Dr. William N. Segal, MD
- Medicare services, 2024
- 854
- Medicare patients, 2024
- 406
- Part D claims, 2024
- 916
- Hospital affiliations
- 2
- Industry payments
- $7,171
- Practice address
- 281 Witherspoon St, Princeton, NJ 08540
- Practice phone
- Call (609) 924-6692
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Urology Surgical Practice of Princeton
Princeton, New Jersey
Find Dr. Segal'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. William N. Segal is a gastroenterologist in Princeton, New Jersey
Dr. Segal practices at Urology Surgical Practice of Princeton in Princeton, New Jersey.
Dr. Segal's NPI, 1881694974, was assigned on July 29, 2005. Dr. Segal holds New Jersey license 25MA06364000.
- NPI
- 1881694974NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0345260238
- NPI enumeration date
- July 29, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (609) 924-6692
- 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 Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William N. Segal practices at Urology Surgical Practice of Princeton in Princeton, New Jersey
Dr. Segal's primary practice is Urology Surgical Practice of Princeton, at 281 Witherspoon St, Princeton, NJ 08540 in Mercer County. The practice phone is (609) 924-6692.
- Urology Surgical Practice of Princeton281 Witherspoon St, Princeton, NJ 08540 · Mercer CountyPhone(609) 924-6692
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William N. Segal is affiliated with 6 sites of care and 3 medical groups
Dr. Segal's primary practice is Urology Surgical Practice of Princeton in Princeton, New Jersey. Dr. Segal is also affiliated with Hospital of the University of Pennsylvania. The medical group on file is Penn Heart and Vascular Center Cherry Hill. Dmand AI also links Dr. Segal to 1 more hospital, 3 group practices and clinics and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William N. Segal's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Segal practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Urology Surgical Practice of Princeton | 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. William N. Segal is one of 691 gastroenterologists in New Jersey
Gastroenterology is Dr. Segal's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Segal is licensed in New Jersey.
Specialties and state licenses
- Gastroenterology, New JerseyPrimary
Gastroenterologists near Dr. Segal
Counts of gastroenterologists 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. William N. Segal billed Medicare for 854 services in 2024
CMS data shows 854 Medicare services from Dr. Segal across 14 procedure codes in 2024, for 406 Medicare patients. Medicare paid $78,817 for them.
Dr. Segal's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5662024: 45819%
- Surgery
- 2023: 2222024: 2272%
- Other services
- 2023: 462024: 169267%
Where Dr. Segal's Medicare services took place, 2024
- In an office54864%
- In a facility30636%
Dr. Segal compared with the New Jersey median for gastroenterologists, 2024
- Dr. Segal
- New Jersey median
- Medicare services
- 854vs 68525% above
- Medicare patients
- 406vs 3758% above
- Part D claims
- 808vs 61132% above
Medians across 674 gastroenterologists in New Jersey with Dmand AI profiles that report each measure.
Dr. Segal'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Segal and other gastroenterologists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William N. Segal treated 406 Medicare patients in 2024, average age 76
CMS counts 406 Medicare patients who saw Dr. Segal in 2024. The largest group is 75 to 84, with 178 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 4% are also on Medicaid. Their average risk score is 1.18, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Segal's median patient age at 65, with 49% women.
Dr. Segal's Medicare patients by age, 2024
Dr. Segal's Medicare patients by sex, 2024
- Women22856%
- Men17844%
Chronic conditions among Dr. Segal's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis48%
- Ischemic heart disease30%
- Diabetes28%
- Anxiety25%
- Osteoporosis23%
- Mood disorders21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Segal's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women49%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William N. Segal wrote 916 Medicare Part D claims in 2024
In 2024, Dr. Segal wrote 916 Medicare Part D claims for 270 patients. 86% of them were for generic drugs. CMS names the drug for 808 of them, across 17 drugs with 11 or more claims each, at $131,833 in total drug cost. In 2023, CMS named 794 claims across 16 drugs.
Dr. Segal's Part D claims by kind of drug, 2024
- Generic790 claims86%
- Brand-name126 claims14%
Dr. Segal'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. Segal's Part D claims, 2024
- Antibiotics2%18 of 916 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: 7942024: 8082%
Drugs named by CMS: 17 in 2024, 16 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. William N. Segal ranks in the 83rd percentile for colonoscopy in Medicare
Dr. Segal accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 117 procedures of colonoscopy by Dr. Segal, more than 83% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Segal ranks in Medicare procedure volume
- Colonoscopy
- 83rd percentile117 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 71st percentile76 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. William N. Segal received $7,171 in industry payments from 2016 to 2025
CMS Open Payments shows 459 general payments to Dr. Segal from 40 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Abbvie Inc. paid the most, $2,094.
General payments to Dr. Segal by program year, 2016 to 2025
General payments to Dr. Segal by kind, 2016 to 2025
- Food and beverage$6,91296%
- Education$2594%
Companies that paid Dr. Segal the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William N. Segal'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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. William N. Segal
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. William N. Segal's NPI number?
Dr. William N. Segal's NPI number is 1881694974. It was assigned on July 29, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William N. Segal?
Dr. William N. Segal is a gastroenterologist in Princeton, New Jersey. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. William N. Segal practice?
Dr. Segal practices at 281 Witherspoon St, Princeton, NJ 08540. Dr. Segal's primary practice is Urology Surgical Practice of Princeton in Princeton, New Jersey. Dmand AI also links Dr. Segal to 1 hospital, 3 group practices and clinics and 2 medical groups.
What is Dr. William N. Segal's office phone number?
The practice phone on file for Dr. Segal is (609) 924-6692.
What is Dr. William N. Segal's medical license number?
Dr. Segal holds New Jersey license 25MA06364000.
Which hospitals is Dr. William N. Segal affiliated with?
Dr. Segal is affiliated with Hospital of the University of Pennsylvania. Dmand AI links Dr. Segal to 1 more hospital.
What medical group is Dr. William N. Segal part of?
Dr. Segal is linked to Penn Heart and Vascular Center Cherry Hill. Dmand AI links Dr. Segal to 2 more medical groups.
Does Dr. William N. Segal accept Medicare?
Yes. CMS data shows Dr. Segal billed Medicare for 854 services in 2024, and Dr. Segal accepts Medicare assignment.
How many Medicare patients does Dr. William N. Segal see?
CMS counts 406 Medicare patients who saw Dr. Segal in 2024, with an average age of 76.
What services does Dr. William N. Segal bill to Medicare?
In 2024, Dr. Segal's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and surgery: digestive system (45380).
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What drugs does Dr. William N. Segal prescribe most?
In 2024 Medicare Part D data, Dr. Segal's most prescribed drugs by claims were Pantoprazole Sodium, Omeprazole and Esomeprazole Magnesium.
Has Dr. William N. Segal received payments from drug or device companies?
CMS Open Payments shows $7,171 in general payments to Dr. Segal from 40 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. William N. Segal been practicing?
Dr. Segal graduated from medical school in 1990, 36 years ago.
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