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Margaret S Lo

Family Practice · Los Altos

NPI 1174653992

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
1
1 carrier
Offices
2

Offices

2 locations · Sutter Bay Medical Foundation · 3,783 clinicians in this group

Looking this up.

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 Margaret S Lo’s office to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

Plans whose provider directory lists this clinician
Alignment Health Sutter Advantage +More (HMO)Alignment Health PlanListedOct 3, 2026

California Medical Board record

Licence A95854 · Current

Licensed to practise in California · since 2006 · expires 2028-06-30 · University of California, Davis School of Medicine.

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

Original Medicare doctor bills

$22,665

Medicare paid this office $22,665 for 111 people.

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

Largest Original Medicare bills
Short return visit (20+ min)81$7,495$74
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit36$5,664$157
Return visit (30+ min)25$4,131$115

Who their Medicare patients are

111 Original Medicare patients in 2024. Average age 75 · Women 70% · Also on Medicaid 14% · Health risk score 0.85. At or below the middle of the specialty; the typical family practice clinician is at 1.13.

Conditions among them: High blood pressure 57% · Coronary heart disease 28% · Diabetes 19% · Cancer 16% · Atrial fibrillation 14% · Depression 14%.

The office billed $55,491, Medicare allowed $28,041 and paid $22,665; for 229 services of 18 kinds; $3,196 of it was for drugs given in the office and $19,468 for care.

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
2024111229750.85$55,491$22,665
2023162270750.71$61,827$25,767
2022125235750.74$50,176$23,554
202176170750.70$35,245$15,934
202097190740.84$49,038$19,592
201973208730.74$43,436$16,075
201878200730.68$33,432$13,543
201778203720.63$41,176$13,639
201662168740.72$32,749$10,344
201596252730.72$42,088$16,611
201475183740.65$34,428$10,129
201360150740.75$24,140$8,042

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

Original Medicare services billed in 2023
Short return visit (20+ min)113$10,744$84
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit34$5,424$160
Return visit (30+ min)28$4,039$112

2022: 3 services

Original Medicare services billed in 2022
Short return visit (20+ min)85$8,268$81
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit43$6,795$158
Return visit (30+ min)21$3,658$111

2021: 4 services

Original Medicare services billed in 2021
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit33$4,806$146
Return visit (30+ min)26$4,513$110
Short return visit (20+ min)26$2,074$65
Administration of influenza virus vaccine12$262$22

2020: 6 services

Original Medicare services billed in 2020
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit26$3,675$141
Short return visit (20+ min)45$3,022$64
Return visit (30+ min)26$1,696$57
Influenza vaccine split virus, preservative free15$908$61
Administration of influenza virus vaccine17$355$21
Administration of pneumococcal vaccine11$228$21

2019: 3 services

Original Medicare services billed in 2019
Return visit (30+ min)34$5,714$91
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit29$4,054$140
Short return visit (20+ min)39$2,613$56

2018: 4 services

Original Medicare services billed in 2018
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit30$3,940$131
Return visit (30+ min)37$3,466$79
Short return visit (20+ min)28$1,668$52
Administration of influenza virus vaccine16$412$26

2017: 3 services

Original Medicare services billed in 2017
Return visit (30+ min)50$6,096$84
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit17$2,166$127
Short return visit (20+ min)27$1,402$45

2016: 4 services

Original Medicare services billed in 2016
Return visit (30+ min)36$3,809$76
Short return visit (20+ min)30$1,998$53
Influenza vaccine split virus, preservative free11$400$36
Administration of influenza virus vaccine13$395$30

2015: 6 services

Original Medicare services billed in 2015
Return visit (30+ min)33$3,594$88
Pneumococcal vaccine, 13-valent21$3,168$151
Short return visit (20+ min)45$3,144$60
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit13$1,710$132
Administration of pneumococcal vaccine24$729$30
Administration of influenza virus vaccine13$406$31

2014: 2 services

Original Medicare services billed in 2014
Return visit (30+ min)42$4,416$79
Short return visit (20+ min)38$2,772$52

2013: 2 services

Original Medicare services billed in 2013
Return visit (30+ min)27$3,165$90
Short return visit (20+ min)26$1,737$60

Drugs they prescribed that Part D paid

$22,607

Pharmacies billed $22,607 in 2024.

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

597 generic and fewer than 11 brand-name prescriptions · $22,607 in drug cost · 14 antibiotic prescriptions to 13 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
Paxlovid11$1,429$130
Atorvastatin57$342$6
Metoprolol20$342$17
Alendronate21$291$14
Duloxetine14$233$17
See all 16 drugs
Every Part D drug this clinician prescribed
Paxlovid11$1,429$130
Atorvastatin57$342$6
Metoprolol20$342$17
Alendronate21$291$14
Duloxetine14$233$17
Amlodipine Besylate46$213$5
Levothyroxine19$201$11
Rosuvastatin11$191$17
Losartan26$184$7
Lisinopril25$148$6
Trazodone12$107$9
Hydrochlorothiazide31$102$3
Metformin24$80$3
Lorazepam12$65$5
Metformin Hcl Er17$62$4
Lovastatin11$37$3

Year by year

Part D prescribing by year
202464497NoneNone$22,607
2023623119None4%$24,640
202256481None4%$25,551
202151862None5%$21,670
202046865None7%$20,513
201942464None9%$25,185
201840855None13%$24,329
201736653None13%$24,930
2016329460% (0)16%$20,902
201535848None14%$13,595
201433547None24%$15,999
201320234None19%$7,817

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

See the drugs prescribed each year

2023: 17 drugs

Part D drugs prescribed in 2023
Rosuvastatin22$1,349$61
Amlodipine Besylate43$686$16
Duloxetine17$675$40
Losartan27$666$25
Atorvastatin50$664$13
Levothyroxine14$411$29
Metoprolol21$404$19
Paxlovid (Eua)39$390$10
Eletriptan Hbr11$372$34
Alendronate18$222$12
Lovastatin13$208$16
Hydrochlorothiazide26$206$8
Zolpidem18$177$10
Metformin18$116$6
Lisinopril12$98$8
Trazodone15$80$5
Sertraline13$54$4

2022: 14 drugs

Part D drugs prescribed in 2022
Duloxetine15$1,076$72
Rosuvastatin14$856$61
Atorvastatin51$609$12
Losartan24$411$17
Metoprolol19$364$19
Levothyroxine12$331$28
Hydrochlorothiazide27$330$12
Zolpidem28$268$10
Paxlovid (Eua)21$213$10
Alendronate13$202$16
Amlodipine Besylate34$182$5
Atenolol11$176$16
Lisinopril18$110$6
Metformin14$53$4

2021: 14 drugs

Part D drugs prescribed in 2021
Atorvastatin59$713$12
Duloxetine12$552$46
Levothyroxine20$543$27
Metoprolol22$465$21
Amlodipine Besylate35$437$12
Diclofenac11$372$34
Alendronate16$300$19
Terazosin12$257$21
Lisinopril26$250$10
Metformin18$203$11
Losartan23$202$9
Zolpidem21$201$10
Atenolol13$149$11
Hydrochlorothiazide20$77$4

2020: 12 drugs

Part D drugs prescribed in 2020
Atorvastatin41$529$13
Metoprolol12$529$44
Levothyroxine18$482$27
Lisinopril32$349$11
Duloxetine19$312$16
Diclofenac12$276$23
Amlodipine Besylate43$257$6
Metformin16$199$12
Terazosin12$162$14
Zolpidem15$131$9
Losartan13$109$8
Hydrochlorothiazide13$47$4

2019: 10 drugs

Part D drugs prescribed in 2019
Metoprolol17$631$37
Atorvastatin37$617$17
Levothyroxine22$588$27
Lisinopril27$330$12
Gabapentin11$276$25
Amlodipine Besylate30$252$8
Metformin12$166$14
Sumatriptan12$104$9
Azithromycin13$89$7
Hydrochlorothiazide12$51$4

2018: 9 drugs

Part D drugs prescribed in 2018
Levothyroxine23$688$30
Metoprolol15$630$42
Atorvastatin38$612$16
Lisinopril33$264$8
Amlodipine Besylate29$152$5
Metformin13$146$11
Losartan14$118$8
Sumatriptan13$101$8
Hydrochlorothiazide14$52$4

2017: 8 drugs

Part D drugs prescribed in 2017
Atorvastatin39$576$15
Levothyroxine14$486$35
Gabapentin11$481$44
Amlodipine Besylate32$263$8
Metoprolol12$236$20
Sumatriptan13$122$9
Losartan13$121$9
Lisinopril12$58$5

2016: 8 drugs

Part D drugs prescribed in 2016
Montelukast12$234$20
Amlodipine Besylate25$213$9
Atorvastatin14$208$15
Benazepril16$192$12
Lovastatin14$134$10
Sumatriptan12$106$9
Losartan14$103$7
Simvastatin11$80$7

2015: 11 drugs

Part D drugs prescribed in 2015
Zolpidem12$327$27
Atorvastatin13$306$24
Benazepril22$254$12
Montelukast13$210$16
Sumatriptan12$207$17
Amlodipine Besylate24$153$6
Simvastatin19$150$8
Alendronate11$137$12
Terazosin11$132$12
Trihexyphenidyl13$108$8
Losartan11$102$9

2014: 7 drugs

Part D drugs prescribed in 2014
Atorvastatin16$462$29
Pravastatin11$339$31
Alendronate20$306$15
Amlodipine Besylate25$228$9
Simvastatin19$225$12
Losartan15$166$11
Zolpidem14$129$9

2013: 4 drugs

Part D drugs prescribed in 2013
Alendronate27$378$14
Simvastatin21$224$11
Terazosin11$163$15
Lisinopril13$82$6

Professional record

NPI
1174653992
Licence
CA A95854California A95854: Current · expires 2028-06-30
Trained
University of California, Davis School of Medicine, 2004
Video visits
Lists video visits
Gender
Female
More record details
Sole proprietor
No
Taxonomy
Family medicine (207Q00000X); Federal specialty code 207QS0010X (207QS0010X)
Mailing address
325 Distel Cir, Los Altos, CA, 94022
NPI first listed
2007-03-07
NPI last updated
2020-05-27
NPI record certified
2020-05-27

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