Erik Richard Ensrud, MD

Offices

1 location · Stanford Health Care · 3,152 clinicians in this group

Looking this up.

Plans that list them

13 plans · 2 carriers

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Ensrud’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

13 of 13 plans

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Plans whose provider directory lists this clinician

Alignment Health BreathEasy (HMO C-SNP)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Clarity (HMO C-SNP)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Harmony (HMO)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Heart & Diabetes (HMO C-SNP)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Heart & Diabetes CalPlus (HMO C-SNP)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Heart & Diabetes Care (HMO C-SNP)	Alignment Health Plan	Listed	Sep 28, 2026
Alignment Health Heart & Diabetes Choice (HMO C-SNP)	Alignment Health Plan	Listed	Sep 28, 2026
Alignment Health Honor+ Plan (HMO)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health My Choice CalCare (HMO)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health Silicon (HMO C-SNP)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health smartHMO (HMO)	Alignment Health Plan	Listed	Oct 3, 2026
Alignment Health the ONE (HMO)	Alignment Health Plan	Listed	Oct 3, 2026
DualConnect (HMO D-SNP)	Santa Clara Family Health Plan	Listed	Sep 1, 2026

Original Medicare doctor bills

$32,408

Medicare paid this office $32,408 for 189 people.

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

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Largest Original Medicare bills

Long return visit (40+ min)	45	$6,944	$91
Muscle electrical test	71	$3,411	$31
Nerve test	27	$3,315	$123
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes	15	$2,874	$59
Return visit (30+ min)	41	$2,844	$65

See all 12 services

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Every Original Medicare service billed

Long return visit (40+ min)	45	$6,944	$91
Muscle electrical test	71	$3,411	$31
Nerve test	27	$3,315	$123
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes	15	$2,874	$59
Return visit (30+ min)	41	$2,844	$65
New patient visit (60+ min)	20	$2,391	$120
Nerve test	29	$2,249	$78
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	15	$1,459	$97
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	73	$1,101	$12
Nerve test	16	$1,076	$67
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or	24	$1,067	$21
Muscle electrical test	18	$254	$11

Who their Medicare patients are

189 Original Medicare patients in 2024. Average age 67 · Under 65 29% · 85 and older 6% · Women 42% · Also on Medicaid 23% · Health risk score 1.44. At or below the middle of the specialty; the typical neurology clinician is at 1.61.

Conditions among them: High blood pressure 65% · Depression 34% · Diabetes 26% · Coronary heart disease 17% · Stroke 16% · Heart failure 15% · Chronic kidney disease 15% · Atrial fibrillation 14% · Cancer 12% · COPD 12% · Dementia 11%.

The office billed $120,940, Medicare allowed $44,287 and paid $32,408; for 602 services of 25 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	189	602	67	1.44	$120,940	$32,408
2023	183	380	67	1.59	$89,001	$25,345
2022	206	518	67	1.59	$116,281	$34,158
2021	70	233	70	1.45	$51,739	$19,370
2020	115	277	68	1.08	$61,084	$18,557
2019	171	408	69	1.25	$89,142	$26,587
2018	171	460	68	1.26	$77,204	$31,526
2017	150	284	68	1.24	$69,367	$22,781
2016	154	613	75	1.48	$148,567	$45,268
2015	34	119	71	2.13	$46,233	$10,334
2014	23	34	67	1.03	$11,235	$2,543
2013	60	221	71	1.35	$83,448	$19,349

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: 10 services

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Original Medicare services billed in 2023

Long return visit (40+ min)	45	$5,372	$94
Nerve test	35	$3,387	$97
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes	15	$2,200	$56
Return visit (30+ min)	31	$2,030	$65
Nerve test	15	$2,002	$133
Muscle electrical test	42	$1,664	$33
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	14	$1,369	$98
New patient visit (45+ min)	12	$1,098	$91
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or	18	$676	$22
Muscle electrical test	24	$375	$13

2022: 10 services

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Original Medicare services billed in 2022

Long return visit (40+ min)	46	$6,806	$103
Muscle electrical test	84	$4,334	$34
Nerve test	27	$3,830	$142
Return visit (30+ min)	42	$3,225	$72
Nerve test	33	$3,043	$92
New patient visit (60+ min)	11	$1,529	$139
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or	30	$1,301	$24
Nerve test	16	$1,293	$81
New patient visit (45+ min)	11	$1,024	$93
Short return visit (20+ min)	13	$620	$48

2021: 6 services

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Original Medicare services billed in 2021

Long return visit (40+ min)	29	$6,505	$112
New patient visit (60+ min)	36	$4,972	$138
Nerve test	11	$1,605	$146
Muscle electrical test	25	$1,488	$35
Short return visit (20+ min)	11	$670	$52
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or	15	$588	$25

2020: 9 services

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Original Medicare services billed in 2020

Muscle electrical test	63	$3,606	$36
New patient visit (60+ min)	23	$2,943	$128
Long return visit (40+ min)	26	$2,408	$80
Nerve test	13	$1,935	$149
Nerve test	15	$1,477	$98
Return visit (30+ min)	20	$1,416	$62
Nerve test	16	$1,233	$77
Nerve test	17	$1,099	$65
New patient visit (45+ min)	11	$1,074	$98

2019: 10 services

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Original Medicare services billed in 2019

Muscle electrical test	49	$2,797	$37
Nerve test	22	$2,116	$88
New patient visit (45+ min)	21	$2,099	$100
New patient visit (60+ min)	15	$2,032	$135
Return visit (30+ min)	27	$2,007	$59
New patient visit (45+ min)	23	$1,953	$85
Muscle electrical test	36	$1,806	$35
Long return visit (40+ min)	16	$1,614	$85
Return visit (30+ min)	19	$878	$44
Nerve test	13	$539	$41

2018: 9 services

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Original Medicare services billed in 2018

New patient visit (60+ min)	45	$5,817	$129
Long return visit (40+ min)	32	$3,914	$85
New patient visit (45+ min)	38	$3,854	$101
Muscle electrical test	62	$3,247	$36
Return visit (30+ min)	34	$2,449	$58
Nerve test	23	$1,518	$63
Nerve test	17	$1,497	$83
Nerve test	12	$1,319	$110
Short return visit (20+ min)	20	$964	$40

2017: 8 services

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Original Medicare services billed in 2017

Muscle electrical test	41	$3,119	$54
Nerve test	32	$3,116	$97
Nerve test	13	$1,766	$136
New patient visit (45+ min)	17	$1,740	$102
New patient visit (60+ min)	11	$1,421	$129
Long return visit (40+ min)	11	$1,409	$94
Nerve test	14	$1,187	$85
Return visit (30+ min)	11	$851	$71

2016: 9 services

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Original Medicare services billed in 2016

Subsequent hospital care with moderate levelof medical decision making at least 35 minutes	82	$16,096	$56
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes	56	$9,904	$81
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	47	$5,177	$106
Initial hospital care with moderate level of medical decision making at least 75 minutes	16	$2,507	$157
Hospital discharge day management, 30 minutes or less	36	$2,029	$56
Nerve test	11	$1,259	$114
Long return visit (40+ min)	11	$1,241	$113
Muscle electrical test	13	$1,233	$73
Hospital discharge day management, more than 30 minutes	13	$1,085	$83

2015: 3 services

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Original Medicare services billed in 2015

Subsequent hospital care with moderate levelof medical decision making at least 50 minutes	20	$5,387	$86
Initial hospital care with moderate level of medical decision making at least 75 minutes	13	$2,163	$166
Hospital discharge day management, 30 minutes or less	11	$666	$61

2014: 2 services

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Original Medicare services billed in 2014

Long return visit (40+ min)	14	$1,546	$86
Return visit (30+ min)	11	$775	$65

2013: 5 services

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Original Medicare services billed in 2013

Subsequent hospital care with moderate levelof medical decision making at least 50 minutes	31	$10,582	$83
Initial hospital care with moderate level of medical decision making at least 75 minutes	19	$3,234	$162
Long return visit (40+ min)	16	$1,772	$84
Hospital discharge day management, more than 30 minutes	19	$1,643	$86
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes	11	$631	$57

Medicaid work

$2,301 in 2024

Medicaid paid $2,301 for 34 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.

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Largest Medicaid services in 2024

Hospital outpatient clinic visit for assessment and management of a patient	34	$2,301

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Medicaid work by year

2024	34	1	20	$2,301
2023	72	1	19	$4,458
2022	62	2	16	$2,886
2020	119	1	19	$5,655
2019	186	2	20	$5,451
2018	79	1	21	$2,408

See the largest Medicaid services in earlier years

2023

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Largest Medicaid services in 2023

Hospital outpatient clinic visit for assessment and management of a patient	72	$4,458

2022

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Largest Medicaid services in 2022

Muscle electrical test	33	$1,539
Hospital outpatient clinic visit for assessment and management of a patient	29	$1,347

2020

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Largest Medicaid services in 2020

Muscle electrical test	119	$5,655

2019

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Largest Medicaid services in 2019

Muscle electrical test	170	$4,613
Hospital outpatient clinic visit for assessment and management of a patient	16	$838

2018

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Largest Medicaid services in 2018

Muscle electrical test	79	$2,408

Drugs they prescribed that Part D paid

$2,341,920

Pharmacies billed $2,341,920 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 366) in 2024. At or below the middle of the specialty; the typical neurology clinician is at 0%.

190 generic and 176 brand-name prescriptions · $2,341,920 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

Vyvgart	None	13	$931,516	$71,655
Radicava Ors	None	49	$719,129	$14,676
Gammagard Liquid	Immune globulin	45	$194,456	$4,321
Gammaked	Immune globulin	11	$177,461	$16,133
Privigen	Immune globulin	16	$136,447	$8,528

See all 13 drugs

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Every Part D drug this clinician prescribed

Vyvgart	None	13	$931,516	$71,655
Radicava Ors	None	49	$719,129	$14,676
Gammagard Liquid	Immune globulin	45	$194,456	$4,321
Gammaked	Immune globulin	11	$177,461	$16,133
Privigen	Immune globulin	16	$136,447	$8,528
Riluzole	None	30	$7,708	$257
Pyridostigmine	None	32	$3,637	$114
Mexiletine	None	11	$245	$22
Sodium Chloride	None	25	$199	$8
Nortriptyline	None	22	$198	$9
Prednisone	None	24	$172	$7
Gabapentin	None	11	$107	$10
Famotidine	None	13	$16	$1

Year by year

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Part D prescribing by year

2024	366	45	0% (0)	48%	$2,341,920
2023	412	43	0% (0)	54%	$2,894,135
2022	297	40	0% (0)	47%	$1,788,751
2021	60	14	0% (0)	None	$51,590
2019	22	None	0% (0)	0%	$188
2018	27	None	0% (0)	0%	$225
2017	18	12	None	None	$544
2016	62	15	None	None	$2,998

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

See the drugs prescribed each year

2023: 12 drugs

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Part D drugs prescribed in 2023

Vyvgart	None	20	$1,426,950	$71,347
Radicava Ors	None	28	$372,933	$13,319
Gammagard Liquid	Immune globulin	72	$356,881	$4,957
Gammaked	Immune globulin	15	$320,278	$21,352
Privigen	Immune globulin	26	$206,695	$7,950
Pyridostigmine	None	29	$2,537	$87
Riluzole	None	13	$2,371	$182
Sodium Chloride	None	37	$460	$12
Prednisone	None	30	$319	$11
Baclofen	None	15	$262	$17
Propranolol	None	12	$235	$20
Ondansetron	None	15	$134	$9

2022: 11 drugs

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Part D drugs prescribed in 2022

Vyvgart	None	11	$751,222	$68,293
Gammagard Liquid	Immune globulin	37	$359,611	$9,719
Gammaked	Immune globulin	21	$289,429	$13,782
Radicava Ors	None	18	$252,350	$14,019
Privigen	Immune globulin	12	$74,086	$6,174
Pyridostigmine	None	37	$2,890	$78
Riluzole	None	14	$1,586	$113
Gabapentin	None	12	$340	$28
Sodium Chloride	None	26	$312	$12
Prednisone	None	23	$258	$11
Ondansetron	None	16	$125	$8

2021: 1 drug

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Part D drugs prescribed in 2021

Gabapentin	12	$208	$17

2019: 1 drug

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Part D drugs prescribed in 2019

Gabapentin	20	$138	$7

2018: 1 drug

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Part D drugs prescribed in 2018

Gabapentin	23	$188	$8

Money from drug and device companies

$2,025 in 2023

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Industry payments by year

2023	1	2	$2,013	$2,025
2022	1	7	$2,500	$2,737
2021	1	1	None	$19

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

Argenx US	Vyvgart	$2,025	2 payments Meals · 2023-03-19 · $13 Consulting for Vyvgart · 2023-02-09 · $2,013

See all 2 published payments

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Every published payment

Argenx US	Meals · 2023-03-19	None	$13
Argenx US	Consulting · 2023-02-09	Vyvgart	$2,013

See earlier years (2022, 2021)

2022: $2,737

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Payments by company in 2022

Argenx US	Vyvgart	$2,737	7 payments Meals for Vyvgart · 2022-12-21 · $41 Paid to speak or teach for Vyvgart · 2022-12-21 · $2,000 Travel for Vyvgart · 2022-12-21 · $3 Meals for Vyvgart · 2022-12-15 · $100 Meals for Vyvgart · 2022-09-23 · $56 Meals for Vyvgart · 2022-08-11 · $38 Paid to speak or teach for Vyvgart · 2022-06-15 · $500

2021: $19

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Payments by company in 2021

Biohaven Pharmaceuticals	Nurtec Odt	$19	1 payment Meals for Nurtec Odt · 2021-08-26 · $19

Research money

Money a company paid to run a study. Where it went to their institution, the clinician is named as an investigator and did not receive it; the amount covers the whole study, often across many sites.

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Research payments by company and study

Alexion Pharmaceuticals, Inc. · Long Term, Observational, Registry of Patients With Generalized Myasthenia Gravis Who Have Received Treatment With Complement C5 Inhibition Therapies · 2023	Their institution	$7,543
Alexion Pharmaceuticals, Inc. · Long Term, Observational, Registry of Patients With Generalized Myasthenia Gravis Who Have Received Treatment With Complement C5 Inhibition Therapies · 2024	Their institution	$4,938
Alexion Pharmaceuticals, Inc. · Long Term, Observational, Registry of Patients With Generalized Myasthenia Gravis Who Have Received Treatment With Complement C5 Inhibition Therapies · 2025	Their institution	$4,194

Professional record

NPI: 1982658738
Licence: MO 2021049178, OR MD181780
Group: Stanford Health Care
Gender: Male

More record details

Sole proprietor: No
Medicaid ID: MO 200094637, TX 172255501
Taxonomy: Neurology (2084N0400X); Federal specialty code 204R00000X (204R00000X); Federal specialty code 208100000X (208100000X); Federal specialty code 2081N0008X (2081N0008X); Federal specialty code 2084N0008X (2084N0008X)
Mailing address: 300 Pasteur Dr, Stanford, CA, 94305
NPI first listed: 2006-05-19
NPI last updated: 2026-03-17
NPI record certified: 2026-03-17

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

Extra NPI addresses: 1020 Hitt St, Columbia, MO, 65212

This office lists an electronic records connection.