HEMA IYER MD
NPI 1477654366
Psychiatry & Neurology - Psychiatry in Saint Louis, MO
About Hema Iyer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HEMA IYER MD (NPI 1477654366) is an individual psychiatry provider in Saint Louis, Missouri, licensed in Missouri (2025016131) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital South, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 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
Hema Iyer Md 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 Hema Iyer 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 63128
- Reassigned Medicare billing, Missouri enrollment
- Medicare enrollment name: St Anthonys Physician Organization Hospitalist Services Lc
- 340 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 326 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 435 clinicians in this Medicare group
Festus, MO 63028
- Reassigned Medicare billing, Missouri enrollment
- 299 clinicians in this Medicare group
Saint Joseph, MI 49085
- Reassigned Medicare billing, Michigan enrollment
- 249 clinicians in this Medicare group
Grand Rapids, MI 49548
- Reassigned Medicare billing, Michigan enrollment
- 147 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 4
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital South
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63128 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 63128
SAINT LOUIS, MO 63128
SAINT LOUIS, MO 63128
SAINT LOUIS, MO 63128
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 Hema Iyer's NPI number?
The NPI number for Hema Iyer is 1477654366. It was assigned to this individual provider in the NPPES registry on September 26, 2006.
Where is Hema Iyer located?
Hema Iyer practices at 10018 Kennerly Rd, Saint Louis, MO 63128. The listed phone number is (314) 251-6663.
What is Hema Iyer's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Hema Iyer enrolled in Medicare?
Yes. Hema Iyer 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 Hema Iyer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hema Iyer reassigns Medicare benefits to 6 organizations: St Anthonys Physician Organization Hospitalist Services, L.C. (Saint Louis, MO), Mercy Clinic Adult Hospitalists - St. Louis, LLC (Saint Louis, MO), Mercy Hospitals East Communities (Saint Louis, MO), Mercy Clinic Adult Hospitalists- Jefferson, LLC (Festus, MO), Lakeland Hospitals At Niles And St Joseph, Inc (Saint Joseph, MI) 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 Hema Iyer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Hema Iyer accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Oscar Insurance Company and Priority Health and 1 other insurer list Hema Iyer 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 Hema Iyer affiliated with any hospitals?
According to CMS data, Hema Iyer is affiliated with Mercy Hospital South.
When was this NPI record last updated?
The NPPES record for Hema Iyer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Hema Iyer, MD · NPI 1477654366
Psychiatry physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since September 26, 2006.
## Identity
- **NPI:** 1477654366 (Entity type: Individual)
- **Enumerated:** September 26, 2006
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 2025016131 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 10018 KENNERLY RD, Saint Louis, MO 63128-2106
- **Phone:** (314) 251-6663 · **Fax:** (314) 251-8716
## 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): St Anthonys Physician Organization Hospitalist Services, L.C. (NPI 1407216336, Saint Louis, MO); Mercy Clinic Adult Hospitalists - St. Louis, LLC (NPI 1841235108, Saint Louis, MO); Mercy Hospitals East Communities (NPI 1851431738, Saint Louis, MO); Mercy Clinic Adult Hospitalists- Jefferson, LLC (NPI 1083052492, Festus, MO); Lakeland Hospitals At Niles And St Joseph, Inc (NPI 1134220031, Saint Joseph, MI); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1994
## Record status
- **NPPES last updated:** July 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1477654366) · Data from the CMS NPPES public registry.