SANTIAGO VILLARREAL M.D.
NPI 1225035199
Internal Medicine - Nephrology in San Antonio, TX
NPI Status: Active since July 07, 2005
Contact Information
4151 CALLAGHAN RD
SUITE 103
SAN ANTONIO, TX
ZIP 78228
Phone: (210) 647-1195
Fax: (210) 521-9473
- Individual
- Male
- Years of Experience 49
- Internal Medicine
- Nephrology
- Accepts Insurance
- Accepts Medicare Approved Payment
- PECOS Enrolled
- Medicare Quality Reporting
About SANTIAGO VILLARREAL
This page provides the complete NPI Profile along with additional information for Santiago Villarreal, an internist established in San Antonio, Texas with a medical specialization in Internal Medicine, focusing in nephrology and more than 49 years of experience. The healthcare provider is registered in the NPI registry with number 1225035199 assigned on July 2005. The practitioner's primary taxonomy code is 207RN0300X with license number TX8995 (TX). The provider is registered as an individual and his NPI record was last updated 3 years ago.
- NPI
- 1225035199
- Provider Name
- SANTIAGO VILLARREAL M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 4151 CALLAGHAN RD SUITE 103 SAN ANTONIO, TX 78228
- Location Phone
- (210) 647-1195
- Location Fax
- (210) 521-9473
- Mailing Address
- 4151 CALLAGHAN RD SUITE 103 SAN ANTONIO, TX 78228
- Mailing Phone
- (210) 647-1195
- Mailing Fax
- (210) 521-9473
- Medical School Name
- OTHER
- Graduation Year
- 1977
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 07-07-2005
- Last Update Date
- 10-06-2023
- Code Navigator
An internist like Santiago Villarreal is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.
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
Internal Medicine Nephrology
- Taxonomy Code
- 207RN0300X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- TX8995
- License State
- TX
- Taxonomy Description
- An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- Choice Bronze HSA - HMO
- Choice Bronze HSA + Vision + Adult Dental - HMO
- Complete Gold - HMO
- Complete Gold + Vision + Adult Dental - HMO
- Complete Silver - HMO
- Complete Silver + Vision + Adult Dental - HMO
- Elite Gold - HMO
- Elite Gold + Vision + Adult Dental - HMO
- Everyday Bronze - HMO
- Everyday Bronze + Vision + Adult Dental - HMO
- Choice Bronze HSA (QualChoice) - POS
- Complete Gold - PPO
- Complete Gold + Vision + Adult Dental - PPO
- Connected Silver - PPO
- Connected Silver (QualChoice) - POS
- Connected Silver (QualChoice) + Vision + Adult Dental - POS
- Connected Silver (QualChoiceLife) - PPO
- Connected Silver (QualChoiceLife) + Vision + Adult Dental - PPO
- Connected Silver + Vision + Adult Dental - PPO
- Elite Bronze - PPO
- Complete Gold - EPO
- Complete Gold + Vision + Adult Dental - EPO
- Elite Bronze - EPO
- Elite Bronze + Vision + Adult Dental - EPO
- Elite Gold - EPO
- Elite Gold + Vision + Adult Dental - EPO
- Everyday Bronze - EPO
- Everyday Bronze + Vision + Adult Dental - EPO
- Focused Silver - EPO
- Focused Silver + Vision + Adult Dental - EPO
- Complete Gold - EPO
- Complete Gold + Vision + Adult Dental - EPO
- Enhanced Diabetes Care Silver with $0 Drug Options - EPO
- Enhanced Diabetes Care Silver with $0 Drug Options + Vision + Adult Dental - EPO
- Everyday Gold - EPO
- Everyday Gold + Vision + Adult Dental - EPO
- Focused Silver - EPO
- Focused Silver + Vision + Adult Dental - EPO
- Standard Gold - EPO
- Standard Gold + Vision + Adult Dental - EPO
- Elite Bronze - PPO
- Elite Bronze + Vision + Adult Dental - PPO
- Elite Gold - PPO
- Elite Gold + Vision + Adult Dental - PPO
- Enhanced Asthma/COPD Care Silver with $0 Drug Options - PPO
- Enhanced Asthma/COPD Care Silver with $0 Drug Options + Vision + Adult Dental - PPO
- Enhanced Diabetes Care Silver with $0 Drug Options - PPO
- Enhanced Diabetes Care Silver with $0 Drug Options + Vision + Adult Dental - PPO
- Everyday Bronze - PPO
- Everyday Bronze + Vision + Adult Dental - PPO
- Blue Advantage Bronze HMO? 204 - HMO
- Blue Advantage Bronze HMO? 301 - HMO
- Blue Advantage Bronze HMO? Standard - HMO
- Blue Advantage Gold HMO? 206 - HMO
- Blue Advantage Gold HMO? 603 - HMO
- Blue Advantage Gold HMO? Standard - HMO
- Blue Advantage Plus Bronze? 303 - POS
- Blue Advantage Plus Bronze? 305 - POS
- Blue Advantage Plus Bronze? Standard - POS
- Blue Advantage Plus Gold? 203 - POS
- Molina Gold Core 1640 - HMO
- Molina Gold Core 1640 Plus with Adult Dental and Vision - HMO
- Molina Gold Core 1640 Plus with Adult Vision - HMO
- Molina Gold Saver 750 - HMO
- Molina Gold Saver 750 Plus with Adult Dental and Vision - HMO
- Molina Gold Saver 750 Plus with Adult Vision - HMO
- Molina Gold Standard - HMO
- Molina Silver Core - HMO
- Molina Silver Core Plus with Adult Dental and Vision - HMO
- Molina Silver Core Plus with Adult Vision - HMO
- UHC Bronze Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care) - HMO
- UHC Bronze Essential ($0 Virtual Urgent Care) - HMO
- UHC Bronze Standard - HMO
- UHC Bronze Standard+ (Dental + Vision) - HMO
- UHC Gold Advantage ($0 Virtual Urgent Care, $8 Tier 2 Rx) - HMO
- UHC Gold Advantage+ ($0 Virtual Urgent Care, $8 Tier 2 Rx, Dental + Vision) - HMO
- UHC Gold Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, $8 Tier 2 Rx) - HMO
- UHC Gold Copay Focus+ $0 Indiv Med Ded ($0 Virtual Urgent Care, $8 Tier 2 Rx, Dental + Vision) - HMO
- UHC Gold Standard - HMO
- UHC Silver Advantage ($0 Virtual Urgent Care, $5 Tier 2 Rx) - HMO
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Medicare Participation & PECOS Enrollment Status
Santiago Villarreal is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.
Santiago 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
PECOS PAC ID: 5890707152
What is the PECOS Associate Control ID?
A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.PECOS Enrollment ID: I20080417000298
What is the Provider Enrollment ID?
The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.Accepts Medicare Assignment? Yes
What does it mean "accepts medicare assignment"?
When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.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
Provider Referred Orders for Durable Medical Equipment, Devices & Supplies
The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.
Unknown
Treatment-Treatment - Miscellaneous (RX029N)
Cyclosporine, oral, 100 mg (HCPCS:J7502)
1 DME suppliers used 12 Medicare Claims 720 Services Paid
Treatment-Treatment - Miscellaneous (RX029N)
Tacrolimus, immediate release, oral, 1 mg (HCPCS:J7507)
3 DME suppliers used 22 Medicare Claims 2250 Services Paid
Treatment-Treatment - Miscellaneous (RX029N)
Mycophenolate mofetil, oral, 250 mg (HCPCS:J7517)
3 DME suppliers used 23 Medicare Claims 3360 Services Paid
Treatment-Chemotherapy (RH012N)
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period (HCPCS:Q0511)
3 DME suppliers used 35 Medicare Claims 35 Services Paid
Treatment-Chemotherapy (RH012N)
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period (HCPCS:Q0512)
3 DME suppliers used 22 Medicare Claims 22 Services Paid
Areas of Expertise
The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.
Critical care, first 30-74 minutes
Dialysis services, 1 physician visit per month (20 years or older)
Dialysis services, 2-3 physician visits per month (20 years or older)
Dialysis services, 4 or more physician visits per month (20 years or older)
Dialysis services, per day, less than full month service (20 years or older)
Established patient office or other outpatient visit, 30-39 minutes
Follow-up hospital inpatient care per day, typically 15 minutes
Follow-up hospital inpatient care per day, typically 25 minutes
Hemodialysis procedure with physician evaluation
New patient office or other outpatient visit, 45-59 minutes
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
This service was performed 99 times for 21 patientsDialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can’t do their job. A physician visit once a month ensures your treatment is working effectively and adjusts it if necessary. This service is available for individuals aged 20 years and older.
This service was performed 13 times for 11 patientsDialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.
This service was performed 126 times for 44 patientsDialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
This service was performed 266 times for 47 patientsDialysis is a treatment that replicates some functions of healthy kidneys when they're not working properly. It helps to remove waste, salt, and excess water from your body and maintain a safe level of certain chemicals in your blood. This service, for patients aged 20 or older, is provided on a daily basis for less than a full month.
This service was performed 413 times for 15 patientsThis is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
This service was performed 51 times for 35 patientsFollow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
This service was performed 159 times for 49 patientsFollow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
This service was performed 94 times for 35 patientsHemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.
This service was performed 142 times for 32 patientsThis is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
This service was performed 16 times for 16 patientsPhysician Visit Costs
The typical physician office visit costs for Medicare beneficiaries in this area are: $31.6 for a new patient copayment and $24.26 for an established patient copayment.
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 78228 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99204
- Average New Patient Price $126.4
- Minimum New Patient Price $54.84
- Maximum New Patient Price $166.88
- Average New Patient Copayment $31.6
- Minimum New Patient Copayment $13.71
- Maximum New Patient Copayment $41.72
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99214
- Average Established Patient Price $97.05
- Minimum Established Patient Price $17.52
- Maximum Established Patient Price $136.11
- Average Established Patient Copayment $24.26
- Minimum Established Patient Copayment $4.38
- Maximum Established Patient Copayment $34.02
* 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.
Quality Reporting
The provider participated in CMS Quality Payment Program. The Quality Payment Program aims to improve population health, reduce costs and improve the care received by Medicare beneficiaries. The following quality measures meet Medicare's statistical reporting standards. Not all providers report the same information, because not all providers give the same services to patients. The quality information is just a snapshot of some the care providers give to their patients. Reporting more or less information is not a reflection of quality.
| Quality Measure | Performance | Number of Patients |
|---|---|---|
| Collection and follow-up on patient experience and satisfaction data on beneficiary engagement | Yes | N/A |
| Collection and follow-up on patient experience and satisfaction data on beneficiary engagement, including development of improvement plan. | ||
| Diabetes: Medical Attention for Nephropathy | 86% | 49 |
| The percentage of patients 18-75 years of age with diabetes who had a nephropathy screening test or evidence of nephropathy during the measurement period | ||
| Documentation of Current Medications in the Medical Record | 95% | 188 |
| Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter. This list must include ALL known prescriptions, over-the-counters, herbals, and vitamin/mineral/dietary (nutritional) supplements AND must contain the medications' name, dosage, frequency and route of administration | ||
| Engagement of New Medicaid Patients and Follow-up | Yes | N/A |
| Seeing new and follow-up Medicaid patients in a timely manner, including individuals dually eligible for Medicaid and Medicare. A timely manner is defined as within 10 business days for this activity. | ||
| Patient-Specific Education | 42% | 267 |
| The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician. | ||
| Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan | 20% | 110 |
| Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous twelve months of the current encounter Normal Parameters: Age 18 years and older BMI >= 18.5 and < 25 kg/m2 | ||
| Provide Patient Access | 42% | 267 |
| At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold certain information. | ||
| Secure Messaging | 0% | 267 |
| For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure message sent by the patient (or the patient-authorized representative) during the performance period. | ||
| Security Risk Analysis | Yes | N/A |
| Conduct or review a security risk analysis in accordance with the requirements in 45 CFR 164.308(a)(1), including addressing the security (to include encryption) of ePHI data created or maintained by certified EHR technology in accordance with requirements in 45 CFR164.312(a)(2)(iv) and 45 CFR 164.306(d)(3), and implement security updates as necessary and correct identified security deficiencies as part of the MIPS eligible clinician's risk management process. | ||
| Use of High-Risk Medications in the Elderly | 0% "Inverse Quality Measure" This is an inverse quality measure, a lower rate means the provider is rated better. | 63 |
| Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication. 2) Percentage of patients who were ordered at least two of the same high-risk medication | ||
Find Provider Hospital Affiliations - Privileges
Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.
Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Santiago Villarreal is affiliated with the following medical facilities:
| Hospital Name | Address | Phone | Hospital Type | Overall Rating |
|---|---|---|---|---|
| BAPTIST MEDICAL CENTER | 111 DALLAS STREET SAN ANTONIO, TX 78205 | (210) 297-8256 | Acute Care Hospitals | |
| METHODIST HOSPITAL | 7700 FLOYD CURL DR SAN ANTONIO, TX 78229 | (210) 575-4000 | Acute Care Hospitals |
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1225035199, we treat the final digit (9) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 51 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 5 providers are registered at the same or a nearby location.
SAN ANTONIO, TX 78228
SAN ANTONIO, TX 78228
SAN ANTONIO, TX 78228
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1225035199, enumerated as an "individual" on July 07, 2005.
The provider is located at 4151 CALLAGHAN RD SUITE 103 SAN ANTONIO, TX 78228 and the phone number is (210) 647-1195.
Internal Medicine with taxonomy code 207RN0300X and a focus in Nephrology.
The provider might be accepting Accepts: Ambetter from Arizona Complete Health, Ambetter. Please consult your insurance carrier or call the provider to verify.
Santiago Villarreal is affiliated with: BAPTIST MEDICAL CENTER and METHODIST HOSPITAL.
