TAMMARA LEONE DAVIS M.D.
NPI 1386844603
Psychiatry & Neurology - Psychiatry in Greenbelt, MD
About Tammara Leone Davis M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TAMMARA LEONE DAVIS M.D. (NPI 1386844603) is an individual psychiatry provider in Greenbelt, Maryland, licensed in Maryland (D66338) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS, is affiliated with Medstar Saint Mary's Hospital, and maintains a secondary practice location in Silver Spring.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Tammara Leone Davis 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
2Medicare enrollment records show Tammara Davis reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Silver Spring, MD 20910
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 128 clinicians in this Medicare group
Jacksonville, FL 32207
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 76 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.
Medstar Saint Mary's Hospital
Acute Care Hospitals · Leonardtown, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20770 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.
GREENBELT, MD 20770
GREENBELT, MD 20770
GREENBELT, MD 20770
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 Tammara Davis's NPI number?
The NPI number for Tammara Davis is 1386844603. It was assigned to this individual provider in the NPPES registry on July 24, 2007.
Where is Tammara Davis located?
Tammara Davis practices at 7474 Greenway Center Dr Suite 730, Greenbelt, MD 20770. The listed phone number is (301) 982-3437.
What is Tammara Davis's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Tammara Davis enrolled in Medicare?
Yes. Tammara Davis 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 Tammara Davis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tammara Davis reassigns Medicare benefits to 2 organizations: Axis Healthcare Group (Silver Spring, MD) and Mccd Fl Psychiatry Services PA (Jacksonville, FL). 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 Tammara Davis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tammara Davis accept?
Health plans from Oscar Health and UnitedHealthcare list Tammara Davis 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 Tammara Davis affiliated with any hospitals?
According to CMS data, Tammara Davis is affiliated with Medstar Saint Mary's Hospital.
When was this NPI record last updated?
The NPPES record for Tammara Davis was last updated on February 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Tammara Leone Davis, M.D. · NPI 1386844603
Psychiatry physician in Greenbelt, Maryland. Individual provider, active in the CMS NPPES registry since July 24, 2007.
## Identity
- **NPI:** 1386844603 (Entity type: Individual)
- **Enumerated:** July 24, 2007
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** D66338 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 7474 GREENWAY CENTER DR, SUITE 730, Greenbelt, MD 20770-3504
- **Phone:** (301) 982-3437
## 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): Axis Healthcare Group (NPI 1326295098, Silver Spring, MD); Mccd Fl Psychiatry Services PA (NPI 1659003457, Jacksonville, FL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Tennessee, Hsc, College Of Medicine, class of 2003
## Record status
- **NPPES last updated:** February 6, 2026
- **Other identifiers:** Other 219496YAN8 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1386844603) · Data from the CMS NPPES public registry.