Margaret E Bates, MD

Offices

3 locations · Pih Health Physicians · 616 clinicians in this group

Looking this up.

Hospitals listed: USC Verdugo Hills 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. Bates’s office to ask if they take your plan before you enroll.

California Medical Board record

Licence G50676 · Current

Licensed to practise in California · since 1983 · expires 2028-08-31 · University of Southern California Keck School of Medicine.

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

School, training and certification

What this clinician told their state board, medical school and everything before it. Only some states publish this, so nothing here means the state does not say, not that there was no training or certification.

Specialty certification

American Board of Obstetrics and Gynecology - Obstetrics and Gynecology

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.

USC Verdugo Hills HospitalGlendale, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of University of Southern California, which runs 4 hospitalsPatients rate it 3 of 5 · 65% would definitely recommend it
Overall rating: 4 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.19, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.7 (0.5 to 1) · 396 cases, Jan 2024 – Dec 2024

See every measure and the patient survey for USC Verdugo Hills Hospital

Behind the star rating — Deaths: 2 better, 5 the same, 0 worse of 7 measures. Safety: 1 better, 6 the same, 0 worse of 7 measures. Readmissions: 1 better, 4 the same, 2 worse of 7 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 USC Verdugo Hills Hospital

Clostridium Difficile (C.Diff)Infections	0.19	Better	Oct 2024 – Sep 2025
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits	0.7 (0.5 to 1) · 396 cases	Better	Jan 2024 – Dec 2024
Abdominopelvic accidental puncture or laceration rateComplications and deaths	0.92 (0 to 1.94) · 627 cases	No different	Jul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths	0.9 (0.51 to 1.28)	No different	Jul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths	171.68 (110.02 to 233.35) · 27 cases	No different	Jul 2022 – Jun 2024
Death rate for COPD patientsComplications and deaths	8.4 · 73 cases	None	Jul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths	12 · 48 cases	None	Jul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths	7.4 · 246 cases	None	Jul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths	11.3 · 343 cases	None	Jul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths	10.8 · 70 cases	None	Jul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths	3.7 · 1,469 cases	None	Jul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths	0.18 (0 to 0.4) · 3,522 cases	No different	Jul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths	0.24 (0.03 to 0.44) · 3,622 cases	No different	Jul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths	3.54 (1.21 to 5.88) · 541 cases	No different	Jul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths	1.45 (0 to 3.06) · 163 cases	No different	Jul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths	2.66 (1.03 to 4.29) · 511 cases	No different	Jul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths	11.7 (2.76 to 20.64) · 218 cases	No different	Jul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths	4.55 (0.5 to 8.6) · 189 cases	No different	Jul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths	1.69 (0.19 to 3.2) · 181 cases	No different	Jul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths	0.22 (0 to 1.01) · 2,841 cases	No different	Jul 2022 – Jun 2024
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections	0.263	No different	Oct 2024 – Sep 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections	1.733	No different	Oct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits	14.2 · 48 cases	None	Jul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits	21.6 · 273 cases	None	Jul 2023 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits	2.6 · 298 cases	None	Jul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits	28.2 · 377 cases	None	Jul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits	17 · 392 cases	None	Jul 2023 – Jun 2025
Rate of readmission after hip/knee replacementUnplanned return visits	5.3 · 25 cases	None	Jul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits	20.9 · 90 cases	None	Jul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits	11.2 (8.5 to 14.8) · 881 cases	No different	Jan 2022 – Dec 2024

What patients said (413 patients answered, 23% of those asked)

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Patient survey stars by topic at USC Verdugo Hills Hospital

Cleanliness	4
Nurse communication	3
Doctor communication	2
Communication about medicines	3
Discharge information	3
Overall hospital rating	3
Quietness	1
Recommend hospital	3

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Share of patients giving the best answer at USC Verdugo Hills Hospital

Room was "always" clean	77%
Nurses "always" communicated well	76%
Doctors "always" communicated well	75%
Staff "always" explained	60%
Yes, staff "did" give patients this information	84%
Yes, staff "did" give patients information about help after discharge	82%
Doctors "always" explained things so they could understand	73%
Doctors "always" listened carefully	74%
Doctors "always" treated them with courtesy and respect	80%
Patients who gave a rating of "9" or "10" (high)	64%
Staff "always" explained new medications	71%
Nurses "always" explained things so they could understand	72%
Nurses "always" listened carefully	74%
Nurses "always" treated them with courtesy and respect	82%
"Always" quiet at night	36%
"YES", patients would definitely recommend the hospital	65%
Staff "always" explained possible side effects	49%
Yes, staff "did" give patients information about possible symptoms	85%

Original Medicare doctor bills

$4,660

Medicare paid this office $4,660 for 72 people.

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

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Largest Original Medicare bills

Cervical or vaginal cancer screening; pelvic and clinical breast examination	44	$1,866	$42
Short return visit	17	$974	$42
Short return visit (20+ min)	12	$821	$68

Who their Medicare patients are

72 Original Medicare patients in 2024. Average age 75 · Women 100% · Health risk score 0.76. At or below the middle of the specialty; the typical obstetrics & gynecology clinician is at 0.88.

Conditions among them: High blood pressure 61% · Coronary heart disease 19% · Depression 19% · Diabetes 15% · Cancer 15%.

The office billed $13,524, Medicare allowed $5,728 and paid $4,660; for 95 services of 13 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	72	95	75	0.76	$13,524	$4,660
2023	72	129	74	0.71	$22,945	$6,854
2022	79	147	73	0.77	$21,800	$9,529
2021	73	136	73	0.66	$15,275	$7,612
2020	74	130	74	0.69	$15,275	$7,149
2019	109	202	74	0.75	$22,035	$9,949
2018	101	178	73	0.94	$18,840	$8,490
2017	138	213	74	0.84	$28,395	$9,690
2016	153	249	74	0.82	$37,220	$11,838
2015	152	225	73	0.89	$36,865	$12,111
2014	145	292	73	0.84	$41,753	$14,864
2013	93	134	75	0.82	$20,110	$6,946

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

Cervical or vaginal cancer screening; pelvic and clinical breast examination	51	$2,186	$43
Short return visit (20+ min)	18	$1,331	$63
Short return visit	16	$1,090	$47

2022: 4 services

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Original Medicare services billed in 2022

Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory	47	$2,299	$49
Cervical or vaginal cancer screening; pelvic and clinical breast examination	48	$2,091	$44
Return visit (30+ min)	15	$1,663	$111
Short return visit (20+ min)	17	$1,273	$71

2021: 4 services

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Original Medicare services billed in 2021

Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory	52	$2,571	$49
Cervical or vaginal cancer screening; pelvic and clinical breast examination	53	$2,325	$44
Return visit (30+ min)	11	$1,250	$114
Short return visit (20+ min)	13	$974	$70

2020: 3 services

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Original Medicare services billed in 2020

Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory	46	$2,252	$49
Cervical or vaginal cancer screening; pelvic and clinical breast examination	47	$2,086	$44
Short return visit (20+ min)	18	$1,073	$54

2019: 4 services

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Original Medicare services billed in 2019

Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory	62	$3,022	$49
Cervical or vaginal cancer screening; pelvic and clinical breast examination	67	$2,867	$43
Short return visit (20+ min)	37	$2,316	$54
Return visit (30+ min)	13	$990	$71

2018: 3 services

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Original Medicare services billed in 2018

Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory	67	$3,151	$47
Cervical or vaginal cancer screening; pelvic and clinical breast examination	59	$2,329	$39
Short return visit (20+ min)	34	$1,791	$47

2017: 4 services

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Original Medicare services billed in 2017

Cervical or vaginal cancer screening; pelvic and clinical breast examination	78	$3,069	$39
Short return visit (20+ min)	56	$3,046	$45
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory	27	$1,261	$47
Short return visit	15	$608	$32

2016: 3 services

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Original Medicare services billed in 2016

Short return visit (20+ min)	78	$4,739	$48
Cervical or vaginal cancer screening; pelvic and clinical breast examination	87	$3,488	$40
Short return visit	26	$1,040	$32

2015: 4 services

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Original Medicare services billed in 2015

Short return visit (20+ min)	69	$4,609	$52
Cervical or vaginal cancer screening; pelvic and clinical breast examination	79	$3,221	$41
Return visit (30+ min)	19	$1,326	$66
Short return visit	15	$523	$31

2014: 5 services

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Original Medicare services billed in 2014

Cervical or vaginal cancer screening; pelvic and clinical breast examination	99	$4,045	$41
Short return visit (20+ min)	59	$3,984	$55
Return visit (30+ min)	19	$1,853	$81
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory	24	$1,174	$49
Short return visit	15	$432	$27

2013: 4 services

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Original Medicare services billed in 2013

Cervical or vaginal cancer screening; pelvic and clinical breast examination	50	$2,041	$41
Short return visit (20+ min)	22	$1,361	$62
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory	24	$1,200	$50
Short return visit	12	$489	$38

Drugs they prescribed that Part D paid

$22,852

Pharmacies billed $22,852 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 148) in 2024. At or below the middle of the specialty; the typical obstetrics & gynecology clinician is at 0%.

119 generic and 29 brand-name prescriptions · $22,852 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

Estradiol	37	$3,528	$95
Estradiol (Twice Weekly)	11	$1,707	$155

Year by year

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Part D prescribing by year

2024	148	51	0% (0)	20%	$22,852
2023	175	49	0% (0)	None	$26,702
2022	194	43	0% (0)	None	$28,540
2021	176	41	0% (0)	15%	$21,938
2020	181	37	0% (0)	31%	$26,202
2019	215	45	0% (0)	30%	$28,560
2018	250	52	0% (0)	34%	$23,794
2017	225	45	0% (0)	36%	$22,392
2016	238	51	0% (0)	39%	$22,305
2015	253	49	None	52%	$24,663
2014	257	54	0% (0)	60%	$25,300
2013	252	45	0% (0)	66%	$23,279

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

Estradiol (Twice Weekly)	17	$3,173	$187
Estradiol	31	$2,886	$93
Progesterone	11	$172	$16

2022: 4 drugs

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Part D drugs prescribed in 2022

Estradiol (Twice Weekly)	20	$2,994	$150
Progesterone	23	$1,761	$77
Estradiol	17	$920	$54
Lorazepam	12	$65	$5

2021: 5 drugs

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Part D drugs prescribed in 2021

Estradiol (Twice Weekly)	14	$1,991	$142
Progesterone	21	$1,880	$90
Dotti	12	$829	$69
Estradiol	18	$780	$43
Lorazepam	13	$131	$10

2020: 4 drugs

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Part D drugs prescribed in 2020

Progesterone	30	$2,650	$88
Estradiol (Twice Weekly)	20	$2,609	$130
Estradiol	16	$555	$35
Lorazepam	14	$47	$3

2019: 4 drugs

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Part D drugs prescribed in 2019

Premarin	22	$7,789	$354
Estradiol	62	$6,887	$111
Progesterone	33	$3,025	$92
Lorazepam	14	$30	$2

2018: 6 drugs

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Part D drugs prescribed in 2018

Estradiol	84	$7,838	$93
Premarin	24	$6,393	$266
Progesterone	32	$2,532	$79
Acyclovir	11	$561	$51
Norethindrone Acetate	12	$246	$21
Lorazepam	13	$35	$3

2017: 4 drugs

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Part D drugs prescribed in 2017

Premarin	24	$6,423	$268
Estradiol	49	$4,291	$88
Progesterone	36	$2,658	$74
Norethindrone Acetate	18	$422	$23

2016: 6 drugs

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Part D drugs prescribed in 2016

Premarin	27	$5,882	$218
Vagifem	25	$5,761	$230
Estradiol	48	$3,576	$74
Progesterone	27	$1,709	$63
Norethindrone Acetate	19	$632	$33
Medroxyprogesterone Acetate	12	$97	$8

2015: 8 drugs

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Part D drugs prescribed in 2015

Premarin	40	$8,677	$217
Vagifem	30	$5,440	$181
Estradiol	35	$2,838	$81
Vivelle-Dot	13	$1,630	$125
Acyclovir	11	$1,267	$115
Progesterone	29	$983	$34
Medroxyprogesterone Acetate	11	$80	$7
Lorazepam	15	$37	$2

2014: 7 drugs

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Part D drugs prescribed in 2014

Premarin	26	$5,888	$226
Vivelle-Dot	43	$4,946	$115
Vagifem	30	$3,814	$127
Prometrium	12	$1,595	$133
Progesterone	24	$1,474	$61
Estradiol	17	$534	$31
Medroxyprogesterone Acetate	15	$197	$13

2013: 6 drugs

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Part D drugs prescribed in 2013

Premarin	37	$7,262	$196
Vivelle-Dot	46	$4,495	$98
Vagifem	34	$3,489	$103
Progesterone	31	$2,432	$78
Estradiol	33	$409	$12
Medroxyprogesterone Acetate	11	$113	$10

Money from drug and device companies

$68 in 2025

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Industry payments by year

2025	2	3	None	$68
2024	2	2	None	$185
2020	4	7	None	$127
2019	9	29	None	$525

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

Hologic Sales and Service	Thinprep 2000 Processor	$46	2 payments Meals for Thinprep 2000 Processor · 2025-10-02 · $25 Meals for Aptima · 2025-09-15 · $21
Merck Sharp & Dohme	Gardasil 9	$22	1 payment Meals for Gardasil 9 · 2025-11-18 · $22

See all 3 published payments

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Every published payment

Merck Sharp & Dohme	Meals · 2025-11-18	Gardasil 9	$22
Hologic Sales and Service	Meals · 2025-10-02	Thinprep 2000 Processor	$25
Hologic Sales and Service	Meals · 2025-09-15	Aptima	$21

See earlier years (2024, 2020, 2019)

2024: $185

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Payments by company in 2024

ShockWave Medical	Shockwave Ivl System With the Shockwave C2 Coronary Ivl Catheter	$165	1 payment Meals for Shockwave Ivl System With the Shockwave C2 Coronary Ivl Catheter · 2024-01-17 · $165
Astellas Pharma US	Veozah	$21	1 payment Meals for Veozah · 2024-03-29 · $21

2020: $127

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Payments by company in 2020

AbbVie	Orilissa	$57	3 payments Meals for Lo Loestrin Fe · 2020-09-10 · $19 Meals for Orilissa · 2020-03-03 · $24 Meals for Orilissa · 2020-02-11 · $14
Avion Pharmaceuticals	Balcoltra	$32	2 payments Meals for Balcoltra · 2020-07-31 · $13 Meals for Balcoltra · 2020-01-23 · $19
Allergan	Lo Loestrin Fe	$22	1 payment Meals for Lo Loestrin Fe · 2020-07-02 · $22
TherapeuticsMD	Imvexxy	$16	1 payment Meals for Imvexxy · 2020-11-17 · $16

2019: $525

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Payments by company in 2019

AbbVie	Orilissa	$143	9 payments Meals for Orilissa · 2019-11-21 · $21 Meals for Orilissa · 2019-10-09 · $19 Meals for Orilissa · 2019-08-08 · $24 Meals for Orilissa · 2019-05-06 · $11 Meals for Orilissa · 2019-05-06 · $2 Meals for Orilissa · 2019-04-24 · $3 Meals for Orilissa · 2019-04-24 · $19 Meals for Orilissa · 2019-04-04 · $19 Meals for Orilissa · 2019-01-31 · $24
TherapeuticsMD	Imvexxy	$116	7 payments Meals for Bijuva · 2019-12-04 · $24 Meals for Bijuva · 2019-11-12 · $5 Meals for Imvexxy · 2019-10-01 · $23 Meals for Imvexxy · 2019-09-19 · $8 Meals for Imvexxy · 2019-07-23 · $18 Meals for Imvexxy · 2019-04-23 · $16 Meals for Imvexxy · 2019-02-12 · $21
Avion Pharmaceuticals	Prenate Mini	$95	5 payments Meals for Prenate Mini · 2019-10-08 · $20 Meals for Prenate Mini · 2019-06-22 · $19 Meals for Prenate Mini · 2019-06-05 · $18 Meals for Prenate Mini · 2019-05-01 · $19 Meals for Balcoltra · 2019-02-05 · $19
Hologic	Aptima Combo 2	$51	2 payments Meals for Novasure · 2019-03-25 · $23 Meals for Aptima Combo 2 · 2019-01-17 · $28
Coloplast	Altis	$38	1 payment Education for Altis · 2019-05-07 · $38
Bayer HealthCare Pharmaceuticals	Kyleena	$27	2 payments Meals for Kyleena · 2019-06-17 · $11 Meals for Kyleena · 2019-05-09 · $16
Sanofi Pasteur	Fluzone High-Dose	$21	1 payment Meals for Fluzone High-Dose · 2019-10-30 · $21
Vertical Pharmaceuticals	Relexxii	$18	1 payment Meals for Relexxii · 2019-11-27 · $18
Merck Sharp & Dohme	Nuvaring	$17	1 payment Meals for Nuvaring · 2019-04-25 · $17

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score: 76.3 / 100; Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI: 1407956527
Licence: CA G50676California G50676: Current · expires 2028-08-31
Trained: University of Southern California Keck School of Medicine, 1977 · 49 years ago
Group: Pih Health Physicians
Video visits: Lists video visits
Gender: Female

More record details

Sole proprietor: Yes
Taxonomy: Federal specialty code 207V00000X (207V00000X)
Mailing address: 637 Lucas Ave, Suite 200, Los Angeles, CA, 90017
NPI first listed: 2006-09-25
NPI last updated: 2007-07-08

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