Dr. Warren J. Gasper, MD
- Medicare services, 2024
- 771
- Medicare patients, 2024
- 417
- Publications
- 100
- Clinical trials
- 9
- MIPS score, 2024
- 98
- Practice address
- 505 Parnassus Ave, Box 0296, San Francisco, CA 94143
- Practice phone
- Call (415) 353-2733
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Gasper's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Warren J. Gasper is a general surgeon in San Francisco, California
Dr. Gasper practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.
Dr. Gasper's NPI, 1427186212, was assigned on March 1, 2007. Dr. Gasper graduated from University of Maryland School of Medicine in 2003. Dr. Gasper holds California license A89802.
- NPI
- 1427186212NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4486895125
- NPI enumeration date
- March 1, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (415) 353-2733
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Warren J. Gasper practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California
Dr. Gasper's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights, at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143 in San Francisco County. The practice phone is (415) 353-2733.
- UCSF Helen Diller Medical Center at Parnassus Heights505 Parnassus Ave, Box 0296, San Francisco, CA 94143 · San Francisco CountyPhone(415) 353-2733
Source: Dmand AI Affiliation Data
Dr. Warren J. Gasper is affiliated with 6 sites of care and 6 medical groups
Dr. Gasper's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Gasper to 5 more group practices and clinics and 5 medical groups, 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. Warren J. Gasper's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gasper practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCSF Helen Diller Medical Center at Parnassus Heights | Available with a free account |
| +5 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Warren J. Gasper is one of 2,926 general surgeons in California
Surgery is Dr. Gasper's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Gasper is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
General surgeons near Dr. Gasper
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. Warren J. Gasper billed Medicare for 771 services in 2024
CMS data shows 771 Medicare services from Dr. Gasper across 12 procedure codes in 2024, for 417 Medicare patients. Medicare paid $18,332 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Gasper's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 8102024: 7389%
- Imaging
- 2023: 212024: 3357%
Dr. Gasper compared with the California median for general surgeons, 2024
- Dr. Gasper
- California median
- Medicare services
- 771vs 1664.6 times
- Medicare patients
- 417vs 1213.4 times
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Gasper'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Warren J. Gasper treated 417 Medicare patients in 2024, average age 75
CMS counts 417 Medicare patients who saw Dr. Gasper in 2024. The largest group is 65 to 74, with 155 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 41% are also on Medicaid. Their average risk score is 2.57, 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. Gasper's median patient age at 69, with 43% women.
Dr. Gasper's Medicare patients by age, 2024
Dr. Gasper's Medicare patients by sex, 2024
- Women16840%
- Men24960%
Chronic conditions among Dr. Gasper's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease50%
- Ischemic heart disease49%
- Arthritis47%
- Diabetes42%
- Heart failure31%
- Mood disorders28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gasper's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women43%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Warren J. Gasper scored 98 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 98 out of 100 for Dr. Gasper for performance year 2024, reported as part of a group. Dr. Gasper accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Gasper as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Gasper's MIPS scores, performance year 2024
- 98of 100Final score
- 92.7of 100Quality
- 40of 100Improvement Activities
- 72of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Leg revascularization (restoring blood flow): 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. Warren J. Gasper has 100 publications on record
Dmand AI links 100 papers to Dr. Gasper, published from 2007 to 2025. 2023 was the busiest year, with 13. The most frequent topics are Endovascular Procedures, Blood Vessel Prosthesis Implantation and Aortic Aneurysm, Thoracic. Dr. Gasper has published most often in J Vasc Surg. Dr. Gasper's most frequent co-authors are Michael Salvatore Conte, MD, Andres Schanzer, MD and Adam Beck, MD.
Dr. Gasper's papers by year, 2016 to 2025
Topics Dr. Gasper writes about most
- Endovascular Procedures
- Blood Vessel Prosthesis Implantation
- Aortic Aneurysm, Thoracic
- Peripheral Arterial Disease
- Aortic Aneurysm, Abdominal
- Blood Vessel Prosthesis
- Postoperative Complications
- Stents
Dr. Gasper's most frequent co-authors
- Michael Salvatore Conte, MD28 shared papers
- Andres Schanzer, MD21 shared papers
- Adam Beck, MD20 shared papers
Recent publications by Dr. Gasper
See who Dr. Gasper researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gasper works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Warren J. Gasper has worked on 9 clinical trials
Dmand AI links Dr. Gasper to 9 clinical trials. 2 are still active or recruiting. Conditions studied include Chronic Limb-Threatening Ischemia, Aortic Aneurysm, Abdominal and Intermittent Claudication. University of California, San Francisco sponsors the most, 6.
Clinical trials with Dr. Gasper by phase
- NonePhase 1: no trials
- 1Phase 2: 1 trial
- NonePhase 3: no trials
- 1Phase 4: 1 trial
Trials with no phase (devices, behavioral studies) are left out.
Conditions in Dr. Gasper's trials
- Chronic Limb-Threatening Ischemia
- Aortic Aneurysm, Abdominal
- Intermittent Claudication
- Aortic Aneurysm, Thoracoabdominal
- Arteriovenous Fistula
Investigators on the most trials with Dr. Gasper
- Marlene Grenon, MD5 shared trials
- Joseph Hopkins Rapp, MD4 shared trials
- Michael Salvatore Conte, MD3 shared trials
Recent clinical trials with Dr. Gasper
Intima Versus Adventitia Drug Delivery to Elucidate Mechanisms of Restenosis: Magnetic Resonance Imaging (opens in a new tab)
Carotid Revascularization and Medical Management for Asymptomatic Carotid Stenosis Trial (opens in a new tab)
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Warren J. Gasper received $17,434 in industry payments from 2016 to 2025
CMS Open Payments shows 112 general payments to Dr. Gasper from 18 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 40% of the total. Provisio Medical paid the most, $7,143.
General payments to Dr. Gasper by program year, 2016 to 2025
General payments to Dr. Gasper by kind, 2016 to 2025
- Food and beverage$6,97640%
- Consulting fees$6,83539%
- Travel and lodging$3,62321%
Companies that paid Dr. Gasper 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. Warren J. Gasper graduated from University of Maryland School of Medicine
Dr. Gasper graduated from University of Maryland School of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Warren J. Gasper'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) |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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. Warren J. Gasper
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. Warren J. Gasper's NPI number?
Dr. Warren J. Gasper's NPI number is 1427186212. It was assigned on March 1, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Warren J. Gasper?
Dr. Warren J. Gasper is a general surgeon in San Francisco, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Warren J. Gasper practice?
Dr. Gasper practices at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143. Dr. Gasper's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dmand AI also links Dr. Gasper to 5 group practices and clinics and 5 medical groups.
What is Dr. Warren J. Gasper's office phone number?
The practice phone on file for Dr. Gasper is (415) 353-2733.
What is Dr. Warren J. Gasper's medical license number?
Dr. Gasper holds California license A89802.
Which hospitals is Dr. Warren J. Gasper affiliated with?
Dr. Gasper practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California.
What medical group is Dr. Warren J. Gasper part of?
Dr. Gasper is linked to UCSF Pediatrics. Dmand AI links Dr. Gasper to 5 more medical groups.
Does Dr. Warren J. Gasper accept Medicare?
Yes. CMS data shows Dr. Gasper billed Medicare for 771 services in 2024, and Dr. Gasper accepts Medicare assignment.
Does Dr. Warren J. Gasper offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Gasper as offering telehealth services.
What is Dr. Warren J. Gasper's MIPS score?
Dr. Gasper's MIPS final score for performance year 2024 is 98 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Warren J. Gasper see?
CMS counts 417 Medicare patients who saw Dr. Gasper in 2024, with an average age of 75.
What services does Dr. Warren J. Gasper bill to Medicare?
In 2024, Dr. Gasper's most billed Medicare services were blood vessel study (93923), blood vessel study (93925) and blood vessel study (93970).
Where did Dr. Warren J. Gasper go to medical school?
Dr. Gasper graduated from University of Maryland School of Medicine in 2003.
Has Dr. Warren J. Gasper received payments from drug or device companies?
CMS Open Payments shows $17,434 in general payments to Dr. Gasper from 18 companies from 2016 to 2025. The largest total came from Provisio Medical.
How long has Dr. Warren J. Gasper been practicing?
Dr. Gasper graduated from medical school in 2003, 23 years ago.
Does Dr. Warren J. Gasper do research?
Dmand AI links 100 publications to Dr. Gasper, published from 2007 to 2025. Dr. Gasper has worked on 9 clinical trials.
Who does Dr. Warren J. Gasper publish with?
Dr. Gasper's most frequent co-authors are Michael Salvatore Conte, MD (28 shared papers), Andres Schanzer, MD (21 shared papers) and Adam Beck, MD (20 shared papers).
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