GastroparesisParalysisEnterra Gastric Pacemaker
Dr. Joel Merrell Wittles, MD
NPI1285727693
- Medicare services, 2024
- 75
- Medicare patients, 2024
- 64
- Part D claims, 2024
- 298
- Clinical trials
- 2
- Industry payments
- $1,060
- Practice address
- 867 W Carmel Dr, Carmel, IN 46032
- Practice phone
- Call (317) 962-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
IU Health Methodist Hospital
Carmel, Indiana
Find Dr. Wittles' 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. Joel Merrell Wittles is a gastroenterologist in Carmel, Indiana
Dr. Wittles practices at IU Health Methodist Hospital in Carmel, Indiana.
Dr. Wittles' NPI, 1285727693, was assigned on September 30, 2006. Dr. Wittles holds Indiana license 01062891A.
NPI and contact details
- NPI
- 1285727693NPI Registry (opens in a new tab)
- NPI enumeration date
- September 30, 2006
- NPI status
- Active
- Practice phone
- (317) 962-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Joel Merrell Wittles practices at IU Health Methodist Hospital in Carmel, Indiana
Dr. Wittles' primary practice is IU Health Methodist Hospital, at 867 W Carmel Dr, Carmel, IN 46032 in Hamilton County. The practice phone is (317) 962-2000.
- IU Health Methodist Hospital867 W Carmel Dr, Carmel, IN 46032 · Hamilton CountyPhone(317) 962-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Joel Merrell Wittles is affiliated with 1 site of care and 1 medical group
Dr. Wittles' primary practice is IU Health Methodist Hospital in Carmel, Indiana. The medical group on file is University Medical Diagnostic Associates (UMDA).
IU Health Methodist HospitalPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Joel Merrell Wittles' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Wittles practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| IU Health Methodist Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Wittles practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Joel Merrell Wittles is one of 333 gastroenterologists in Indiana
Gastroenterology is Dr. Wittles' primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Wittles' licenses on file in 2 states: Indiana and California.
Specialties and state licenses
- Gastroenterology, IndianaPrimary
- Specialist, California
Gastroenterologists near Dr. Wittles
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. Joel Merrell Wittles billed Medicare for 75 services in 2024
CMS data shows 75 Medicare services from Dr. Wittles across 4 procedure codes in 2024, for 64 Medicare patients. Medicare paid $7,356 for them.
Medicare services, 202475
Medicare patients64
Paid by Medicare$7,356
Procedure codes4
Dr. Wittles' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1152024: 5949%
- Office and hospital visits
- 2023: 382024: 1658%
Where Dr. Wittles' Medicare services took place, 2024
- In an office1621%
- In a facility5979%
Dr. Wittles compared with the Indiana median for gastroenterologists, 2024
- Dr. Wittles
- Indiana median
- Medicare services
- 75vs 47184% below
- Medicare patients
- 64vs 30979% below
- Part D claims
- 160vs 42262% below
Medians across 330 gastroenterologists in Indiana with Dmand AI profiles that report each measure.
Dr. Wittles' 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. Wittles?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Wittles and other gastroenterologists in Indiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Joel Merrell Wittles treated 64 Medicare patients in 2024, average age 71
CMS counts 64 Medicare patients who saw Dr. Wittles in 2024. The largest group is 65 to 74, with 30 patients. 67% of them have high cholesterol, and 64% have high blood pressure. 19% are also on Medicaid. Their average risk score is 0.92, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Wittles' median patient age at 62, with 47% women.
Medicare patients, 202464
Average age71
Average risk score0.92
Also on Medicaid19%
Dr. Wittles' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Wittles' Medicare patients by sex, 2024
- Women3352%
- Men3148%
Chronic conditions among Dr. Wittles' Medicare patients, 2024
- High cholesterol67%
- High blood pressure64%
- Arthritis39%
- Anxiety30%
- Mood disorders27%
- Diabetes25%
- Depression23%
- Ischemic heart disease19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Wittles' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women47%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Joel Merrell Wittles wrote 298 Medicare Part D claims in 2024
In 2024, Dr. Wittles wrote 298 Medicare Part D claims for 68 patients. 76% of them were for generic drugs. CMS names the drug for 160 of them, across 6 drugs with 11 or more claims each, at $34,077 in total drug cost. In 2023, CMS named 224 claims across 8 drugs.
Part D claims, 2024298
Drugs named by CMS6
Total drug cost$34,077
Part D patients68
Dr. Wittles' Part D claims by kind of drug, 2024
- Generic227 claims76%
- Brand-name71 claims24%
Dr. Wittles' 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: 2242024: 16029%
Drugs named by CMS: 6 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
For MedTech and pharma teams
Find gastroenterologists like Dr. Wittles by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Joel Merrell Wittles has worked on 2 clinical trials
Dmand AI links Dr. Wittles to 2 clinical trials. Conditions studied include Gastroparesis, Paralysis and Vomiting. Indiana University sponsors the most, 2.
Conditions in Dr. Wittles' trials
- Gastroparesis
- Paralysis
- Vomiting
Recent clinical trials with Dr. Wittles
Escalating Temporary Gastric Electrical Stimulation for Severe Gastroparesis (opens in a new tab)
Terminated
GastroparesisVomiting
Sources: ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. Joel Merrell Wittles received $1,060 in industry payments from 2016 to 2019
CMS Open Payments shows 66 general payments to Dr. Wittles from 14 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 96% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $272.
General payments to Dr. Wittles by program year, 2016 to 2019
General payments to Dr. Wittles by kind, 2016 to 2019
$1.1Kin total
- Food and beverage$1,02096%
- Education$404%
Companies that paid Dr. Wittles the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Joel Merrell Wittles'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) |
| Clinical trials and co-investigators | ClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Joel Merrell Wittles
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. Joel Merrell Wittles' NPI number?
Dr. Joel Merrell Wittles' NPI number is 1285727693. It was assigned on September 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Joel Merrell Wittles?
Dr. Joel Merrell Wittles is a gastroenterologist in Carmel, Indiana. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Joel Merrell Wittles practice?
Dr. Wittles practices at 867 W Carmel Dr, Carmel, IN 46032. Dr. Wittles' primary practice is IU Health Methodist Hospital in Carmel, Indiana.
What is Dr. Joel Merrell Wittles' office phone number?
The practice phone on file for Dr. Wittles is (317) 962-2000.
What is Dr. Joel Merrell Wittles' medical license number?
Dr. Wittles holds Indiana license 01062891A, one of the licenses on file in 2 states.
Which states has Dr. Joel Merrell Wittles been licensed in?
Dmand AI has state licenses on file for Dr. Wittles in Indiana and California.
What medical group is Dr. Joel Merrell Wittles part of?
Dr. Wittles is linked to University Medical Diagnostic Associates (UMDA).
Does Dr. Joel Merrell Wittles accept Medicare?
Yes. CMS data shows Dr. Wittles billed Medicare for 75 services in 2024.
How many Medicare patients does Dr. Joel Merrell Wittles see?
CMS counts 64 Medicare patients who saw Dr. Wittles in 2024, with an average age of 71.
What services does Dr. Joel Merrell Wittles bill to Medicare?
In 2024, Dr. Wittles' most billed Medicare services were surgery: digestive system (45380), surgery: digestive system (45385) and office visit, established patient (99214).
Show 4 more questionsShow fewer questions
What drugs does Dr. Joel Merrell Wittles prescribe most?
In 2024 Medicare Part D data, Dr. Wittles' most prescribed drugs by claims were Omeprazole, Colestipol HCl and Linzess.
Has Dr. Joel Merrell Wittles received payments from drug or device companies?
CMS Open Payments shows $1,060 in general payments to Dr. Wittles from 14 companies from 2016 to 2019. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. Joel Merrell Wittles been practicing?
Dr. Wittles graduated from medical school in 1981, 45 years ago.
Does Dr. Joel Merrell Wittles do research?
Dr. Wittles has worked on 2 clinical trials.
Selling to gastroenterology practices?
See gastroenterologists in Indiana by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card