William Allen Cass, M.D.
Anesthesiology Physician · Columbia, MO
William Allen Cass, M.D. is an anesthesiology physician with a practice address in Columbia, Missouri, and NPI 1710041207, issued on Dec 20, 2006. Check the license (Missouri 2005025929, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- William Allen Cass
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 2005025929 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1600 E Broadway, Columbia, MO 65201
- Phone
- (573) 815-8000
- Enumerated
- Dec 20, 2006
- Record last updated
- Jul 21, 2026
- Medicare enrollment
- Enrolled (PECOS I20051130000908); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,153 in Missouri → Look up another NPI →
Also registered at 1600 E Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sadiat Adebiyi, APRNFamily Nurse Practitioner1811627672
- Morgan Asher, RD, LDRegistered Dietitian1700331444
- Rebekah BailFamily Nurse Practitioner1023664562
- Dana Bal, M.D.Anesthesiology Physician1053470096
- Isabella Baldacci, PA-CPhysician Assistant1396337218
- Daniel Beary, CRNACertified Registered Nurse Anesthetist1326524521
Verify William Allen Cass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2005025929Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $17.11
1 payment: food and beverage; the largest payer was Eagle Pharmaceuticals, Inc. The 17,774 providers of this specialty with any payment received $669.59 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mid-America Anesthesia Consultants PCColumbia, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Allen Cass among 1,153 anesthesiology physician records in Missouri
William Allen Cass, M.D. is one of 1,153 anesthesiology physician records with a practice address in Missouri. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1985 · median 2007 among the 718 with a school on file
- Record last updated2026 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
127 anesthesiology physician records list a practice address in Columbia
They are 127 of the 6,004 NPPES records with a practice address in Columbia, and 1,153 anesthesiology physician records in Missouri.
All 1,153 in Missouri → Every provider in Columbia → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Jeffrey Constantine, M.D.Columbia, MO 652011306824933
- Milamari Cunningham, M.D.Columbia, MO 652011740280734
- Steven Dalbec, MDColumbia, MO 652011043203094
- Charles Edwards, M.D.Columbia, MO 652011174531198
- Nilakshi Gupta, M.D.Columbia, MO 652011578501581
- Brian Hecht, M.D.Columbia, MO 652011891809323
- Garry Johnson, MDColumbia, MO 652011144285412
- Quinn Johnson, M.D.Columbia, MO 652011194765446
Common questions
What is William Allen Cass, M.D.'s NPI number?
William Allen Cass, M.D.'s National Provider Identifier (NPI) is 1710041207, issued on Dec 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Allen Cass, M.D. located?
The NPPES record lists a practice address at 1600 E Broadway, Columbia, MO, 65201. Phone: (573) 815-8000. Providers update this record themselves, so call before visiting.
How can I verify William Allen Cass, M.D.'s license?
NPPES lists Missouri license number 2005025929, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.