Dr. Denis J. Nankervis Jr., DO
- Medicare services, 2024
- 1,147
- Medicare patients, 2024
- 552
- Part D claims, 2024
- 177
- MIPS score, 2024
- 93
- Hospital affiliations
- 2
- Practice address
- 1 Heros Way, Riverhead, NY 11901
- Practice phone
- Call (631) 548-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Nankervis' professional email, personal email and mobile number
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Dr. Denis J. Nankervis Jr. is a general surgeon in Riverhead, New York
Dr. Nankervis practices at Peconic Bay Medical Center in Riverhead, New York, part of Northwell Health.
Dr. Nankervis' NPI, 1205111655, was assigned on October 18, 2011. Dr. Nankervis graduated from Lake Erie College of Osteopathic Medicine - Seton Hill in 2011. Dr. Nankervis holds New York license 289148-1.
- NPI
- 1205111655NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5395017453
- NPI enumeration date
- October 18, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (631) 548-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Denis J. Nankervis Jr. practices at 2 locations in Riverhead, New York
Dr. Nankervis' primary practice is Peconic Bay Medical Center, at 1 Heros Way, Riverhead, NY 11901 in Suffolk County. The practice phone is (631) 548-6000. Dr. Nankervis also practices at Peconic Bay Medical Center, 1300 Roanoke Ave, Riverhead, NY 11901.
- Peconic Bay Medical CenterPrimary1 Heros Way, Riverhead, NY 11901 · Suffolk CountyPhone(631) 548-6000
- Peconic Bay Medical Center1300 Roanoke Ave, Riverhead, NY 11901 · Suffolk CountyPhone(631) 548-6000
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Denis J. Nankervis Jr. is affiliated with 5 sites of care and 1 medical group
Dr. Nankervis' primary practice is Peconic Bay Medical Center in Riverhead, New York, part of Northwell Health. Dr. Nankervis is also affiliated with South Shore University Hospital. The medical group on file is Peconic Bay Medical Group at Mattituck. Dmand AI also links Dr. Nankervis to 2 more home health agencies and 1 group practice or clinic, 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. Denis J. Nankervis Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nankervis practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Peconic Bay Medical Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Denis J. Nankervis Jr. is one of 1,604 general surgeons in New York
Surgery is Dr. Nankervis' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Nankervis is licensed in New York.
Specialties and state licenses
- Surgery, New YorkPrimary
General surgeons near Dr. Nankervis
Counts of general 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. Denis J. Nankervis Jr. billed Medicare for 1,147 services in 2024
CMS data shows 1,147 Medicare services from Dr. Nankervis across 11 procedure codes in 2024, for 552 Medicare patients. Medicare paid $122,836 for them.
Dr. Nankervis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9992024: 1,09710%
- Surgery
- 2023: 542024: 507%
Where Dr. Nankervis' Medicare services took place, 2024
- In an office42237%
- In a facility72563%
Dr. Nankervis compared with the New York median for general surgeons, 2024
- Dr. Nankervis
- New York median
- Medicare services
- 1,147vs 1547.4 times
- Medicare patients
- 552vs 1095.1 times
- Part D claims
- 145vs 246.0 times
Medians across 1,502 general surgeons in New York with Dmand AI profiles that report each measure.
Dr. Nankervis' 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. Denis J. Nankervis Jr. treated 552 Medicare patients in 2024, average age 78
CMS counts 552 Medicare patients who saw Dr. Nankervis in 2024. The largest group is 75 to 84, with 226 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 2.05, 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. Nankervis' median patient age at 68, with 46% women.
Dr. Nankervis' Medicare patients by age, 2024
Dr. Nankervis' Medicare patients by sex, 2024
- Women29153%
- Men26147%
Chronic conditions among Dr. Nankervis' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Ischemic heart disease48%
- Mood disorders43%
- Anxiety38%
- Atrial fibrillation36%
- Depression36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nankervis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women46%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Denis J. Nankervis Jr. wrote 177 Medicare Part D claims in 2024
In 2024, Dr. Nankervis wrote 177 Medicare Part D claims for 69 patients. 89% of them were for generic drugs. CMS names the drug for 145 of them, across 6 drugs with 11 or more claims each, at $17,230 in total drug cost. In 2023, CMS named 88 claims across 5 drugs.
Dr. Nankervis' Part D claims by kind of drug, 2024
- Generic157 claims89%
- Brand-name20 claims11%
Dr. Nankervis' 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. Nankervis' Part D claims, 2024
- Opioids25%44 of 177 claims
- Antibiotics32%57 of 177 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: 882024: 14565%
Drugs named by CMS: 6 in 2024, 5 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. Denis J. Nankervis Jr. scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Nankervis for performance year 2024, reported through an alternative payment model (APM). Dr. Nankervis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 43 procedures of removal of tissue by Dr. Nankervis, more than 77% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Nankervis' MIPS scores, performance year 2024
- 93of 100Final score
- 79.8of 100Quality
- 89of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Nankervis ranks in Medicare procedure volume
- Removal of tissue
- 77th percentile43 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Denis J. Nankervis Jr. received $8,911 in industry payments from 2018 to 2025
CMS Open Payments shows 54 general payments to Dr. Nankervis from 7 drug and device companies from 2018 to 2025. Education make up the largest share, 62% of the total. Intuitive Surgical, Inc. paid the most, $7,312.
General payments to Dr. Nankervis by program year, 2018 to 2025
General payments to Dr. Nankervis by kind, 2018 to 2025
- Education$5,51362%
- Food and beverage$1,83121%
- Travel and lodging$1,56618%
Companies that paid Dr. Nankervis the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Denis J. Nankervis Jr. graduated from Lake Erie College of Osteopathic Medicine - Seton Hill
Dr. Nankervis graduated from Lake Erie College of Osteopathic Medicine - Seton Hill in 2011.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Denis J. Nankervis 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 | 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) |
| 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)Clinician Public Reporting: Overall MIPS Performance (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) |
| 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. Denis J. Nankervis 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. Denis J. Nankervis Jr.'s NPI number?
Dr. Denis J. Nankervis Jr.'s NPI number is 1205111655. It was assigned on October 18, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Denis J. Nankervis Jr.?
Dr. Denis J. Nankervis Jr. is a general surgeon in Riverhead, New York. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Denis J. Nankervis Jr. practice?
Dr. Nankervis practices at 1 Heros Way, Riverhead, NY 11901. Dr. Nankervis also practices at 1300 Roanoke Ave, Riverhead, NY 11901. Dr. Nankervis' primary practice is Peconic Bay Medical Center in Riverhead, New York, part of Northwell Health. Dmand AI also links Dr. Nankervis to 2 home health agencies and 1 group practice or clinic.
What is Dr. Denis J. Nankervis Jr.'s office phone number?
The practice phone on file for Dr. Nankervis is (631) 548-6000.
What is Dr. Denis J. Nankervis Jr.'s medical license number?
Dr. Nankervis holds New York license 289148-1.
Which hospitals is Dr. Denis J. Nankervis Jr. affiliated with?
Dr. Nankervis practices at Peconic Bay Medical Center in Riverhead, New York. Dr. Nankervis is also affiliated with South Shore University Hospital.
What medical group is Dr. Denis J. Nankervis Jr. part of?
Dr. Nankervis is linked to Peconic Bay Medical Group at Mattituck.
Does Dr. Denis J. Nankervis Jr. accept Medicare?
Yes. CMS data shows Dr. Nankervis billed Medicare for 1,147 services in 2024, and Dr. Nankervis accepts Medicare assignment.
What is Dr. Denis J. Nankervis Jr.'s MIPS score?
Dr. Nankervis' MIPS final score for performance year 2024 is 93 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Denis J. Nankervis Jr. see?
CMS counts 552 Medicare patients who saw Dr. Nankervis in 2024, with an average age of 78.
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What services does Dr. Denis J. Nankervis Jr. bill to Medicare?
In 2024, Dr. Nankervis' most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99214) and hospital inpatient care (99222).
Where did Dr. Denis J. Nankervis Jr. go to medical school?
Dr. Nankervis graduated from Lake Erie College of Osteopathic Medicine - Seton Hill in 2011.
What drugs does Dr. Denis J. Nankervis Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Nankervis' most prescribed drugs by claims were Oxycodone HCl, Gabapentin and Amoxicillin-Clavulanate Potass.
Has Dr. Denis J. Nankervis Jr. received payments from drug or device companies?
CMS Open Payments shows $8,911 in general payments to Dr. Nankervis from 7 companies from 2018 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Denis J. Nankervis Jr. been practicing?
Dr. Nankervis graduated from medical school in 2011, 15 years ago.
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