DR. TAMMY L. MARTIN M.D.
NPI 1245250331
Emergency Medicine in Ellisville, MO
About Dr. Tammy L. Martin M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TAMMY L. MARTIN M.D. (NPI 1245250331) is an individual emergency medicine provider in Ellisville, Missouri, licensed in Missouri (R9H77) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of Ohio State University College Of Medicine (1986).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 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
Dr. Tammy L. Martin 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
7Medicare enrollment records show Tammy Martin reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chesterfield, MO 63017
- Reassigned Medicare billing, Missouri enrollment
- 215 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 241 clinicians in this Medicare group
Saint Louis, MO 63128
- Reassigned Medicare billing, Missouri enrollment
- 186 clinicians in this Medicare group
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 194 clinicians in this Medicare group
Saint Louis, MO 63104
- Reassigned Medicare billing, Missouri enrollment
- 1,294 clinicians in this Medicare group
Washington, MO 63090
- Reassigned Medicare billing, Missouri enrollment
- 178 clinicians in this Medicare group
Winfield, MO 63389
- Reassigned Medicare billing, Missouri enrollment
- 229 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 3
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.
Mercy Hospital St Louis
Acute Care Hospitals · Saint Louis, MOSsm Health Saint Louis University Hospital
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63011 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 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ELLISVILLE, MO 63011
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 Tammy Martin's NPI number?
The NPI number for Tammy Martin is 1245250331. It was assigned to this individual provider in the NPPES registry on July 20, 2006.
Where is Tammy Martin located?
Tammy Martin practices at 233 Clarkson Rd, Ellisville, MO 63011. The listed phone number is (636) 256-8644.
What is Tammy Martin's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Tammy Martin enrolled in Medicare?
Yes. Tammy Martin 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 Tammy Martin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tammy Martin reassigns Medicare benefits to 7 organizations: Physician Specialists Of St Lukes LLC (Chesterfield, MO), Mercy Hospitals East Communities (Saint Louis, MO), Mercy Hospital South (Saint Louis, MO), Slh Physicians LLC (Saint Louis, MO), Ssm Health Care Group (Saint Louis, MO) and 2 more organizations, listed in the Medicare section above. 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 Tammy Martin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tammy Martin accept?
Health plans from Anthem Blue Cross and Blue Shield and Oscar Insurance Company list Tammy Martin 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 Tammy Martin affiliated with any hospitals?
According to CMS data, Tammy Martin is affiliated with Mercy Hospital St Louis and Ssm Health Saint Louis University Hospital.
When was this NPI record last updated?
The NPPES record for Tammy Martin was last updated on October 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 days 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. Tammy L. Martin, M.D. · NPI 1245250331
Emergency Medicine physician in Ellisville, Missouri. Individual provider, active in the CMS NPPES registry since July 20, 2006.
## Identity
- **NPI:** 1245250331 (Entity type: Individual)
- **Enumerated:** July 20, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** R9H77 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 233 CLARKSON RD, Ellisville, MO 63011-2219
- **Phone:** (636) 256-8644
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Physician Specialists Of St Lukes LLC (NPI 1235168410, Chesterfield, MO); Mercy Hospitals East Communities (NPI 1427098169, Saint Louis, MO); Mercy Hospital South (NPI 1568481984, Saint Louis, MO); Slh Physicians LLC (NPI 1881668051, Saint Louis, MO); Ssm Health Care Group (NPI 1306589544, Saint Louis, MO); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Ohio State University College Of Medicine, class of 1986
## Record status
- **NPPES last updated:** October 11, 2026
- **Other identifiers:** Other P00333756 (MO); Other P00700283 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1245250331) · Data from the CMS NPPES public registry.