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Dr. Melissa J. Williams, MD

Accepting New Patients

(747 Ratings)

Specializes in: Medical Oncology, Adult Oncology and Adult Hematology

University of Wisconsin School of Medicine and Public Health

2020 Sutter Place Suite 106
Davis, CA 95616

(530) 747-5080

Dr. Melissa J. Williams, MD is a medical oncologist in Davis, CA specializing in medical oncology, adult oncology and adult hematology. She graduated from University of Wisconsin School of Medicine and Public Health. Dr. Melissa J. Williams, MD is affiliated with Sutter Health.

Office Locations

Sutter Health

2020 Sutter Place Suite 106
Davis, CA 95616

(530) 747-5080

(530) 747-5058

open_in_new

2800 L Street Suite 300
Sacramento, CA 95816

(916) 453-3300

(916) 454-6822

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Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	576

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	576

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	42
Female	168

**Ethnicity**
Non-Hispanic White	175
Black	0
Hispanic	18
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	102
From 75 to 84	62
85 and over	25
Less than 65	21

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2013

Hypertension	46
High Cholesterol	35
Stroke	0
Ischemic Heart Disease	19
Depression	21
Chronic Kidney Disease	19
Asthma	5
Osteoperosis	10
Atrial Fibrilation	8
Heart Failure	8
Chronic Obstructive Pulmonary Disease	10
Diabetes	18
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	593

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	37
Female	195

**Ethnicity**
Non-Hispanic White	194
Black	0
Hispanic	19
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	122
From 75 to 84	63
85 and over	27
Less than 65	20

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2014

Hypertension	45
High Cholesterol	37
Stroke	0
Ischemic Heart Disease	17
Depression	21
Chronic Kidney Disease	17
Asthma	10
Osteoperosis	10
Atrial Fibrilation	6
Heart Failure	9
Chronic Obstructive Pulmonary Disease	9
Diabetes	20
Dementia	5
Cancer	75

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	849

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	82
Female	534

**Ethnicity**
Non-Hispanic White	498
Black	22
Hispanic	64
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	326
From 75 to 84	168
85 and over	54
Less than 65	68

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2015

Hypertension	45
High Cholesterol	35
Stroke	4
Ischemic Heart Disease	17
Depression	20
Chronic Kidney Disease	18
Asthma	11
Osteoperosis	13
Atrial Fibrilation	5
Heart Failure	11
Chronic Obstructive Pulmonary Disease	10
Diabetes	22
Dementia	5
Cancer	74

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	842

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	39
Female	300

**Ethnicity**
Non-Hispanic White	272
Black	0
Hispanic	35
Asian	14
Other	0
Native American	0

**Age**
From 65 to 74	175
From 75 to 84	98
85 and over	35
Less than 65	31

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2016

Hypertension	46
High Cholesterol	34
Stroke	0
Ischemic Heart Disease	19
Depression	20
Chronic Kidney Disease	20
Asthma	11
Osteoperosis	14
Atrial Fibrilation	7
Heart Failure	10
Chronic Obstructive Pulmonary Disease	9
Diabetes	22
Dementia	4
Cancer	75

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	954

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	43
Female	297

**Ethnicity**
Non-Hispanic White	273
Black	0
Hispanic	34
Asian	16
Other	0
Native American	0

**Age**
From 65 to 74	174
From 75 to 84	110
85 and over	30
Less than 65	26

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2017

Hypertension	49
High Cholesterol	31
Stroke	3
Ischemic Heart Disease	20
Depression	25
Chronic Kidney Disease	21
Asthma	7
Osteoperosis	14
Atrial Fibrilation	7
Heart Failure	10
Chronic Obstructive Pulmonary Disease	9
Diabetes	21
Dementia	5
Cancer	75

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	889

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	39
Female	335

**Ethnicity**
Non-Hispanic White	295
Black	0
Hispanic	38
Asian	21
Other	0
Native American	0

**Age**
From 65 to 74	184
From 75 to 84	120
85 and over	39
Less than 65	31

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2018

Hypertension	55
High Cholesterol	43
Stroke	4
Ischemic Heart Disease	20
Depression	23
Chronic Kidney Disease	24
Asthma	6
Osteoperosis	11
Atrial Fibrilation	7
Heart Failure	11
Chronic Obstructive Pulmonary Disease	9
Diabetes	22
Dementia	5
Cancer	75

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	948

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	39
Female	371

**Ethnicity**
Non-Hispanic White	324
Black	0
Hispanic	42
Asian	23
Other	0
Native American	0

**Age**
From 65 to 74	218
From 75 to 84	121
85 and over	42
Less than 65	29

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2019

Hypertension	50
High Cholesterol	42
Stroke	0
Ischemic Heart Disease	21
Depression	21
Chronic Kidney Disease	26
Asthma	6
Osteoperosis	12
Atrial Fibrilation	7
Heart Failure	12
Chronic Obstructive Pulmonary Disease	9
Diabetes	21
Dementia	5
Cancer	75

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	769

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	31
Female	329

**Ethnicity**
Non-Hispanic White	284
Black	0
Hispanic	39
Asian	19
Other	0
Native American	0

**Age**
From 65 to 74	185
From 75 to 84	115
85 and over	34
Less than 65	26

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2020

Hypertension	47
High Cholesterol	39
Stroke	0
Ischemic Heart Disease	19
Depression	19
Chronic Kidney Disease	27
Asthma	6
Osteoperosis	14
Atrial Fibrilation	5
Heart Failure	13
Chronic Obstructive Pulmonary Disease	8
Diabetes	21
Dementia	5
Cancer	75

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	745

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	29
Female	337

**Ethnicity**
Non-Hispanic White	288
Black	0
Hispanic	34
Asian	24
Other	0
Native American	0

**Age**
From 65 to 74	187
From 75 to 84	117
85 and over	39
Less than 65	23

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2021

Hypertension	46
High Cholesterol	44
Stroke	3
Ischemic Heart Disease	19
Depression	23
Chronic Kidney Disease	25
Asthma	5
Osteoperosis	18
Atrial Fibrilation	6
Heart Failure	10
Chronic Obstructive Pulmonary Disease	7
Diabetes	23
Dementia	4
Cancer	75

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	782

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	29
Female	321

**Ethnicity**
Non-Hispanic White	275
Black	0
Hispanic	33
Asian	23
Other	0
Native American	0

**Age**
From 65 to 74	161
From 75 to 84	127
85 and over	39
Less than 65	23

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2022

Hypertension	54
High Cholesterol	56
Stroke	5
Ischemic Heart Disease	14
Depression	21
Chronic Kidney Disease	20
Asthma	9
Osteoperosis	29
Atrial Fibrilation	10
Heart Failure	11
Chronic Obstructive Pulmonary Disease	9
Diabetes	23
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	841

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	27
Female	339

**Ethnicity**
Non-Hispanic White	293
Black	0
Hispanic	32
Asian	25
Other	0
Native American	0

**Age**
From 65 to 74	174
From 75 to 84	129
85 and over	43
Less than 65	20

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2023

Hypertension	53
High Cholesterol	58
Stroke	5
Ischemic Heart Disease	13
Depression	20
Chronic Kidney Disease	20
Asthma	6
Osteoperosis	28
Atrial Fibrilation	10
Heart Failure	9
Chronic Obstructive Pulmonary Disease	11
Diabetes	22
Dementia	3
Cancer	75

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	961

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	24
Female	345

**Ethnicity**
Non-Hispanic White	293
Black	0
Hispanic	33
Asian	27
Other	0
Native American	0

**Age**
From 65 to 74	169
From 75 to 84	138
85 and over	42
Less than 65	20

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2024

Hypertension	54
High Cholesterol	59
Stroke	3
Ischemic Heart Disease	14
Depression	20
Chronic Kidney Disease	22
Asthma	9
Osteoperosis	30
Atrial Fibrilation	10
Heart Failure	8
Chronic Obstructive Pulmonary Disease	10
Diabetes	22
Dementia	4
Cancer	75

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. Melissa J. Williams, MD for Medicare patients.

doctor visit	794

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. Melissa J. Williams, MD.

**Gender**
Male	35
Female	297

**Ethnicity**
Black / African American	1
Asian / Pacific Islander	14
Non-Hispanic White	266
Native American / Alaskan Native	0
Hispanic	32
Other	0

**Age**
75 to 84	105
85 and over	34
Less than 65	26
65 to 74	167

Average of Total of Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. Melissa J. Williams, MD treated were cancer, hypertension, high cholesterol and chronic kidney disease.

Hypertension	45
High Cholesterol	39
Stroke	2
Ischemic Heart Disease	16
Depression	19
Chronic Kidney Disease	19
Asthma	7
Osteoporosis	15
Heart Failure	9
Chronic Obstructive Pulmonary Disease	8
Diabetes	19
Atrial Fibrillation	6
Dementia	3
Cancer	69

Education & Training

Dr. Melissa J. Williams, MD graduated from University of Wisconsin School of Medicine and Public Health. She completed residency at Thomas Jefferson University Affiliated Hospitals. She is certified by the Medical Oncology - Board Certified and has a state license in Pennsylvania.

Medical School: University of Wisconsin School of Medicine and Public Health

Residency: Thomas Jefferson University Affiliated Hospitals

Board Certification: Medical Oncology - Board Certified

Licensed In: Pennsylvania

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Melissa J. Williams, MD appears to accept the following insurance providers: Private Healthcare Systems (PHCS), WellCare, Medicare Advantage, MultiPlan, Magellan Health Services, Anthem Blue Cross of California, Blue Shield of California, United Healthcare, Cigna, Alliance PPO, HealthSmart, Aetna: Aetna Signature Administrators (ASA), Aetna: Quality Point of Service (QPOS), Aetna: Aetna Student Health Program, Aetna: National Advantage Plan (NAP), Health Net - Currently in 2027 Contract Negotiations: SELECT three-tier POS and SELECT two-tier POS, Large and Small Group, Health Net - Currently in 2027 Contract Negotiations: Health Net HMO: Large Group (101+ employees) & Small Group (2-100 employees), Health Net - Currently in 2027 Contract Negotiations: ELECT Open Access POS, Large and Small Group, Health Net - Currently in 2027 Contract Negotiations: ELECT POS, Large and Small Group, TRICARE: Prime Remote, Aetna: Stanford University Faculty & Staff (SUFS) - Copay Plan - Open Access Aetna Select, Health Net - Currently in 2027 Contract Negotiations: Salud HMO Plus Large/Custom Group, TRICARE: Select (formerly TRICARE Standard and TRICARE Extra), TRICARE: Retired Reserve, Aetna: Aetna Choice POS II, Aetna: Traditional Choice, Aetna: HMO Deductible Plans, Aetna: Managed Choice POS, Aetna: Health Fund POS, Aetna: Open Access Elect Choice EPO, Aetna: Stanford University Faculty & Staff (SUFS) ACA High Deductible Health Plan POS II (ACA HDHP-POS II), Aetna: Aetna Select Open Access, Sutter Health Plan: Individual and Family Plan HMO, Provider Networks of America: PPO, Aetna: Health Fund HMO (aka HMO/HRA), TRICARE: Reserve Select, Health Net - Currently in 2027 Contract Negotiations: PPO for Small Business Health Options Program (SHOP)/Covered California, Aetna: Open Access Managed Choice POS, Health Net - Currently in 2027 Contract Negotiations: Health Net PPO, TRICARE: Extended Care Option (ECHO), Aetna: HMO, Sutter Health Plan: Large and Small Group HMO, TRICARE: Prime, Aetna: Open Choice PPO, SCAN: Sutter Senior Advantage, a SCAN Medicare Plan (HMO), Aetna: Aetna Select EPO, Aetna: Stanford University Faculty & Staff (SUFS) High Deductible Health Plan POS II (HDHP POS II) and TRICARE: Young Adult.

Insurance Accepted by Provider includes:

According to our sources, Dr. Melissa J. Williams, MD accepts the following insurance providers:

Private Healthcare Systems (PHCS)

WellCare

Medicare Advantage

MultiPlan

Magellan Health Services

Anthem Blue Cross of California

Blue Shield of California

United Healthcare

Cigna

Alliance PPO

HealthSmart

Aetna: Aetna Signature Administrators (ASA)

Aetna: Quality Point of Service (QPOS)

Aetna: Aetna Student Health Program

Aetna: National Advantage Plan (NAP)

Health Net - Currently in 2027 Contract Negotiations: SELECT three-tier POS and SELECT two-tier POS, Large and Small Group

Health Net - Currently in 2027 Contract Negotiations: Health Net HMO: Large Group (101+ employees) & Small Group (2-100 employees)

Health Net - Currently in 2027 Contract Negotiations: ELECT Open Access POS, Large and Small Group

Health Net - Currently in 2027 Contract Negotiations: ELECT POS, Large and Small Group

TRICARE: Prime Remote

Aetna: Stanford University Faculty & Staff (SUFS) - Copay Plan - Open Access Aetna Select

Health Net - Currently in 2027 Contract Negotiations: Salud HMO Plus Large/Custom Group

TRICARE: Select (formerly TRICARE Standard and TRICARE Extra)

TRICARE: Retired Reserve

Aetna: Aetna Choice POS II

Aetna: Traditional Choice

Aetna: HMO Deductible Plans

Aetna: Managed Choice POS

Aetna: Health Fund POS

Aetna: Open Access Elect Choice EPO

Aetna: Stanford University Faculty & Staff (SUFS) ACA High Deductible Health Plan POS II (ACA HDHP-POS II)

Aetna: Aetna Select Open Access

Sutter Health Plan: Individual and Family Plan HMO

Provider Networks of America: PPO

Aetna: Health Fund HMO (aka HMO/HRA)

TRICARE: Reserve Select

Health Net - Currently in 2027 Contract Negotiations: PPO for Small Business Health Options Program (SHOP)/Covered California

Aetna: Open Access Managed Choice POS

Health Net - Currently in 2027 Contract Negotiations: Health Net PPO

TRICARE: Extended Care Option (ECHO)

Aetna: HMO

Sutter Health Plan: Large and Small Group HMO

TRICARE: Prime

Aetna: Open Choice PPO

SCAN: Sutter Senior Advantage, a SCAN Medicare Plan (HMO)

Aetna: Aetna Select EPO

Aetna: Stanford University Faculty & Staff (SUFS) High Deductible Health Plan POS II (HDHP POS II)

TRICARE: Young Adult

Ratings & Reviews

Dr. Melissa J. Williams, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 747 ratings. We collect ratings and reviews of Dr. Melissa J. Williams, MD from all over the web to help you find the right in Davis, CA.

Overall Rating

(747 Ratings)

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General Payments

These charts describe general payments received by Dr. Melissa J. Williams, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Pfizer Inc.	$185 IBRANCE $77	BOSULIF $34	XALKORI $34	SUTENT $15	TORISEL $14	Other $11
Amgen Inc.	$155 XGEVA $91	Vectibix $63
EISAI INC.	$116 Halaven $62	ALOXI $54
Novartis Pharmaceuticals Corporation	$71 AFINITOR $46	ZYKADIA $25
Incyte Corporation	$46 JAKAFI $46
Other	$215 FASLODEX $35	Proleukin $25	XTANDI $24	Gilotrif $19	Avastin $15	Other $97

**Types of Payments**
Food and Beverage	$698
Education	$89

Biography

Dr. Melissa Williams practices adult hematology and adult oncology in Sacramento, CA. Dr. Williams has obtained a license to practice in California.

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Dr. Melissa J. Williams, MD

Office Locations

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD in 2024

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Average Medicare Patient Data From 2012 - 2024

Average of Total of Conditions of Medicare patients treated by Dr. Melissa J. Williams, MD From 2012 - 2024

Education & Training

Insurance Information

Ratings & Reviews

General Payments

Biography

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