STEVEN BAAK, MD LLC
NPI 1073999520
Internal Medicine - Rheumatology in Bridgeton, MO
About Steven Baak, Md Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEVEN BAAK, MD LLC (NPI 1073999520) is a healthcare organization registered as a rheumatology in Bridgeton, Missouri and active in the NPI registry since August 2015. The organization lists Steven W Baak, Medical Director, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Steven Baak, Md Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
3Medicare enrollment records show 3 clinicians reassign Medicare billing to Steven Baak, MD LLC, which bills Medicare for the services they deliver. Of these, 2 practice within 10 miles. They are listed nearest first.
Clinicians, nearest first (3)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Steven Baak, MD LLC's NPI number?
The NPI number for Steven Baak, MD LLC is 1073999520. It was assigned to this organization in the NPPES registry on August 7, 2015.
Where is Steven Baak, MD LLC located?
Steven Baak, MD LLC is located at 3440 De Paul Ln Suite 113, Bridgeton, MO 63044. The listed phone number is (314) 942-6464.
What is Steven Baak, MD LLC's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Steven Baak, MD LLC enrolled in Medicare?
Yes. Steven Baak, MD LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Steven Baak, MD LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians, all in Nurse Practitioner, reassign their Medicare billing to Steven Baak, MD LLC. A 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 the clinician's services. Of these, 2 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Steven Baak, MD LLC accept?
Health plans from Medica list Steven Baak, MD LLC 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 Steven Baak, MD LLC was last updated on April 18, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Steven Baak, Md Llc · NPI 1073999520
Rheumatology organization in Bridgeton, Missouri. Organization record, active in the CMS NPPES registry since August 7, 2015.
## Identity
- **NPI:** 1073999520 (Entity type: Organization)
- **Enumerated:** August 7, 2015
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **Organization subpart:** No
- **Authorized official:** Steven Baak, MEDICAL DIRECTOR
## Practice location
- **Address:** 3440 DE PAUL LN, SUITE 113, Bridgeton, MO 63044-3545
- **Phone:** (314) 942-6464 · **Fax:** (314) 492-4636
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 3 clinicians (Nurse Practitioner) reassign Medicare billing to this organization (form CMS-855R); 2 practice within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 18, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1073999520) · Data from the CMS NPPES public registry.