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Grant Eric Barber, MD

Internal Medicine · Stanford

NPI 1528422847

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
Not verified
Not the same as out of network.
Office
1

Offices

1 location · Stanford Health Care · 3,152 clinicians in this group

Looking this up.

Hospitals listed: Stanford Health Care. That is not proof they admit you there this week.

Plan participation

Not verified

We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Dr. Barber’s office at (650) 723-4000 to ask if they take your plan before you enroll.

California Medical Board record

Licence A151462 · Current

Licensed to practise in California · since 2017 · expires 2027-08-31 · Harvard Medical School.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score
76.5 / 100
Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Hospitals they work in

1 hospital

These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.

  • Stanford Health CareStanford, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Stanford Health Care, which runs 3 hospitalsHome of Stanford Cancer Institute, a National Cancer Institute designated comprehensive cancer centrePatients rate it 4 of 5 · 83% would definitely recommend it
    Overall rating: 5 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 5.31 (4.24 to 6.37) · 8,661 cases, Jul 2022 – Jun 2024Worse than the national rate — Rate of inpatient admissions for patients receiving outpatient chemotherapy: 14.1 (12.7 to 15.7) · 2,191 cases, Jan 2024 – Dec 2024Better than the national rate — Postoperative respiratory failure rate: 4.08 (1.95 to 6.21) · 5,296 cases, Jul 2022 – Jun 2024Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.317, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.446, Oct 2024 – Sep 2025Better than the national rate — SSI - Colon Surgery: 0.241, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.7 (0.6 to 0.9) · 3,348 cases, Jan 2024 – Dec 2024
See every measure and the patient survey for Stanford Health Care

Behind the star rating — Deaths: 5 better, 3 the same, 0 worse of 8 measures. Safety: 3 better, 5 the same, 0 worse of 8 measures. Readmissions: 2 better, 5 the same, 4 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.

Every scored measure at Stanford Health Care
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths5.31 (4.24 to 6.37) · 8,661 casesWorseJul 2022 – Jun 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits14.1 (12.7 to 15.7) · 2,191 casesWorseJan 2024 – Dec 2024
Postoperative respiratory failure rateComplications and deaths4.08 (1.95 to 6.21) · 5,296 casesBetterJul 2022 – Jun 2024
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.317BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.446BetterOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0.241BetterOct 2024 – Sep 2025
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits0.7 (0.6 to 0.9) · 3,348 casesBetterJan 2024 – Dec 2024
Abdominopelvic accidental puncture or laceration rateComplications and deaths1.06 (0.45 to 1.67) · 5,374 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.86 (0.72 to 1)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths166.09 (137.88 to 194.3) · 470 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths1.1 · 192 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths6.4 · 146 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths9.7 · 253 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths6.3 · 880 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths10.3 · 935 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths8.7 · 501 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths2.1 · 7,730 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.13 (0 to 0.27) · 20,799 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.28 (0.14 to 0.43) · 23,182 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths0.94 (0.2 to 1.68) · 5,694 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.36 (1.54 to 3.19) · 7,846 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5.2 (3.76 to 6.64) · 5,603 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.38 (0.23 to 2.53) · 2,211 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.52 (0.21 to 0.83) · 19,915 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths3.6 · 416 casesNoneApr 2023 – Mar 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.869No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections0.857No differentOct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections0.368No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits16.2 · 247 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits20.5 · 1,021 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits47.8 · 258 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-1.6 · 990 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits20.8 · 976 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits16.5 · 959 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits5.2 (4.4 to 6.2) · 2,191 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.1 · 425 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits9.6 · 158 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits19.6 · 183 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits12.7 (10.4 to 15.4) · 4,578 casesNo differentJan 2022 – Dec 2024

What patients said (6,810 patients answered, 25% of those asked)

Patient survey stars by topic at Stanford Health Care
Cleanliness4
Nurse communication4
Doctor communication4
Communication about medicines3
Discharge information4
Overall hospital rating4
Quietness2
Recommend hospital5
Share of patients giving the best answer at Stanford Health Care
Room was "always" clean75%
Nurses "always" communicated well82%
Doctors "always" communicated well81%
Staff "always" explained63%
Yes, staff "did" give patients this information89%
Yes, staff "did" give patients information about help after discharge89%
Doctors "always" explained things so they could understand76%
Doctors "always" listened carefully80%
Doctors "always" treated them with courtesy and respect87%
Patients who gave a rating of "9" or "10" (high)79%
Staff "always" explained new medications76%
Nurses "always" explained things so they could understand77%
Nurses "always" listened carefully79%
Nurses "always" treated them with courtesy and respect88%
"Always" quiet at night53%
"YES", patients would definitely recommend the hospital83%
Staff "always" explained possible side effects50%
Yes, staff "did" give patients information about possible symptoms90%

Original Medicare doctor bills

$34,981

Medicare paid this office $34,981 for 139 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

Largest Original Medicare bills
Long return visit (40+ min)33$7,519$153
Initial hospital care with moderate level of medical decision making at least 75 minutes16$4,185$155
Removal of polyps or growths of large bowel using an endoscope with mechanical snare13$3,008$231
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes24$2,908$116
Return visit (30+ min)27$2,898$103
See all 9 services
Every Original Medicare service billed
Long return visit (40+ min)33$7,519$153
Initial hospital care with moderate level of medical decision making at least 75 minutes16$4,185$155
Removal of polyps or growths of large bowel using an endoscope with mechanical snare13$3,008$231
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes24$2,908$116
Return visit (30+ min)27$2,898$103
Biopsy of large bowel using a flexible endoscope22$2,661$116
New patient visit (60+ min)15$2,289$153
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope12$1,061$88
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's30$636$15

Procedures Medicare counted

Procedure volume Medicare published
Colonoscopy21More than 48% of doctors who do this
Upper gastrointestinal (GI) endoscopy for acid reflux18More than 49% of doctors who do this

Who their Medicare patients are

139 Original Medicare patients in 2024. Average age 71 · Under 65 14% · 85 and older 9% · Women 58% · Also on Medicaid 32% · Health risk score 1.87. Above the middle of the specialty; the typical internal medicine clinician is at 1.76.

Conditions among them: High blood pressure 71% · Diabetes 32% · Chronic kidney disease 28% · Depression 27% · Coronary heart disease 26% · Cancer 19% · Atrial fibrillation 19% · Heart failure 18% · COPD 13% · Dementia 11% · Stroke 10%.

The office billed $274,443, Medicare allowed $44,584 and paid $34,981; for 316 services of 31 kinds.

Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.

Year by year

Original Medicare by year
2024139316711.87$274,443$34,981
2023170301722.08$229,345$32,008
202254119742.28$74,977$11,480

Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.

See the services billed each year

2023: 11 services

Original Medicare services billed in 2023
New patient visit (60+ min)30$4,063$135
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes20$3,752$107
Removal of polyps or growths of large bowel using an endoscope with mechanical snare13$2,997$231
Long return visit (40+ min)20$2,831$118
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes20$2,342$71
New patient visit (45+ min)22$2,242$102
Initial hospital care with moderate level of medical decision making at least 75 minutes12$1,875$156
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes14$1,636$117
Return visit (30+ min)14$1,163$83
Biopsy of large bowel using a flexible endoscope13$1,012$78
New patient visit (30+ min)13$947$73

2022: 3 services

Original Medicare services billed in 2022
Initial hospital care with moderate level of medical decision making at least 75 minutes11$1,951$177
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes13$1,532$64
Hospital discharge day management, more than 30 minutes13$1,250$96

Drugs they prescribed that Part D paid

$336,140

Pharmacies billed $336,140 in 2024.

This is pharmacy cost, not the office bill, and not what patients paid.

Opioids were 0% of their Part D prescriptions (0 of 150) in 2024. At or below the middle of the specialty; the typical internal medicine clinician is at 1%.

106 generic and 44 brand-name prescriptions · $336,140 in drug cost.

Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.

Largest Part D drug costs
Peg 3350-Electrolyte21$545$26
Omeprazole12$531$24

Year by year

Part D prescribing by year
2024150690% (0)29%$336,140
202314684None23%$63,991
202232230% (0)None$2,226
202116None0% (0)None$6,031
202039None0% (0)0%$436
20193913NoneNone$4,613
201811None0% (0)100%$2,927

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

See the drugs prescribed each year

2023: 3 drugs

Part D drugs prescribed in 2023
Omeprazole27$1,451$54
Peg 3350-Electrolyte30$647$22
Gavilyte-G12$213$18

2022: 1 drug

Part D drugs prescribed in 2022
Peg 3350-Electrolyte13$356$27

2020: 1 drug

Part D drugs prescribed in 2020
Hydroxyzine19$257$14

2018: 1 drug

Part D drugs prescribed in 2018
Lantus11$2,927$266

Money from drug and device companies

$29 in 2025

Industry payments by year
202511None$29
202313None$152
202211None$123
202111None$122

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

Payments by company
Mauna Kea TechnologiesNone$29
1 payment
  • Meals · 2025-07-21 · $29
See the published payment
Every published payment
Mauna Kea TechnologiesMeals · 2025-07-21None$29
See earlier years (2023, 2022, 2021)

2023: $152

Payments by company in 2023
AbbVieSkyrizi$152
3 payments
  • Meals for Skyrizi · 2023-04-07 · $90
  • Meals for Rinvoq · 2023-02-14 · $33
  • Meals for Linzess · 2023-02-08 · $29

2022: $123

Payments by company in 2022
AbbvieRinvoq$123
1 payment
  • Meals for Rinvoq · 2022-08-03 · $123

2021: $122

Payments by company in 2021
AbbVieHumira$122
1 payment
  • Meals for Humira · 2021-09-30 · $122

Professional record

NPI
1528422847
Licence
CA A151462California A151462: Current · expires 2027-08-31
Trained
Harvard Medical School, 2016
Video visits
Lists video visits
Gender
Male
More record details
Sole proprietor
Yes
Taxonomy
Federal specialty code 207RG0100X (207RG0100X); Internal medicine (207R00000X)
Mailing address
300 Pasteur Dr, Stanford, CA, 94305
NPI first listed
2016-04-12
NPI last updated
2024-04-15
NPI record certified
2024-04-15

This is when the NPI record was last certified, not a medical board exam.

Extra NPI addresses: 119 Bay State Rd, Boston, MA, 02215