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Byron Andrew Knowles, MD

Dermatology · Modesto

NPI 1225586662

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
15
3 carriers
Offices
2

Offices

2 locations · Sutter Valley Medical Foundation · 2,473 clinicians in this group

Looking this up.

Plans that list them

15 plans · 3 carriers

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Knowles’s office at (209) 524-1211 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

15 of 15 plans

Plans whose provider directory lists this clinician
Alignment Health BreathEasy (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Clarity (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Harmony (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes CalPlus (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes Care (HMO C-SNP)Alignment Health PlanListedSep 28, 2026
Alignment Health Heart & Diabetes Choice (HMO C-SNP)Alignment Health PlanListedSep 28, 2026
Alignment Health Honor+ Plan (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health My Choice CalCare (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health Silicon (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health smartHMO (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health the ONE (HMO)Alignment Health PlanListedOct 3, 2026
Anthem Full Dual Advantage Aligned (HMO D-SNP)Anthem Blue CrossListedOct 3, 2026
Anthem Medicare Advantage (HMO-POS)Anthem Blue CrossListedOct 3, 2026
Anthem Prime (HMO-POS)Anthem Blue Cross Partnership PlanListedOct 3, 2026

California Medical Board record

Licence A152031 · Current

Licensed to practise in California · since 2017 · expires 2027-10-31 · Vanderbilt University School of Medicine.

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

Original Medicare doctor bills

$170,272

Medicare paid this office $170,272 for 625 people.

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

Largest Original Medicare bills
Short return visit (20+ min)470$45,670$66
Destruction of skin growth, 1-14 growths261$27,543$82
Destruction of precancer skin growth, 1 growth322$16,735$38
Return visit (30+ min)156$13,592$70
New patient visit (30+ min)158$12,171$77
See all 17 services
Every Original Medicare service billed
Short return visit (20+ min)470$45,670$66
Destruction of skin growth, 1-14 growths261$27,543$82
Destruction of precancer skin growth, 1 growth322$16,735$38
Return visit (30+ min)156$13,592$70
New patient visit (30+ min)158$12,171$77
Destruction of precancer skin growth, 2-14 growths245$8,494$5
Destruction of precancer skin growth, 15 or more growths38$7,160$130
Shaving of skin growth of body, arms, or legs, 0.6-1.0 cm49$5,369$89
Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 0.6-1.0 cm30$3,317$95
Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm11$2,826$235
Shaving of skin growth of body, arms, or legs, 1.1-2.0 cm23$2,464$103
Destruction of cancer skin growth of trunk, arms, or legs, 1.1-2.0 cm11$1,959$115
Biopsy of related skin growth, first growth33$1,932$57
Shaving of skin growth of scalp, neck, hands, feet, or genitals, 1.1-2.0 cm11$1,269$115
Destruction of skin growth, 15 or more growths11$1,059$88
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's70$1,009$13
Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 0.5 cm or less13$977$75

Procedures Medicare counted

Procedure volume Medicare published
Melanoma (skin cancer) excision1-10None
Removal of nail tissue1-10None
Removal of skin lesions1267More than 95% of doctors who do this
Removal or shaving of skin growth129More than 87% of doctors who do this
Skin biopsy19More than 63% of doctors who do this

Who their Medicare patients are

625 Original Medicare patients in 2024. Average age 74 · Under 65 7% · 85 and older 12% · Women 58% · Also on Medicaid 15% · Health risk score 1.25. Above the middle of the specialty; the typical dermatology clinician is at 1.01.

Conditions among them: High blood pressure 74% · Chronic kidney disease 29% · Diabetes 27% · Coronary heart disease 20% · Atrial fibrillation 18% · Depression 18% · Cancer 17% · COPD 13% · Heart failure 12% · Stroke 5% · Dementia 4%.

The office billed $859,573, Medicare allowed $239,113 and paid $170,272; for 4,397 services of 53 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

Original Medicare by year
20246254,397741.25$859,573$170,272
20235183,036741.08$642,585$140,733
20225003,486731.07$747,735$161,037
20213041,669741.01$332,726$88,966
20203055721.10$9,618$4,899

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: 11 services

Original Medicare services billed in 2023
Return visit (30+ min)216$30,981$88
Short return visit (20+ min)272$25,186$66
Destruction of skin growth, 1-14 growths219$23,990$90
Destruction of precancer skin growth, 1 growth261$14,419$40
New patient visit (30+ min)141$11,303$80
Destruction of precancer skin growth, 2-14 growths200$6,441$5
Destruction of precancer skin growth, 15 or more growths27$5,251$135
Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 0.6-1.0 cm28$3,332$111
Shaving of skin growth of body, arms, or legs, 0.6-1.0 cm31$2,983$93
Biopsy of related skin growth, first growth28$2,046$73
Shaving of skin growth of body, arms, or legs, 1.1-2.0 cm16$1,859$98

2022: 17 services

Original Medicare services billed in 2022
Return visit (30+ min)216$30,697$84
Destruction of skin growth, 1-14 growths216$24,259$84
Short return visit (20+ min)244$24,082$67
Destruction of precancer skin growth, 1 growth268$13,640$37
New patient visit (30+ min)159$12,271$77
Destruction of precancer skin growth, 15 or more growths57$11,137$134
Destruction of precancer skin growth, 2-14 growths208$7,609$5
Shaving of skin growth of body, arms, or legs, 1.1-2.0 cm42$4,738$99
Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 0.6-1.0 cm37$4,592$102
Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm15$3,774$252
New patient visit (45+ min)30$3,312$110
Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 1.1-2.0 cm20$2,496$119
Destruction of cancer skin growth of trunk, arms, or legs, 1.1-2.0 cm13$2,110$117
Shaving of skin growth of body, arms, or legs, 0.6-1.0 cm18$1,794$78
Biopsy of related skin growth, first growth23$1,423$62
Injection into skin growth, 1-7 growths11$550$37
Injection, triamcinolone acetonide, not otherwise specified, 10 mg11$30None

2021: 13 services

Original Medicare services billed in 2021
Return visit (30+ min)201$27,791$101
Destruction of skin growth, 1-14 growths107$11,993$94
New patient visit (45+ min)60$8,239$137
Destruction of precancer skin growth, 15 or more growths43$7,475$141
Destruction of precancer skin growth, 1 growth126$6,057$42
Destruction of precancer skin growth, 2-14 growths108$4,158$6
New patient visit (30+ min)47$3,872$82
Long return visit (40+ min)15$2,682$141
Shaving of skin growth of body, arms, or legs, 1.1-2.0 cm19$2,495$108
Short return visit (20+ min)25$2,221$79
Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 0.6-1.0 cm19$2,218$101
Biopsy of related skin growth, first growth16$1,350$79
Injection, triamcinolone acetonide, not otherwise specified, 10 mg11$32None

2020: 1 service

Original Medicare services billed in 2020
Return visit (30+ min)21$2,558$102

Medicaid work

$1,088 in 2024

Medicaid paid $1,088 for 26 billed services this clinician did in 2024, up to 13 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.

Largest Medicaid services in 2024
Short return visit (20+ min)26$1,088
Medicaid work by year
202426113$1,088
2021219535$4,544
202047219$7,796
See the largest Medicaid services in earlier years

2021

Largest Medicaid services in 2021
Clinic visit/encounter, all-inclusive14$4,198
Return visit (30+ min)154$346
Short return visit (20+ min)15$0
Eligible clinician attests to documenting in the medical record they obtained, updated, or reviewed the patient's current medications24$0
Service12$0

2020

Largest Medicaid services in 2020
Clinic visit/encounter, all-inclusive28$7,796
Return visit (30+ min)19$0

Drugs they prescribed that Part D paid

$944,257

Pharmacies billed $944,257 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 1,391) in 2024. At or below the middle of the specialty; the typical dermatology clinician is at 0%.

1,282 generic and 109 brand-name prescriptions · $944,257 in drug cost · 74 antibiotic prescriptions to 30 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
Skyrizi13$244,466$18,805
Tremfya11$144,258$13,114
Cosentyx Unoready11$120,409$10,946
Clobetasol Propionate114$5,488$48
Ciclopirox141$5,103$36
See all 23 drugs
Every Part D drug this clinician prescribed
Skyrizi13$244,466$18,805
Tremfya11$144,258$13,114
Cosentyx Unoready11$120,409$10,946
Clobetasol Propionate114$5,488$48
Ciclopirox141$5,103$36
Fluorouracil57$4,952$87
Tacrolimus27$4,529$168
Triamcinolone Acetonide230$3,233$14
Ketoconazole146$2,514$17
Metronidazole46$2,079$45
Tretinoin30$2,072$69
Sulfacetamide15$1,818$121
Doxycycline Monohydrate62$1,359$22
Ciclopirox65$1,216$19
Betamethasone Diprop Augmented24$1,071$45
Terbinafine37$930$25
Permethrin16$740$46
Hydrocortisone100$685$7
Mupirocin32$320$10
Gabapentin27$151$6
Spironolactone12$145$12
Doxycycline Hyclate12$94$8
Methotrexate16$61$4

Year by year

Part D prescribing by year
20241,3914370% (0)8%$944,257
20231,3203890% (0)5%$428,831
20221,1643900% (0)6%$364,644
20211,0102540% (0)7%$126,880
2020284710% (0)10%$13,026
201920110% (0)None$1,883
201841None0% (0)27%$10,279

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

See the drugs prescribed each year

2023: 19 drugs

Part D drugs prescribed in 2023
Clobetasol Propionate92$6,626$72
Ciclopirox126$5,907$47
Fluorouracil56$5,444$97
Ketoconazole156$3,943$25
Triamcinolone Acetonide202$3,614$18
Permethrin34$2,372$70
Ciclopirox68$2,321$34
Tretinoin18$1,874$104
Betamethasone Diprop Augmented34$1,700$50
Metronidazole20$1,587$79
Doxycycline Monohydrate59$1,558$26
Betamethasone Dipropionate11$1,209$110
Hydrocortisone121$1,041$9
Hydroxychloroquine Sulfate25$1,000$40
Ivermectin12$717$60
Spironolactone15$559$37
Valacyclovir16$453$28
Mupirocin48$434$9
Gabapentin21$120$6

2022: 21 drugs

Part D drugs prescribed in 2022
Humira(Cf)12$124,611$10,384
Fluorouracil65$7,794$120
Ciclopirox90$4,321$48
Clobetasol Propionate54$4,038$75
Ketoconazole125$3,703$30
Betamethasone Diprop Augmented35$3,552$101
Triamcinolone Acetonide191$3,110$16
Ciclopirox83$2,825$34
Metronidazole32$2,024$63
Permethrin23$1,850$80
Tretinoin18$1,731$96
Sulfacetamide15$1,569$105
Tacrolimus11$1,319$120
Doxycycline Monohydrate58$1,175$20
Hydroxychloroquine Sulfate25$1,015$41
Hydrocortisone89$746$8
Fluocinonide13$715$55
Mupirocin38$531$14
Spironolactone20$518$26
Valacyclovir15$375$25
Gabapentin30$253$8

2021: 22 drugs

Part D drugs prescribed in 2021
Clobetasol Propionate61$8,497$139
Fluorouracil48$6,186$129
Betamethasone Diprop Augmented42$4,194$100
Triamcinolone Acetonide184$3,500$19
Fluocinonide44$2,814$64
Ciclopirox54$2,805$52
Ketoconazole111$2,701$24
Tacrolimus11$2,250$205
Halobetasol Propionate12$1,740$145
Desonide11$1,555$141
Methotrexate39$1,501$38
Betamethasone Dipropionate18$1,386$77
Metronidazole13$986$76
Permethrin15$979$65
Ciclopirox36$751$21
Hydrocortisone69$528$8
Doxycycline Monohydrate16$460$29
Gabapentin77$401$5
Valacyclovir11$253$23
Mupirocin28$226$8
Terbinafine11$122$11
Hydroxyzine13$59$5

2020: 7 drugs

Part D drugs prescribed in 2020
Triamcinolone Acetonide63$1,392$22
Betamethasone Diprop Augmented15$1,129$75
Fluocinonide15$1,012$67
Ketoconazole17$311$18
Betamethasone Valerate12$296$25
Hydrocortisone22$132$6
Gabapentin23$118$5

2018: 1 drug

Part D drugs prescribed in 2018
Betamethasone Dipropionate12$653$54

Money from drug and device companies

$949 in 2025

Industry payments by year
20251132None$949
2024928None$886
202334None$123
202134None$104
202011None$26
201911None$97

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

A payment is not proof that care is biased.

Payments by company
Janssen BiotechTremfya$266
8 payments
  • Meals for Tremfya · 2025-09-24 · $31
  • Meals for Tremfya · 2025-08-27 · $24
  • Meals for Tremfya · 2025-07-16 · $42
  • Meals for Tremfya · 2025-05-28 · $43
  • Meals for Tremfya · 2025-04-23 · $29
  • Meals for Tremfya · 2025-03-12 · $28
  • Meals for Tremfya · 2025-02-19 · $42
  • Meals for Tremfya · 2025-01-29 · $27
UcbBimzelx$133
3 payments
  • Meals for Bimzelx · 2025-04-03 · $47
  • Meals for Bimzelx · 2025-02-27 · $44
  • Meals for Bimzelx · 2025-01-16 · $42
Regeneron Healthcare SolutionsDupixent$122
4 payments
  • Meals for Dupixent · 2025-09-18 · $35
  • Meals for Dupixent · 2025-06-13 · $16
  • Meals for Dupixent · 2025-04-17 · $35
  • Meals for Dupixent · 2025-02-06 · $36
AbbvieSkyrizi$98
4 payments
  • Meals for Skyrizi · 2025-11-19 · $29
  • Meals for Skyrizi · 2025-10-22 · $24
  • Meals for Rinvoq · 2025-07-09 · $18
  • Meals for Skyrizi · 2025-05-07 · $27
Lilly USATaltz$80
3 payments
  • Meals for Taltz · 2025-08-20 · $26
  • Meals for Taltz · 2025-07-23 · $29
  • Meals for Taltz · 2025-06-04 · $25
IncyteOpzelura$68
3 payments
  • Meals for Opzelura · 2025-08-07 · $25
  • Meals for Opzelura · 2025-05-22 · $28
  • Meals for Opzelura · 2025-04-03 · $15
See all 32 published payments
Every published payment
Novartis PharmaceuticalsMeals · 2025-11-19Cosentyx$18
AbbvieMeals · 2025-11-19Skyrizi$29
LEO PharmaMeals · 2025-11-12Anzupgo$30
Novartis PharmaceuticalsMeals · 2025-11-05Rhapsido$34
AbbvieMeals · 2025-10-22Skyrizi$24
LEO PharmaMeals · 2025-10-01Anzupgo$27
Janssen BiotechMeals · 2025-09-24Tremfya$31
Regeneron Healthcare SolutionsMeals · 2025-09-18Dupixent$35
Janssen BiotechMeals · 2025-08-27Tremfya$24
Lilly USAMeals · 2025-08-20Taltz$26
IncyteMeals · 2025-08-07Opzelura$25
Lilly USAMeals · 2025-07-23Taltz$29
Janssen BiotechMeals · 2025-07-16Tremfya$42
AbbvieMeals · 2025-07-09Rinvoq$18
Regeneron Healthcare SolutionsMeals · 2025-06-13Dupixent$16
Lilly USAMeals · 2025-06-04Taltz$25
PfizerEducation · 2025-05-30Cibinqo$15
Janssen BiotechMeals · 2025-05-28Tremfya$43
IncyteMeals · 2025-05-22Opzelura$28
AbbvieMeals · 2025-05-07Skyrizi$27
Janssen BiotechMeals · 2025-04-23Tremfya$29
Regeneron Healthcare SolutionsMeals · 2025-04-17Dupixent$35
UcbMeals · 2025-04-03Bimzelx$47
IncyteMeals · 2025-04-03Opzelura$15
Janssen BiotechMeals · 2025-03-12Tremfya$28
UcbMeals · 2025-02-27Bimzelx$44
Janssen BiotechMeals · 2025-02-19Tremfya$42
Regeneron Healthcare SolutionsMeals · 2025-02-06Dupixent$36
Janssen BiotechMeals · 2025-01-29Tremfya$27
Arcutis BiotherapeuticsMeals · 2025-01-22Zoryve$23
UcbMeals · 2025-01-16Bimzelx$42
AmgenMeals · 2025-01-08Otezla$33
See earlier years (2024, 2023, 2021, 2020, 2019)

2024: $886

Payments by company in 2024
Lilly USATaltz$301
10 payments
  • Meals for Taltz · 2024-12-05 · $32
  • Meals for Taltz · 2024-10-30 · $9
  • Meals for Taltz · 2024-10-10 · $35
  • Meals for Taltz · 2024-09-12 · $34
  • Meals for Taltz · 2024-08-22 · $26
  • Meals for Taltz · 2024-08-22 · $5
  • Education · 2024-08-05 · $99
  • Meals for Taltz · 2024-05-23 · $32
  • Meals for Taltz · 2024-03-06 · $1
  • Meals for Taltz · 2024-03-06 · $28
Janssen BiotechTremfya$176
5 payments
  • Meals for Tremfya · 2024-10-16 · $41
  • Meals for Tremfya · 2024-08-15 · $30
  • Meals for Tremfya · 2024-07-31 · $38
  • Meals for Tremfya · 2024-05-29 · $23
  • Meals for Tremfya · 2024-04-24 · $44
Novartis PharmaceuticalsCosentyx$96
3 payments
  • Meals for Cosentyx · 2024-08-28 · $34
  • Meals for Cosentyx · 2024-07-25 · $33
  • Meals for Cosentyx · 2024-02-21 · $29
LEO PharmaAdbry$88
3 payments
  • Meals for Adbry · 2024-12-12 · $28
  • Meals for Adbry · 2024-09-17 · $25
  • Meals for Adbry · 2024-07-10 · $35
GenzymeDupixent$76
2 payments
  • Meals for Dupixent · 2024-11-20 · $46
  • Meals for Dupixent · 2024-04-10 · $30
IncyteOpzelura$48
2 payments
  • Meals for Opzelura · 2024-10-02 · $24
  • Meals for Opzelura · 2024-06-11 · $24
UcbBimzelx$44
1 payment
  • Meals for Bimzelx · 2024-04-18 · $44
Regeneron Healthcare SolutionsDupixent$34
1 payment
  • Meals for Dupixent · 2024-07-25 · $34
Arcutis BiotherapeuticsZoryve$24
1 payment
  • Meals for Zoryve · 2024-10-24 · $24

2023: $123

Payments by company in 2023
Janssen BiotechTremfya$60
2 payments
  • Meals for Tremfya · 2023-12-06 · $24
  • Meals for Tremfya · 2023-10-11 · $36
Regeneron Healthcare SolutionsDupixent$39
1 payment
  • Meals for Dupixent · 2023-10-26 · $39
IncyteOpzelura$24
1 payment
  • Meals for Opzelura · 2023-11-29 · $24

2021: $104

Payments by company in 2021
AbbVieSkyrizi$50
2 payments
  • Meals for Skyrizi · 2021-03-22 · $29
  • Meals for Skyrizi · 2021-01-26 · $22
Janssen BiotechTremfya$31
1 payment
  • Meals for Tremfya · 2021-09-08 · $31
AmgenOtezla$23
1 payment
  • Meals for Otezla · 2021-10-28 · $23

2020: $26

Payments by company in 2020
AbbVieSkyrizi$26
1 payment
  • Meals for Skyrizi · 2020-10-23 · $26

2019: $97

Payments by company in 2019
AllerganNone$97
1 payment
  • Meals · 2019-03-02 · $97

Professional record

NPI
1225586662
Licence
CA A152031California A152031: Current · expires 2027-10-31
Trained
Vanderbilt University School of Medicine, 2016
Video visits
Lists video visits
Gender
Male
More record details
Sole proprietor
Yes
Taxonomy
Federal specialty code 207N00000X (207N00000X); Student in a training program (390200000X)
Mailing address
Po Box 255228, Sacramento, CA, 95865
NPI first listed
2016-09-14
NPI last updated
2021-06-28
NPI record certified
2021-06-28

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

Extra NPI addresses: 991 Montague Expy Ste 104, Milpitas, CA, 95035 · 751 S. Bascom Ave, San Jose, CA, 95128