THOMAS R WHALEN M.D.
NPI 1356364541
Obstetrics & Gynecology in Saint Louis, MO
About Thomas R Whalen M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THOMAS R WHALEN M.D. (NPI 1356364541) is an individual obstetrics & gynecology provider in Saint Louis, Missouri, licensed in Missouri (101052) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of University Of Missouri, Columbia School Of Medicine (1992).
NPPES Registry Identity
Specialties & Licenses 2
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
Thomas R Whalen M.d. 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
3Medicare enrollment records show Thomas Whalen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- Also billed through NPI 1851431738 (Missouri)
- 241 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 64 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 744 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.
Mercy Hospital St Louis
Acute Care Hospitals · Saint Louis, MOPhysician 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
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 Thomas Whalen's NPI number?
The NPI number for Thomas Whalen is 1356364541. It was assigned to this individual provider in the NPPES registry on July 26, 2006.
Where is Thomas Whalen located?
Thomas Whalen practices at 615 S New Ballas Rd, Saint Louis, MO 63141. The listed phone number is (314) 251-7498.
What is Thomas Whalen's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Thomas Whalen enrolled in Medicare?
Yes. Thomas Whalen 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 Thomas Whalen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Whalen reassigns Medicare benefits to 3 organizations: Mercy Hospitals East Communities (Saint Louis, MO), Mercy Womens Services LLC (Saint Louis, MO) and Mercy Clinic East Communities (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 Thomas Whalen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Thomas Whalen accept?
Health plans from Anthem Blue Cross and Blue Shield list Thomas Whalen 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 Thomas Whalen affiliated with any hospitals?
According to CMS data, Thomas Whalen is affiliated with Mercy Hospital St Louis.
When was this NPI record last updated?
The NPPES record for Thomas Whalen was last updated on December 14, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Thomas R Whalen, M.D. · NPI 1356364541
Obstetrics & Gynecology physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since July 26, 2006.
## Identity
- **NPI:** 1356364541 (Entity type: Individual)
- **Enumerated:** July 26, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 101052 (Missouri)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 615 S NEW BALLAS RD, Saint Louis, MO 63141-8221
- **Phone:** (314) 251-7498 · **Fax:** (314) 251-3921
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Mercy Hospitals East Communities (NPI 1427098169, Saint Louis, MO); Mercy Womens Services LLC (NPI 1629327788, Saint Louis, MO); Mercy Clinic East Communities (NPI 1043574940, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Missouri, Columbia School Of Medicine, class of 1992
## Record status
- **NPPES last updated:** December 14, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1356364541) · Data from the CMS NPPES public registry.