MS. MARY H HOLTGREWE-SEIB CRNA
NPI 1619940707
Nurse Anesthetist, Certified Registered in Saint Louis, MO
About Ms. Mary H Holtgrewe-seib Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. MARY H HOLTGREWE-SEIB CRNA (NPI 1619940707) is an individual nurse anesthetist, certified registered in Saint Louis, Missouri, licensed in Missouri (2001012891) and active in the NPI registry since February 2006. She is affiliated with Missouri Baptist Medical Center, maintains a secondary practice location in Saint Louis, and is a graduate of Other (2000).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
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
Ms. Mary H Holtgrewe-seib Crna 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.
Medicare Billing Reassignments
8Medicare enrollment records show Mary Holtgrewe-seib reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 8 clinicians in this Medicare group
Chesterfield, MO 63017
- Reassigned Medicare billing, Missouri enrollment
- 221 clinicians in this Medicare group
Saint Louis, MO 63131
- Reassigned Medicare billing, Missouri enrollment
- 102 clinicians in this Medicare group
Saint Louis, MO 63131
- Reassigned Medicare billing, Missouri enrollment
- 69 clinicians in this Medicare group
Saint Louis, MO 63128
- Reassigned Medicare billing, Missouri enrollment
- 42 clinicians in this Medicare group
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 142 clinicians in this Medicare group
Saint Louis, MO 63136
- Reassigned Medicare billing, Missouri enrollment
- Medicare enrollment name: Midwest Anesthesia Providers Sc
- 230 clinicians in this Medicare group
Addison, TX 75001
- Reassigned Medicare billing, Missouri enrollment
- 175 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Missouri Baptist Medical Center
Acute Care Hospitals · Town And Country, MOChristian Hospital Northeast
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63141 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
CREVE COEUR, MO 63141
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
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 Mary Holtgrewe-seib's NPI number?
The NPI number for Mary Holtgrewe-seib is 1619940707. It was assigned to this individual provider in the NPPES registry on February 9, 2006.
Where is Mary Holtgrewe-seib located?
Mary Holtgrewe-seib practices at 12634 Olive Blvd, Saint Louis, MO 63141. The listed phone number is (314) 996-8378.
What is Mary Holtgrewe-seib's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Mary Holtgrewe-seib enrolled in Medicare?
Yes. Mary Holtgrewe-seib 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 organizations bill Medicare for Mary Holtgrewe-seib's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Holtgrewe-seib reassigns Medicare benefits to 8 organizations: Novamed Eye Surgery Center Of North County LLC (Saint Louis, MO), Metro-West Anesthesia Group Inc (Chesterfield, MO), Missouri Baptist Medical Center (Saint Louis, MO), Eye Anesthesia LLC (Saint Louis, MO), SW Anesthesia LLC (Saint Louis, MO) and 3 more organizations, listed in the Medicare section above. Each 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 Mary Holtgrewe-seib's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Holtgrewe-seib accept?
Health plans from Blue Cross and Blue Shield of Kansas City list Mary Holtgrewe-seib as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Mary Holtgrewe-seib affiliated with any hospitals?
According to CMS data, Mary Holtgrewe-seib is affiliated with Missouri Baptist Medical Center and Christian Hospital Northeast.
When was this NPI record last updated?
The NPPES record for Mary Holtgrewe-seib was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 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.
# Ms. Mary H Holtgrewe-Seib, CRNA · NPI 1619940707
Nurse Anesthetist, Certified Registered physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since February 9, 2006.
## Identity
- **NPI:** 1619940707 (Entity type: Individual)
- **Enumerated:** February 9, 2006
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 2001012891 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 12634 OLIVE BLVD, Saint Louis, MO 63141-6337
- **Phone:** (314) 996-8378 · **Fax:** (314) 996-8910
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 8 organizations under Medicare reassignment (form CMS-855R): Novamed Eye Surgery Center Of North County LLC (NPI 1003260100, Saint Louis, MO); Metro-West Anesthesia Group Inc (NPI 1245427335, Chesterfield, MO); Missouri Baptist Medical Center (NPI 1609658905, Saint Louis, MO); Eye Anesthesia LLC (NPI 1528334182, Saint Louis, MO); SW Anesthesia LLC (NPI 1306319769, Saint Louis, MO); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2000
## Record status
- **NPPES last updated:** September 29, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1619940707) · Data from the CMS NPPES public registry.