Byron Andrew Knowles, M.D., PH.D.
Dermatology Physician · Modesto, CA
Byron Andrew Knowles, M.D., PH.D. is a dermatology physician with a practice address in Modesto, California, and NPI 1225586662, issued on Sep 14, 2016. Check the license (California A152031, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Byron Andrew Knowles
- Credential
- M.D., PH.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A152031 CA
Self-reported in NPPES; status is on the state search - Practice location
- 600 Coffee RD, Modesto, CA 95355
- Phone
- (916) 454-7533
- Enumerated
- Sep 14, 2016
- Record last updated
- Jun 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200710001699); accepts Medicare assignment
- Medical or professional school
- Vanderbilt University School Of Medicine, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 600 Coffee RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Byron Andrew Knowles in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A152031Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% more Medicare Part D claims than the average dermatology physician in 2024
1,391 Medicare Part D claims for 437 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Triamcinolone Acetonide230 claims
- Ketoconazole146 claims
- Ciclopirox141 claims
- Clobetasol Propionate114 claims
- Hydrocortisone100 claims
- Doxycycline Monohydrate62 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $886.21
28 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 10,250 providers of this specialty with any payment received $8,544.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Sutter Valley Medical FoundationSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Byron Andrew Knowles among 2,083 dermatology physician records in California
Byron Andrew Knowles, M.D., PH.D. is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 80% of them.
- NPI issued2016 · 80% of these records are older, 17% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2016 · median 2006 among the 1,450 with a school on file
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Modesto → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Marcus Connelly, MDModesto, CA 953551295703577
- Lily Park, D.O.Modesto, CA 953551124333455
- Thomas Salopek, MDModesto, CA 953551114983210
- Gary Wagner, M.D.Modesto, CA 953551235160102
- Michael Zang, M.D.Modesto, CA 953551528026358
- Thomas Hall, MDModesto, CA 953561770570814
- Blake Alexander, M.D.Modesto, CA 953501033132170
- Catherine Biren, M.D.Modesto, CA 953501124021035
Common questions
What is Byron Andrew Knowles, M.D., PH.D.'s NPI number?
Byron Andrew Knowles, M.D., PH.D.'s National Provider Identifier (NPI) is 1225586662, issued on Sep 14, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Byron Andrew Knowles, M.D., PH.D. located?
The NPPES record lists a practice address at 600 Coffee RD, Modesto, CA, 95355. Phone: (916) 454-7533. Providers update this record themselves, so call before visiting.
How can I verify Byron Andrew Knowles, M.D., PH.D.'s license?
NPPES lists California license number A152031, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Byron Andrew Knowles, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Byron Andrew Knowles, M.D., PH.D. had 1,391 Medicare Part D claims for 437 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.