Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM ALLEN CASS M.D.
NPI 1710041207
Anesthesiology in Columbia, MO

Q: What is William Cass's NPI number?

The NPI number for William Cass is 1710041207. It was assigned to this individual provider in the NPPES registry on December 20, 2006.

Q: What is William Cass's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Q: When was this NPI record last updated?

The NPPES record for William Cass was last updated on July 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since December 20, 2006PECOS Enrolled

1600 E BROADWAY, COLUMBIA, MO 65201(573) 815-8000 Get Directions Write a Review

NPPES record last updated: July 21, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About William Allen Cass M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM ALLEN CASS M.D. (NPI 1710041207) is an individual anesthesiology provider in Columbia, Missouri, licensed in Missouri (2005025929) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS, is affiliated with Boone Hospital Center, and maintains a secondary practice location in Columbia.

NPPES Registry Identity

NPI1710041207

Entity TypeIndividualMale

Primary Taxonomy207L00000X

Provider Legal NameWILLIAM ALLEN CASSCredential: M.D.

Location Address1600 E BROADWAYColumbia, MO 65201-5844

Mailing AddressPo Box 843966Kansas City, MO 64184-3966 · (573) 884-3300 · Fax (573) 884-0943

Phone(573) 815-8000

Sole ProprietorNo

Medical School CMSOtherGraduated 1985

Enumeration DateDecember 20, 2006

Last NPPES UpdateJuly 21, 2026

NPPES CertifiedJuly 21, 2026

✔ NPI 1710041207 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

License✔ Licensed in MO · 2005025929

Definition

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

1600 E BROADWAY, Columbia, MO 65201

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Secondary Practice Location 1

Location 11 Hospital DrColumbia, MO 65201-5276 · Phone (573) 882-2568 · Fax (855) 903-0985

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Kansas City, Oscar Health Maintenance Organization of Florida, Oscar Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Allen Cass M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6103861869

PECOS Enrollment IDI20051130000908

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) 64415

This procedure involves injecting a numbing agent or steroid into your arm's nerve bundle. It's done to manage pain or inflammation. The injection helps block nerve signals that cause discomfort, providing relief. It's a safe, common procedure.

28 services28 patients

Ultrasonic guidance for needle placement 76942

Ultrasonic guidance for needle placement is a technique where sound waves create images that help accurately position the needle during procedures. This method ensures precision, minimizes discomfort, and increases safety.

20 services20 patients

Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) 64447

This procedure involves injecting a numbing agent and/or steroid into a nerve in your thigh. It's done to alleviate pain or inflammation. A needle will be carefully positioned near the nerve, and the medicine will be administered.

18 services18 patients

Injection of anesthetic agent and/or steroid into other nerve or branch 64450

This procedure involves injecting an anesthetic agent or steroid into a specific nerve or its branch. The goal is to relieve pain by reducing inflammation and numbing the area. It is commonly used for chronic pain management. The process is safe and usually quick.

18 services18 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Boone Hospital Center

Acute Care Hospitals · Columbia, MO

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number260068

Location1600 E BroadwayColumbia, MO 65201 · Boone County

Emergency services Birthing friendly

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DIANA L ERION FNP-BC

Nurse Practitioner (Family)