- December 7, 2007
- NPI status
- Active
- Practice phone
- (410) 601-9000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Nicholas John Karis practices at Sinai Hospital of Baltimore in Baltimore, Maryland
Dr. Karis' primary practice is Sinai Hospital of Baltimore, at 2401 West Belvedere Avenue, Baltimore, MD 21215 in Baltimore City. The practice phone is (410) 601-9000.
- Sinai Hospital of Baltimore2401 West Belvedere Avenue, Baltimore, MD 21215 · Baltimore CityPhone(410) 601-9000
Source: Dmand AI Affiliation Data
Dr. Nicholas John Karis is affiliated with 4 sites of care and 2 medical groups
Dr. Karis' primary practice is Sinai Hospital of Baltimore in Baltimore, Maryland, part of LifeBridge Health. Dr. Karis is also affiliated with Greater Baltimore Medical Center. The medical group on file is Sinai Rehab Pain Medicine Associates. Dmand AI also links Dr. Karis to 1 more hospital, 1 group practice or clinic and 1 medical group, 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. Nicholas John Karis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Karis practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sinai Hospital of Baltimore | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across LifeBridge Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Nicholas John Karis is one of 77 cardiothoracic surgeons in Maryland
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Karis' primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Karis is board certified in thoracic and cardiac surgery by the American Board of Thoracic Surgery. Dmand AI has Dr. Karis' licenses on file in 6 states: New York, Illinois, Maryland, Mississippi, Indiana and Ohio.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), New YorkPrimary
- Illinois license
- Maryland license
- Mississippi license
- Indiana license
- Ohio license
Clinical focus
Dmand AI lists esophagus, stomach, or upper small intestine surgery and lung resection among the conditions Dr. Karis treats.
Cardiothoracic surgeons near Dr. Karis
Counts of cardiothoracic surgeons 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 John Karis billed Medicare for 204 services in 2024
CMS data shows 204 Medicare services from Dr. Karis across 7 procedure codes in 2024, for 132 Medicare patients. Medicare paid $57,150 for them.
Dr. Karis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1532024: 1465%
- Surgery
- 2023: 272024: 58115%
Where Dr. Karis' Medicare services took place, 2024
- In an office12360%
- In a facility8140%
Dr. Karis compared with the Maryland median for cardiothoracic surgeons, 2024
- Dr. Karis
- Maryland median
- Medicare services
- 204vs 1898% above
- Medicare patients
- 132vs 1448% below
Medians across 66 cardiothoracic surgeons in Maryland with Dmand AI profiles that report each measure.
Dr. Karis' 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. Karis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Karis and other cardiothoracic surgeons in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nicholas John Karis treated 132 Medicare patients in 2024, average age 73
CMS counts 132 Medicare patients who saw Dr. Karis in 2024. The largest group is 65 to 74, with 58 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 21% are also on Medicaid. Their average risk score is 1.90, 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. Karis' median patient age at 70, with 49% women.
Dr. Karis' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Karis' Medicare patients by sex, 2024
- Women6448%
- Men6852%
Chronic conditions among Dr. Karis' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Cancer64%
- COPD55%
- Arthritis49%
- Ischemic heart disease45%
- Diabetes43%
- Mood disorders37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Karis' 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
- Women49%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
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Dr. Nicholas John Karis received $24,765 in industry payments from 2016 to 2025
CMS Open Payments shows 79 general payments to Dr. Karis from 14 drug and device companies from 2016 to 2025. Education make up the largest share, 59% of the total. Intuitive Surgical, Inc. paid the most, $22,765.
General payments to Dr. Karis by program year, 2016 to 2025
General payments to Dr. Karis by kind, 2016 to 2025
- Education$14,72759%
- Travel and lodging$5,75223%
- Food and beverage$2,78611%
- Debt forgiveness$1,5006%
Companies that paid Dr. Karis 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. Nicholas John Karis graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science
Dr. Karis graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1996. Dr. Karis is a member of ACC, ACS and AMA.
- Medical school
- Board certified in thoracic and cardiac surgery
Source: Dmand AI Professional Profile Data
Dr. Nicholas John Karis accepts plans from 12 insurance carriers
Dr. Karis is in network with 12 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- CareFirst BlueCross BlueShield
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- +4 more carriersWith a free account
Plan types Dr. Karis accepts, by number of carriers
- Medicare9
- PPO8
- HMO5
- POS4
- EPO3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Nicholas John Karis'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Nicholas John Karis
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 John Karis' NPI number?
Dr. Nicholas John Karis' NPI number is 1518140946. It was assigned on December 7, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Nicholas John Karis?
Dr. Nicholas John Karis is a cardiothoracic surgeon in Baltimore, Maryland. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).
Where does Dr. Nicholas John Karis practice?
Dr. Karis practices at 2401 West Belvedere Avenue, Baltimore, MD 21215. Dr. Karis' primary practice is Sinai Hospital of Baltimore in Baltimore, Maryland, part of LifeBridge Health. Dmand AI also links Dr. Karis to 1 hospital, 1 group practice or clinic and 1 medical group.
What is Dr. Nicholas John Karis' office phone number?
The practice phone on file for Dr. Karis is (410) 601-9000.
What is Dr. Nicholas John Karis' medical license number?
Dr. Karis holds New York license 261058, one of the licenses on file in 6 states.
Which states has Dr. Nicholas John Karis been licensed in?
Dmand AI has state licenses on file for Dr. Karis in New York (2011 to 2026), Illinois (2001 to 2026), Maryland (2019 to 2026), Mississippi (2006 to 2015), Indiana (2008 to 2011) and Ohio (2010 to 2011).
Which hospitals is Dr. Nicholas John Karis affiliated with?
Dr. Karis practices at Sinai Hospital of Baltimore in Baltimore, Maryland. Dr. Karis is also affiliated with Greater Baltimore Medical Center. Dmand AI links Dr. Karis to 1 more hospital.
What medical group is Dr. Nicholas John Karis part of?
Dr. Karis is linked to Sinai Rehab Pain Medicine Associates. Dmand AI links Dr. Karis to 1 more medical group.
Does Dr. Nicholas John Karis accept Medicare?
Yes. CMS data shows Dr. Karis billed Medicare for 204 services in 2024.
How many Medicare patients does Dr. Nicholas John Karis see?
CMS counts 132 Medicare patients who saw Dr. Karis in 2024, with an average age of 73.
Show 6 more questionsShow fewer questions
Is Dr. Nicholas John Karis board certified?
Yes. Dr. Karis is board certified in thoracic and cardiac surgery by the American Board of Thoracic Surgery.
What services does Dr. Nicholas John Karis bill to Medicare?
In 2024, Dr. Karis' most billed Medicare services were office visit, established patient (99213), office visit, new patient (99204) and surgery: lungs and airway (32674).
Where did Dr. Nicholas John Karis go to medical school?
Dr. Karis graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1996.
Has Dr. Nicholas John Karis received payments from drug or device companies?
CMS Open Payments shows $24,765 in general payments to Dr. Karis from 14 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Nicholas John Karis been practicing?
Dr. Karis graduated from medical school in 1996, 30 years ago.
What insurance does Dr. Nicholas John Karis accept?
Dr. Karis is in network with 12 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
Selling to thoracic surgery (cardiothoracic vascular surgery) practices?
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