Gregory Wagner
- Medicare services, 2024
- 384
- Medicare patients, 2024
- 249
- Part D claims, 2024
- 187
- Hospital affiliations
- 3
- Industry payments
- $3,096
- Practice address
- 24 Hospital Ave, Danbury, CT 06810
- Practice phone
- Call (203) 739-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Gregory Wagner's professional email, personal email and mobile number
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Gregory Wagner is a gastroenterologist in Danbury, Connecticut
Gregory Wagner practices at Northwell Danbury Hospital in Danbury, Connecticut, part of Northwell Health.
Gregory Wagner's NPI, 1215342423, was assigned on June 25, 2014. Gregory Wagner graduated from Touro College of Osteopathic Medicine in 2014. Gregory Wagner holds Connecticut license 67480.
- NPI
- 1215342423NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264841600
- NPI enumeration date
- June 25, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 739-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gregory Wagner practices at Northwell Danbury Hospital in Danbury, Connecticut
Gregory Wagner's primary practice is Northwell Danbury Hospital, at 24 Hospital Ave, Danbury, CT 06810 in Fairfield County. The practice phone is (203) 739-7000.
- Northwell Danbury Hospital24 Hospital Ave, Danbury, CT 06810 · Fairfield CountyPhone(203) 739-7000
Source: Dmand AI Affiliation Data
Gregory Wagner is affiliated with 3 sites of care and 1 medical group
Gregory Wagner's primary practice is Northwell Danbury Hospital in Danbury, Connecticut, part of Northwell Health. Gregory Wagner is also affiliated with Griffin Hospital. The medical group on file is Danbury Medical Group. Dmand AI also links Gregory Wagner to 1 more hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Gregory Wagner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gregory Wagner practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwell Danbury Hospital | Available with a free account |
| +2 more affiliated sites | 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 Northwell Health and 6.2K+ hospitals, with verified contacts in the same login.
Gregory Wagner is one of 298 gastroenterologists in Connecticut
Gastroenterology is Gregory Wagner's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Gregory Wagner is licensed in Connecticut.
Specialties and state licenses
- Gastroenterology, ConnecticutPrimary
Gastroenterologists near Gregory Wagner
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
Gregory Wagner billed Medicare for 384 services in 2024
CMS data shows 384 Medicare services from Gregory Wagner across 12 procedure codes in 2024, for 249 Medicare patients. Medicare paid $38,000 for them.
Gregory Wagner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1632024: 26663%
- Surgery
- 2023: 1092024: 1188%
Where Gregory Wagner's Medicare services took place, 2024
- In an office9023%
- In a facility29477%
Gregory Wagner compared with the Connecticut median for gastroenterologists, 2024
- Gregory Wagner
- Connecticut median
- Medicare services
- 384vs 3616% above
- Medicare patients
- 249vs 253Close to median
- Part D claims
- 86vs 53884% below
Medians across 284 gastroenterologists in Connecticut with Dmand AI profiles that report each measure.
Gregory Wagner'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
Gregory Wagner treated 249 Medicare patients in 2024, average age 77
CMS counts 249 Medicare patients who saw Gregory Wagner in 2024. The largest group is 65 to 74, with 86 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 1.94, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Gregory Wagner's median patient age at 73, with 53% women.
Gregory Wagner's Medicare patients by age, 2024
Gregory Wagner's Medicare patients by sex, 2024
- Women13554%
- Men11446%
Chronic conditions among Gregory Wagner's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Ischemic heart disease45%
- Chronic kidney disease41%
- Mood disorders41%
- Anxiety37%
- Atrial fibrillation35%
Share of Medicare patients with each condition. A patient can have several.
Gregory Wagner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women53%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Gregory Wagner wrote 187 Medicare Part D claims in 2024
In 2024, Gregory Wagner wrote 187 Medicare Part D claims for 72 patients. 72% of them were for generic drugs. CMS names the drug for 86 of them, across 4 drugs with 11 or more claims each, at $7,647 in total drug cost. In 2023, CMS named 312 claims across 8 drugs.
Gregory Wagner's Part D claims by kind of drug, 2024
- Generic134 claims72%
- Brand-name53 claims28%
Gregory Wagner'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 Gregory Wagner's Part D claims, 2024
- Antibiotics7%13 of 187 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: 3122024: 8672%
Drugs named by CMS: 4 in 2024, 8 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
Gregory Wagner ranks in the 81st percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Gregory Wagner accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 127 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Gregory Wagner, more than 81% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Gregory Wagner ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 81st percentile127 procedures
- Colonoscopy
- 75th percentile82 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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Gregory Wagner received $3,096 in industry payments from 2021 to 2023
CMS Open Payments shows 160 general payments to Gregory Wagner from 20 drug and device companies from 2021 to 2023. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $807.
General payments to Gregory Wagner by program year, 2021 to 2023
Companies that paid Gregory Wagner the most, 2021 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Gregory Wagner graduated from Touro College of Osteopathic Medicine
Gregory Wagner graduated from Touro College of Osteopathic Medicine in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Gregory Wagner'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) |
| 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 Gregory Wagner
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gregory Wagner's NPI number?
Gregory Wagner's NPI number is 1215342423. It was assigned on June 25, 2014, and it is active in the NPI Registry.
What does Gregory Wagner specialize in?
Gregory Wagner is a gastroenterologist in Danbury, Connecticut. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Gregory Wagner practice?
Gregory Wagner practices at 24 Hospital Ave, Danbury, CT 06810. Gregory Wagner's primary practice is Northwell Danbury Hospital in Danbury, Connecticut, part of Northwell Health. Dmand AI also links Gregory Wagner to 1 hospital.
What is Gregory Wagner's office phone number?
The practice phone on file for Gregory Wagner is (203) 739-7000.
What is Gregory Wagner's medical license number?
Gregory Wagner holds Connecticut license 67480.
Which hospitals is Gregory Wagner affiliated with?
Gregory Wagner practices at Northwell Danbury Hospital in Danbury, Connecticut. Gregory Wagner is also affiliated with Griffin Hospital. Dmand AI links Gregory Wagner to 1 more hospital.
What medical group is Gregory Wagner part of?
Gregory Wagner is linked to Danbury Medical Group.
Does Gregory Wagner accept Medicare?
Yes. CMS data shows Gregory Wagner billed Medicare for 384 services in 2024, and Gregory Wagner accepts Medicare assignment.
How many Medicare patients does Gregory Wagner see?
CMS counts 249 Medicare patients who saw Gregory Wagner in 2024, with an average age of 77.
What services does Gregory Wagner bill to Medicare?
In 2024, Gregory Wagner's most billed Medicare services were hospital inpatient care (99222), surgery: digestive system (43239) and hospital inpatient care (99223).
Show 4 more questionsShow fewer questions
Where did Gregory Wagner go to medical school?
Gregory Wagner graduated from Touro College of Osteopathic Medicine in 2014.
What drugs does Gregory Wagner prescribe most?
In 2024 Medicare Part D data, Gregory Wagner's most prescribed drugs by claims were Omeprazole, Pantoprazole Sodium and Gavilyte-G.
Has Gregory Wagner received payments from drug or device companies?
CMS Open Payments shows $3,096 in general payments to Gregory Wagner from 20 companies from 2021 to 2023. The largest total came from Abbvie Inc.
How long has Gregory Wagner been practicing?
Gregory Wagner graduated from medical school in 2014, 12 years ago.
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