Medicare Enrolled
Dr. Adolfo Diaz, MD
Hospitalist Physician · San Antonio, TX
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Diaz from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Diaz
Dr. Adolfo Diaz is a hospitalist physician in San Antonio, TX, with 14 years of NPI registration. Based on federal Medicare data, Dr. Diaz performed 18,136 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Diaz received a total of $349,082 from 18 pharmaceutical and/or device companies across 330 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Diaz is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 14 years of NPI registration
▲ Top 1% volume in TX
$349,082 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗18,136
Medicare services
Top 1% in TX for hospitalist physician
Not available
Unique patients (not deduplicated)
$21
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Pembrolizumab injection (Keytruda) | 7,200 | $43 | $161 |
| Anti-nausea injection (fosaprepitant) An injection of fosaprepitant, a medication used to prevent nausea and vomiting. |
4,200 | $0 | $1 |
| BCG treatment for bladder cancer | 2,459 | $2 | $9 |
| Anti-nausea injection (ondansetron/Zofran) | 1,032 | $0 | $0 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
984 | $0 | $0 |
| Fluorouracil injection, 500 mg Administration of a 500 mg dose of fluorouracil medication via injection. |
315 | $2 | $6 |
| Anti-nausea injection (Aloxi/palonosetron) | 280 | $1 | $7 |
| Injection, gemcitabine hydrochloride, not otherwise specified, 200 mg | 217 | $3 | $11 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
196 | $93 | $313 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
183 | $12 | $47 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
169 | $100 | $391 |
| Magnesium sulfate injection, per 500 mg An injection of magnesium sulfate administered in 500 mg increments. |
168 | $1 | $2 |
| Additional sequential IV infusion, 1 hour or less This code represents an additional intravenous infusion administered sequentially to a primary infusion. It covers the administration time of one hour or less. |
104 | $22 | $87 |
| Bladder instillation of anti-cancer drug A procedure where an anti-cancer medication is introduced directly into the bladder. This method delivers the treatment locally to the bladder tissue. |
72 | $66 | $257 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
59 | $127 | $439 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
49 | $6 | $26 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
44 | $11 | $41 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
41 | $22 | $86 |
| Intravenous infusion of new drug or substance, 1 hour or less This procedure involves administering a new medication or substance directly into a vein through an existing access site. The infusion is completed within one hour or less. |
41 | $50 | $196 |
| Non-hormonal chemotherapy injection This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue. |
40 | $56 | $219 |
| Additional hour of intravenous hydration This code represents each additional hour of intravenous fluid administration beyond the initial hour. It is used to bill for extended hydration therapy. |
37 | $10 | $38 |
| IV chemotherapy initiation with community continuation Initiation of an intravenous chemotherapy infusion in a clinic using clinic supplies, with continuation of the infusion in a community setting such as home or assisted living. |
33 | $127 | $468 |
| Intravenous infusion, 1 hour or less Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less. |
32 | $47 | $193 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
30 | $16 | $62 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
27 | $1 | $3 |
| Normal saline infusion, 1000 cc Administration of 1000 cc of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater solution. |
27 | $2 | $8 |
| Subcutaneous or intramuscular chemotherapy injection This procedure involves administering anti-cancer hormonal medication through an injection into the tissue under the skin or into a muscle. |
20 | $25 | $97 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
19 | $63 | $220 |
| Normal saline infusion, 250 cc Administration of 250 cubic centimeters of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater fluid. |
17 | $1 | $2 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
15 | $1 | $3 |
| Irrigation of implanted venous access device This procedure involves flushing an implanted venous access device to clear blockages or maintain patency. It ensures the device remains functional for delivering medications or fluids. |
14 | $17 | $76 |
| New patient office visit, complex (60-74 min) | 12 | $157 | $537 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.
2.3% high complexity
81.8% medium
15.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$349,082
Total received (2018-2024)
Avg $49,869/year across 7 years
Top 0% in TX for hospitalist physician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
18
Companies
330
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$92,860
2023
$131,056
2022
$64,754
2021
$19,304
2020
$10,513
2019
$28,751
2018
$1,843
Payments by company (2024)
ADC Therapeutics America, Inc.
$40,814
Incyte Corporation
$24,598
AstraZeneca Pharmaceuticals LP
$13,596
Genentech USA, Inc.
$12,075
MorphoSys, US Inc.
$1,740
Regeneron Pharmaceuticals, Inc.
$36
Top 3 companies account for 85.1% of 2024 payments
All-time payments by company (2018-2024) ›
Incyte Corporation
$92,288
ADC Therapeutics America, Inc.
$76,816
Lilly USA, LLC
$50,963
AstraZeneca Pharmaceuticals LP
$44,326
Genentech USA, Inc.
$39,312
Seattle Genetics, Inc.
$15,275
Verastem, Inc.
$11,591
Seagen Inc.
$9,193
AbbVie, Inc.
$4,713
Epizyme, Inc.,
$2,250
MorphoSys, US Inc.
$1,740
W. L. Gore & Associates, Inc.
$185
ViiV Healthcare Company
$125
Melinta Therapeutics, Inc.
$125
Novo Nordisk Inc
$117
Regeneron Pharmaceuticals, Inc.
$36
Amgen Inc.
$14
Genmab U.S., Inc.
$13
Top 3 companies account for 63.0% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · Baxdela · C3 Delivery System · CALQUENCE · Columvi · Copiktra · DOVATO · Epkinly · GAZYVA · JAYPIRCA · Lunsumio · MONJUVI · POLIVY · Polivy · TAZVERIK · VERZENIO · Venclexta
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Geographic Context
Hospitalist physicians in nearby ZIP areas
140
County median income
$70,571
Nearest hospital to ZIP centroid (approximate)
BAPTIST MEDICAL CENTER
5.2 mi
5.2 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Diaz is a mixed practice specialist, with above-average Medicare volume (top 1% in TX).
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Diaz experienced with pembrolizumab injection (keytruda)?
Based on Medicare claims data, Dr. Diaz performed 7,200 pembrolizumab injection (keytruda) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Diaz receive payments from pharmaceutical companies?
Yes. Dr. Diaz received a total of $349,082 from 18 companies across 330 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Diaz's costs compare to other hospitalist physicians in San Antonio?
Dr. Diaz's average Medicare payment per service is $21. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Diaz) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology