DR. MARK HOUSTON HOOFNAGLE MD
NPI 1033344759
Surgery - Surgical Critical Care in Saint Louis, MO
About Dr. Mark Houston Hoofnagle Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK HOUSTON HOOFNAGLE MD (NPI 1033344759) is an individual surgical critical care provider in Saint Louis, Missouri, licensed in Missouri (2018021845) and active in the NPI registry since May 2009. He is enrolled in Medicare PECOS, is affiliated with Barnes Jewish Hospital, and is a graduate of University Of Virginia School Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 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
Dr. Mark Houston Hoofnagle Md 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 Reassignment
Medicare enrollment records show Mark Hoofnagle reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- Also billed through NPI 1528005642 (Missouri)
- 172 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 4
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.
Barnes Jewish Hospital
Acute Care Hospitals · Saint Louis, MOChristian Hospital Northeast
Acute Care Hospitals · Saint Louis, MOMedicare 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.
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
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 Mark Hoofnagle's NPI number?
The NPI number for Mark Hoofnagle is 1033344759. It was assigned to this individual provider in the NPPES registry on May 26, 2009.
Where is Mark Hoofnagle located?
Mark Hoofnagle practices at 1 Barnes Jewish Hospital Plz Div Surg Accs, Saint Louis, MO 63110. The listed phone number is (314) 362-5298.
What is Mark Hoofnagle's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Surgical Critical Care, with taxonomy code 2086S0102X.
Is Mark Hoofnagle enrolled in Medicare?
Yes. Mark Hoofnagle 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 Mark Hoofnagle's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Hoofnagle reassigns Medicare benefits to Washington University (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 Mark Hoofnagle's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Hoofnagle accept?
Health plans from Cox HealthPlans and UnitedHealthcare list Mark Hoofnagle 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 Mark Hoofnagle affiliated with any hospitals?
According to CMS data, Mark Hoofnagle is affiliated with Barnes Jewish Hospital and Christian Hospital Northeast.
When was this NPI record last updated?
The NPPES record for Mark Hoofnagle was last updated on July 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Mark Houston Hoofnagle, MD · NPI 1033344759
Surgical Critical Care physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since May 26, 2009.
## Identity
- **NPI:** 1033344759 (Entity type: Individual)
- **Enumerated:** May 26, 2009
- **Primary specialty:** Surgery - Surgical Critical Care · taxonomy 2086S0102X
- **State license:** 2018021845 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 BARNES JEWISH HOSPITAL PLZ, DIV SURG ACCS, Saint Louis, MO 63110-1003
- **Phone:** (314) 362-5298 · **Fax:** (888) 824-2176
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Washington University (NPI 1134169568, Saint Louis, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Virginia School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** July 6, 2026
- **Other identifiers:** Medicaid 200057492 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1033344759) · Data from the CMS NPPES public registry.