Anastomosis, Roux-en-YBody Mass IndexGastric Bypass
Dr. John Jih Jong Feng, MD
NPI1275625832PAC ID3274595939
- Medicare services, 2024
- 114
- Medicare patients, 2024
- 115
- Part D claims, 2024
- 62
- Publications
- 15
- Hospital affiliations
- 2
- Practice address
- 301 Industrial Road Suite 1se, San Carlos, CA 94070
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surgery Center San Carlos
Surgery Center - Medicare-Certified · San Carlos, California
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Dr. John Jih Jong Feng is a general surgeon in San Carlos, California
Dr. Feng practices at Surgery Center San Carlos in San Carlos, California.
Dr. Feng's NPI, 1275625832, was assigned on September 29, 2006. Dr. Feng graduated from UCSF School of Medicine in 1993. Dr. Feng holds California license G79786.
NPI and contact details
- NPI
- 1275625832NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274595939
- NPI enumeration date
- September 29, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Jih Jong Feng practices at Surgery Center San Carlos in San Carlos, California
Dr. Feng's primary practice is Surgery Center San Carlos, at 301 Industrial Road Suite 1se, San Carlos, CA 94070.
- Surgery Center San Carlos301 Industrial Road Suite 1se, San Carlos, CA 94070
Source: Dmand AI Affiliation Data
Dr. John Jih Jong Feng is affiliated with 3 sites of care and 1 medical group
Dr. Feng's primary practice is Surgery Center San Carlos in San Carlos, California. Dr. Feng is also affiliated with El Camino Health - Mountain View Hospital. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Feng to 1 more hospital, named with a free account.
Surgery Center San CarlosPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Jih Jong Feng's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Feng practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Surgery Center San Carlos | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Jih Jong Feng is one of 2,926 general surgeons in California
Surgery is Dr. Feng's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Feng is board certified in surgery by the American Board of Surgery. Dr. Feng is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists abdominal hernia repair surgery, colon removal, gallbladder removal, groin hernia surgery and hemorrhoids among the conditions Dr. Feng treats.
General surgeons near Dr. Feng
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. John Jih Jong Feng billed Medicare for 114 services in 2024
CMS data shows 114 Medicare services from Dr. Feng across 3 procedure codes in 2024, for 115 Medicare patients. Medicare paid $20,979 for them.
Medicare services, 2024114
Medicare patients115
Paid by Medicare$20,979
Procedure codes3
Dr. Feng's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 962024: 96No change
- Surgery
- 2023: 152024: 1820%
Where Dr. Feng's Medicare services took place, 2024
- In an office9684%
- In a facility1816%
Dr. Feng compared with the California median for general surgeons, 2024
- Dr. Feng
- California median
- Medicare services
- 114vs 16631% below
- Medicare patients
- 115vs 121Close to median
- Part D claims
- 44vs 3429% above
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Feng'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Feng and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Jih Jong Feng treated 115 Medicare patients in 2024, average age 74
CMS counts 115 Medicare patients who saw Dr. Feng in 2024. The largest group is 65 to 74, with 60 patients. 72% of them have high cholesterol, and 57% have high blood pressure. Their average risk score is 0.87, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Feng's median patient age at 56, with 45% women.
Medicare patients, 2024115
Average age74
Average risk score0.87
Dr. Feng's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Feng's Medicare patients by sex, 2024
- Women4539%
- Men7061%
Chronic conditions among Dr. Feng's Medicare patients, 2024
- High cholesterol72%
- High blood pressure57%
- Arthritis39%
- Ischemic heart disease21%
- Atrial fibrillation17%
- Anxiety16%
- Mood disorders14%
- Osteoporosis14%
Share of Medicare patients with each condition. A patient can have several.
Dr. Feng's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women45%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Jih Jong Feng wrote 62 Medicare Part D claims in 2024
In 2024, Dr. Feng wrote 62 Medicare Part D claims for 51 patients. 100% of them were for generic drugs. CMS names the drug for 44 of them, across 2 drugs with 11 or more claims each, at $125 in total drug cost. In 2023, CMS named 37 claims across 1 drug.
Part D claims, 202462
Drugs named by CMS2
Total drug cost$125
Part D patients51
Dr. Feng's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Feng's Part D claims, 2024
- Opioids77%48 of 62 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 372024: 4419%
Drugs named by CMS: 2 in 2024, 1 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. John Jih Jong Feng ranks in the 89th percentile for hernia repair (minimally invasive) in Medicare
Dr. Feng accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Feng as offering telehealth. CMS counts 21 procedures of hernia repair (minimally invasive) by Dr. Feng, more than 89% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Feng ranks in Medicare procedure volume
- Hernia repair (minimally invasive)
- 89th percentile21 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John Jih Jong Feng has 15 publications on record
Dmand AI links 15 papers to Dr. Feng in 2003. The most frequent topics are Gastric Bypass, Anastomosis, Roux-en-Y and Body Mass Index. Dr. Feng's most frequent co-author is James S. Constant, MD.
Papers15
Topics Dr. Feng writes about most
- Gastric Bypass
- Anastomosis, Roux-en-Y
- Body Mass Index
- Intestine, Small
- Obesity, Morbid
- Weaning
- Weight Loss
Dr. Feng's most frequent co-authors
Recent publications by Dr. Feng
Wound Repair Regen
AntibodiesBiocompatible MaterialsBlotting, Northern
J Pediatr Gastroenterol Nutr
Intestine, SmallNutritional Physiological PhenomenaRats, Inbred Strains
See who Dr. Feng researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Feng 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. John Jih Jong Feng received $9,325 in industry payments from 2016 to 2024
CMS Open Payments shows 60 general payments to Dr. Feng from 9 drug and device companies from 2016 to 2024. Consulting fees make up the largest share, 69% of the total. Ethicon Inc. paid the most, $6,628.
General payments to Dr. Feng by program year, 2016 to 2024
General payments to Dr. Feng by kind, 2016 to 2024
$9.3Kin total
- Consulting fees$6,43369%
- Food and beverage$1,77019%
- Travel and lodging$98411%
- Gifts$941%
- Education$440%
Companies that paid Dr. Feng the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Jih Jong Feng has 10 awards and honors on record
Dmand AI lists 10 awards for Dr. Feng, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Feng
- 2013
- CMS Stage 1 EHR
- 2012
- ACS Fellow
- 2004
- Fellow
- 1998
- Young Investigator Award
- 1996
- Wound Healing Fellowship
- 1995
- Fellowship for Medical Research
Source: Dmand AI Professional Profile Data
Dr. John Jih Jong Feng graduated from UCSF School of Medicine
Dr. Feng graduated from UCSF School of Medicine in 1993. Dr. Feng is a member of ACS, American Hernia Society, ASMBS and SAGES.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. John Jih Jong Feng accepts plans from 11 insurance carriers
Dr. Feng is in network with 11 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Elevance
- HCSC
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- +3 more carriersWith a free account
Plan types Dr. Feng accepts, by number of carriers
- PPO7
- HMO6
- EPO4
- Medicare3
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. John Jih Jong Feng'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)Medicare Part D Prescribers - 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)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 |
| 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. John Jih Jong Feng
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 Jih Jong Feng's NPI number?
Dr. John Jih Jong Feng's NPI number is 1275625832. It was assigned on September 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Jih Jong Feng?
Dr. John Jih Jong Feng is a general surgeon in San Carlos, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John Jih Jong Feng practice?
Dr. Feng practices at 301 Industrial Road Suite 1se, San Carlos, CA 94070. Dr. Feng's primary practice is Surgery Center San Carlos in San Carlos, California. Dmand AI also links Dr. Feng to 1 hospital.
What is Dr. John Jih Jong Feng's medical license number?
Dr. Feng holds California license G79786.
Which hospitals is Dr. John Jih Jong Feng affiliated with?
Dr. Feng is affiliated with El Camino Health - Mountain View Hospital. Dmand AI links Dr. Feng to 1 more hospital.
What medical group is Dr. John Jih Jong Feng part of?
Dr. Feng is linked to Palo Alto Foundation Medical Group.
Does Dr. John Jih Jong Feng accept Medicare?
Yes. CMS data shows Dr. Feng billed Medicare for 114 services in 2024, and Dr. Feng accepts Medicare assignment.
Does Dr. John Jih Jong Feng offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Feng as offering telehealth services.
How many Medicare patients does Dr. John Jih Jong Feng see?
CMS counts 115 Medicare patients who saw Dr. Feng in 2024, with an average age of 74.
Is Dr. John Jih Jong Feng board certified?
Yes. Dr. Feng is board certified in surgery by the American Board of Surgery.
Show 8 more questionsShow fewer questions
What services does Dr. John Jih Jong Feng bill to Medicare?
In 2024, Dr. Feng's most billed Medicare services were office visit, new patient (99204), office visit, established patient (99214) and surgery: digestive system (49650).
Where did Dr. John Jih Jong Feng go to medical school?
Dr. Feng graduated from UCSF School of Medicine in 1993.
What drugs does Dr. John Jih Jong Feng prescribe most?
In 2024 Medicare Part D data, Dr. Feng's most prescribed drugs by claims were Acetaminophen-Codeine and Hydrocodone-Acetaminophen.
Has Dr. John Jih Jong Feng received payments from drug or device companies?
CMS Open Payments shows $9,325 in general payments to Dr. Feng from 9 companies from 2016 to 2024. The largest total came from Ethicon Inc.
How long has Dr. John Jih Jong Feng been practicing?
Dr. Feng graduated from medical school in 1993, 33 years ago.
Does Dr. John Jih Jong Feng do research?
Dmand AI links 15 publications to Dr. Feng.
Who does Dr. John Jih Jong Feng publish with?
Dr. Feng's most frequent co-authors are James S. Constant, MD (1 shared paper).
What insurance does Dr. John Jih Jong Feng accept?
Dr. Feng is in network with 11 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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