Dr. Stephen A. De Santis, MD
- Medicare services, 2024
- 84
- Medicare patients, 2024
- 76
- Part D claims, 2022
- 28
- MIPS score, 2024
- 85
- Hospital affiliations
- 1
- Practice address
- 333 Mercy Avenue, Merced, CA 95340
- Practice phone
- Call (209) 564-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. De Santis' professional email, personal email and mobile number
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Dr. Stephen A. De Santis is a general surgeon in Merced, California
Dr. De Santis practices at Dignity Health - Mercy Medical Center in Merced, California, part of CommonSpirit Health.
Dr. De Santis' NPI, 1366442584, was assigned on July 29, 2005. Dr. De Santis graduated from David Geffen School of Medicine at UCLA in 1978. Dr. De Santis holds California license G40996A.
- NPI
- 1366442584NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234254020
- NPI enumeration date
- July 29, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (209) 564-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen A. De Santis practices at Dignity Health - Mercy Medical Center in Merced, California
Dr. De Santis' primary practice is Dignity Health - Mercy Medical Center, at 333 Mercy Avenue, Merced, CA 95340 in Merced County. The practice phone is (209) 564-5000.
- Dignity Health - Mercy Medical Center333 Mercy Avenue, Merced, CA 95340 · Merced CountyPhone(209) 564-5000
Source: Dmand AI Affiliation Data
Dr. Stephen A. De Santis is affiliated with 6 sites of care and 5 medical groups
Dr. De Santis' primary practice is Dignity Health - Mercy Medical Center in Merced, California, part of CommonSpirit Health. The medical group on file is Adventist Health Physicians Network. Dmand AI also links Dr. De Santis to 4 more medical groups, 3 group practices and clinics, 1 hospital outpatient department and 1 rural health clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stephen A. De Santis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. De Santis practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - Mercy Medical Center | Available with a free account |
| +5 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen A. De Santis is one of 2,926 general surgeons in California
Surgery is Dr. De Santis' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. De Santis is board certified in surgery by the American Board of Surgery. Dr. De Santis is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists abdominal hernia repair surgery and gallbladder removal among the conditions Dr. De Santis treats.
General surgeons near Dr. De Santis
Counts of general 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. Stephen A. De Santis billed Medicare for 84 services in 2024
CMS data shows 84 Medicare services from Dr. De Santis across 2 procedure codes in 2024, for 76 Medicare patients. Medicare paid $7,401 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. De Santis' Medicare services by type, 2022 to 2024
- 2022
- 2024
- Office and hospital visits
- 2022: 352024: 84140%
Dr. De Santis compared with the California median for general surgeons, 2024
- Dr. De Santis
- California median
- Medicare services
- 84vs 16649% below
- Medicare patients
- 76vs 12137% below
- Part D claims
- 28vs 3418% below
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. De Santis' 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. De Santis and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen A. De Santis treated 76 Medicare patients in 2024, average age 70
CMS counts 76 Medicare patients who saw Dr. De Santis in 2024. The largest group is 65 to 74, with 37 patients. 75% of them have high blood pressure, and 72% have high cholesterol. 49% are also on Medicaid. Their average risk score is 1.91, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. De Santis' median patient age at 53, with 64% women.
Dr. De Santis' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. De Santis' Medicare patients by sex, 2024
- Women4357%
- Men3343%
Chronic conditions among Dr. De Santis' Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Anxiety47%
- Diabetes46%
- Mood disorders45%
- Arthritis43%
- Depression42%
- Ischemic heart disease29%
Share of Medicare patients with each condition. A patient can have several.
Dr. De Santis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women64%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen A. De Santis wrote 28 Medicare Part D claims in 2022
In 2022, Dr. De Santis wrote 28 Medicare Part D claims. They cover 2 drugs, with $192 in total drug cost. In 2021, CMS named 14 claims across 1 drug.
Dr. De Santis' most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 142022: 28100%
Drugs named by CMS: 2 in 2022, 1 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Stephen A. De Santis scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Dr. De Santis for performance year 2024, reported as part of a group. Dr. De Santis accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. De Santis' MIPS scores, performance year 2024
- 85of 100Final score
- 81.7of 100Quality
- 97of 100Promoting Interoperability
- 40of 100Improvement Activities
- 67of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Stephen A. De Santis received $484 in industry payments from 2016 to 2022
CMS Open Payments shows 24 general payments to Dr. De Santis from 13 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 91% of the total. Allergan Inc. paid the most, $132.
General payments to Dr. De Santis by program year, 2016 to 2022
General payments to Dr. De Santis by kind, 2016 to 2022
- Food and beverage$43991%
- Entertainment$459%
Companies that paid Dr. De Santis the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen A. De Santis has 1 award and honors on record
Dmand AI lists 1 award for Dr. De Santis, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. De Santis
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Stephen A. De Santis graduated from David Geffen School of Medicine at UCLA
Dr. De Santis graduated from David Geffen School of Medicine at UCLA in 1978.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Stephen A. De Santis accepts plans from 14 insurance carriers
Dr. De Santis is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. De Santis accepts, by number of carriers
- PPO9
- HMO7
- Medicare7
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Stephen A. De Santis'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Stephen A. De Santis
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. Stephen A. De Santis' NPI number?
Dr. Stephen A. De Santis' NPI number is 1366442584. It was assigned on July 29, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen A. De Santis?
Dr. Stephen A. De Santis is a general surgeon in Merced, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Stephen A. De Santis practice?
Dr. De Santis practices at 333 Mercy Avenue, Merced, CA 95340. Dr. De Santis' primary practice is Dignity Health - Mercy Medical Center in Merced, California, part of CommonSpirit Health. Dmand AI also links Dr. De Santis to 4 medical groups, 3 group practices and clinics, 1 hospital outpatient department and 1 rural health clinic.
What is Dr. Stephen A. De Santis' office phone number?
The practice phone on file for Dr. De Santis is (209) 564-5000.
What is Dr. Stephen A. De Santis' medical license number?
Dr. De Santis holds California license G40996A.
Which hospitals is Dr. Stephen A. De Santis affiliated with?
Dr. De Santis practices at Dignity Health - Mercy Medical Center in Merced, California.
What medical group is Dr. Stephen A. De Santis part of?
Dr. De Santis is linked to Adventist Health Physicians Network. Dmand AI links Dr. De Santis to 4 more medical groups.
Does Dr. Stephen A. De Santis accept Medicare?
Yes. CMS data shows Dr. De Santis billed Medicare for 84 services in 2024, and Dr. De Santis accepts Medicare assignment.
What is Dr. Stephen A. De Santis' MIPS score?
Dr. De Santis' MIPS final score for performance year 2024 is 85 out of 100, reported as part of a group.
How many Medicare patients does Dr. Stephen A. De Santis see?
CMS counts 76 Medicare patients who saw Dr. De Santis in 2024, with an average age of 70.
Show 7 more questionsShow fewer questions
Is Dr. Stephen A. De Santis board certified?
Yes. Dr. De Santis is board certified in surgery by the American Board of Surgery.
What services does Dr. Stephen A. De Santis bill to Medicare?
In 2024, Dr. De Santis' most billed Medicare services were hospital inpatient care (99222) and hospital inpatient care (99232).
Where did Dr. Stephen A. De Santis go to medical school?
Dr. De Santis graduated from David Geffen School of Medicine at UCLA in 1978.
What drugs does Dr. Stephen A. De Santis prescribe most?
In 2022 Medicare Part D data, Dr. De Santis' most prescribed drugs by claims were Oxycodone-Acetaminophen and Sulfamethoxazole-Trimethoprim.
Has Dr. Stephen A. De Santis received payments from drug or device companies?
CMS Open Payments shows $484 in general payments to Dr. De Santis from 13 companies from 2016 to 2022. The largest total came from Allergan Inc.
How long has Dr. Stephen A. De Santis been practicing?
Dr. De Santis graduated from medical school in 1978, 48 years ago.
What insurance does Dr. Stephen A. De Santis accept?
Dr. De Santis is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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