Dr. Karl R. Bernat Jr., MD
- Medicare services, 2024
- 2,996
- Medicare patients, 2024
- 466
- Part D claims, 2024
- 8,857
- Hospital affiliations
- 2
- Industry payments
- $15
- Practice address
- 2301 Erwin Rd, Durham, NC 27705
- Practice phone
- Call (919) 684-8111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Bernat'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. Karl R. Bernat Jr. is an internist in Durham, North Carolina
Dr. Bernat practices at Duke University Hospital in Durham, North Carolina, part of Duke University.
Dr. Bernat's NPI, 1851317622, was assigned on July 14, 2006. Dr. Bernat holds North Carolina license 2013-02415.
- NPI
- 1851317622NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264476258
- NPI enumeration date
- July 14, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (919) 684-8111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Karl R. Bernat Jr. practices at Duke University Hospital in Durham, North Carolina
Dr. Bernat's primary practice is Duke University Hospital, at 2301 Erwin Rd, Durham, NC 27705 in Durham County. The practice phone is (919) 684-8111.
- Duke University Hospital2301 Erwin Rd, Durham, NC 27705 · Durham CountyPhone(919) 684-8111
Source: Dmand AI Affiliation Data
Dr. Karl R. Bernat Jr. is affiliated with 4 sites of care and 2 medical groups
Dr. Bernat's primary practice is Duke University Hospital in Durham, North Carolina, part of Duke University. Dr. Bernat is also affiliated with Duke Regional Hospital. The medical group on file is Legacy Healthcare Services. Dmand AI also links Dr. Bernat to 2 more home health agencies 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. Karl R. Bernat Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Bernat practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Duke University Hospital | 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 Duke University and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Karl R. Bernat Jr. is one of 3,705 internists in North Carolina
Internal medicine is Dr. Bernat's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Bernat is licensed in North Carolina.
Specialties and state licenses
- Internal medicine, North CarolinaPrimary
Internists near Dr. Bernat
Counts of internists 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. Karl R. Bernat Jr. billed Medicare for 2,996 services in 2024
CMS data shows 2,996 Medicare services from Dr. Bernat across 15 procedure codes in 2024, for 466 Medicare patients. Medicare paid $163,185 for them. Every service was in an office.
Dr. Bernat's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 4832024: 1,098127%
- Office and hospital visits
- 2023: 9422024: 9754%
- Tests and treatments
- 2023: 3772024: 73695%
- Lab and pathology
- 2023: 1292024: 15016%
- Imaging
- 2023: 322024: 3716%
Dr. Bernat compared with the North Carolina median for internists, 2024
- Dr. Bernat
- North Carolina median
- Medicare services
- 2,996vs 5215.8 times
- Medicare patients
- 466vs 1852.5 times
- Part D claims
- 8,158vs 27230.0 times
Medians across 3,695 internists in North Carolina with Dmand AI profiles that report each measure.
Dr. Bernat'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.
Need commercial claims for Dr. Bernat?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Bernat and other internists in North Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Karl R. Bernat Jr. treated 466 Medicare patients in 2024, average age 75
CMS counts 466 Medicare patients who saw Dr. Bernat in 2024. The largest group is 65 to 74, with 207 patients. 75% of them have high blood pressure, and 68% have high cholesterol. 3% are also on Medicaid. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Bernat's median patient age at 69, with 51% women.
Dr. Bernat's Medicare patients by age, 2024
Dr. Bernat's Medicare patients by sex, 2024
- Women23951%
- Men22749%
Chronic conditions among Dr. Bernat's Medicare patients, 2024
- High blood pressure75%
- High cholesterol68%
- Arthritis47%
- Chronic kidney disease28%
- Diabetes25%
- Mood disorders25%
- Depression23%
- Anxiety22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Bernat's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Karl R. Bernat Jr. wrote 8,857 Medicare Part D claims in 2024
In 2024, Dr. Bernat wrote 8,857 Medicare Part D claims for 753 patients. 88% of them were for generic drugs. CMS names the drug for 8,158 of them, across 115 drugs with 11 or more claims each, at $738,856 in total drug cost. In 2023, CMS named 7,899 claims across 116 drugs.
Dr. Bernat's Part D claims by kind of drug, 2024
- Generic7,761 claims88%
- Brand-name1,042 claims12%
- Other54 claims1%
Dr. Bernat'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.
Drug classes CMS tracks in Dr. Bernat's Part D claims, 2024
- Opioids1%78 of 8,857 claims
- Antibiotics1%91 of 8,857 claims
- Antipsychotics, patients 65 and over0%14 of 8,857 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: 7,8992024: 8,1583%
Drugs named by CMS: 115 in 2024, 116 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. Karl R. Bernat Jr. offers telehealth to Medicare patients
Dr. Bernat accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Bernat as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Karl R. Bernat Jr. received $15 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Bernat from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Gilead Sciences, Inc. paid the most, $15.
Companies that paid Dr. Bernat the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Karl R. Bernat Jr.'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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Karl R. Bernat Jr.
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. Karl R. Bernat Jr.'s NPI number?
Dr. Karl R. Bernat Jr.'s NPI number is 1851317622. It was assigned on July 14, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Karl R. Bernat Jr.?
Dr. Karl R. Bernat Jr. is an internist in Durham, North Carolina. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Karl R. Bernat Jr. practice?
Dr. Bernat practices at 2301 Erwin Rd, Durham, NC 27705. Dr. Bernat's primary practice is Duke University Hospital in Durham, North Carolina, part of Duke University. Dmand AI also links Dr. Bernat to 2 home health agencies and 1 medical group.
What is Dr. Karl R. Bernat Jr.'s office phone number?
The practice phone on file for Dr. Bernat is (919) 684-8111.
What is Dr. Karl R. Bernat Jr.'s medical license number?
Dr. Bernat holds North Carolina license 2013-02415.
Which hospitals is Dr. Karl R. Bernat Jr. affiliated with?
Dr. Bernat practices at Duke University Hospital in Durham, North Carolina. Dr. Bernat is also affiliated with Duke Regional Hospital.
What medical group is Dr. Karl R. Bernat Jr. part of?
Dr. Bernat is linked to Legacy Healthcare Services. Dmand AI links Dr. Bernat to 1 more medical group.
Does Dr. Karl R. Bernat Jr. accept Medicare?
Yes. CMS data shows Dr. Bernat billed Medicare for 2,996 services in 2024, and Dr. Bernat accepts Medicare assignment.
Does Dr. Karl R. Bernat Jr. offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Bernat as offering telehealth services.
How many Medicare patients does Dr. Karl R. Bernat Jr. see?
CMS counts 466 Medicare patients who saw Dr. Bernat in 2024, with an average age of 75.
Show 4 more questionsShow fewer questions
What services does Dr. Karl R. Bernat Jr. bill to Medicare?
In 2024, Dr. Bernat's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and vaccine or vaccine administration (90480).
What drugs does Dr. Karl R. Bernat Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Bernat's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Rosuvastatin Calcium.
Has Dr. Karl R. Bernat Jr. received payments from drug or device companies?
CMS Open Payments shows $15 in general payments to Dr. Bernat from 1 company from 2016 to 2016. The largest total came from Gilead Sciences, Inc.
How long has Dr. Karl R. Bernat Jr. been practicing?
Dr. Bernat graduated from medical school in 1995, 31 years ago.
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