Dr. William Allen Cass, MD
- Medicare services, 2024
- 84
- Medicare patients, 2024
- 76
- MIPS score, 2024
- 88
- Hospital affiliations
- 1
- Industry payments
- $1,336
- Practice address
- 1600 E Broadway, Columbia, MO 65201
- Practice phone
- Call (573) 815-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. William Allen Cass is an anesthesiologist in Columbia, Missouri
Dr. Cass practices at Boone Health in Columbia, Missouri, part of Boone County, Missouri.
Dr. Cass' NPI, 1710041207, was assigned on December 20, 2006. Dr. Cass holds Missouri license 2005025929.
- NPI
- 1710041207NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103861869
- NPI enumeration date
- December 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (573) 815-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Allen Cass practices at Boone Health in Columbia, Missouri
Dr. Cass' primary practice is Boone Health, at 1600 E Broadway, Columbia, MO 65201 in Boone County. The practice phone is (573) 815-8000.
- Boone Health1600 E Broadway, Columbia, MO 65201 · Boone CountyPhone(573) 815-8000
Source: Dmand AI Affiliation Data
Dr. William Allen Cass is affiliated with 1 site of care and 3 medical groups
Dr. Cass' primary practice is Boone Health in Columbia, Missouri, part of Boone County, Missouri. The medical group on file is OrthoMed Anesthesia. Dmand AI also links Dr. Cass to 2 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Allen Cass' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Cass practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Boone Health | Available with a free account |
| +2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Allen Cass is one of 819 anesthesiologists in Missouri
Anesthesiology is Dr. Cass' primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Cass is licensed in Missouri.
Specialties and state licenses
- Anesthesiology, MissouriPrimary
Anesthesiologists near Dr. Cass
Counts of anesthesiologists 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. William Allen Cass billed Medicare for 84 services in 2024
CMS data shows 84 Medicare services from Dr. Cass across 4 procedure codes in 2024, for 76 Medicare patients. Medicare paid $3,142 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Cass' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 122024: 64433%
- Imaging
- 2023: 02024: 20
- Anesthesia
- 2023: 422024: 0100%
- Tests and treatments
- 2023: 112024: 0100%
Dr. Cass compared with the Missouri median for anesthesiologists, 2024
- Dr. Cass
- Missouri median
- Medicare services
- 84vs 7512% above
- Medicare patients
- 76vs 14046% below
Medians across 839 anesthesiologists in Missouri with Dmand AI profiles that report each measure.
Dr. Cass' 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. Cass and other anesthesiologists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Allen Cass treated 76 Medicare patients in 2024, average age 74
CMS counts 76 Medicare patients who saw Dr. Cass in 2024. The largest group is 65 to 74, with 41 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 0.94, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Cass' median patient age at 70, with 57% women.
Dr. Cass' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Cass' Medicare patients by sex, 2024
- Women3951%
- Men3749%
Chronic conditions among Dr. Cass' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis68%
- Ischemic heart disease25%
- Cancer24%
- Diabetes22%
- Anxiety21%
- Mood disorders20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Cass' 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
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Allen Cass scored 88 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 88 out of 100 for Dr. Cass for performance year 2024, reported as part of a group. Dr. Cass accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Cass' MIPS scores, performance year 2024
- 88of 100Final score
- 86of 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. William Allen Cass received $1,336 in industry payments from 2016 to 2025
CMS Open Payments shows 52 general payments to Dr. Cass from 11 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 88% of the total. Edwards Lifesciences Corporation paid the most, $417.
General payments to Dr. Cass by program year, 2016 to 2025
General payments to Dr. Cass by kind, 2016 to 2025
- Food and beverage$1,17988%
- Travel and lodging$15712%
Companies that paid Dr. Cass the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Allen Cass'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) |
| 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. William Allen Cass
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. William Allen Cass' NPI number?
Dr. William Allen Cass' NPI number is 1710041207. It was assigned on December 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Allen Cass?
Dr. William Allen Cass is an anesthesiologist in Columbia, Missouri. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. William Allen Cass practice?
Dr. Cass practices at 1600 E Broadway, Columbia, MO 65201. Dr. Cass' primary practice is Boone Health in Columbia, Missouri, part of Boone County, Missouri. Dmand AI also links Dr. Cass to 2 medical groups.
What is Dr. William Allen Cass' office phone number?
The practice phone on file for Dr. Cass is (573) 815-8000.
What is Dr. William Allen Cass' medical license number?
Dr. Cass holds Missouri license 2005025929.
Which hospitals is Dr. William Allen Cass affiliated with?
Dr. Cass practices at Boone Health in Columbia, Missouri.
What medical group is Dr. William Allen Cass part of?
Dr. Cass is linked to OrthoMed Anesthesia. Dmand AI links Dr. Cass to 2 more medical groups.
Does Dr. William Allen Cass accept Medicare?
Yes. CMS data shows Dr. Cass billed Medicare for 84 services in 2024, and Dr. Cass accepts Medicare assignment.
What is Dr. William Allen Cass' MIPS score?
Dr. Cass' MIPS final score for performance year 2024 is 88 out of 100, reported as part of a group.
How many Medicare patients does Dr. William Allen Cass see?
CMS counts 76 Medicare patients who saw Dr. Cass in 2024, with an average age of 74.
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What services does Dr. William Allen Cass bill to Medicare?
In 2024, Dr. Cass' most billed Medicare services were surgery: brain, spine and nerves (64415), ultrasound (76942) and surgery: brain, spine and nerves (64447).
Has Dr. William Allen Cass received payments from drug or device companies?
CMS Open Payments shows $1,336 in general payments to Dr. Cass from 11 companies from 2016 to 2025. The largest total came from Edwards Lifesciences Corporation.
How long has Dr. William Allen Cass been practicing?
Dr. Cass graduated from medical school in 1985, 41 years ago.
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