J Clin Gastroenterol
Aluminum HydroxideAntacidsBicarbonates
Dr. John A. Selling, MD
NPI1386608024
- Medicare services, 2017
- 419
- Part D claims, 2018
- 26
- Publications
- 4
- Industry payments
- $210
- State license
- 1
- Practice address
- 340 Willowbrook Dr, Portola Valley, CA 94028-7842
- Practice phone
- Call (650) 743-0932
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Selling's professional email, personal email and mobile number
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Dr. John A. Selling is a gastroenterologist in Portola Valley, California
Dr. Selling practices in Portola Valley, California.
Dr. Selling's NPI, 1386608024, was assigned on April 12, 2006. Dr. Selling graduated from Yale School of Medicine in 1980. Dr. Selling holds California license G46375.
NPI and contact details
- NPI
- 1386608024NPI Registry (opens in a new tab)
- NPI enumeration date
- April 12, 2006
- NPI status
- Active
- Practice phone
- (650) 743-0932
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. John A. Selling's practice address is in Portola Valley, California
Dr. Selling's practice address in the NPI Registry is 340 Willowbrook Dr, Portola Valley, CA 94028-7842. The practice phone is (650) 743-0932.
- NPI Registry address340 Willowbrook Dr, Portola Valley, CA 94028-7842Phone(650) 743-0932
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. John A. Selling's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Selling practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Selling's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John A. Selling is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Selling's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Selling is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Selling is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Selling
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. John A. Selling billed Medicare for 419 services in 2017
CMS data shows 419 Medicare services from Dr. Selling across 8 procedure codes in 2017. Medicare paid $44,930 for them.
Medicare services, 2017419
Paid by Medicare$44,930
Procedure codes8
Dr. Selling's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 5162017: 21658%
- Surgery
- 2016: 4022017: 16260%
- Other services
- 2016: 942017: 4156%
- Lab and pathology
- 2016: 1,7402017: 0100%
- Tests and treatments
- 2016: 162017: 0100%
Where Dr. Selling's Medicare services took place, 2017
- In an office21652%
- In a facility20348%
Dr. Selling compared with the California median for gastroenterologists, 2017
- Dr. Selling
- California median
- Medicare services
- 419vs 58628% below
- Part D claims
- 26vs 38093% below
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Selling's most billed Medicare procedure codes, 2017
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Selling?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Selling and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John A. Selling's patients have a median age of 54
Across all payers, Dmand AI patient panel data puts Dr. Selling's median patient age at 54, with 67% women.
Dr. Selling's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women67%
- Men33%
Source: Dmand AI Patient Panel Data
Dr. John A. Selling wrote 26 Medicare Part D claims in 2018
In 2018, Dr. Selling wrote 26 Medicare Part D claims. Every claim was for a generic drug. They cover 2 drugs, with $918 in total drug cost. In 2017, CMS named 900 claims across 16 drugs.
Part D claims, 201826
Drugs named by CMS2
Total drug cost$918
Dr. Selling's most prescribed drugs by claims, 2018
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, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 9002018: 2697%
Drugs named by CMS: 2 in 2018, 16 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. John A. Selling has 4 publications on record
Dmand AI links 4 papers to Dr. Selling. The most frequent topics are Bicarbonates, Duodenum and Duodenal Ulcer.
Papers4
Topics Dr. Selling writes about most
- Bicarbonates
- Duodenum
- Duodenal Ulcer
- Hydrogen-Ion Concentration
- Indomethacin
- Intestinal Mucosa
Recent publications by Dr. Selling
AlprostadilBicarbonatesDuodenum
Administration, OralAdministration, TopicalBicarbonates
BicarbonatesDuodenal UlcerDuodenum
See who Dr. Selling researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Selling 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. John A. Selling received $210 in industry payments in 2016
CMS Open Payments shows 5 general payments to Dr. Selling from 2 drug and device companies in 2016. Food and beverage make up the largest share, 100% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $157.
Companies that paid Dr. Selling the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John A. Selling has 1 award and honors on record
Dmand AI lists 1 award for Dr. Selling, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Selling
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. John A. Selling graduated from Yale School of Medicine
Dr. Selling graduated from Yale School of Medicine in 1980.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. John A. Selling'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 |
| 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 |
| 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. John A. Selling
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. John A. Selling's NPI number?
Dr. John A. Selling's NPI number is 1386608024. It was assigned on April 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John A. Selling?
Dr. John A. Selling is a gastroenterologist in Portola Valley, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. John A. Selling practice?
Dr. Selling practices at 340 Willowbrook Dr, Portola Valley, CA 94028-7842.
What is Dr. John A. Selling's office phone number?
The practice phone on file for Dr. Selling is (650) 743-0932.
What is Dr. John A. Selling's medical license number?
Dr. Selling holds California license G46375.
Does Dr. John A. Selling accept Medicare?
Yes. CMS data shows Dr. Selling billed Medicare for 419 services in 2017.
Is Dr. John A. Selling board certified?
Yes. Dr. Selling is board certified in gastroenterology by the American Board of Internal Medicine.
What services does Dr. John A. Selling bill to Medicare?
In 2017, Dr. Selling's most billed Medicare services were office visit, established patient (99214), surgery: digestive system (43239) and surgery: digestive system (45384).
Where did Dr. John A. Selling go to medical school?
Dr. Selling graduated from Yale School of Medicine in 1980.
What drugs does Dr. John A. Selling prescribe most?
In 2018 Medicare Part D data, Dr. Selling's most prescribed drugs by claims were Omeprazole and Pantoprazole Sodium.
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Has Dr. John A. Selling received payments from drug or device companies?
CMS Open Payments shows $210 in general payments to Dr. Selling from 2 companies from 2016 to 2016. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. John A. Selling been practicing?
Dr. Selling graduated from medical school in 1980, 46 years ago.
Does Dr. John A. Selling do research?
Dmand AI links 4 publications to Dr. Selling.
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