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Dr. Ryan James Buck, MD
NPI1497918940PAC ID6103010913
- Medicare services, 2024
- 514
- Medicare patients, 2024
- 268
- Part D claims, 2024
- 88
- Publications
- 3
- MIPS score, 2024
- 95
- Practice address
- 251 E Huron St, Chicago, IL 60611
- Practice phone
- Call (312) 926-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Buck'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. Ryan James Buck is a hospitalist in Chicago, Illinois
Dr. Buck practices at Northwestern Memorial Hospital in Chicago, Illinois, part of Northwestern Memorial HealthCare.
Dr. Buck's NPI, 1497918940, was assigned on July 4, 2008. Dr. Buck graduated from Northwestern University Feinberg Medical School in 2007. Dr. Buck holds Illinois license 036125102.
NPI and contact details
- NPI
- 1497918940NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103010913
- NPI enumeration date
- July 4, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (312) 926-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ryan James Buck practices at Northwestern Memorial Hospital in Chicago, Illinois
Dr. Buck's primary practice is Northwestern Memorial Hospital, at 251 E Huron St, Chicago, IL 60611 in Cook County. The practice phone is (312) 926-2000.
- Northwestern Memorial Hospital251 E Huron St, Chicago, IL 60611 · Cook CountyPhone(312) 926-2000
Source: Dmand AI Affiliation Data
Dr. Ryan James Buck is affiliated with 1 site of care and 1 medical group
Dr. Buck's primary practice is Northwestern Memorial Hospital in Chicago, Illinois, part of Northwestern Memorial HealthCare. The medical group on file is Northwestern Medical Faculty Foundation.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ryan James Buck's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Buck practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Memorial Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Ryan James Buck is one of 1,321 hospitalists in Illinois
Hospitalist is Dr. Buck's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Buck is licensed in Illinois.
Specialties and state licenses
- Hospitalist, IllinoisPrimary
Hospitalists near Dr. Buck
Counts of hospitalists with a Dmand AI profile, by place and practice. Each opens the list.
1,321hospitalists in Illinois315hospitalists in Chicago80hospitalists at Northwestern Memorial Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ryan James Buck billed Medicare for 514 services in 2024
CMS data shows 514 Medicare services from Dr. Buck across 6 procedure codes in 2024, for 268 Medicare patients. Medicare paid $47,432 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024514
Medicare patients268
Paid by Medicare$47,432
Procedure codes6
Dr. Buck's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5782024: 51411%
Dr. Buck compared with the Illinois median for hospitalists, 2024
- Dr. Buck
- Illinois median
- Medicare services
- 514vs 5435% below
- Medicare patients
- 268vs 24211% above
Medians across 1,248 hospitalists in Illinois with Dmand AI profiles that report each measure.
Dr. Buck'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. Buck?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Buck and other hospitalists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ryan James Buck treated 268 Medicare patients in 2024, average age 74
CMS counts 268 Medicare patients who saw Dr. Buck in 2024. The largest group is 75 to 84, with 88 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 30% are also on Medicaid. Their average risk score is 2.81, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Buck's median patient age at 70, with 51% women.
Medicare patients, 2024268
Average age74
Average risk score2.81
Also on Medicaid30%
Dr. Buck's Medicare patients by age, 2024
Dr. Buck's Medicare patients by sex, 2024
- Women15056%
- Men11844%
Chronic conditions among Dr. Buck's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Chronic kidney disease54%
- Ischemic heart disease54%
- Heart failure46%
- Anxiety41%
- Diabetes39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Buck's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women51%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ryan James Buck wrote 88 Medicare Part D claims in 2024
In 2024, Dr. Buck wrote 88 Medicare Part D claims for 30 patients. 89% of them were for generic drugs.
Part D claims, 202488
Part D patients30
Dr. Buck's Part D claims by kind of drug, 2024
- Generic78 claims89%
- Brand-name and other10 claims11%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Ryan James Buck scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Buck for performance year 2024, reported through an alternative payment model (APM). Dr. Buck accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Buck's MIPS scores, performance year 2024
- 95of 100Final score
- 83of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Ryan James Buck has 3 publications on record
Dmand AI links 3 papers to Dr. Buck in 2018. The most frequent topics are Academic Medical Centers and Chicago. Dr. Buck's most frequent co-authors are Kelley Nash Wachsberg, Nita S. Kulkarni, MD and Matthew P. Landler, MD.
Papers3
Topics Dr. Buck writes about most
- Academic Medical Centers
- Chicago
Dr. Buck's most frequent co-authors
- Kelley Nash Wachsberg2 shared papers
- Nita S. Kulkarni, MD1 shared paper
- Matthew P. Landler, MD1 shared paper
Recent publications by Dr. Buck
Arch Intern Med
ChicagoHospitals, TeachingInterdisciplinary Communication
Academic Medical CentersBlood TransfusionChicago
See who Dr. Buck researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Buck works with, so you can find a warm path to the right hospitalists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ryan James Buck received $247 in industry payments from 2016 to 2017
CMS Open Payments shows 2 general payments to Dr. Buck from 1 drug or device company from 2016 to 2017. Food and beverage make up the largest share, 100% of the total. Celgene Corporation paid the most, $247.
General payments to Dr. Buck by program year, 2016 to 2017
Companies that paid Dr. Buck the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ryan James Buck graduated from Northwestern University Feinberg Medical School
Dr. Buck graduated from Northwestern University Feinberg Medical School in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ryan James Buck'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 (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) |
| 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) |
| 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 James Buck
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 James Buck's NPI number?
Dr. Ryan James Buck's NPI number is 1497918940. It was assigned on July 4, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Ryan James Buck?
Dr. Ryan James Buck is a hospitalist in Chicago, Illinois. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Ryan James Buck practice?
Dr. Buck practices at 251 E Huron St, Chicago, IL 60611. Dr. Buck's primary practice is Northwestern Memorial Hospital in Chicago, Illinois, part of Northwestern Memorial HealthCare.
What is Dr. Ryan James Buck's office phone number?
The practice phone on file for Dr. Buck is (312) 926-2000.
What is Dr. Ryan James Buck's medical license number?
Dr. Buck holds Illinois license 036125102.
Which hospitals is Dr. Ryan James Buck affiliated with?
Dr. Buck practices at Northwestern Memorial Hospital in Chicago, Illinois.
What medical group is Dr. Ryan James Buck part of?
Dr. Buck is linked to Northwestern Medical Faculty Foundation.
Does Dr. Ryan James Buck accept Medicare?
Yes. CMS data shows Dr. Buck billed Medicare for 514 services in 2024, and Dr. Buck accepts Medicare assignment.
What is Dr. Ryan James Buck's MIPS score?
Dr. Buck's MIPS final score for performance year 2024 is 95 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Ryan James Buck see?
CMS counts 268 Medicare patients who saw Dr. Buck in 2024, with an average age of 74.
Show 6 more questionsShow fewer questions
What services does Dr. Ryan James Buck bill to Medicare?
In 2024, Dr. Buck's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99223) and hospital inpatient care (99222).
Where did Dr. Ryan James Buck go to medical school?
Dr. Buck graduated from Northwestern University Feinberg Medical School in 2007.
Has Dr. Ryan James Buck received payments from drug or device companies?
CMS Open Payments shows $247 in general payments to Dr. Buck from 1 company from 2016 to 2017. The largest total came from Celgene Corporation.
How long has Dr. Ryan James Buck been practicing?
Dr. Buck graduated from medical school in 2007, 19 years ago.
Does Dr. Ryan James Buck do research?
Dmand AI links 3 publications to Dr. Buck.
Who does Dr. Ryan James Buck publish with?
Dr. Buck's most frequent co-authors are Kelley Nash Wachsberg (2 shared papers), Nita S. Kulkarni, MD (1 shared paper) and Matthew P. Landler, MD (1 shared paper).
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