Neurogastroenterol Motil
Autonomic Nervous SystemGastric EmptyingGastroparesis
Dr. William John Snape Jr., MD
NPI1548282999
- Medicare services, 2016
- 555
- Part D claims, 2016
- 351
- Publications
- 85
- Clinical trials
- 4
- Industry payments
- $581
- Practice address
- 2340 Clay St, San Francisco, CA 94115-1932
- Practice phone
- Call (415) 600-1138
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Snape's professional email, personal email and mobile number
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Dr. William John Snape Jr. is a gastroenterologist in San Francisco, California
Dr. Snape practices in San Francisco, California.
Dr. Snape's NPI, 1548282999, was assigned on July 24, 2006. Dr. Snape graduated from Sidney Kimmel Medical College in 1969. Dr. Snape's California license number on file is G46515.
NPI and contact details
- NPI
- 1548282999NPI Registry (opens in a new tab)
- NPI enumeration date
- July 24, 2006
- NPI status
- Active
- Practice phone
- (415) 600-1138
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1969
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. William John Snape Jr.'s practice address is in San Francisco, California
Dr. Snape's practice address in the NPI Registry is 2340 Clay St, San Francisco, CA 94115-1932. The practice phone is (415) 600-1138.
- NPI Registry address2340 Clay St, San Francisco, CA 94115-1932Phone(415) 600-1138
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. William John Snape Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Snape practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Snape's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William John Snape Jr. is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Snape's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Snape is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Snape has a license on file in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Snape
Counts of gastroenterologists 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. William John Snape Jr. billed Medicare for 555 services in 2016
CMS data shows 555 Medicare services from Dr. Snape across 15 procedure codes in 2016. Medicare paid $45,285 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2016555
Paid by Medicare$45,285
Procedure codes15
Dr. Snape's Medicare services by type, 2016
- Office and hospital visits343
- Tests and treatments103
- Surgery75
- Imaging34
Dr. Snape compared with the California median for gastroenterologists, 2016
- Dr. Snape
- California median
- Medicare services
- 555vs 5865% below
- Part D claims
- 351vs 3808% below
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Snape's most billed Medicare procedure codes, 2016
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. William John Snape Jr.'s patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Snape's median patient age at 63.
Dr. Snape's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Source: Dmand AI Patient Panel Data
Dr. William John Snape Jr. wrote 351 Medicare Part D claims in 2016
In 2016, Dr. Snape wrote 351 Medicare Part D claims. They cover 17 drugs, with $37,136 in total drug cost.
Part D claims, 2016351
Drugs named by CMS17
Total drug cost$37,136
Dr. Snape's most prescribed drugs by claims, 2016
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. William John Snape Jr. has 85 publications on record
Dmand AI links 85 papers to Dr. Snape, published from 2010 to 2020. 2017 was the busiest year, with 7. The most frequent topics are Gastroparesis, Gastric Emptying and Gastrointestinal Motility. Dr. Snape has published most often in Gastroenterology. Dr. Snape's most frequent co-authors are Pankaj J. Pasricha, MD, Gianrico Farrugia, MD and Henry P. Parkman, MD.
Papers85
Years published2010 to 2020
Dr. Snape's papers by year, 2011 to 2020
Topics Dr. Snape writes about most
- Gastroparesis
- Gastric Emptying
- Gastrointestinal Motility
- Colon
- Pressure
- Muscle, Smooth
- Nausea
- Diabetes Complications
Dr. Snape's most frequent co-authors
- Pankaj J. Pasricha, MD29 shared papers
- Gianrico Farrugia, MD28 shared papers
- Henry P. Parkman, MD28 shared papers
Recent publications by Dr. Snape
GastroparesisMarijuana Use
Neurogastroenterol Motil
Blood Glucose Self-MonitoringDiabetes ComplicationsDiabetes Mellitus
See who Dr. Snape researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Snape works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William John Snape Jr. has worked on 4 clinical trials
Dmand AI links Dr. Snape to 4 clinical trials. Conditions studied include Gastroparesis, Paralysis and Vomiting. Johns Hopkins Bloomberg School of Public Health sponsors the most, 2.
Clinical trials with Dr. Snape by phase
- NonePhase 1: no trials
- 1Phase 2: 1 trial
- 1Phase 3: 1 trial
- NonePhase 4: no trials
Conditions in Dr. Snape's trials
- Gastroparesis
- Paralysis
- Vomiting
Investigators on the most trials with Dr. Snape
- Thomas Lyman Abell, MD1 shared trial
- Kenneth Louis Koch, MD1 shared trial
- Henry P. Parkman, MD1 shared trial
Recent clinical trials with Dr. Snape
Aprepitant for the Relief of Nausea in Patients With Chronic Nausea and Vomiting of Presumed Gastric Origin Trial (opens in a new tab)
CompletedPhase 2
GastroparesisVomitingAprepitant
GastroparesisParalysis
GastroparesisParalysisCGMS and insulin pump
Nortriptyline for Idiopathic Gastroparesis (opens in a new tab)
CompletedPhase 3
Nortriptyline Hydrochloride
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. William John Snape Jr. received $581 in industry payments from 2016 to 2018
CMS Open Payments shows 31 general payments to Dr. Snape from 10 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $314.
General payments to Dr. Snape by program year, 2016 to 2018
Companies that paid Dr. Snape the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William John Snape Jr. has 4 awards and honors on record
Dmand AI lists 4 awards for Dr. Snape, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Snape
- 2013
- CMS Stage 1 EHR
- 2006
- ACG Fellow
- 1983
- AGA Fellow
- Undated
- ASCI Member
Source: Dmand AI Professional Profile Data
Dr. William John Snape Jr. graduated from Sidney Kimmel Medical College
Dr. Snape graduated from Sidney Kimmel Medical College in 1969. Dr. Snape is a member of ACG and AGA.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. William John Snape Jr. accepts plans from 1 insurance carrier
Dr. Snape is in network with 1 carrier, including NV State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.
- NV State Medicaid
Source: Dmand AI Insurance Network Data
Sources for Dr. William John Snape Jr.'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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) |
| 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. William John Snape Jr.
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. William John Snape Jr.'s NPI number?
Dr. William John Snape Jr.'s NPI number is 1548282999. It was assigned on July 24, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William John Snape Jr.?
Dr. William John Snape Jr. is a gastroenterologist in San Francisco, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. William John Snape Jr. practice?
Dr. Snape practices at 2340 Clay St, San Francisco, CA 94115-1932.
What is Dr. William John Snape Jr.'s office phone number?
The practice phone on file for Dr. Snape is (415) 600-1138.
What is Dr. William John Snape Jr.'s medical license number?
Dr. Snape's California license number on file is G46515.
Does Dr. William John Snape Jr. accept Medicare?
Yes. CMS data shows Dr. Snape billed Medicare for 555 services in 2016.
Is Dr. William John Snape Jr. board certified?
Yes. Dr. Snape is board certified in gastroenterology by the American Board of Internal Medicine.
What services does Dr. William John Snape Jr. bill to Medicare?
In 2016, Dr. Snape's most billed Medicare services were office visit, established patient (99215), office visit, new patient (99205) and surgery: digestive system (43239).
Where did Dr. William John Snape Jr. go to medical school?
Dr. Snape graduated from Sidney Kimmel Medical College in 1969.
What drugs does Dr. William John Snape Jr. prescribe most?
In 2016 Medicare Part D data, Dr. Snape's most prescribed drugs by claims were Pyridostigmine Bromide, Linzess and Nortriptyline HCl.
Show 5 more questionsShow fewer questions
Has Dr. William John Snape Jr. received payments from drug or device companies?
CMS Open Payments shows $581 in general payments to Dr. Snape from 10 companies from 2016 to 2018. The largest total came from Allergan Inc.
How long has Dr. William John Snape Jr. been practicing?
Dr. Snape graduated from medical school in 1969, 57 years ago.
Does Dr. William John Snape Jr. do research?
Dmand AI links 85 publications to Dr. Snape, published from 2010 to 2020. Dr. Snape has worked on 4 clinical trials.
Who does Dr. William John Snape Jr. publish with?
Dr. Snape's most frequent co-authors are Pankaj J. Pasricha, MD (29 shared papers), Gianrico Farrugia, MD (28 shared papers) and Henry P. Parkman, MD (28 shared papers).
What insurance does Dr. William John Snape Jr. accept?
Dr. Snape is in network with 1 carrier, including NV State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.
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