Dr. Ryan Robert McWilliams, MD
- Medicare services, 2024
- 346
- Medicare patients, 2024
- 239
- Part D claims, 2024
- 490
- MIPS score, 2024
- 86
- Hospital affiliations
- 4
- Practice address
- 9101 Kimmer Dr, Lone Tree, CO 80124
- Practice phone
- Call (720) 639-8946
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Peak Gastroenterology ASC LLC
Lone Tree, Colorado
Find Dr. McWilliams' professional email, personal email and mobile number
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Dr. Ryan Robert McWilliams is a gastroenterologist in Lone Tree, Colorado
Dr. McWilliams practices at Peak Gastroenterology ASC LLC in Lone Tree, Colorado.
Dr. McWilliams' NPI, 1326214727, was assigned on May 6, 2008. Dr. McWilliams graduated from University of Colorado School of Medicine, Denver in 2008. Dr. McWilliams holds Colorado license 51550.
- NPI
- 1326214727NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9830323476
- NPI enumeration date
- May 6, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (720) 639-8946
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ryan Robert McWilliams practices at Peak Gastroenterology ASC LLC in Lone Tree, Colorado
Dr. McWilliams' primary practice is Peak Gastroenterology ASC LLC, at 9101 Kimmer Dr, Lone Tree, CO 80124 in Douglas County. The practice phone is (720) 639-8946.
- Peak Gastroenterology ASC LLC9101 Kimmer Dr, Lone Tree, CO 80124 · Douglas CountyPhone(720) 639-8946
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ryan Robert McWilliams is affiliated with 5 sites of care and 2 medical groups
Dr. McWilliams' primary practice is Peak Gastroenterology ASC LLC in Lone Tree, Colorado. Dr. McWilliams is also affiliated with AdventHealth Littleton. The medical group on file is AdventHealth Transplant Institute North Billings. Dmand AI also links Dr. McWilliams to 3 more hospitals and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ryan Robert McWilliams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McWilliams practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Peak Gastroenterology ASC LLC | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ryan Robert McWilliams is one of 282 gastroenterologists in Colorado
Gastroenterology is Dr. McWilliams' primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. McWilliams is licensed in Colorado.
Specialties and state licenses
- Gastroenterology, ColoradoPrimary
Gastroenterologists near Dr. McWilliams
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. Ryan Robert McWilliams billed Medicare for 346 services in 2024
CMS data shows 346 Medicare services from Dr. McWilliams across 11 procedure codes in 2024, for 239 Medicare patients. Medicare paid $36,110 for them.
Dr. McWilliams' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 2182024: 2161%
- Office and hospital visits
- 2023: 1442024: 13010%
- Other services
- 2023: 112024: 0100%
Where Dr. McWilliams' Medicare services took place, 2024
- In an office10229%
- In a facility24471%
Dr. McWilliams compared with the Colorado median for gastroenterologists, 2024
- Dr. McWilliams
- Colorado median
- Medicare services
- 346vs 3686% below
- Medicare patients
- 239vs 2567% below
- Part D claims
- 369vs 32115% above
Medians across 280 gastroenterologists in Colorado with Dmand AI profiles that report each measure.
Dr. McWilliams' 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. McWilliams and other gastroenterologists in Colorado.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ryan Robert McWilliams treated 239 Medicare patients in 2024, average age 73
CMS counts 239 Medicare patients who saw Dr. McWilliams in 2024. The largest group is 65 to 74, with 138 patients. 75% of them have high cholesterol, and 68% have high blood pressure. 17% are also on Medicaid. Their average risk score is 1.34, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. McWilliams' median patient age at 61, with 55% women.
Dr. McWilliams' Medicare patients by age, 2024
Dr. McWilliams' Medicare patients by sex, 2024
- Women12753%
- Men11247%
Chronic conditions among Dr. McWilliams' Medicare patients, 2024
- High cholesterol75%
- High blood pressure68%
- Arthritis51%
- Mood disorders29%
- Anxiety28%
- Ischemic heart disease28%
- Depression26%
- Chronic kidney disease23%
Share of Medicare patients with each condition. A patient can have several.
Dr. McWilliams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ryan Robert McWilliams wrote 490 Medicare Part D claims in 2024
In 2024, Dr. McWilliams wrote 490 Medicare Part D claims for 266 patients. 79% of them were for generic drugs. CMS names the drug for 369 of them, across 9 drugs with 11 or more claims each, at $18,500 in total drug cost. In 2023, CMS named 409 claims across 7 drugs.
Dr. McWilliams' Part D claims by kind of drug, 2024
- Generic385 claims79%
- Brand-name105 claims21%
Dr. McWilliams' 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: 4092024: 36910%
Drugs named by CMS: 9 in 2024, 7 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. Ryan Robert McWilliams scored 86 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. McWilliams for performance year 2024, reported as part of a group. Dr. McWilliams accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 149 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. McWilliams, more than 85% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. McWilliams' MIPS scores, performance year 2024
- 86of 100Final score
- 78.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. McWilliams ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 85th percentile149 procedures
- Colonoscopy
- 75th percentile83 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
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. Ryan Robert McWilliams received $2,577 in industry payments from 2016 to 2025
CMS Open Payments shows 121 general payments to Dr. McWilliams from 27 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $820.
General payments to Dr. McWilliams by program year, 2016 to 2025
Companies that paid Dr. McWilliams 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. Ryan Robert McWilliams graduated from University of Colorado School of Medicine, Denver
Dr. McWilliams graduated from University of Colorado School of Medicine, Denver in 2008.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ryan Robert McWilliams'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 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. Ryan Robert McWilliams
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. Ryan Robert McWilliams' NPI number?
Dr. Ryan Robert McWilliams' NPI number is 1326214727. It was assigned on May 6, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Ryan Robert McWilliams?
Dr. Ryan Robert McWilliams is a gastroenterologist in Lone Tree, Colorado. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Ryan Robert McWilliams practice?
Dr. McWilliams practices at 9101 Kimmer Dr, Lone Tree, CO 80124. Dr. McWilliams' primary practice is Peak Gastroenterology ASC LLC in Lone Tree, Colorado. Dmand AI also links Dr. McWilliams to 3 hospitals and 1 medical group.
What is Dr. Ryan Robert McWilliams' office phone number?
The practice phone on file for Dr. McWilliams is (720) 639-8946.
What is Dr. Ryan Robert McWilliams' medical license number?
Dr. McWilliams holds Colorado license 51550.
Which hospitals is Dr. Ryan Robert McWilliams affiliated with?
Dr. McWilliams is affiliated with AdventHealth Littleton. Dmand AI links Dr. McWilliams to 3 more hospitals.
What medical group is Dr. Ryan Robert McWilliams part of?
Dr. McWilliams is linked to AdventHealth Transplant Institute North Billings. Dmand AI links Dr. McWilliams to 1 more medical group.
Does Dr. Ryan Robert McWilliams accept Medicare?
Yes. CMS data shows Dr. McWilliams billed Medicare for 346 services in 2024, and Dr. McWilliams accepts Medicare assignment.
What is Dr. Ryan Robert McWilliams' MIPS score?
Dr. McWilliams' MIPS final score for performance year 2024 is 86 out of 100, reported as part of a group.
How many Medicare patients does Dr. Ryan Robert McWilliams see?
CMS counts 239 Medicare patients who saw Dr. McWilliams in 2024, with an average age of 73.
Show 5 more questionsShow fewer questions
What services does Dr. Ryan Robert McWilliams bill to Medicare?
In 2024, Dr. McWilliams' most billed Medicare services were surgery: digestive system (45385), surgery: digestive system (45380) and office visit, established patient (99213).
Where did Dr. Ryan Robert McWilliams go to medical school?
Dr. McWilliams graduated from University of Colorado School of Medicine, Denver in 2008.
What drugs does Dr. Ryan Robert McWilliams prescribe most?
In 2024 Medicare Part D data, Dr. McWilliams' most prescribed drugs by claims were Pantoprazole Sodium, Sod Sulf-Potass Sulf-Mag Sulf and Omeprazole.
Has Dr. Ryan Robert McWilliams received payments from drug or device companies?
CMS Open Payments shows $2,577 in general payments to Dr. McWilliams from 27 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Ryan Robert McWilliams been practicing?
Dr. McWilliams graduated from medical school in 2008, 18 years ago.
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