ALEX VILLARREAL MD
NPI 1811580459
Ophthalmology in League City, TX
NPI Status: Active since February 15, 2021
Contact Information
1100 GULF FWY S STE 114
LEAGUE CITY, TX
ZIP 77573
Phone: (281) 332-3937
- Individual
- Male
- Ophthalmology
- PECOS Enrolled
About ALEX VILLARREAL
This page provides the complete NPI Profile along with additional information for Alex Villarreal, a provider established in League City, Texas with a medical specialization in Ophthalmology. The healthcare provider is registered in the NPI registry with number 1811580459 assigned on February 2021. The practitioner's primary taxonomy code is 207W00000X with license number V9735 (TX). The provider is registered as an individual and his NPI record was last updated July 2025.
- NPI
- 1811580459
- Provider Name
- ALEX VILLARREAL MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 1100 GULF FWY S STE 114 LEAGUE CITY, TX 77573
- Location Phone
- (281) 332-3937
- Mailing Address
- 2855 GRAMERCY ST STE 400 HOUSTON, TX 77025
- Mailing Phone
- (713) 668-6828
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 02-15-2021
- Last Update Date
- 07-02-2025
- Code Navigator
Ophthalmologists like Alex Villarreal specialize in diagnosing and treating eye conditions. They may perform surgeries to correct vision issues or prevent vision loss due to diseases like glaucoma. Additionally, they can provide eyeglasses, prescribe contact lenses, and offer other vision-related services.
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Ophthalmology
- Taxonomy Code
- 207W00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- V9735
- License State
- TX
- Taxonomy Description
- An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
Medicare Participation & PECOS Enrollment Status
Alex Villarreal is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes
Physician Visit Costs
The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.
For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.
The prices below reflect the costs for new and established patients in the 77573 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99204
- Average New Patient Price $131.16
- Minimum New Patient Price $57.19
- Maximum New Patient Price $173.07
- Average New Patient Copayment $32.79
- Minimum New Patient Copayment $14.29
- Maximum New Patient Copayment $43.26
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99213
- Average Established Patient Price $71.32
- Minimum Established Patient Price $18.45
- Maximum Established Patient Price $141.36
- Average Established Patient Copayment $17.83
- Minimum Established Patient Copayment $4.61
- Maximum Established Patient Copayment $35.34
* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.
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NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
| Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
| 1 | 8 | 1 | 1 | 5 | 8 | 0 | 4 | 5 | 9 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 8 | 2 | 1 | 10 | 8 | 0 | 4 | 10 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 8 + 2 + 1 + 1 + 0 + 8 + 0 + 4 + 1 + 0 + 24 = 51 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 60 - 51 = 9 | 9 | ||||||||
The NPI number 1811580459 is valid because the calculated check digit 9 using the Luhn validation algorithm matches the last digit of the original NPI number.
Other Providers at the Same Location
The following 5 providers are registered at the same or nearby location.
| NPI | Name / Type | Taxonomy | Address |
|---|---|---|---|
| 1932107497 | DR. BERNARD ALLEN MILSTEIN MD Individual | Ophthalmology | 1100 GULF FWY S STE 114 LEAGUE CITY, TX 77573 (281) 332-3937 |
| 1942344452 | DR. MILETE CLARK KLINKERMAN O.D. Individual | Optometrist | 1100 GULF FWY S STE 114 LEAGUE CITY, TX 77573 (281) 338-4497 |
| 1255994844 | CHASE MORGAN WILSON MD Individual | Ophthalmology | 1100 GULF FWY S STE 114 LEAGUE CITY, TX 77573 (281) 332-3937 |
| 1376980359 | HOUSTON OPTIC PLLC Organization | Optometrist | 1100 GULF FWY S STE 114 LEAGUE CITY, TX 77573 (281) 332-3937 |
| 1790022119 | HEA CLINIC, PA Organization | Ophthalmology | 1100 GULF FWY S STE 114 LEAGUE CITY, TX 77573 (281) 332-3937 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1811580459, enumerated in the NPI registry as an "individual" on February 15, 2021
The provider is located at 1100 Gulf Fwy S Ste 114 League City, Tx 77573 and the phone number is (281) 332-3937
The provider's speciality is Ophthalmology with taxonomy code 207W00000X
Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
Medicare beneficiaries should expect a typical cost of $131.16 with an average copayment of $32.79 for new patient appointments. Established patients should expect a typical charge of $71.32 and an average copayment of 17.83. Please review your insurance plan or contact the provider directly to determine your specific costs.
This NPI record was last updated on February 15, 2021. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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