DR. APRIL K PARKER M.D., PH.D.
NPI 1821226408
Obstetrics & Gynecology in Saint Louis, MO
About Dr. April K Parker M.d., Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. APRIL K PARKER M.D., PH.D. (NPI 1821226408) is an individual obstetrics & gynecology provider in Saint Louis, Missouri, licensed in Missouri (2009014217) and active in the NPI registry since June 2009. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of Saint Louis University School Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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. April K Parker M.d., Ph.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
6Medicare enrollment records show April Parker reassigns Medicare billing to 6 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
- 744 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 435 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 64 clinicians in this Medicare group
Swansea, IL 62226
- Reassigned Medicare billing, Illinois enrollment
- 52 clinicians in this Medicare group
Mount Vernon, IL 62864
- Reassigned Medicare billing, Illinois enrollment
- 296 clinicians in this Medicare group
Osage Beach, MO 65065
- Reassigned Medicare billing, Missouri enrollment
- 149 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 2
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, MOLake Regional Health System
Acute Care Hospitals · Osage Beach, 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
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 April Parker's NPI number?
The NPI number for April Parker is 1821226408. It was assigned to this individual provider in the NPPES registry on June 23, 2009.
Where is April Parker located?
April Parker practices at 621 S New Ballas Rd Suite 4017B, Saint Louis, MO 63141. The listed phone number is (314) 872-9192.
What is April Parker's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is April Parker enrolled in Medicare?
Yes. April Parker 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 April Parker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), April Parker reassigns Medicare benefits to 6 organizations: Mercy Clinic East Communities (Saint Louis, MO), Mercy Hospitals East Communities (Saint Louis, MO), Mercy Womens Services LLC (Saint Louis, MO), Heartland Women's Healthcare Ltd (Swansea, IL), Physician Services Corporation Of Southern Illinois Inc. (Mount Vernon, IL) and 1 more organization, 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 April Parker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does April Parker accept?
Health plans from Anthem Blue Cross and Blue Shield and UnitedHealthcare list April Parker 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 April Parker affiliated with any hospitals?
According to CMS data, April Parker is affiliated with Mercy Hospital St Louis and Lake Regional Health System.
When was this NPI record last updated?
The NPPES record for April Parker was last updated on October 27, 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.
# Dr. April K Parker, M.D., PH.D. · NPI 1821226408
Obstetrics & Gynecology physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since June 23, 2009.
## Identity
- **NPI:** 1821226408 (Entity type: Individual)
- **Enumerated:** June 23, 2009
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 2009014217 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 621 S NEW BALLAS RD, SUITE 4017B, Saint Louis, MO 63141-8232
- **Phone:** (314) 872-9192
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Mercy Clinic East Communities (NPI 1851335228, Saint Louis, MO); Mercy Hospitals East Communities (NPI 1851431738, Saint Louis, MO); Mercy Womens Services LLC (NPI 1629327788, Saint Louis, MO); Heartland Women's Healthcare Ltd (NPI 1043852932, Swansea, IL); Physician Services Corporation Of Southern Illinois Inc. (NPI 1831101807, Mount Vernon, IL); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Saint Louis University School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** October 27, 2016
- **Other identifiers:** Medicare PIN 133890249 (MO); Medicaid 1841226408 (MO); Medicare PIN 152800323 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1821226408) · Data from the CMS NPPES public registry.