DR. TIMOTHY KENNETH ACKERMAN MD
NPI 1245762921
Hospitalist in Saint Louis, MO
About Dr. Timothy Kenneth Ackerman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TIMOTHY KENNETH ACKERMAN MD (NPI 1245762921) is an individual hospitalist provider in Saint Louis, Missouri, licensed in Missouri (2024016240) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Barnes Jewish Hospital, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses 2
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. Timothy Kenneth Ackerman 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 Reassignments
2Medicare enrollment records show Timothy Ackerman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- Also billed through NPI 1194765685 (Missouri)
- 1,133 clinicians in this Medicare group
Saint Louis, MO 63108
- Reassigned Medicare billing, Illinois enrollment
- 530 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.
Barnes Jewish Hospital
Acute Care Hospitals · Saint Louis, MOBarnes-Jewish West County Hospital
Acute Care Hospitals · Creve Coeur, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 Timothy Ackerman's NPI number?
The NPI number for Timothy Ackerman is 1245762921. It was assigned to this individual provider in the NPPES registry on March 31, 2017.
Where is Timothy Ackerman located?
Timothy Ackerman practices at 1 Barnes Jewish Hospital Plz Div Im Hospitalist, Saint Louis, MO 63110. The listed phone number is (314) 362-1700.
What is Timothy Ackerman's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Timothy Ackerman enrolled in Medicare?
Yes. Timothy Ackerman 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 Timothy Ackerman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Ackerman reassigns Medicare benefits to 2 organizations: Washington University (Saint Louis, MO) and Washington University Physicians In Illinois, Inc (Saint Louis, MO). 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 Timothy Ackerman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Timothy Ackerman accept?
Health plans from Cox HealthPlans list Timothy Ackerman 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 Timothy Ackerman affiliated with any hospitals?
According to CMS data, Timothy Ackerman is affiliated with Barnes Jewish Hospital and Barnes-Jewish West County Hospital.
When was this NPI record last updated?
The NPPES record for Timothy Ackerman was last updated on April 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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. Timothy Kenneth Ackerman, MD · NPI 1245762921
Hospitalist physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since March 31, 2017.
## Identity
- **NPI:** 1245762921 (Entity type: Individual)
- **Enumerated:** March 31, 2017
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 2024016240 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST, Saint Louis, MO 63110-1003
- **Phone:** (314) 362-1700 · **Fax:** (314) 362-9878
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Washington University (NPI 1992746903, Saint Louis, MO); Washington University Physicians In Illinois, Inc (NPI 1457203135, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** April 15, 2025
- **Other identifiers:** Medicaid 200141195 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1245762921) · Data from the CMS NPPES public registry.