MR. WILLIAM O. HOWIE CRNA
NPI 1598774069
Nurse Anesthetist, Certified Registered in Baltimore, MD
About Mr. William O. Howie Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. WILLIAM O. HOWIE CRNA (NPI 1598774069) is an individual nurse anesthetist, certified registered in Baltimore, Maryland, licensed in Maryland (R079932) and active in the NPI registry since August 2006. He is affiliated with University Of Maryland Medical Center and is a graduate of Other (1995).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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. William O. Howie 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
2Medicare enrollment records show William Howie reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- 148 clinicians in this Medicare group
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: Shock Trauma Associates PA
- 541 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Maryland Medical Center
Acute Care Hospitals · Baltimore, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21201 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
BALTIMORE, MD 21201
BALTIMORE, MD 21201
BALTIMORE, MD 21201
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 Howie's NPI number?
The NPI number for William Howie is 1598774069. It was assigned to this individual provider in the NPPES registry on August 5, 2006.
Where is William Howie located?
William Howie practices at 22 S Greene St, Baltimore, MD 21201. The listed phone number is (410) 328-6704.
What is William Howie's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is William Howie enrolled in Medicare?
Yes. William Howie 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 William Howie's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Howie reassigns Medicare benefits to 2 organizations: University Of Maryland Medical System Corporation (Baltimore, MD) and Shock Trauma Associates, P.A. (Baltimore, MD). 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 William Howie's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is William Howie affiliated with any hospitals?
According to CMS data, William Howie is affiliated with University Of Maryland Medical Center.
When was this NPI record last updated?
The NPPES record for William Howie was last updated on May 30, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Mr. William O. Howie, CRNA · NPI 1598774069
Nurse Anesthetist, Certified Registered physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since August 5, 2006.
## Identity
- **NPI:** 1598774069 (Entity type: Individual)
- **Enumerated:** August 5, 2006
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** R079932 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 22 S GREENE ST, Baltimore, MD 21201-1544
- **Phone:** (410) 328-6704 · **Fax:** (410) 328-4124
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): University Of Maryland Medical System Corporation (NPI 1508807355, Baltimore, MD); Shock Trauma Associates, P.A. (NPI 1679512909, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1995
## Record status
- **NPPES last updated:** May 30, 2008
- **Other identifiers:** Medicaid 363521000 (MD); Medicare PIN 012M (MD); Medicare PIN P00305372 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1598774069) · Data from the CMS NPPES public registry.