Dr. Cesar A. Santiago, MD
- Medicare services, 2024
- 98
- Medicare patients, 2024
- 100
- Part D claims, 2024
- 191
- Hospital affiliations
- 1
- Industry payments
- $480,205
- Practice address
- 1301 Wonder World Drive, San Marcos, TX 78666
- Practice phone
- Call (512) 753-3511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Santiago's professional email, personal email and mobile number
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Dr. Cesar A. Santiago is a colorectal surgeon in San Marcos, Texas
Dr. Santiago practices at CHRISTUS Santa Rosa Hospital - San Marcos in San Marcos, Texas, part of CHRISTUS Health.
Dr. Santiago's NPI, 1659396406, was assigned on July 13, 2006. Dr. Santiago graduated from Ponce School of Medicine in 2000. Dr. Santiago holds Florida license ME95270.
- NPI
- 1659396406NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224033758
- NPI enumeration date
- July 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (512) 753-3511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Cesar A. Santiago practices at CHRISTUS Santa Rosa Hospital - San Marcos in San Marcos, Texas
Dr. Santiago's primary practice is CHRISTUS Santa Rosa Hospital - San Marcos, at 1301 Wonder World Drive, San Marcos, TX 78666 in Hays County. The practice phone is (512) 753-3511.
- CHRISTUS Santa Rosa Hospital - San Marcos1301 Wonder World Drive, San Marcos, TX 78666 · Hays CountyPhone(512) 753-3511
Source: Dmand AI Affiliation Data
Dr. Cesar A. Santiago is affiliated with 1 site of care and 1 medical group
Dr. Santiago's primary practice is CHRISTUS Santa Rosa Hospital - San Marcos in San Marcos, Texas, part of CHRISTUS Health. The medical group on file is CHRISTUS Trinity Clinic.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Cesar A. Santiago's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Santiago practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| CHRISTUS Santa Rosa Hospital - San Marcos | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Cesar A. Santiago is one of 204 colorectal surgeons in Texas
Colon and rectal surgery is Dr. Santiago's primary specialty in the NPI Registry, under taxonomy code 208C00000X. Dmand AI has Dr. Santiago's licenses on file in 2 states: Florida and Texas.
Specialties and state licenses
- Colon and rectal surgery, FloridaPrimary
- Texas license
Colorectal surgeons near Dr. Santiago
Counts of colorectal surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Cesar A. Santiago billed Medicare for 98 services in 2024
CMS data shows 98 Medicare services from Dr. Santiago across 4 procedure codes in 2024, for 100 Medicare patients. Medicare paid $13,575 for them.
Dr. Santiago's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 952024: 7125%
- Surgery
- 2023: 252024: 278%
Where Dr. Santiago's Medicare services took place, 2024
- In an office7172%
- In a facility2728%
Dr. Santiago compared with the Texas median for colorectal surgeons, 2024
- Dr. Santiago
- Texas median
- Medicare services
- 98vs 25461% below
- Medicare patients
- 100vs 15435% below
- Part D claims
- 163vs 10260% above
Medians across 192 colorectal surgeons in Texas with Dmand AI profiles that report each measure.
Dr. Santiago's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Santiago and other colorectal surgeons in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Cesar A. Santiago treated 100 Medicare patients in 2024, average age 73
CMS counts 100 Medicare patients who saw Dr. Santiago in 2024. The largest group is 65 to 74, with 59 patients. 75% of them have high cholesterol, and 74% have high blood pressure. Their average risk score is 1.11, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Santiago's median patient age at 58, with 49% women.
Dr. Santiago's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Santiago's Medicare patients by sex, 2024
- Women5757%
- Men4343%
Chronic conditions among Dr. Santiago's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis42%
- Cancer35%
- Mood disorders31%
- Depression30%
- Anxiety29%
- Ischemic heart disease28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Santiago's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women49%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Cesar A. Santiago wrote 191 Medicare Part D claims in 2024
In 2024, Dr. Santiago wrote 191 Medicare Part D claims for 98 patients. 97% of them were for generic drugs. CMS names the drug for 163 of them, across 4 drugs with 11 or more claims each, at $1,030 in total drug cost. In 2023, CMS named 142 claims across 4 drugs.
Dr. Santiago's Part D claims by kind of drug, 2024
- Generic186 claims97%
- Brand-name and other5 claims3%
Dr. Santiago's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Santiago's Part D claims, 2024
- Opioids46%87 of 191 claims
- Antibiotics43%83 of 191 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1422024: 16315%
Drugs named by CMS: 4 in 2024, 4 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Cesar A. Santiago ranks in the 56th percentile for colonoscopy in Medicare
Dr. Santiago accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 34 procedures of colonoscopy by Dr. Santiago, more than 56% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Santiago ranks in Medicare procedure volume
- Colonoscopy
- 56th percentile34 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Cesar A. Santiago received $480,205 in industry payments from 2016 to 2025
CMS Open Payments shows 701 general payments to Dr. Santiago from 26 drug and device companies from 2016 to 2025. Education make up the largest share, 73% of the total. Intuitive Surgical, Inc. paid the most, $466,324.
General payments to Dr. Santiago by program year, 2016 to 2025
General payments to Dr. Santiago by kind, 2016 to 2025
- Education$349,70473%
- Travel and lodging$71,91715%
- Speaker and faculty fees$32,8007%
- Food and beverage$17,4844%
- Other$8,3002%
Companies that paid Dr. Santiago the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Cesar A. Santiago graduated from Ponce School of Medicine
Dr. Santiago graduated from Ponce School of Medicine in 2000.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Cesar A. Santiago's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Cesar A. Santiago
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Cesar A. Santiago's NPI number?
Dr. Cesar A. Santiago's NPI number is 1659396406. It was assigned on July 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Cesar A. Santiago?
Dr. Cesar A. Santiago is a colorectal surgeon in San Marcos, Texas. The primary specialty in the NPI Registry is Colon & Rectal Surgery Physician (taxonomy code 208C00000X).
Where does Dr. Cesar A. Santiago practice?
Dr. Santiago practices at 1301 Wonder World Drive, San Marcos, TX 78666. Dr. Santiago's primary practice is CHRISTUS Santa Rosa Hospital - San Marcos in San Marcos, Texas, part of CHRISTUS Health.
What is Dr. Cesar A. Santiago's office phone number?
The practice phone on file for Dr. Santiago is (512) 753-3511.
What is Dr. Cesar A. Santiago's medical license number?
Dr. Santiago holds Florida license ME95270, one of the licenses on file in 2 states.
Which states has Dr. Cesar A. Santiago been licensed in?
Dmand AI has state licenses on file for Dr. Santiago in Florida and Texas.
Which hospitals is Dr. Cesar A. Santiago affiliated with?
Dr. Santiago practices at CHRISTUS Santa Rosa Hospital - San Marcos in San Marcos, Texas.
What medical group is Dr. Cesar A. Santiago part of?
Dr. Santiago is linked to CHRISTUS Trinity Clinic.
Does Dr. Cesar A. Santiago accept Medicare?
Yes. CMS data shows Dr. Santiago billed Medicare for 98 services in 2024, and Dr. Santiago accepts Medicare assignment.
How many Medicare patients does Dr. Cesar A. Santiago see?
CMS counts 100 Medicare patients who saw Dr. Santiago in 2024, with an average age of 73.
Show 5 more questionsShow fewer questions
What services does Dr. Cesar A. Santiago bill to Medicare?
In 2024, Dr. Santiago's most billed Medicare services were office visit, new patient (99204), office visit, new patient (99205) and surgery: skin and soft tissue (15860).
Where did Dr. Cesar A. Santiago go to medical school?
Dr. Santiago graduated from Ponce School of Medicine in 2000.
What drugs does Dr. Cesar A. Santiago prescribe most?
In 2024 Medicare Part D data, Dr. Santiago's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Neomycin Sulfate and Metronidazole.
Has Dr. Cesar A. Santiago received payments from drug or device companies?
CMS Open Payments shows $480,205 in general payments to Dr. Santiago from 26 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Cesar A. Santiago been practicing?
Dr. Santiago graduated from medical school in 2000, 26 years ago.
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