Ruby E Koshy, MD | UniHealth

Offices

5 locations · Sutter Bay Medical Foundation · Faculty Physicians and Surgeons of Llusm

Looking this up.

Hospitals listed: Riverside University Health System-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. Koshy’s office 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 A105884 · Current

Licensed to practise in California · since 2008 · expires 2028-01-31 · Mangalore University, Kasturba Medical College.

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.

Riverside University Health System-Medical CenterMoreno Valley, CAAcute Care Hospital · Government - Local · Has an emergency department · Birthing-friendlyPart of Riverside University Health SystemPatients rate it 2 of 5 · 66% would definitely recommend it
Overall rating: 3 of 5 starsBetter than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.232, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.157, Oct 2024 – Sep 2025

See every measure and the patient survey for Riverside University Health System-Medical Center

Behind the star rating — Deaths: 0 better, 6 the same, 0 worse of 6 measures. Safety: 4 better, 3 the same, 0 worse of 7 measures. Readmissions: 0 better, 7 the same, 1 worse of 8 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 Riverside University Health System-Medical Center

Central Line Associated Bloodstream Infection (ICU + select Wards)Infections	0.232	Better	Oct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections	0.157	Better	Oct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths	1.38 (0.38 to 2.38) · 932 cases	No different	Jul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths	0.93 (0.56 to 1.3)	No different	Jul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths	191.06 (136.87 to 245.25) · 59 cases	No different	Jul 2022 – Jun 2024
Death rate for COPD patientsComplications and deaths	9.1 · 77 cases	None	Jul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths	11.5 · 25 cases	None	Jul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths	7.7 · 140 cases	None	Jul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths	13.7 · 148 cases	None	Jul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths	11.1 · 184 cases	None	Jul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths	3.1 · 2,070 cases	None	Jul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths	0.24 (0.02 to 0.46) · 4,158 cases	No different	Jul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths	0.35 (0.15 to 0.55) · 4,169 cases	No different	Jul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths	3.45 (1.15 to 5.76) · 582 cases	No different	Jul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths	1.6 (0 to 3.29) · 126 cases	No different	Jul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths	1.98 (0.38 to 3.58) · 580 cases	No different	Jul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths	9.8 (0.71 to 18.89) · 135 cases	No different	Jul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths	4.67 (0.57 to 8.78) · 125 cases	No different	Jul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths	1.67 (0.18 to 3.16) · 159 cases	No different	Jul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths	0.38 (0 to 1.09) · 3,702 cases	No different	Jul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths	4.1 · 48 cases	None	Apr 2023 – Mar 2025
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections	0.517	No different	Oct 2024 – Sep 2025
MRSA BacteremiaInfections	1.484	No different	Oct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections	0.896	No different	Oct 2024 – Sep 2025
SSI - Colon SurgeryInfections	0.404	No different	Oct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits	15 · 46 cases	None	Jul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits	22.1 · 303 cases	None	Jul 2023 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits	7.1 · 162 cases	None	Jul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits	1 · 164 cases	None	Jul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits	19 · 290 cases	None	Jul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits	6 (3.8 to 9.1) · 36 cases	No different	Jan 2024 – Dec 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits	11.9 (8.1 to 16.7) · 36 cases	No different	Jan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits	5.8 · 60 cases	None	Jul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits	20.2 · 151 cases	None	Jul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits	12.6 (9.3 to 17) · 127 cases	No different	Jan 2022 – Dec 2024

What patients said (416 patients answered, 10% of those asked)

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Patient survey stars by topic at Riverside University Health System-Medical Center

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

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Share of patients giving the best answer at Riverside University Health System-Medical Center

Room was "always" clean	63%
Nurses "always" communicated well	73%
Doctors "always" communicated well	74%
Staff "always" explained	54%
Yes, staff "did" give patients this information	85%
Yes, staff "did" give patients information about help after discharge	86%
Doctors "always" explained things so they could understand	69%
Doctors "always" listened carefully	72%
Doctors "always" treated them with courtesy and respect	82%
Patients who gave a rating of "9" or "10" (high)	65%
Staff "always" explained new medications	72%
Nurses "always" explained things so they could understand	69%
Nurses "always" listened carefully	69%
Nurses "always" treated them with courtesy and respect	81%
"Always" quiet at night	46%
"YES", patients would definitely recommend the hospital	66%
Staff "always" explained possible side effects	37%
Yes, staff "did" give patients information about possible symptoms	84%

Original Medicare doctor bills

$8,058

Medicare paid this office $8,058 for 83 people.

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

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Largest Original Medicare bills

Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes	30	$1,974	$66
Measurement of brain wave activity (eeg), awake and drowsy	16	$722	$45

Who their Medicare patients are

83 Original Medicare patients in 2024. Average age 68 · Under 65 29% · Women 54% · Also on Medicaid 75% · Health risk score 2.39. Sicker patients than 9 in 10 peers; the typical neurology clinician is at 1.61.

Conditions among them: High blood pressure 75% · Diabetes 51% · Stroke 48% · Depression 47% · Chronic kidney disease 31% · Coronary heart disease 30% · Heart failure 27% · Dementia 25% · COPD 24% · Atrial fibrillation 24%.

The office billed $37,737, Medicare allowed $10,946 and paid $8,058; for 125 services of 23 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	83	125	68	2.39	$37,737	$8,058
2023	75	123	67	2.15	$32,210	$6,999
2022	85	118	69	2.43	$36,440	$8,919
2021	108	133	67	2.16	$41,830	$9,397
2020	102	151	69	2.63	$45,704	$11,752
2019	87	122	64	2.24	$42,760	$9,614
2018	100	157	67	2.10	$53,540	$11,455
2017	108	149	65	2.27	$44,195	$10,415
2016	120	194	66	2.42	$54,680	$13,384
2015	125	234	66	2.27	$85,175	$21,737
2014	143	262	67	2.41	$102,495	$25,424
2013	112	183	66	2.70	$56,340	$12,978

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: 3 services

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Original Medicare services billed in 2023

Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes	25	$1,614	$65
Muscle electrical test	12	$440	$34
Muscle electrical test	11	$219	$14

2022: 2 services

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Original Medicare services billed in 2022

Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes	29	$2,430	$81
Return visit (30+ min)	13	$971	$69

2021: 2 services

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Original Medicare services billed in 2021

Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes	40	$3,213	$77
Measurement of brain wave activity (eeg), awake and drowsy	13	$634	$49

2020: 3 services

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Original Medicare services billed in 2020

Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes	27	$2,939	$86
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	22	$2,462	$107
Return visit (30+ min)	12	$1,003	$67

2019: 4 services

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Original Medicare services billed in 2019

Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	26	$2,755	$102
New patient visit (45+ min)	14	$1,169	$83
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes	12	$916	$76
Return visit (30+ min)	11	$781	$60

2018: 2 services

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Original Medicare services billed in 2018

Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	47	$5,070	$97
Return visit (30+ min)	17	$1,262	$60

2017: 3 services

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Original Medicare services billed in 2017

Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes	48	$3,894	$76
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	17	$1,994	$111
Short return visit (20+ min)	17	$703	$33

2016: 4 services

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Original Medicare services billed in 2016

Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes	59	$4,961	$80
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	12	$1,329	$111
Measurement of brain wave activity (eeg), awake and drowsy	18	$854	$47
Measurement of brain wave activity (eeg), awake and asleep	12	$569	$47

2015: 5 services

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Original Medicare services billed in 2015

Initial hospital care with moderate level of medical decision making at least 75 minutes	32	$6,000	$162
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	42	$5,619	$110
Measurement of brain wave activity (eeg), awake and drowsy	32	$1,545	$45
Return visit (30+ min)	13	$1,009	$59
Measurement of brain wave activity (eeg), awake and asleep	16	$749	$47

2014: 4 services

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Original Medicare services billed in 2014

Initial hospital care with moderate level of medical decision making at least 75 minutes	42	$7,978	$163
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	39	$4,287	$105
Measurement of brain wave activity (eeg), awake and drowsy	37	$1,840	$47
Measurement of brain wave activity (eeg), awake and asleep	22	$1,013	$46

2013: 4 services

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Original Medicare services billed in 2013

Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	45	$4,700	$100
Measurement of brain wave activity (eeg), awake and drowsy	38	$1,922	$44
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes	11	$1,026	$79
Short return visit (20+ min)	15	$588	$28

Medicaid work

$2,001 in 2024

Medicaid paid $2,001 for 40 billed services this clinician did in 2024, up to 14 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

Muscle electrical test	26	$1,031
1ST HOSP IP/OBS SF/LOW 40	14	$970

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Medicaid work by year

2024	40	2	14	$2,001
2023	58	2	17	$2,861
2022	26	2	14	$1,777
2021	42	2	14	$3,637
2020	14	1	14	$949
2019	83	2	16	$7,349
2018	277	3	28	$21,306

See the largest Medicaid services in earlier years

2023

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Largest Medicaid services in 2023

Muscle electrical test	44	$1,692
Return visit (30+ min)	14	$1,169

2022

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Largest Medicaid services in 2022

Return visit (30+ min)	12	$1,147
Muscle electrical test	14	$630

2021

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Largest Medicaid services in 2021

1ST HOSP IP/OBS SF/LOW 40	30	$2,360
Return visit (30+ min)	12	$1,277

2020

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Largest Medicaid services in 2020

Return visit (30+ min)	14	$949

2019

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Largest Medicaid services in 2019

Return visit (30+ min)	70	$5,716
New patient visit (45+ min)	13	$1,633

2018

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Largest Medicaid services in 2018

Return visit (30+ min)	186	$13,472
1ST HOSPITAL IP/OBS CARE MODERATE MDM 55 MINUTES	65	$6,444
Short return visit (20+ min)	26	$1,390

Drugs they prescribed that Part D paid

$31,748

Pharmacies billed $31,748 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 78) in 2024. At or below the middle of the specialty; the typical neurology clinician is at 0%.

64 generic and 14 brand-name prescriptions · $31,748 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.

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Largest Part D drug costs

Topiramate	21	$157	$7

Year by year

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Part D prescribing by year

2024	78	19	0% (0)	18%	$31,748
2023	66	19	0% (0)	None	$18,527
2022	63	20	0% (0)	None	$10,293
2021	104	24	0% (0)	None	$26,749
2020	78	23	0% (0)	None	$28,978
2019	54	19	0% (0)	None	$22,501
2018	123	25	0% (0)	10%	$75,090
2017	162	26	0% (0)	17%	$183,490
2016	201	30	0% (0)	19%	$192,879
2015	213	35	0% (0)	None	$199,389
2014	158	23	0% (0)	None	$60,127
2013	109	16	0% (0)	None	$8,490

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

See the drugs prescribed each year

2023: 2 drugs

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Part D drugs prescribed in 2023

Mycophenolate Mofetil	12	$535	$45
Topiramate	16	$227	$14

2022: 1 drug

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Part D drugs prescribed in 2022

Gabapentin	11	$279	$25

2021: 1 drug

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Part D drugs prescribed in 2021

Azathioprine	14	$651	$47

2020: 1 drug

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Part D drugs prescribed in 2020

Gabapentin	13	$192	$15

2018: 2 drugs

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Part D drugs prescribed in 2018

Pyridostigmine	16	$1,352	$84
Levetiracetam	30	$1,300	$43

2017: 3 drugs

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Part D drugs prescribed in 2017

Tecfidera	16	$111,156	$6,947
Levetiracetam	15	$1,212	$81
Pyridostigmine	13	$1,094	$84

2016: 5 drugs

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Part D drugs prescribed in 2016

Tecfidera	30	$186,437	$6,215
Levetiracetam	35	$872	$25
Carbidopa-Levodopa	16	$693	$43
Gabapentin	22	$416	$19
Prednisone	15	$127	$8

2015: 7 drugs

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Part D drugs prescribed in 2015

Tecfidera	27	$152,086	$5,633
Carbidopa-Levodopa	27	$1,263	$47
Levetiracetam	26	$1,051	$40
Pyridostigmine	15	$814	$54
Phenytoin Sodium Extended	11	$495	$45
Gabapentin	12	$221	$18
Topiramate	13	$122	$9

2014: 3 drugs

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Part D drugs prescribed in 2014

Levetiracetam	62	$3,330	$54
Topiramate	21	$434	$21
Carbamazepine	12	$156	$13

2013: 2 drugs

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Part D drugs prescribed in 2013

Levetiracetam	56	$2,761	$49
Topiramate	12	$274	$23

Money from drug and device companies

$122 in 2025

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Industry payments by year

2025	2	2	None	$122
2024	2	5	None	$141
2023	3	3	None	$160
2021	2	3	None	$135

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

A payment is not proof that care is biased.

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Payments by company

Boston Scientific	General - Dbs	$104	1 payment Meals for General - Dbs · 2025-04-09 · $104
Alexion Pharmaceuticals	None	$19	1 payment Meals · 2025-06-12 · $19

See all 2 published payments

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Every published payment

Alexion Pharmaceuticals	Meals · 2025-06-12	None	$19
Boston Scientific	Meals · 2025-04-09	General - Dbs	$104

See earlier years (2024, 2023, 2021)

2024: $141

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Payments by company in 2024

Abbvie	Botox	$107	4 payments Meals for Botox · 2024-10-17 · $28 Meals for Botox · 2024-10-03 · $29 Meals for Ubrelvy · 2024-06-20 · $25 Meals for Duopa · 2024-06-08 · $25
Argenx US	Vyvgart	$34	1 payment Meals for Vyvgart · 2024-05-20 · $34

2023: $160

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Payments by company in 2023

Abbvie	Botox	$78	1 payment Meals for Botox · 2023-11-03 · $78
Argenx US	Vyvgart	$65	1 payment Meals for Vyvgart · 2023-05-24 · $65
Novartis Pharmaceuticals	Kesimpta	$17	1 payment Meals for Kesimpta · 2023-09-26 · $17

2021: $135

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Payments by company in 2021

Viz.ai	Viz.Ai Lvo	$111	1 payment Meals for Viz.Ai Lvo · 2021-10-28 · $111
Novartis Pharmaceuticals	Kesimpta	$24	2 payments Meals for Kesimpta · 2021-10-21 · $12 Meals for Kesimpta · 2021-09-10 · $12

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score: 85.2 / 100; Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI: 1578741369
Licence: CA A105884California A105884: Current · expires 2028-01-31
Group: Sutter Bay Medical Foundation · Faculty Physicians and Surgeons of Llusm
Gender: Female

More record details

Sole proprietor: No
Taxonomy: Neurology (2084N0400X)
Mailing address: Po Box 276950, Sacramento, CA, 95827
NPI first listed: 2008-02-05
NPI last updated: 2026-05-15
NPI record certified: 2026-05-15

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