Dr. Daniel Reuben Walker, MD
- Medicare services, 2024
- 205
- Medicare patients, 2024
- 192
- MIPS score, 2024
- 80
- Hospital affiliations
- 4
- Industry payments
- $38
- Practice address
- 1 Hospital Dr, Columbia, MO 65201
- Practice phone
- Call (573) 882-4141
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Hospital (MU Health Care)
Columbia, Missouri
Find Dr. Walker'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. Daniel Reuben Walker is a blood banking and transfusion medicine physician in Columbia, Missouri
Dr. Walker practices at University Hospital (MU Health Care) in Columbia, Missouri.
Dr. Walker's NPI, 1891824272, was assigned on March 3, 2007. Dr. Walker holds Missouri license 2020023675.
- NPI
- 1891824272NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547400863
- NPI enumeration date
- March 3, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (573) 882-4141
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Daniel Reuben Walker practices at University Hospital (MU Health Care) in Columbia, Missouri
Dr. Walker's primary practice is University Hospital (MU Health Care), at 1 Hospital Dr, Columbia, MO 65201 in Boone County. The practice phone is (573) 882-4141.
- University Hospital (MU Health Care)1 Hospital Dr, Columbia, MO 65201 · Boone CountyPhone(573) 882-4141
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Daniel Reuben Walker is affiliated with 5 sites of care and 1 medical group
Dr. Walker's primary practice is University Hospital (MU Health Care) in Columbia, Missouri. Dr. Walker is also affiliated with University Hospital. The medical group on file is University of Missouri Health Care. Dmand AI also links Dr. Walker to 3 more hospitals, 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. Daniel Reuben Walker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walker practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Hospital (MU Health Care) | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Daniel Reuben Walker is one of 9 blood bankings and transfusion medicine physicians in Missouri
Blood banking and transfusion medicine is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 207ZB0001X. Dmand AI has Dr. Walker's licenses on file in 2 states: Missouri and Idaho.
Specialties and state licenses
- Blood banking and transfusion medicine, MissouriPrimary
- Anatomic pathology and clinical pathology, Idaho
Blood bankings and transfusion medicine physicians near Dr. Walker
Counts of blood bankings and transfusion medicine physicians 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. Daniel Reuben Walker billed Medicare for 205 services in 2024
CMS data shows 205 Medicare services from Dr. Walker across 3 procedure codes in 2024, for 192 Medicare patients. Medicare paid $5,338 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Walker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 4702024: 20556%
Dr. Walker'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Walker and other blood bankings and transfusion medicine physicians in Missouri.
Source: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data
Dr. Daniel Reuben Walker treated 192 Medicare patients in 2024, average age 71
CMS counts 192 Medicare patients who saw Dr. Walker in 2024. The largest group is 65 to 74, with 78 patients. 75% of them have high blood pressure, and 68% have high cholesterol. 24% are also on Medicaid. Their average risk score is 2.06, 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. Walker's median patient age at 67, with 61% women.
Dr. Walker's Medicare patients by age, 2024
Dr. Walker's Medicare patients by sex, 2024
- Women11660%
- Men7640%
Chronic conditions among Dr. Walker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol68%
- Arthritis53%
- Heart failure44%
- Anxiety40%
- Mood disorders40%
- Chronic kidney disease39%
- Depression37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Walker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women61%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Daniel Reuben Walker scored 80 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 80 out of 100 for Dr. Walker for performance year 2024, reported as part of a group. Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Walker's MIPS scores, performance year 2024
- 80of 100Final score
- 58.2of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
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. Daniel Reuben Walker received $38 in industry payments from 2022 to 2025
CMS Open Payments shows 2 general payments to Dr. Walker from 2 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 100% of the total. Ortho-Clinical Diagnostics, Inc. paid the most, $22.
General payments to Dr. Walker by program year, 2022 to 2025
Companies that paid Dr. Walker the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Daniel Reuben Walker'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) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - 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) |
| 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. Daniel Reuben Walker
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. Daniel Reuben Walker's NPI number?
Dr. Daniel Reuben Walker's NPI number is 1891824272. It was assigned on March 3, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel Reuben Walker?
Dr. Daniel Reuben Walker is a blood banking and transfusion medicine physician in Columbia, Missouri. The primary specialty in the NPI Registry is Blood Banking & Transfusion Medicine Physician (taxonomy code 207ZB0001X).
Where does Dr. Daniel Reuben Walker practice?
Dr. Walker practices at 1 Hospital Dr, Columbia, MO 65201. Dr. Walker's primary practice is University Hospital (MU Health Care) in Columbia, Missouri. Dmand AI also links Dr. Walker to 3 hospitals.
What is Dr. Daniel Reuben Walker's office phone number?
The practice phone on file for Dr. Walker is (573) 882-4141.
What is Dr. Daniel Reuben Walker's medical license number?
Dr. Walker holds Missouri license 2020023675, one of the licenses on file in 2 states.
Which states has Dr. Daniel Reuben Walker been licensed in?
Dmand AI has state licenses on file for Dr. Walker in Missouri and Idaho.
Which hospitals is Dr. Daniel Reuben Walker affiliated with?
Dr. Walker is affiliated with University Hospital. Dmand AI links Dr. Walker to 3 more hospitals.
What medical group is Dr. Daniel Reuben Walker part of?
Dr. Walker is linked to University of Missouri Health Care.
Does Dr. Daniel Reuben Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 205 services in 2024, and Dr. Walker accepts Medicare assignment.
What is Dr. Daniel Reuben Walker's MIPS score?
Dr. Walker's MIPS final score for performance year 2024 is 80 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Daniel Reuben Walker see?
CMS counts 192 Medicare patients who saw Dr. Walker in 2024, with an average age of 71.
What services does Dr. Daniel Reuben Walker bill to Medicare?
In 2024, Dr. Walker's most billed Medicare services were lab and pathology test (85396), lab and pathology test (86077) and lab and pathology test (85390).
Has Dr. Daniel Reuben Walker received payments from drug or device companies?
CMS Open Payments shows $38 in general payments to Dr. Walker from 2 companies from 2022 to 2025. The largest total came from Ortho-Clinical Diagnostics, Inc.
How long has Dr. Daniel Reuben Walker been practicing?
Dr. Walker graduated from medical school in 1999, 27 years ago.
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