DR. ALINA MERCEDES LOPEZ MD
NPI 1861719338
Hospitalist in Saint Louis, MO
About Dr. Alina Mercedes Lopez Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALINA MERCEDES LOPEZ MD (NPI 1861719338) is an individual hospitalist provider in Saint Louis, Missouri, licensed in Missouri (2019022406) and active in the NPI registry since April 2010. She is enrolled in Medicare PECOS and is a graduate of University Of Miami, Lm Miller School Of Medicine (2010).
NPPES Registry Identity
Specialties & Licenses 3
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
Dr. Alina Mercedes Lopez 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
2Medicare enrollment records show Alina Lopez reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 628 clinicians in this Medicare group
Saint Louis, MO 63108
- Reassigned Medicare billing, Illinois enrollment
- 530 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63110 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.
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 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
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 Alina Lopez's NPI number?
The NPI number for Alina Lopez is 1861719338. It was assigned to this individual provider in the NPPES registry on April 23, 2010.
Where is Alina Lopez located?
Alina Lopez practices at 1 Childrens Pl Div Ped Hospitalist Med, Saint Louis, MO 63110. The listed phone number is (314) 454-2076.
What is Alina Lopez's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Alina Lopez enrolled in Medicare?
Yes. Alina Lopez 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 Alina Lopez's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alina Lopez reassigns Medicare benefits to 2 organizations: Washington University (Saint Louis, MO) and Washington University Physicians In Illinois, Inc (Saint Louis, MO). 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 Alina Lopez's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alina Lopez accept?
Health plans from Cox HealthPlans list Alina Lopez 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.
When was this NPI record last updated?
The NPPES record for Alina Lopez was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Dr. Alina Mercedes Lopez, MD · NPI 1861719338
Hospitalist physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since April 23, 2010.
## Identity
- **NPI:** 1861719338 (Entity type: Individual)
- **Enumerated:** April 23, 2010
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 2019022406 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 CHILDRENS PL, DIV PED HOSPITALIST MED, Saint Louis, MO 63110-1002
- **Phone:** (314) 454-2076 · **Fax:** (314) 747-8953
## 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): Washington University (NPI 1194765685, Saint Louis, MO); Washington University Physicians In Illinois, Inc (NPI 1457203135, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Miami, Lm Miller School Of Medicine, class of 2010
## Record status
- **NPPES last updated:** April 17, 2025
- **Other identifiers:** Medicaid 200070959 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1861719338) · Data from the CMS NPPES public registry.