TASSY N. HAYDEN M.D.
NPI 1871889303
Family Medicine in Saint Louis, MO
About Tassy N. Hayden M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TASSY N. HAYDEN M.D. (NPI 1871889303) is an individual family medicine provider in Saint Louis, Missouri, licensed in Missouri (2014021718) and active in the NPI registry since June 2011. She is enrolled in Medicare PECOS, is affiliated with Cooley Dickinson Hospital Inc,the, and maintains a secondary practice location in Hillsboro.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Tassy N. Hayden 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 Tassy Hayden 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 63119
- Reassigned Medicare billing, Missouri enrollment
- 111 clinicians in this Medicare group
Hillsboro, MO 63050
- Reassigned Medicare billing, Missouri enrollment
- 7 clinicians in this Medicare group
Northampton, MA 01060
- Reassigned Medicare billing, Massachusetts enrollment
- 539 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 10
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.
Cooley Dickinson Hospital Inc,the
Acute Care Hospitals · Northampton, MAHolyoke Medical Center
Acute Care Hospitals · Holyoke, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63139 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 14
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT LOUIS, MO 63139
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 Tassy Hayden's NPI number?
The NPI number for Tassy Hayden is 1871889303. It was assigned to this individual provider in the NPPES registry on June 23, 2011.
Where is Tassy Hayden located?
Tassy Hayden practices at 2340 Hampton Ave, Saint Louis, MO 63139. The listed phone number is (314) 647-2200.
What is Tassy Hayden's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Tassy Hayden enrolled in Medicare?
Yes. Tassy Hayden 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 Tassy Hayden's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tassy Hayden reassigns Medicare benefits to 3 organizations: Total Access Urgent Care, PC (Saint Louis, MO), Jefferson County Health Department (Hillsboro, MO) and Mass General Brigham Medical Group Western Massachusetts Inc (Northampton, MA). 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 Tassy Hayden's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tassy Hayden accept?
Health plans from Anthem Blue Cross and Blue Shield list Tassy Hayden 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 Tassy Hayden affiliated with any hospitals?
According to CMS data, Tassy Hayden is affiliated with Cooley Dickinson Hospital Inc,the and Holyoke Medical Center.
When was this NPI record last updated?
The NPPES record for Tassy Hayden was last updated on May 10, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Tassy N. Hayden, M.D. · NPI 1871889303
Family Medicine physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since June 23, 2011.
## Identity
- **NPI:** 1871889303 (Entity type: Individual)
- **Enumerated:** June 23, 2011
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 2014021718 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 2340 HAMPTON AVE, Saint Louis, MO 63139-2935
- **Phone:** (314) 647-2200 · **Fax:** (314) 647-4172
## 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): Total Access Urgent Care, PC (NPI 1962684886, Saint Louis, MO); Jefferson County Health Department (NPI 1235118324, Hillsboro, MO); Mass General Brigham Medical Group Western Massachusetts Inc (NPI 1295787919, Northampton, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Washington University School Of Medicine, class of 2011
## Record status
- **NPPES last updated:** May 10, 2018
- **Other identifiers:** Other 2014021718 (MO); Medicaid 1871889303 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1871889303) · Data from the CMS NPPES public registry.