MELISSA ISABEL LANCASTER DO
NPI 1881919793
Emergency Medicine in Katy, TX
About Melissa Isabel Lancaster Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MELISSA ISABEL LANCASTER DO (NPI 1881919793) is an individual emergency medicine provider in Katy, Texas, licensed in Texas (P5099) and active in the NPI registry since April 2010. She is enrolled in Medicare PECOS, is affiliated with Memorial Hermann Hospital System, and is a graduate of Ohio State University College Of Medicine (2010).
NPPES Registry Identity
Specialties & Licenses 2
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
Melissa Isabel Lancaster Do 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 Melissa Lancaster reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Houston, TX 77024
- Reassigned Medicare billing, Texas enrollment
- 408 clinicians in this Medicare group
Gainesville, TX 76240
- Reassigned Medicare billing, Texas enrollment
- 1,193 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.
Memorial Hermann Hospital System
Acute Care Hospitals · Houston, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 77494 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.
KATY, TX 77494
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 Melissa Lancaster's NPI number?
The NPI number for Melissa Lancaster is 1881919793. It was assigned to this individual provider in the NPPES registry on April 2, 2010.
Where is Melissa Lancaster located?
Melissa Lancaster practices at 23900 Katy Fwy, Katy, TX 77494. The listed phone number is (281) 644-7000.
What is Melissa Lancaster's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Melissa Lancaster enrolled in Medicare?
Yes. Melissa Lancaster 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 Melissa Lancaster's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Lancaster reassigns Medicare benefits to 2 organizations: Memorial Hermann Hospital Based Physician Group (Houston, TX) and Acs Primary Care Physicians Southwest, PA (Gainesville, TX). 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 Melissa Lancaster's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Melissa Lancaster accept?
Health plans from CHRISTUS Health Plan, Oscar Health and Oscar Insurance Company list Melissa Lancaster 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 Melissa Lancaster affiliated with any hospitals?
According to CMS data, Melissa Lancaster is affiliated with Memorial Hermann Hospital System.
When was this NPI record last updated?
The NPPES record for Melissa Lancaster was last updated on September 17, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Melissa Isabel Lancaster, DO · NPI 1881919793
Emergency Medicine physician in Katy, Texas. Individual provider, active in the CMS NPPES registry since April 2, 2010.
## Identity
- **NPI:** 1881919793 (Entity type: Individual)
- **Enumerated:** April 2, 2010
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** P5099 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 23900 KATY FWY, Katy, TX 77494-1323
- **Phone:** (281) 644-7000 · **Fax:** (225) 358-3939
## 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): Memorial Hermann Hospital Based Physician Group (NPI 1295363497, Houston, TX); Acs Primary Care Physicians Southwest, PA (NPI 1538101019, Gainesville, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Ohio State University College Of Medicine, class of 2010
## Record status
- **NPPES last updated:** September 17, 2024
- **Other identifiers:** Other 8DR008 (TX); Other 1881919793 (TX); Medicaid 2106953 (LA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1881919793) · Data from the CMS NPPES public registry.