Dr. Jan Gajewski, MD
- Medicare services, 2024
- 35
- Medicare patients, 2024
- 202
- MIPS score, 2024
- 100
- Hospital affiliations
- 3
- Industry payments
- $316
- Practice address
- One Robert Wood Johnson Place, New Brunswick, NJ 08901
- Practice phone
- Call (732) 828-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gajewski'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. Jan Gajewski is an anesthesiologist in New Brunswick, New Jersey
Dr. Gajewski practices at Robert Wood Johnson University Hospital in New Brunswick, New Jersey, part of RWJBarnabas Health.
Dr. Gajewski's NPI, 1437114097, was assigned on April 18, 2006. Dr. Gajewski graduated from Rutgers New Jersey Medical School in 1990. Dr. Gajewski holds New Jersey license MA60425.
- NPI
- 1437114097NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426190109
- NPI enumeration date
- April 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (732) 828-3000
- 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. Jan Gajewski practices at 2 locations in New Brunswick, New Jersey
Dr. Gajewski's primary practice is Robert Wood Johnson University Hospital, at One Robert Wood Johnson Place, New Brunswick, NJ 08901 in Middlesex County. The practice phone is (732) 828-3000. Dr. Gajewski also practices at Robert Wood Johnson University Hospital - New Brunswick, 1 Robert Wood Johnson Pl, New Brunswick, NJ 08901.
- Robert Wood Johnson University HospitalPrimaryOne Robert Wood Johnson Place, New Brunswick, NJ 08901 · Middlesex CountyPhone(732) 828-3000
- Robert Wood Johnson University Hospital - New Brunswick1 Robert Wood Johnson Pl, New Brunswick, NJ 08901 · Middlesex CountyPhone(732) 828-3000
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Jan Gajewski is affiliated with 7 sites of care and 4 medical groups
Dr. Gajewski's primary practice is Robert Wood Johnson University Hospital in New Brunswick, New Jersey, part of RWJBarnabas Health. Dr. Gajewski is also affiliated with Robert Wood Johnson University Hospital Somerset. The medical group on file is RWJBarnabas Health Medical Group. Dmand AI also links Dr. Gajewski to 1 more hospital, 4 group practices and clinics and 3 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. Jan Gajewski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gajewski practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Robert Wood Johnson University Hospital | Available with a free account |
| +6 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across RWJBarnabas Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jan Gajewski is one of 1,613 anesthesiologists in New Jersey
Anesthesiology is Dr. Gajewski's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Gajewski is licensed in New Jersey.
Specialties and state licenses
- Anesthesiology, New JerseyPrimary
Anesthesiologists near Dr. Gajewski
Counts of anesthesiologists 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. Jan Gajewski billed Medicare for 35 services in 2024
CMS data shows 35 Medicare services from Dr. Gajewski across 3 procedure codes in 2024, for 202 Medicare patients. Medicare paid $4,128 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Gajewski's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 332024: 356%
- Office and hospital visits
- 2023: 152024: 0100%
Dr. Gajewski compared with the New Jersey median for anesthesiologists, 2024
- Dr. Gajewski
- New Jersey median
- Medicare services
- 35vs 9262% below
- Medicare patients
- 202vs 16920% above
Medians across 1,604 anesthesiologists in New Jersey with Dmand AI profiles that report each measure.
Dr. Gajewski'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. Jan Gajewski treated 202 Medicare patients in 2024, average age 75
CMS counts 202 Medicare patients who saw Dr. Gajewski in 2024. The largest group is 65 to 74, with 86 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 12% are also on Medicaid. Their average risk score is 1.46, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Gajewski's median patient age at 64, with 51% women.
Dr. Gajewski's Medicare patients by age, 2024
Dr. Gajewski's Medicare patients by sex, 2024
- Women10853%
- Men9447%
Chronic conditions among Dr. Gajewski's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis60%
- Diabetes46%
- Ischemic heart disease42%
- Chronic kidney disease31%
- Anxiety26%
- Cancer26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gajewski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women51%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jan Gajewski scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Gajewski for performance year 2024, reported as part of a group. Dr. Gajewski accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Gajewski's MIPS scores, performance year 2024
- 100of 100Final score
- 94.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
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. Jan Gajewski received $316 in industry payments from 2016 to 2025
CMS Open Payments shows 10 general payments to Dr. Gajewski from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Halyard Health, Inc. paid the most, $138.
General payments to Dr. Gajewski by program year, 2016 to 2025
Companies that paid Dr. Gajewski 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. Jan Gajewski graduated from Rutgers New Jersey Medical School
Dr. Gajewski graduated from Rutgers New Jersey Medical School in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jan Gajewski'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 Affiliation DataDmand AI Practice 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) |
| 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) |
| 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. Jan Gajewski
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. Jan Gajewski's NPI number?
Dr. Jan Gajewski's NPI number is 1437114097. It was assigned on April 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jan Gajewski?
Dr. Jan Gajewski is an anesthesiologist in New Brunswick, New Jersey. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Jan Gajewski practice?
Dr. Gajewski practices at One Robert Wood Johnson Place, New Brunswick, NJ 08901. Dr. Gajewski also practices at 1 Robert Wood Johnson Pl, New Brunswick, NJ 08901. Dr. Gajewski's primary practice is Robert Wood Johnson University Hospital in New Brunswick, New Jersey, part of RWJBarnabas Health. Dmand AI also links Dr. Gajewski to 1 hospital, 4 group practices and clinics and 3 medical groups.
What is Dr. Jan Gajewski's office phone number?
The practice phone on file for Dr. Gajewski is (732) 828-3000.
What is Dr. Jan Gajewski's medical license number?
Dr. Gajewski holds New Jersey license MA60425.
Which hospitals is Dr. Jan Gajewski affiliated with?
Dr. Gajewski practices at Robert Wood Johnson University Hospital in New Brunswick, New Jersey. Dr. Gajewski is also affiliated with Robert Wood Johnson University Hospital Somerset. Dmand AI links Dr. Gajewski to 1 more hospital.
What medical group is Dr. Jan Gajewski part of?
Dr. Gajewski is linked to RWJBarnabas Health Medical Group. Dmand AI links Dr. Gajewski to 3 more medical groups.
Does Dr. Jan Gajewski accept Medicare?
Yes. CMS data shows Dr. Gajewski billed Medicare for 35 services in 2024, and Dr. Gajewski accepts Medicare assignment.
What is Dr. Jan Gajewski's MIPS score?
Dr. Gajewski's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does Dr. Jan Gajewski see?
CMS counts 202 Medicare patients who saw Dr. Gajewski in 2024, with an average age of 75.
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What services does Dr. Jan Gajewski bill to Medicare?
In 2024, Dr. Gajewski's most billed Medicare services were anesthesia (00910), anesthesia (01922) and anesthesia (00731).
Where did Dr. Jan Gajewski go to medical school?
Dr. Gajewski graduated from Rutgers New Jersey Medical School in 1990.
Has Dr. Jan Gajewski received payments from drug or device companies?
CMS Open Payments shows $316 in general payments to Dr. Gajewski from 8 companies from 2016 to 2025. The largest total came from Halyard Health, Inc.
How long has Dr. Jan Gajewski been practicing?
Dr. Gajewski graduated from medical school in 1990, 36 years ago.
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