Dr. Maria Kelly Walker , OD
Optometrist β’ Houston, TX
4401 Martin Luther King Blve
Houston, TX 772042020
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
Practice Location & Contact Primary Location
4401 Martin Luther King Blve
Houston, TX 772042020
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: University Of Houston System. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
New England College Of Optometry
2013
What Public CMS Data Show
Optometrist: NPPES taxonomy is a reported classification, not proof of board certification.
Open Payments general payments, program year 2025
All general payments: $9,608.58 across 30 records.
By nature of payment (3 largest of 5)
- Consulting Fee: $6,887.50 across 5 records.
- Food and Beverage: $1,220.53 across 19 records.
- Travel and Lodging: $970.55 across 4 records.
Reporting-company totals (3 largest of 6)
- Alcon Vision LLC: $8,178.74 across 14 records.
- CooperVision Inc.: $516.54 across 10 records.
- VISIONARY OPTICS LLC: $455.00 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
13 years (graduated 2013)
CMS Doctors and Clinicians data list 2013 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
NPI first issued
2011
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Walker has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Walker as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Houston and Texas
774 active clinicians are listed under Optometrist with a practice address in Houston, TX (5,035 in Texas).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Houston
0% of these 774 clinicians have the CMS telehealth indicator.
44.1% of these 774 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Industry payments (Open Payments)
Industry payments (Open Payments) decreased 72% from $33,875.84 in 2021 to $9,608.58 in 2025.
- 2021: $33,875.84
- 2022: $27,804.85
- 2023: $5,548.22
- 2024: $3,089.09
- 2025: $9,608.58
Sources: CMS Open Payments (2025), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 β December 31, 2025): 30 records totaling $9,608.58.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Alcon Vision LLC |
Consulting Fee
Cash or cash equivalent
|
TOTAL30 | General | $5,775.00 |
| Alcon Vision LLC |
Consulting Fee
Cash or cash equivalent
|
TOTAL30 | General | $550.00 |
| VISIONARY OPTICS LLC |
Gift
Cash or cash equivalent
|
β | General | $455.00 |
| Alcon Vision LLC |
Consulting Fee
Cash or cash equivalent
|
DAILIES TOTAL1 | General | $412.50 |
| Alcon Vision LLC |
Travel and Lodging
In-kind items and services
|
TOTAL30 | General | $368.61 |
| Alcon Vision LLC |
Food and Beverage
In-kind items and services
|
TOTAL30 | General | $335.24 |
| Alcon Vision LLC |
Travel and Lodging
In-kind items and services
|
TOTAL30 | General | $309.97 |
| Alcon Vision LLC |
Travel and Lodging
In-kind items and services
|
TOTAL30 | General | $241.97 |
| CooperVision Inc. |
Food and Beverage
In-kind items and services
|
Paragon CRT | General | $162.12 |
| Glaukos Corporation |
Food and Beverage
Cash or cash equivalent
|
Photrexa Viscous and Photrexa | General | $135.05 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
β | General | $117.87 |
| CooperVision Inc. |
Food and Beverage
In-kind items and services
|
Paragon CRT | General | $81.58 |
| Johnson & Johnson Vision Care, Inc. |
Consulting Fee
Cash or cash equivalent
|
Acuvue | General | $75.00 |
| CooperVision Inc. |
Consulting Fee
Cash or cash equivalent
|
Clariti Contact Lens | General | $75.00 |
| Alcon Vision LLC |
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program
Cash or cash equivalent
|
AIR OPTIX | General | $75.00 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
β | General | $69.73 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
β | General | $60.65 |
| CooperVision Inc. |
Food and Beverage
In-kind items and services
|
Paragon CRT | General | $55.44 |
| Alcon Vision LLC |
Travel and Lodging
Cash or cash equivalent
|
TOTAL30 | General | $50.00 |
| CooperVision Inc. |
Food and Beverage
In-kind items and services
|
Paragon CRT | General | $48.00 |
| CooperVision Inc. |
Food and Beverage
In-kind items and services
|
Paragon CRT | General | $35.07 |
| CooperVision Inc. |
Food and Beverage
In-kind items and services
|
Paragon CRT | General | $25.70 |
| Alcon Vision LLC |
Food and Beverage
Cash or cash equivalent
|
TOTAL30 | General | $23.74 |
| CooperVision Inc. |
Food and Beverage
In-kind items and services
|
Paragon CRT | General | $20.43 |
| Alcon Vision LLC |
Food and Beverage
In-kind items and services
|
β | General | $12.36 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2022-05-11NUCC Taxonomy Code: 152W00000X
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
NUCC Taxonomy Code: 152W00000X
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPTOMETRY
I20141015002000
TX
5193969939
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
University Of Houston System
190 Heights Blvd, Houston, TX 770073729
Phone: 7135278480
University Of Houston System
4401 Martin Luther King Blvd, Houston, TX 772042020
University Of Houston System
4401 Martin Luther King Blvd, Houston, TX 772042020
Phone: 7137432020
University Of Houston System
4849 Calhoun Rd, Houston, TX 772042020
Phone: 7137432020
University Of Houston System
4901 Calhoun Rd, Houston, TX 772042020
Phone: 7137432020
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Optometrist
Doctor of Optometry
Optometrist
Doctor of Optometry
Optometrist
Doctor of Optometry
Optometrist
Doctor of Optometry
Optometrist
Doctor of Optometry
Optometrist
Doctor of Optometry
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 4401 MARTIN LUTHER KING BLVE, HOUSTON, TX 772042020 (Tel: 7137432020)
Registered at 4401 MARTIN LUTHER KING BLVE, HOUSTON, TX 772042020 (Tel: 7137432020)
NPI status registered as active in NPPES database
Registered at 4901 CALHOUN RD, RM 2107, HOUSTON, TX 772042020 (Tel: 7137432020)
Registered at 4901 CALHOUN RD, RM 2107, HOUSTON, TX 772042020 (Tel: 7137432020)
Recorded as MARIA WALKER, OD
Optometrist (license number reported to NPPES: TX 8771T)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Optometrists in Houston
- Dr. Nicole Brassell, OD
- Dr. Sahar Mahmoodpour, OD
- Dr. Saber Eslaminejad, OD
- Dr. Sylvie El Hage, OD
- Dr. Dean Dicks, OD
- Dr. Hoa Nguyen, OD
Mailing Address
4401 Martin Luther King Blve
Houston, TX 772042020
Phone: 7137432020