DORIS W CHAN D.O.
NPI 1124289053
Emergency Medicine in Houston, TX
About Doris W Chan D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DORIS W CHAN D.O. (NPI 1124289053) is an individual emergency medicine provider in Houston, Texas, licensed in Texas (P8347) and active in the NPI registry since June 2008. She is enrolled in Medicare PECOS, is affiliated with Memorial Hermann Memorial City Hospital, and is a graduate of Nova Southeastern College Of Osteo Medicine (2008).
NPPES Registry Identity
Specialties & Licenses
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
Doris W Chan D.o. 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 Doris Chan 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 Memorial City Hospital
Acute Care Hospitals · Houston, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 77024 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.
HOUSTON, TX 77024
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 Doris Chan's NPI number?
The NPI number for Doris Chan is 1124289053. It was assigned to this individual provider in the NPPES registry on June 23, 2008.
Where is Doris Chan located?
Doris Chan practices at 921 Gessner Rd Memorial Hermann Memorial City, Houston, TX 77024. The listed phone number is (713) 242-3070.
What is Doris Chan's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Doris Chan enrolled in Medicare?
Yes. Doris Chan 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 Doris Chan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Doris Chan 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 Doris Chan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Doris Chan accept?
Health plans from Blue Cross and Blue Shield of Texas and Oscar Insurance Company list Doris Chan 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 Doris Chan affiliated with any hospitals?
According to CMS data, Doris Chan is affiliated with Memorial Hermann Memorial City Hospital.
When was this NPI record last updated?
The NPPES record for Doris Chan was last updated on September 13, 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.
# Doris W Chan, D.O. · NPI 1124289053
Emergency Medicine physician in Houston, Texas. Individual provider, active in the CMS NPPES registry since June 23, 2008.
## Identity
- **NPI:** 1124289053 (Entity type: Individual)
- **Enumerated:** June 23, 2008
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** P8347 (Texas)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 921 GESSNER RD, MEMORIAL HERMANN MEMORIAL CITY, Houston, TX 77024-2501
- **Phone:** (713) 242-3070
## 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:** Nova Southeastern College Of Osteo Medicine, class of 2008
## Record status
- **NPPES last updated:** September 13, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1124289053) · Data from the CMS NPPES public registry.