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MICHAEL H RYAN MD
NPI 1407966559
Anesthesiology in Chesterfield, MO

Active since August 30, 2006PECOS Enrolled
232 S WOODS MILLS RD, CHESTERFIELD, MO 63017(314) 205-6917 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Michael H Ryan Md NPPES

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

MICHAEL H RYAN MD (NPI 1407966559) is an individual anesthesiology provider in Chesterfield, Missouri, licensed in Missouri (104661) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1407966559
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameMICHAEL H RYANCredential: MD
Location Address232 S WOODS MILLS RDChesterfield, MO 63017
Mailing Address940 West Port Plaza, Ste 270St Louis, MO 63146 · (314) 453-0600 · Fax (314) 453-0083
Phone(314) 205-6917
Sole ProprietorNo
Enumeration DateAugust 30, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1407966559 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in MO · 104661
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.
232 S WOODS MILLS RD, Chesterfield, MO 63017
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Other Identifiers 1

Medicare UPINH16670

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Michael H Ryan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

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

Viking Anesthesia Services, LLC
3.3 mi
Anesthesiology
425 N NEW BALLAS RD, SUITE 205
Creve Coeur, MO 63141
  • Reassigned Medicare billing, Missouri enrollment
  • 26 clinicians in this Medicare group
NPI 1962809244 (314) 692-8411

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

Other Providers at the Same Location NPPES

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

REBECCA RAMIREZ MD
Anesthesiology
232 S WOODS MILLS RD
CHESTERFIELD, MO 63017
St. Louis County (314) 205-6917

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 Michael Ryan's NPI number?

The NPI number for Michael Ryan is 1407966559. It was assigned to this individual provider in the NPPES registry on August 30, 2006.

Where is Michael Ryan located?

Michael Ryan practices at 232 S Woods Mills Rd, Chesterfield, MO 63017. The listed phone number is (314) 205-6917.

What is Michael Ryan's specialty?

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

Is Michael Ryan enrolled in Medicare?

Yes. Michael Ryan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Michael Ryan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael Ryan reassigns Medicare benefits to Viking Anesthesia Services, LLC (Creve Coeur, 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 Michael Ryan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Michael Ryan was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.