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Woong Ray Kim, MD

Gastroenterology · Scottsdale

NPI 1114999570

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 · Mayo Clinic Arizona · 1,618 clinicians in this group

Looking this up.

Hospitals listed: Mayo Clinic Hospital. 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. Kim’s office at (480) 301-8000 to ask if they take your plan before you enroll.

California Medical Board record

Licence C131598 · Current

Licensed to practise in California · since 2014 · expires 2028-03-31 · Seoul National University College of Medicine.

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

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.

  • Mayo Clinic HospitalPhoenix, AZAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Mayo Clinic Health System, which runs 26 hospitals in 5 statesHome of Mayo Clinic Comprehensive Cancer Center, a National Cancer Institute designated comprehensive cancer centrePatients rate it 5 of 5 · 93% would definitely recommend it
    Overall rating: 5 of 5 starsWorse than the national rate — SSI - Colon Surgery: 1.616, Oct 2024 – Sep 2025Better than the national rate — Abdominopelvic accidental puncture or laceration rate: 0.36 (0 to 0.99) · 5,539 cases, Jul 2022 – Jun 2024Better than the national rate — Death rate among surgical inpatients with serious treatable complications: 115.44 (80.81 to 150.07) · 306 cases, Jul 2022 – Jun 2024Better than the national rate — Pressure ulcer rate: 0.21 (0 to 0.58) · 16,145 cases, Jul 2022 – Jun 2024Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.486, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.56, Oct 2024 – Sep 2025
See every measure and the patient survey for Mayo Clinic Hospital

Behind the star rating — Deaths: 5 better, 3 the same, 0 worse of 8 measures. Safety: 1 better, 7 the same, 0 worse of 8 measures. Readmissions: 4 better, 7 the same, 0 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 Mayo Clinic Hospital
SSI - Colon SurgeryInfections1.616WorseOct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths0.36 (0 to 0.99) · 5,539 casesBetterJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths115.44 (80.81 to 150.07) · 306 casesBetterJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.21 (0 to 0.58) · 16,145 casesBetterJul 2022 – Jun 2024
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.486BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.56BetterOct 2024 – Sep 2025
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.91 (0.75 to 1.08)No differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths1.9 · 96 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths6.2 · 144 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths8.3 · 271 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths7.7 · 884 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths11.2 · 1,245 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths10.9 · 274 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths2.3 · 5,311 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.22 (0.06 to 0.38) · 17,299 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.19 (0.04 to 0.35) · 19,712 casesNo differentJul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths4.12 (2.86 to 5.38) · 6,130 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths2.24 (1.25 to 3.22) · 3,321 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths3.17 (2.23 to 4.11) · 5,145 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths9.11 (6.21 to 12) · 3,094 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5.66 (3.86 to 7.47) · 3,309 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.85 (0.68 to 3.02) · 2,189 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths6.9 · 107 casesNoneApr 2023 – Mar 2025
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.682No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections0.477No differentOct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections2.73No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits13.9 · 228 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits19.8 · 776 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits-3.8 · 280 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-18.9 · 1,023 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits-9 · 1,336 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits16.8 · 1,118 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits6.3 (4.5 to 8.8) · 469 casesNo differentJan 2024 – Dec 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits9.6 (7.2 to 12.7) · 469 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits6 · 112 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits12.2 · 69 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits17.8 · 130 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits15.7 (12.7 to 19.3) · 2,211 casesNo differentJan 2022 – Dec 2024
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits1 (0.9 to 1.2) · 3,441 casesNo differentJan 2024 – Dec 2024

What patients said (1,947 patients answered, 35% of those asked)

Patient survey stars by topic at Mayo Clinic Hospital
Cleanliness4
Nurse communication5
Doctor communication5
Communication about medicines4
Discharge information5
Overall hospital rating5
Quietness5
Recommend hospital5
Share of patients giving the best answer at Mayo Clinic Hospital
Room was "always" clean80%
Nurses "always" communicated well88%
Doctors "always" communicated well86%
Staff "always" explained70%
Yes, staff "did" give patients this information93%
Yes, staff "did" give patients information about help after discharge93%
Doctors "always" explained things so they could understand81%
Doctors "always" listened carefully86%
Doctors "always" treated them with courtesy and respect92%
Patients who gave a rating of "9" or "10" (high)91%
Staff "always" explained new medications83%
Nurses "always" explained things so they could understand84%
Nurses "always" listened carefully86%
Nurses "always" treated them with courtesy and respect93%
"Always" quiet at night70%
"YES", patients would definitely recommend the hospital93%
Staff "always" explained possible side effects57%
Yes, staff "did" give patients information about possible symptoms93%

Original Medicare doctor bills

$6,060

Medicare paid this office $6,060 for 53 people.

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

Largest Original Medicare bills
Return visit (30+ min)24$2,420$97
Long return visit (40+ min)14$1,587$113

Who their Medicare patients are

53 Original Medicare patients in 2024. Average age 71 · Women 45% · Health risk score 2.26. Above the middle of the specialty; the typical gastroenterology clinician is at 1.42.

Conditions among them: High blood pressure 62% · Diabetes 26% · Chronic kidney disease 25%.

The office billed $25,739, Medicare allowed $9,057 and paid $6,060; for 64 services of 6 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
20245364712.26$25,739$6,060
2023107131722.01$65,595$12,906
2022194309711.73$173,718$33,740
2021158303711.65$191,079$34,041
2020124205712.19$113,484$18,583
2019116224702.00$81,319$18,158
201895185712.14$38,260$14,446
201751103692.19$25,869$7,559
20165291701.84$19,963$6,294
2015144221672.22$63,529$15,196
20146164651.71$13,977$4,760
20133143701.28$7,449$5,096

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: 5 services

Original Medicare services billed in 2023
Long return visit (40+ min)29$3,635$110
New patient visit (60+ min)24$3,349$140
Return visit (30+ min)30$2,345$73
Long return visit (40+ min)14$2,128$125
Measurement of liver stiffness11$77$7

2022: 6 services

Original Medicare services billed in 2022
Long return visit (40+ min)75$10,678$112
New patient visit (60+ min)39$6,533$168
Return visit (30+ min)54$5,120$79
Long return visit (40+ min)15$4,661$123
New patient visit (45+ min)27$3,181$118
Measurement of liver stiffness18$164$9

2021: 6 services

Original Medicare services billed in 2021
Long return visit (40+ min)68$11,284$114
New patient visit (60+ min)43$6,776$158
Return visit (30+ min)55$5,970$84
Long return visit (40+ min)12$4,577$127
New patient visit (45+ min)21$2,647$126
Measurement of liver stiffness14$133$9

2020: 4 services

Original Medicare services billed in 2020
Long return visit (40+ min)67$8,992$100
New patient visit (60+ min)17$2,564$151
Return visit (30+ min)30$2,166$64
New patient visit (45+ min)19$2,113$111

2019: 6 services

Original Medicare services billed in 2019
Long return visit (40+ min)41$4,989$92
New patient visit (45+ min)30$3,230$108
Long return visit (40+ min)14$2,982$90
Return visit (30+ min)31$2,249$62
Measurement of liver stiffness17$208$12
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito14$63$4

2018: 6 services

Original Medicare services billed in 2018
Return visit (30+ min)36$2,896$69
Long return visit (40+ min)17$2,494$96
New patient visit (45+ min)21$2,163$103
Long return visit (40+ min)19$2,068$98
Return visit (30+ min)24$1,907$68
Measurement of liver stiffness12$116$10

2017: 2 services

Original Medicare services billed in 2017
Return visit (30+ min)39$3,839$65
Long return visit (40+ min)11$2,092$100

2016: 2 services

Original Medicare services billed in 2016
Return visit (30+ min)33$3,239$59
New patient visit (45+ min)15$1,730$115

2015: 3 services

Original Medicare services billed in 2015
Return visit (30+ min)101$9,068$61
Long return visit (40+ min)21$1,497$71
Return visit (30+ min)15$1,240$77

2014: 1 service

Original Medicare services billed in 2014
Return visit (30+ min)42$2,993$70

Drugs they prescribed that Part D paid

$37,996

Pharmacies billed $37,996 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 144) in 2024. At or below the middle of the specialty; the typical gastroenterology clinician is at 0%.

125 generic and 19 brand-name prescriptions · $37,996 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
Entecavir14$1,972$141
Ursodiol14$1,971$141
Fludrocortisone Acetate14$112$8
Prednisone14$33$2
Pantoprazole12$28$2

Year by year

Part D prescribing by year
2024144240% (0)13%$37,996
2023446530% (0)18%$146,598
2022382650% (0)21%$147,857
2021312590% (0)29%$151,223
2020319470% (0)39%$356,294
201928754None30%$123,708
201827053NoneNone$394,294
201719128None29%$301,877
201633047None25%$831,256
201544164None31%$1,770,960
20149826None20%$220,452
201311720None21%$24,558

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

See the drugs prescribed each year

2023: 14 drugs

Part D drugs prescribed in 2023
Vemlidy43$61,194$1,423
Xifaxan11$33,697$3,063
Entecavir35$10,649$304
Ursodiol45$9,664$215
Tacrolimus39$3,795$97
Spironolactone16$411$26
Fludrocortisone Acetate23$384$17
Carvedilol18$325$18
Famotidine22$262$12
Mirtazapine11$215$20
Levothyroxine18$155$9
Prednisone19$92$5
Sulfamethoxazole-Trimethoprim12$69$6
Pantoprazole14$37$3

2022: 10 drugs

Part D drugs prescribed in 2022
Vemlidy41$56,082$1,368
Entecavir65$13,654$210
Eliquis11$5,665$515
Ursodiol19$5,377$283
Tacrolimus46$3,979$87
Fludrocortisone Acetate16$219$14
Famotidine17$142$8
Pantoprazole14$137$10
Levothyroxine12$81$7
Furosemide13$49$4

2021: 8 drugs

Part D drugs prescribed in 2021
Vemlidy34$44,364$1,305
Xifaxan11$27,573$2,507
Entecavir40$16,699$417
Ursodiol20$5,272$264
Tacrolimus37$3,163$85
Fludrocortisone Acetate21$360$17
Famotidine11$120$11
Furosemide22$118$5

2020: 9 drugs

Part D drugs prescribed in 2020
Xifaxan21$56,223$2,677
Vemlidy43$52,064$1,211
Entecavir44$13,399$305
Ursodiol32$6,596$206
Tacrolimus43$4,075$95
Azathioprine11$535$49
Spironolactone13$386$30
Pantoprazole12$189$16
Furosemide13$157$12

2019: 11 drugs

Part D drugs prescribed in 2019
Vemlidy43$48,775$1,134
Xifaxan13$30,286$2,330
Entecavir29$11,723$404
Sirolimus11$4,225$384
Tenofovir Disoproxil16$2,942$184
Ursodiol17$2,466$145
Tacrolimus16$1,253$78
Mycophenolate Mofetil12$818$68
Spironolactone28$546$20
Pantoprazole15$124$8
Furosemide16$114$7

2018: 7 drugs

Part D drugs prescribed in 2018
Vemlidy35$46,928$1,341
Entecavir28$21,629$772
Tacrolimus14$1,695$121
Mycophenolate Mofetil12$1,018$85
Spironolactone30$610$20
Pantoprazole15$72$5
Furosemide15$33$2

2017: 6 drugs

Part D drugs prescribed in 2017
Vemlidy23$23,609$1,026
Entecavir24$21,636$901
Tacrolimus16$2,092$131
Spironolactone29$566$20
Pantoprazole13$68$5
Furosemide14$67$5

2016: 13 drugs

Part D drugs prescribed in 2016
Harvoni20$634,330$31,716
Xifaxan19$51,483$2,710
Entecavir20$15,642$782
Viread12$12,091$1,008
Ursodiol18$7,811$434
Tacrolimus24$2,747$114
Ribasphere12$1,030$86
Spironolactone40$790$20
Alendronate13$167$13
Ranitidine17$148$9
Furosemide22$116$5
Pantoprazole13$92$7
Gabapentin13$29$2

2015: 10 drugs

Part D drugs prescribed in 2015
Harvoni45$1,427,525$31,723
Xifaxan33$55,153$1,671
Entecavir22$27,168$1,235
Ursodiol57$21,577$379
Tacrolimus17$2,066$122
Ribasphere12$1,196$100
Propranolol21$1,154$55
Spironolactone51$856$17
Azathioprine12$520$43
Furosemide36$159$4

2014: 1 drug

Part D drugs prescribed in 2014
Omeprazole14$244$17

2013: 2 drugs

Part D drugs prescribed in 2013
Ursodiol12$1,952$163
Spironolactone22$885$40

Money from drug and device companies

$22,721 in 2025

Industry payments by year
202526$21,779$22,721
202227$17,960$29,782
202111$3,390$3,390
202014$15,575$15,575
2019448$50,775$66,822

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
Novo NordiskNone$22,671
5 payments
  • Consulting · 2025-11-04 · $983
  • Travel · 2025-06-24 · $435
  • Consulting · 2025-06-24 · $20,796
  • Travel · 2025-06-24 · $307
  • Meals · 2025-06-24 · $150
Gilead SciencesNone$50
1 payment
  • Meals · 2025-11-09 · $50
See all 6 published payments
Every published payment
Gilead SciencesMeals · 2025-11-09None$50
Novo NordiskConsulting · 2025-11-04None$983
Novo NordiskTravel · 2025-06-24None$435
Novo NordiskConsulting · 2025-06-24None$20,796
Novo NordiskTravel · 2025-06-24None$307
Novo NordiskMeals · 2025-06-24None$150
See earlier years (2022, 2021, 2020, 2019)

2022: $29,782

Payments by company in 2022
Gilead SciencesEpclusa$29,702
6 payments
  • Consulting · 2022-10-04 · $3,080
  • Consulting for Epclusa · 2022-06-25 · $1,780
  • Consulting · 2022-05-25 · $10,900
  • Travel · 2022-03-09 · $11,742
  • Consulting · 2022-01-11 · $510
  • Consulting · 2022-01-11 · $1,690
Intercept PharmaceuticalsOcaliva$81
1 payment
  • Meals for Ocaliva · 2022-06-24 · $81

2021: $3,390

Payments by company in 2021
Gilead SciencesNone$3,390
1 payment
  • Consulting · 2021-11-03 · $3,390

2020: $15,575

Payments by company in 2020
Gilead SciencesVemlidy$15,575
4 payments
  • Consulting · 2020-12-14 · $4,740
  • Consulting · 2020-12-08 · $1,350
  • Consulting for Epclusa · 2020-11-02 · $2,710
  • Consulting for Vemlidy · 2020-10-19 · $6,775

2019: $66,822

Payments by company in 2019
Gilead SciencesVemlidy$63,260
43 payments
  • Consulting · 2019-12-10 · $2,500
  • Consulting · 2019-11-25 · $3,490
  • Consulting · 2019-11-19 · $1,000
  • Meals · 2019-11-11 · $113
  • Meals · 2019-11-10 · $62
  • Meals · 2019-11-07 · $77
  • Consulting · 2019-10-22 · $6,230
  • Consulting · 2019-10-15 · $12,480
  • Consulting · 2019-09-23 · $6,230
  • Meals · 2019-09-08 · $33
  • Meals · 2019-09-08 · $50
  • Meals · 2019-09-07 · $33
  • Meals · 2019-09-07 · $50
  • Meals · 2019-09-07 · $76
  • Travel · 2019-09-06 · $433
  • Travel · 2019-09-06 · $486
  • Travel · 2019-09-05 · $5,100
  • Travel · 2019-07-17 · $3,625
  • Travel · 2019-07-16 · $72
  • Travel · 2019-07-16 · $145
  • Travel · 2019-07-16 · $308
  • Meals · 2019-07-16 · $31
  • Meals · 2019-07-16 · $43
  • Travel · 2019-07-15 · $98
  • Travel · 2019-07-15 · $254
  • Travel · 2019-06-12 · $1,947
  • Meals · 2019-06-11 · $35
  • Meals · 2019-06-11 · $42
  • Travel · 2019-06-10 · $169
  • Travel · 2019-06-10 · $765
  • Meals · 2019-06-10 · $39
  • Consulting for Vemlidy · 2019-05-23 · $3,800
  • Travel for Vemlidy · 2019-05-23 · $60
  • Travel for Vemlidy · 2019-05-23 · $326
  • Meals for Vemlidy · 2019-05-23 · $4
  • Meals for Vemlidy · 2019-05-23 · $38
  • Meals for Vemlidy · 2019-05-23 · $49
  • Meals for Vemlidy · 2019-05-23 · $50
  • Consulting · 2019-05-22 · $1,430
  • Consulting · 2019-01-22 · $10,340
  • Travel · 2019-01-04 · $322
  • Travel · 2019-01-04 · $742
  • Meals · 2019-01-04 · $83
EisaiLenvima$1,958
2 payments
  • Consulting for Lenvima · 2019-02-15 · $1,875
  • Meals for Lenvima · 2019-01-17 · $83
Bayer HealthCare PharmaceuticalsStivarga$1,525
2 payments
  • Consulting for Stivarga · 2019-02-20 · $1,400
  • Meals for Stivarga · 2019-01-18 · $125
Salix Pharmaceuticals a division of Bausch Health USXifaxan$79
1 payment
  • Meals for Xifaxan · 2019-06-17 · $79

Research money

Money a company paid to run a study. Where it went to their institution, the clinician is named as an investigator and did not receive it; the amount covers the whole study, often across many sites.

Research payments by company and study
Roche TCRC, Inc. · Chb Patients With Chronic Hepatitis B · 2024Their institution$49,518

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.

Professional record

NPI
1114999570
Licence
AZ 70565, CA C131598, MN 37410California C131598: Current · expires 2028-03-31
Gender
Male
More record details
Sole proprietor
No
Medicaid ID
MN 171719700
Taxonomy
Federal specialty code 207RG0100X (207RG0100X)
Mailing address
13400 E Shea Blvd, Scottsdale, AZ, 85259
NPI first listed
2006-02-01
NPI last updated
2024-10-20
NPI record certified
2024-10-20

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

Extra NPI addresses: 1804 Embarcadero Rd, Palo Alto, CA, 94303 · 300 Pasteur Dr, Stanford, CA, 94305

This office lists an electronic records connection.