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MR. MASON KIMMEL AA
NPI 1659234946
Anesthesiologist Assistant in Saint Louis, MO

Active since December 04, 2025Accepts Medicare Assignment
615 S NEW BALLAS RD, SAINT LOUIS, MO 63141(636) 386-9224(636) 386-7679 Get Directions Write a Review

NPPES record last updated: December 4, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mr. Mason Kimmel Aa NPPES

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

MR. MASON KIMMEL AA (NPI 1659234946) is an individual anesthesiologist assistant in Saint Louis, Missouri and active in the NPI registry since December 2025. He is affiliated with Mercy Hospital St Louis and is a graduate of Other (2025).

NPPES Registry Identity

NPI1659234946
Entity TypeIndividualMale
Primary Taxonomy367H00000X
Provider Legal NameMR. MASON KIMMELCredential: AA
Location Address615 S NEW BALLAS RDSaint Louis, MO 63141-8221
Mailing Address339 Consort DrBallwin, MO 63011-4439 · (636) 386-9224 · Fax (636) 200-4243
Phone(636) 386-9224
Fax(636) 386-7679
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateDecember 4, 2025
NPPES CertifiedDecember 4, 2025
✔ NPI 1659234946 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologist AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367H00000X
Definition
An individual certified by the state to perform anesthesia services under the direct supervision of an anesthesiologist. Anesthesiologist Assistants are required to have a bachelor's degree with a premed curriculum prior to entering a two-year anesthesiology assistant program, which is focused upon the delivery and maintenance of anesthesia care as well as advanced patient monitoring techniques. An Anesthesiologist Assistant must work as a member of the anesthesia care team under the direction of a qualified Anesthesiologist.
615 S NEW BALLAS RD, Saint Louis, MO 63141
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. Mason Kimmel Aa 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 ID345721189
PECOS Enrollment IDI20260219004298

Medicare Billing Reassignment

Medicare enrollment records show Mason Kimmel reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Western Anesthesiology Associates, Inc.
Same address
Anesthesiology
615 S NEW BALLAS RD, DEPT. OF ANESTHESIA
Saint Louis, MO 63141
  • Reassigned Medicare billing, Missouri enrollment
  • 309 clinicians in this Medicare group
NPI 1275646754 (636) 386-9224

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

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

Mercy Hospital St Louis

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260020
Location615 New Ballas RoadSaint Louis, MO 63141 · St. Louis 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.

MRS. PATRICIA ANN RICE APN
Nurse Practitioner (Family)
615 S NEW BALLAS RD
SAINT LOUIS, MO 63141
St. Louis County (314) 251-6339
MARY BETH WALKER FNP
Nurse Practitioner (Family)
615 S NEW BALLAS RD
SAINT LOUIS, MO 63141
St. Louis County (314) 251-6000
LOVEPREET SINGH RANDHAWA MD
Internal Medicine
615 S NEW BALLAS RD
SAINT LOUIS, MO 63141
St. Louis County (314) 251-6339
DR. CONNOR ROBERT REIS DO
Internal Medicine
615 S NEW BALLAS RD
SAINT LOUIS, MO 63141
St. Louis County (314) 251-6930
MR. SHEBY THOMAS AA-S
Anesthesiologist Assistant
615 S NEW BALLAS RD, DEPT OF ANESTHESIOLOGY
SAINT LOUIS, MO 63141
St. Louis County (636) 386-9224
JOSE L OLIVER SEGARRA
Dentist
615 S NEW BALLAS RD
SAINT LOUIS, MO 63141
St. Louis County (314) 251-6382
CAREN BIRKENKAMP PMHNP-BC
Nurse Practitioner (Psychiatric/Mental Health)
615 S NEW BALLAS RD
SAINT LOUIS, MO 63141
St. Louis County (314) 251-6000
ANAS M HASIC MD
Internal Medicine
615 S NEW BALLAS RD
SAINT LOUIS, MO 63141
St. Louis County (314) 509-5305

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mason Kimmel's NPI number?

The NPI number for Mason Kimmel is 1659234946. It was assigned to this individual provider in the NPPES registry on December 4, 2025.

Where is Mason Kimmel located?

Mason Kimmel practices at 615 S New Ballas Rd, Saint Louis, MO 63141. The listed phone number is (636) 386-9224.

What is Mason Kimmel's specialty?

The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.

Is Mason Kimmel enrolled in Medicare?

Yes. Mason Kimmel is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Mason Kimmel's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mason Kimmel reassigns Medicare benefits to Western Anesthesiology Associates, Inc. (Saint Louis, MO). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mason Kimmel's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Mason Kimmel affiliated with any hospitals?

According to CMS data, Mason Kimmel is affiliated with Mercy Hospital St Louis.

When was this NPI record last updated?

The NPPES record for Mason Kimmel was last updated on December 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.