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Dr. Clifford J. Appel, MD
NPI1366436065PAC ID8325947716
- Medicare services, 2024
- 355
- Medicare patients, 2024
- 223
- Part D claims, 2024
- 680
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 100 Reserve Rd, Danbury, CT 06810
- Practice phone
- Call (203) 739-7742
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nuvance Health Medical Practice CT, Inc.
Danbury, Connecticut
Find Dr. Appel'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. Clifford J. Appel is a gastroenterologist in Danbury, Connecticut
Dr. Appel practices at Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut.
Dr. Appel's NPI, 1366436065, was assigned on September 8, 2005. Dr. Appel graduated from Icahn School Of Medicine At Mount Sinai in 1980. Dr. Appel holds Connecticut license 27415.
NPI and contact details
- NPI
- 1366436065NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325947716
- NPI enumeration date
- September 8, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 739-7742
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Clifford J. Appel practices at Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut
Dr. Appel's primary practice is Nuvance Health Medical Practice CT, Inc., at 100 Reserve Rd, Danbury, CT 06810 in Western Ct County. The practice phone is (203) 739-7742.
- Nuvance Health Medical Practice CT, Inc.100 Reserve Rd, Danbury, CT 06810 · Western Ct CountyPhone(203) 739-7742
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Clifford J. Appel is affiliated with 3 sites of care and 1 medical group
Dr. Appel's primary practice is Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut. Dr. Appel is also affiliated with Northwell Danbury Hospital. The medical group on file is Danbury Medical Group. Dmand AI also links Dr. Appel to 1 more group practice or clinic, named with a free account.
Nuvance Health Medical Practice CT, Inc.Primary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Clifford J. Appel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Appel practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nuvance Health Medical Practice CT, Inc. | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Clifford J. Appel is one of 298 gastroenterologists in Connecticut
Gastroenterology is Dr. Appel's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Appel is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Appel is licensed in Connecticut.
Specialties and state licenses
- Gastroenterology, ConnecticutPrimary
Clinical focus
Dmand AI lists acid reflux, acute gastroduodenitis, chronic inflammatory bowel disease (IBD), colonoscopy, irritable bowel syndrome (IBS), peptic ulcer and upper GI endoscopy among the conditions Dr. Appel treats.
Gastroenterologists near Dr. Appel
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. Clifford J. Appel billed Medicare for 355 services in 2024
CMS data shows 355 Medicare services from Dr. Appel across 7 procedure codes in 2024, for 223 Medicare patients. Medicare paid $36,558 for them.
Medicare services, 2024355
Medicare patients223
Paid by Medicare$36,558
Procedure codes7
Dr. Appel's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2692024: 22018%
- Surgery
- 2023: 1722024: 13522%
- Other services
- 2023: 152024: 0100%
Where Dr. Appel's Medicare services took place, 2024
- In an office20959%
- In a facility14641%
Dr. Appel compared with the Connecticut median for gastroenterologists, 2024
- Dr. Appel
- Connecticut median
- Medicare services
- 355vs 361Close to median
- Medicare patients
- 223vs 25312% below
- Part D claims
- 576vs 5387% above
Medians across 284 gastroenterologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Appel'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. Appel?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Appel and other gastroenterologists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Clifford J. Appel treated 223 Medicare patients in 2024, average age 75
CMS counts 223 Medicare patients who saw Dr. Appel in 2024. The largest group is 65 to 74, with 99 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 1.20, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Appel's median patient age at 63, with 52% women.
Medicare patients, 2024223
Average age75
Average risk score1.20
Also on Medicaid17%
Dr. Appel's Medicare patients by age, 2024
Dr. Appel's Medicare patients by sex, 2024
- Women10346%
- Men12054%
Chronic conditions among Dr. Appel's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis48%
- Ischemic heart disease32%
- Anxiety27%
- Diabetes25%
- Mood disorders25%
- Chronic kidney disease22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Appel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women52%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Clifford J. Appel wrote 680 Medicare Part D claims in 2024
In 2024, Dr. Appel wrote 680 Medicare Part D claims for 259 patients. 87% of them were for generic drugs. CMS names the drug for 576 of them, across 14 drugs with 11 or more claims each, at $133,722 in total drug cost. In 2023, CMS named 548 claims across 14 drugs.
Part D claims, 2024680
Drugs named by CMS14
Total drug cost$133,722
Part D patients259
Dr. Appel's Part D claims by kind of drug, 2024
- Generic593 claims87%
- Brand-name87 claims13%
Dr. Appel'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5482024: 5765%
Drugs named by CMS: 14 in 2024, 14 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
How Dr. Clifford J. Appel takes part in Medicare
Dr. Appel accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Clifford J. Appel has 1 publication on record
Dmand AI links 1 paper to Dr. Appel.
Papers1
Recent publications by Dr. Appel
See who Dr. Appel researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Appel works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Clifford J. Appel received $1,814 in industry payments from 2016 to 2025
CMS Open Payments shows 54 general payments to Dr. Appel from 28 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Abbvie Inc. paid the most, $353.
General payments to Dr. Appel by program year, 2016 to 2025
General payments to Dr. Appel by kind, 2016 to 2025
$1.8Kin total
- Food and beverage$1,77998%
- Education$352%
Companies that paid Dr. Appel 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. Clifford J. Appel has 1 award and honors on record
Dmand AI lists 1 award for Dr. Appel, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Appel
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Clifford J. Appel graduated from Icahn School Of Medicine At Mount Sinai
Dr. Appel graduated from Icahn School Of Medicine At Mount Sinai in 1980.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Clifford J. Appel accepts plans from 6 insurance carriers
Dr. Appel is in network with 6 carriers, including Aetna, Cigna and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Aetna
- Cigna
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
Plan types Dr. Appel accepts, by number of carriers
- Medicare6
- PPO5
- HMO2
- EPO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Clifford J. Appel'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Clifford J. Appel
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. Clifford J. Appel's NPI number?
Dr. Clifford J. Appel's NPI number is 1366436065. It was assigned on September 8, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Clifford J. Appel?
Dr. Clifford J. Appel is a gastroenterologist in Danbury, Connecticut. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Clifford J. Appel practice?
Dr. Appel practices at 100 Reserve Rd, Danbury, CT 06810. Dr. Appel's primary practice is Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut. Dmand AI also links Dr. Appel to 1 group practice or clinic.
What is Dr. Clifford J. Appel's office phone number?
The practice phone on file for Dr. Appel is (203) 739-7742.
What is Dr. Clifford J. Appel's medical license number?
Dr. Appel holds Connecticut license 27415.
Which hospitals is Dr. Clifford J. Appel affiliated with?
Dr. Appel is affiliated with Northwell Danbury Hospital.
What medical group is Dr. Clifford J. Appel part of?
Dr. Appel is linked to Danbury Medical Group.
Does Dr. Clifford J. Appel accept Medicare?
Yes. CMS data shows Dr. Appel billed Medicare for 355 services in 2024, and Dr. Appel accepts Medicare assignment.
How many Medicare patients does Dr. Clifford J. Appel see?
CMS counts 223 Medicare patients who saw Dr. Appel in 2024, with an average age of 75.
Is Dr. Clifford J. Appel board certified?
Yes. Dr. Appel is board certified in gastroenterology by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Clifford J. Appel bill to Medicare?
In 2024, Dr. Appel's most billed Medicare services were office visit, established patient (99214), surgery: digestive system (45380) and surgery: digestive system (45385).
Where did Dr. Clifford J. Appel go to medical school?
Dr. Appel graduated from Icahn School Of Medicine At Mount Sinai in 1980.
What drugs does Dr. Clifford J. Appel prescribe most?
In 2024 Medicare Part D data, Dr. Appel's most prescribed drugs by claims were Pantoprazole Sodium, Famotidine and Gavilyte-C.
Has Dr. Clifford J. Appel received payments from drug or device companies?
CMS Open Payments shows $1,814 in general payments to Dr. Appel from 28 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Clifford J. Appel been practicing?
Dr. Appel graduated from medical school in 1980, 46 years ago.
Does Dr. Clifford J. Appel do research?
Dmand AI links 1 publication to Dr. Appel.
What insurance does Dr. Clifford J. Appel accept?
Dr. Appel is in network with 6 carriers, including Aetna, Cigna and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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