Gary Khammahavong, MD

Offices

1 location · Emergency Physicians Associates San Jose PC · 131 clinicians in this group

Looking this up.

Hospitals listed: Santa Clara Valley Medical Center. That is not proof they admit you there this week.

Plans that list them

1 plan · 1 carrier

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Khammahavong’s office at (408) 947-2500 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

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Plans whose provider directory lists this clinician

DualConnect (HMO D-SNP)	Santa Clara Family Health Plan	Listed	Sep 1, 2026

California Medical Board record

Licence A175022 · Current

Licensed to practise in California · since 2021 · expires 2027-09-30 · The Warren Alpert School of Medicine of Brown University.

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.

Santa Clara Valley Medical CenterSan Jose, CAAcute Care Hospital · Government - Local · Has an emergency department · Birthing-friendlyPart of Santa Clara Valley Health and Hospital System, which runs 3 hospitalsPatients rate it 3 of 5 · 70% would definitely recommend it
Overall rating: 2 of 5 starsWorse than the national rate — SSI - Colon Surgery: 2.572, Oct 2024 – Sep 2025Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.563, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.256, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0.369, Oct 2024 – Sep 2025

See every measure and the patient survey for Santa Clara Valley Medical Center

Behind the star rating — Deaths: 2 better, 6 the same, 0 worse of 8 measures. Safety: 2 better, 5 the same, 1 worse of 8 measures. Readmissions: 0 better, 10 the same, 1 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.

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Every scored measure at Santa Clara Valley Medical Center

SSI - Colon SurgeryInfections	2.572	Worse	Oct 2024 – Sep 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections	0.563	Better	Oct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections	0.256	Better	Oct 2024 – Sep 2025
MRSA BacteremiaInfections	0.369	Better	Oct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths	1.25 (0.3 to 2.2) · 1,535 cases	No different	Jul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths	1.07 (0.76 to 1.38)	No different	Jul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths	214.59 (167.38 to 261.8) · 108 cases	No different	Jul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths	2.8 · 41 cases	None	Jul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths	6 · 141 cases	None	Jul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths	10.2 · 124 cases	None	Jul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths	8.3 · 501 cases	None	Jul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths	14.9 · 653 cases	None	Jul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths	10.1 · 348 cases	None	Jul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths	3 · 4,502 cases	None	Jul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths	0.24 (0.04 to 0.43) · 9,014 cases	No different	Jul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths	0.34 (0.15 to 0.52) · 9,216 cases	No different	Jul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths	4.54 (2.51 to 6.58) · 1,421 cases	No different	Jul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths	1.54 (0 to 3.2) · 288 cases	No different	Jul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths	2.11 (0.66 to 3.56) · 1,446 cases	No different	Jul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths	11.61 (4.09 to 19.14) · 294 cases	No different	Jul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths	7.29 (3.39 to 11.2) · 299 cases	No different	Jul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths	1.9 (0.45 to 3.36) · 333 cases	No different	Jul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths	0.23 (0 to 0.78) · 7,538 cases	No different	Jul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths	5.4 · 94 cases	None	Apr 2023 – Mar 2025
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections	0.735	No different	Oct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections	2.573	No different	Oct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits	14.6 · 185 cases	None	Jul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits	22.1 · 951 cases	None	Jul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits	56.3 · 128 cases	None	Jul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits	6.4 · 644 cases	None	Jul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits	1.3 · 699 cases	None	Jul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits	16.3 · 921 cases	None	Jul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits	5.7 (3.9 to 8.1) · 226 cases	No different	Jan 2024 – Dec 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits	12.6 (9.4 to 16.5) · 226 cases	No different	Jan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits	5.4 · 94 cases	None	Jul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits	11.4 · 54 cases	None	Jul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits	20.3 · 242 cases	None	Jul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits	13.2 (9.9 to 17.4) · 702 cases	No different	Jan 2022 – Dec 2024
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits	1 (0.7 to 1.4) · 195 cases	No different	Jan 2024 – Dec 2024

What patients said (4,032 patients answered, 29% of those asked)

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Patient survey stars by topic at Santa Clara Valley Medical Center

Cleanliness	3
Nurse communication	3
Doctor communication	3
Communication about medicines	3
Discharge information	2
Overall hospital rating	3
Quietness	2
Recommend hospital	4

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Share of patients giving the best answer at Santa Clara Valley Medical Center

Room was "always" clean	70%
Nurses "always" communicated well	73%
Doctors "always" communicated well	76%
Staff "always" explained	57%
Yes, staff "did" give patients this information	82%
Yes, staff "did" give patients information about help after discharge	82%
Doctors "always" explained things so they could understand	71%
Doctors "always" listened carefully	74%
Doctors "always" treated them with courtesy and respect	82%
Patients who gave a rating of "9" or "10" (high)	67%
Staff "always" explained new medications	71%
Nurses "always" explained things so they could understand	71%
Nurses "always" listened carefully	69%
Nurses "always" treated them with courtesy and respect	80%
"Always" quiet at night	43%
"YES", patients would definitely recommend the hospital	70%
Staff "always" explained possible side effects	44%
Yes, staff "did" give patients information about possible symptoms	83%

Original Medicare doctor bills

$47,065

Medicare paid this office $47,065 for 343 people.

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

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Largest Original Medicare bills

Emergency department visit with high level of medical decision making	177	$23,438	$130
Critical care, first 30-74 minutes	68	$12,212	$180
Emergency department visit with moderate level of medical decision making	56	$5,310	$95
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	170	$1,142	$6

Procedures Medicare counted

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Procedure volume Medicare published

Removal of nail tissue	1-10	None

Who their Medicare patients are

343 Original Medicare patients in 2024. Average age 73 · Under 65 16% · 85 and older 16% · Women 51% · Also on Medicaid 74% · Health risk score 2.31. Above the middle of the specialty; the typical emergency medicine clinician is at 2.01.

Conditions among them: High blood pressure 75% · Diabetes 47% · Chronic kidney disease 36% · Depression 31% · Coronary heart disease 30% · Heart failure 30% · Atrial fibrillation 26% · Dementia 22% · COPD 21% · Cancer 13% · Stroke 13%.

The office billed $408,264, Medicare allowed $65,647 and paid $47,065; for 586 services of 40 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

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Original Medicare by year

2024	343	586	73	2.31	$408,264	$47,065
2023	384	683	75	2.65	$574,558	$56,946
2022	308	607	74	2.78	$483,095	$54,302
2021	141	193	72	1.66	$235,636	$22,289

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

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Original Medicare services billed in 2023

Emergency department visit with high level of medical decision making	174	$24,712	$137
Critical care, first 30-74 minutes	127	$21,814	$168
Emergency department visit with moderate level of medical decision making	61	$5,276	$86
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	201	$1,376	$6
X-ray of chest, 1 view	18	$112	$6

2022: 6 services

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Original Medicare services billed in 2022

Emergency department visit with high level of medical decision making	171	$26,907	$152
Critical care, first 30-74 minutes	86	$17,223	$200
Emergency department visit with moderate level of medical decision making	32	$3,083	$96
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	189	$1,577	$7
Emergency department visit with low level of medical decision making	14	$718	$51
X-ray of chest, 1 view	16	$121	$8

2021: 4 services

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Original Medicare services billed in 2021

Emergency department visit with high level of medical decision making	92	$14,659	$151
Critical care, first 30-74 minutes	28	$5,363	$185
Emergency department visit with moderate level of medical decision making	15	$1,484	$93
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	41	$276	$6

Medicaid work

$63,713 in 2024

Medicaid paid $63,713 for 2,300 billed services this clinician did in 2024, up to 87 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.

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Largest Medicaid services in 2024

EMERGENCY DEPARTMENT VISIT HIGH MDM	729	$31,496
EMERGENCY DEPT VISIT MOD MDM	705	$21,411
Service	104	$3,946
Critical care, evaluation and management of the critically ill or critically injured patient; first 30-74 minutes	78	$3,604
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only	485	$2,187
EMERGENCY DEPT VISIT LOW MDM	29	$401
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count	33	$293
ELECTROLYTE PANEL	28	$232
Creatinine; blood	28	$52
Blood glucose (sugar) level	27	$44
Service	26	$25
Urea nitrogen; quantitative	28	$22

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Medicaid work by year

2024	2,300	12	87	$63,713
2023	3,044	16	105	$112,494
2022	2,475	15	80	$100,756
2021	686	13	30	$30,766

See the largest Medicaid services in earlier years

2023

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Largest Medicaid services in 2023

EMERGENCY DEPARTMENT VISIT HIGH MDM	672	$38,746
EMERGENCY DEPT VISIT MOD MDM	801	$38,300
Critical care, evaluation and management of the critically ill or critically injured patient; first 30-74 minutes	141	$11,490
Service	306	$11,362
EMERGENCY DEPT VISIT LOW MDM	119	$4,718
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only	445	$3,321
Service	152	$1,406
Service(s) provided between 10:00 PM and 8:00 AM at 24-hour facility, in addition to basic service	148	$1,185
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count	126	$1,063
Radiologic examination, chest; single view	52	$474
COMPREHENSIVE METABOLIC PANEL	12	$135
Basic metabolic panel (Calcium, total) This panel must include the following: Calcium, total (82310) Carbon dioxide (bicarbonate) (82374) Chloride (82435) Creatinine (82565) Glucose (82947) Potassium (84132) Sodium (84295) Urea nitrogen (BUN) (84520)	14	$134

2022

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Largest Medicaid services in 2022

EMERGENCY DEPARTMENT VISIT HIGH MDM	577	$37,667
EMERGENCY DEPT VISIT MOD MDM	488	$24,161
EMERGENCY DEPT VISIT LOW MDM	395	$19,401
Service	193	$7,130
Critical care, evaluation and management of the critically ill or critically injured patient; first 30-74 minutes	81	$5,907
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only	414	$2,956
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count	127	$864
Service	64	$801
Unlisted special service, procedure or report	12	$622
Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); intravenous push, single or initial substance/drug	13	$383
Electrocardiogram, routine ECG with at least 12 leads; tracing only, without interpretation and report	33	$306
Troponin, quantitative	15	$237

2021

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Largest Medicaid services in 2021

EMERGENCY DEPARTMENT VISIT HIGH MDM	220	$14,385
EMERGENCY DEPT VISIT LOW MDM	121	$8,816
EMERGENCY DEPT VISIT MOD MDM	78	$5,658
Infectious agent detection by nucleic acid (DNA or RNA); severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (coronavirus disease [COVID-19]) and influenza virus types A and B, multiplex amplified probe technique	13	$1,091
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count	58	$183
Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); intravenous push, single or initial substance/drug	17	$172
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only	31	$158
COMPREHENSIVE METABOLIC PANEL	20	$106
Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); each additional sequential intravenous push of a new substance/drug (List separately in addition to code for primary procedure)	14	$78
Radiologic examination, chest; single view	13	$61
Electrocardiogram, routine ECG with at least 12 leads; tracing only, without interpretation and report	16	$58
Non-covered item or service	52	$0

Drugs they prescribed that Part D paid

$3,555

Pharmacies billed $3,555 in 2024.

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

Opioids were 5% of their Part D prescriptions (11 of 211) in 2024. At or below the middle of the specialty; the typical emergency medicine clinician is at 12%.

192 generic and 19 brand-name prescriptions · $3,555 in drug cost · 93 antibiotic prescriptions to 69 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.

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Largest Part D drug costs

Cephalexin	29	$121	$4
Amoxicillin-Clavulanate Potass	24	$114	$5
Ondansetron Odt	11	$54	$5
Prednisone	20	$40	$2
Sulfamethoxazole-Trimethoprim	13	$31	$2

See all 6 drugs

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Every Part D drug this clinician prescribed

Cephalexin	29	$121	$4
Amoxicillin-Clavulanate Potass	24	$114	$5
Ondansetron Odt	11	$54	$5
Prednisone	20	$40	$2
Sulfamethoxazole-Trimethoprim	13	$31	$2
Azithromycin	12	$24	$2

Year by year

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Part D prescribing by year

2024	211	130	5% (11)	9%	$3,555
2023	128	89	None	None	$2,317
2022	112	88	None	None	$763
2021	88	65	None	None	$1,463
2020	40	30	None	None	$312
2019	31	24	None	None	$616
2018	11	None	0% (0)	None	$70

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

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Part D drugs prescribed in 2023

Cephalexin	33	$277	$8
Ciprofloxacin	14	$111	$8
Ondansetron Odt	13	$96	$7

2022: 3 drugs

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Part D drugs prescribed in 2022

Cephalexin	28	$204	$7
Sulfamethoxazole-Trimethoprim	13	$43	$3
Prednisone	11	$20	$2

2021: 3 drugs

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Part D drugs prescribed in 2021

Amoxicillin-Clavulanate Potass	13	$174	$13
Cephalexin	16	$86	$5
Prednisone	11	$18	$2

Money from drug and device companies

$15 in 2024

A payment is not proof that care is biased.

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Payments by company

Abbvie	Dalvance	$15	1 payment Meals for Dalvance · 2024-01-09 · $15

See the published payment

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Every published payment

Abbvie	Meals · 2024-01-09	Dalvance	$15

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score: 89.3 / 100; Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI: 1760989636
Licence: CA A175022, PA MD474559California A175022: Current · expires 2027-09-30
Trained: Warren Alpert Medical School of Brown University, 2018
Group: Emergency Physicians Associates San Jose PC
Gender: Male

More record details

Sole proprietor: No
Taxonomy: Federal specialty code 207P00000X (207P00000X); Student in a training program (390200000X)
Mailing address: 185 39th St Apt D104, Pittsburgh, PA, 15201
NPI first listed: 2018-04-09
NPI last updated: 2022-03-02
NPI record certified: 2022-03-02

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