WILLIAM ARTHUR GRASS ARNP
NPI 1407854383
Nurse Practitioner - Critical Care Medicine in Creve Coeur, MO
About William Arthur Grass Arnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM ARTHUR GRASS ARNP (NPI 1407854383) is an individual critical care medicine provider in Creve Coeur, Missouri, licensed in Florida (ARNP9207097) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
William Arthur Grass Arnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Physician 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
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
SAINT LOUIS, 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 William Grass's NPI number?
The NPI number for William Grass is 1407854383. It was assigned to this individual provider in the NPPES registry on July 13, 2005.
Where is William Grass located?
William Grass practices at 10 Barnes West Dr, Creve Coeur, MO 63141. The listed phone number is (314) 996-8270.
What is William Grass's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Critical Care Medicine, with taxonomy code 363LC0200X.
Is William Grass enrolled in Medicare?
Yes. William Grass is registered in the Medicare PECOS enrollment system.
What insurance does William Grass accept?
Health plans from AvMed, Molina Healthcare and UnitedHealthcare list William Grass 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.
When was this NPI record last updated?
The NPPES record for William Grass was last updated on July 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# William Arthur Grass, ARNP · NPI 1407854383
Critical Care Medicine physician in Creve Coeur, Missouri. Individual provider, active in the CMS NPPES registry since July 13, 2005.
## Identity
- **NPI:** 1407854383 (Entity type: Individual)
- **Enumerated:** July 13, 2005
- **Primary specialty:** Nurse Practitioner - Critical Care Medicine · taxonomy 363LC0200X
- **State license:** ARNP9207097 (Florida)
- **Sole proprietor:** No
## Practice location
- **Address:** 10 BARNES WEST DR, Creve Coeur, MO 63141-6287
- **Phone:** (314) 996-8270
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
## Record status
- **NPPES last updated:** July 30, 2025
- **Other identifiers:** Other Y061EY (FL); Medicaid 308331400 (FL)
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Source: [NPI Profile](https://npiprofile.com/npi/1407854383) · Data from the CMS NPPES public registry.