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Errol O Ozdalga, MD

Internal Medicine · Stanford

NPI 1982851499

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
5
2 carriers
Offices
2
Since medical school
18 years
New York Medical College, 2008

Offices

2 locations · 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.

Plans that list them

5 plans · 2 carriers

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Ozdalga’s office to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

5 of 5 plans

Plans whose provider directory lists this clinician
SCAN Balance (HMO C-SNP)SCAN Health PlanListedOct 3, 2026
SCAN Classic (HMO)SCAN Health PlanListedOct 3, 2026
SCAN MyChoice (HMO)SCAN Health PlanListedOct 3, 2026
SCAN Strive (HMO C-SNP)SCAN Health PlanListedOct 3, 2026
DualConnect (HMO D-SNP)Santa Clara Family Health PlanListedSep 1, 2026

California Medical Board record

Licence A108902 · Current

Licensed to practise in California · since 2009 · expires 2027-01-31 · New York Medical College.

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

$60,120

Medicare paid this office $60,120 for 140 people.

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

Largest Original Medicare bills
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes103$33,755$105
Initial hospital care with moderate level of medical decision making at least 75 minutes90$14,702$153
Hospital discharge day management, more than 30 minutes98$10,430$104

Who their Medicare patients are

140 Original Medicare patients in 2024. Average age 77 · Under 65 14% · 85 and older 31% · Women 50% · Also on Medicaid 46% · Health risk score 2.86. Above the middle of the specialty; the typical internal medicine clinician is at 1.76.

Conditions among them: High blood pressure 75% · Chronic kidney disease 55% · Coronary heart disease 46% · Heart failure 45% · Diabetes 43% · Dementia 43% · Atrial fibrillation 41% · Depression 31% · COPD 25% · Cancer 24% · Stroke 24%.

The office billed $253,100, Medicare allowed $76,022 and paid $60,120; for 527 services of 8 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
2024140527772.86$253,100$60,120
2023151629763.30$262,065$68,226
2022211712773.08$309,957$77,397
2021216724732.90$320,428$82,346
2020184682733.11$293,934$77,307
2019219660733.00$295,581$73,484
2018218680743.20$258,474$68,291
2017198667732.72$244,497$65,552
2016195624752.77$227,670$61,166
2015228791743.06$275,678$75,645
2014247854722.70$319,721$87,118
2013255861722.48$307,124$82,723

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: 4 services

Original Medicare services billed in 2023
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes84$31,538$110
Initial hospital care with moderate level of medical decision making at least 75 minutes91$15,186$162
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes42$10,944$73
Hospital discharge day management, more than 30 minutes91$9,907$107

2022: 5 services

Original Medicare services billed in 2022
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes141$39,788$94
Initial hospital care with moderate level of medical decision making at least 75 minutes99$17,939$178
Hospital discharge day management, more than 30 minutes87$8,445$96
Initial hospital observation care per day, typically 70 minutes25$4,282$171
Hospital observation care on day of discharge22$1,501$68

2021: 6 services

Original Medicare services billed in 2021
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes124$39,443$95
Initial hospital care with moderate level of medical decision making at least 75 minutes108$20,136$185
Hospital discharge day management, more than 30 minutes109$11,266$100
Initial hospital observation care per day, typically 70 minutes22$4,274$178
Initial hospital care with same-day admission and discharge with high level of medical decision making, per day at least 85 minutes18$3,757$198
Hospital observation care on day of discharge20$1,562$74

2020: 5 services

Original Medicare services billed in 2020
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes121$39,651$97
Initial hospital care with moderate level of medical decision making at least 75 minutes101$20,133$186
Hospital discharge day management, more than 30 minutes101$10,489$100
Initial hospital care with same-day admission and discharge with high level of medical decision making, per day at least 85 minutes15$3,368$211
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes18$1,966$68

2019: 7 services

Original Medicare services billed in 2019
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes115$28,219$94
Initial hospital care with moderate level of medical decision making at least 75 minutes120$22,759$184
Hospital discharge day management, more than 30 minutes105$10,405$99
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes35$3,970$62
Initial hospital care with same-day admission and discharge with high level of medical decision making, per day at least 85 minutes17$3,359$198
Initial hospital observation care per day, typically 70 minutes11$1,853$168
Hospital observation care on day of discharge12$810$68

2018: 8 services

Original Medicare services billed in 2018
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes92$19,286$94
Initial hospital care with moderate level of medical decision making at least 75 minutes92$17,249$182
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes82$12,768$65
Hospital discharge day management, more than 30 minutes46$4,641$99
Initial hospital care with same-day admission and discharge with high level of medical decision making, per day at least 85 minutes21$4,315$196
Initial hospital observation care per day, typically 70 minutes21$3,658$166
Hospital discharge day management, 30 minutes or less53$3,553$66
Hospital observation care on day of discharge19$1,270$64

2017: 8 services

Original Medicare services billed in 2017
Initial hospital care with moderate level of medical decision making at least 75 minutes101$19,270$180
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes78$14,558$64
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes67$14,022$93
Hospital discharge day management, more than 30 minutes44$4,419$96
Hospital discharge day management, 30 minutes or less64$4,240$66
Initial hospital care with same-day admission and discharge with high level of medical decision making, per day at least 85 minutes17$3,317$195
Initial hospital observation care per day, typically 70 minutes18$2,850$158
Hospital observation care on day of discharge17$1,128$66

2016: 7 services

Original Medicare services billed in 2016
Initial hospital care with moderate level of medical decision making at least 75 minutes104$19,026$178
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes98$13,953$64
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes65$13,796$93
Hospital discharge day management, 30 minutes or less68$4,536$66
Initial hospital care with same-day admission and discharge with high level of medical decision making, per day at least 85 minutes17$3,292$194
Hospital discharge day management, more than 30 minutes30$2,917$97
Hospital observation care on day of discharge12$790$66

2015: 6 services

Original Medicare services billed in 2015
Initial hospital care with moderate level of medical decision making at least 75 minutes130$23,868$178
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes128$18,580$64
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes101$17,776$93
Hospital discharge day management, 30 minutes or less86$5,744$65
Hospital discharge day management, more than 30 minutes41$4,296$98
Initial hospital care with same-day admission and discharge with high level of medical decision making, per day at least 85 minutes11$2,140$195

2014: 8 services

Original Medicare services billed in 2014
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes128$32,624$92
Initial hospital care with moderate level of medical decision making at least 75 minutes130$23,899$178
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes88$11,785$64
Hospital discharge day management, more than 30 minutes67$6,565$97
Initial hospital care with same-day admission and discharge with high level of medical decision making, per day at least 85 minutes21$4,058$193
Hospital discharge day management, 30 minutes or less43$2,816$65
Initial hospital observation care per day, typically 70 minutes13$2,138$164
Hospital observation care on day of discharge13$848$65

2013: 6 services

Original Medicare services billed in 2013
Initial hospital care with moderate level of medical decision making at least 75 minutes156$27,975$175
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes102$19,780$90
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes115$17,212$62
Hospital discharge day management, 30 minutes or less96$6,272$64
Hospital discharge day management, more than 30 minutes56$5,400$95
Initial hospital care with same-day admission and discharge with high level of medical decision making, per day at least 85 minutes12$2,256$188

Medicaid work

$12,557 in 2024

Medicaid paid $12,557 for 328 billed services this clinician did in 2024, up to 20 people in a month for one service.

Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.

Largest Medicaid services in 2024
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES262$9,871
Hospital inpatient or observation discharge day management; more than 30 minutes on the date of the encounter48$1,558
1ST HOSP IP/OBS HIGH 7518$1,129
Medicaid work by year
2024328320$12,557
2023585420$22,708
2022583326$19,386
2021654330$22,985
2020406317$11,487
2019148319$5,176
201812112$621
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES379$13,970
1ST HOSP IP/OBS HIGH 7578$4,267
SBSQ HOSPITAL IP/OBS CARE MOD MDM 35 MINUTES88$3,223
Hospital inpatient or observation discharge day management; more than 30 minutes on the date of the encounter40$1,249

2022

Largest Medicaid services in 2022
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES474$14,787
1ST HOSP IP/OBS HIGH 7566$2,888
Hospital inpatient or observation discharge day management; more than 30 minutes on the date of the encounter43$1,711

2021

Largest Medicaid services in 2021
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES449$13,438
1ST HOSP IP/OBS HIGH 75124$6,825
Hospital inpatient or observation discharge day management; more than 30 minutes on the date of the encounter81$2,722

2020

Largest Medicaid services in 2020
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES307$7,170
1ST HOSP IP/OBS HIGH 7573$3,521
Hospital inpatient or observation discharge day management; more than 30 minutes on the date of the encounter26$796

2019

Largest Medicaid services in 2019
1ST HOSP IP/OBS HIGH 7549$2,892
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES70$1,501
Hospital inpatient or observation discharge day management; more than 30 minutes on the date of the encounter29$783

2018

Largest Medicaid services in 2018
1ST HOSP IP/OBS HIGH 7512$621

Drugs they prescribed that Part D paid

$23,054

Pharmacies billed $23,054 in 2024.

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

167 generic and fewer than 11 brand-name prescriptions · $23,054 in drug cost · 58 antibiotic prescriptions to 12 people.

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
Cefepime42$10,167$242
Eliquis11$6,804$619

Year by year

Part D prescribing by year
202419961NoneNone$23,054
202314848NoneNone$24,572
202216164NoneNone$21,504
202116473None21%$21,922
2020249820% (0)None$18,820
2019201716% (12)None$24,900
201828595NoneNone$32,898
2017268102NoneNone$41,550
201626286NoneNone$25,842
2015291106NoneNone$30,228
2014293854% (11)None$41,679
201327497NoneNone$27,525

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

See the drugs prescribed each year

2023: 1 drug

Part D drugs prescribed in 2023
Eliquis14$8,579$613

2022: 1 drug

Part D drugs prescribed in 2022
Atorvastatin11$65$6

2021: 2 drugs

Part D drugs prescribed in 2021
Eliquis12$9,200$767
Furosemide11$27$2

2020: 2 drugs

Part D drugs prescribed in 2020
Pantoprazole13$295$23
Atorvastatin13$88$7

2019: 1 drug

Part D drugs prescribed in 2019
Ampicillin-Sulbactam13$2,423$186

2018: 6 drugs

Part D drugs prescribed in 2018
Pantoprazole11$245$22
Azithromycin12$127$11
Gabapentin11$87$8
Ciprofloxacin11$75$7
Prednisone11$61$6
Furosemide15$60$4

2017: 1 drug

Part D drugs prescribed in 2017
Ciprofloxacin12$94$8

2016: 3 drugs

Part D drugs prescribed in 2016
Humalog11$4,411$401
Sulfamethoxazole-Trimethoprim20$55$3
Furosemide20$40$2

2015: 4 drugs

Part D drugs prescribed in 2015
Sodium Chloride11$155$14
Atorvastatin11$124$11
Pantoprazole13$122$9
Ciprofloxacin11$54$5

2014: 2 drugs

Part D drugs prescribed in 2014
Lactulose20$372$19
Amlodipine Besylate11$52$5

2013: 1 drug

Part D drugs prescribed in 2013
Furosemide12$63$5

Professional record

NPI
1982851499
Licence
CA A108902California A108902: Current · expires 2027-01-31
Trained
New York Medical College, 2008 · 18 years ago
Gender
Male
More record details
Sole proprietor
No
Taxonomy
Internal medicine (207R00000X)
Mailing address
300 Pasteur Dr, Stanford, CA, 94305
NPI first listed
2008-08-26
NPI last updated
2024-04-22
NPI record certified
2024-04-22

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

Extra NPI addresses: 1804 Embarcadero Rd, Palo Alto, CA, 94303