Katharine Ball, M.D.
Dermatology Physician · Saratoga, CA
Katharine Ball, M.D. is a dermatology physician with a practice address in Saratoga, California, and NPI 1801004650, issued on May 17, 2007. Check the license (California A106522, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katharine Ball
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License numbers
- A106522 CA
C7-0003735 DE
Self-reported in NPPES; status is on the state search - Practice location
- 18988 Cox Ave Ste B, Saratoga, CA 95070
- Phone
- (408) 253-4407
- Enumerated
- May 17, 2007
- Record last updated
- Mar 7, 2024
- Fax
- (408) 253-4499
- Medicare enrollment
- Enrolled (PECOS I20120104000715); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 2007
- Entity
- Type 1 · individual
Also registered at 18988 Cox Ave Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer DoPhysician Assistant1235091166
Verify Katharine Ball in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A106522Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% more Medicare Part D claims than the average dermatology physician in 2024
801 Medicare Part D claims for 376 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Ketoconazole125 claims
- Triamcinolone Acetonide107 claims
- Cephalexin102 claims
- Fluocinonide76 claims
- Clobetasol Propionate44 claims
- Doxycycline Hyclate33 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $973.16
38 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. 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 2 group practices
- Csi Medical GroupSaratoga, CA
- Sutter Bay Medical FoundationLos Altos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
Other dermatology physician records in California
- Sam Abaza, M.D.Diamond Bar, CA1831148501
- Farah Abdulla, MDDuarte, CA1093934390
- Robert Abergel, M.D.Santa Monica, CA1841565843
- Karen Abisogun, MDLos Angeles, CA1124474515
- Glynis Ablon, M.D.Manhattan Beach, CA1144292889
- Arthur Abrams, MDMountain View, CA1518093178
- Payam Abrishami, MDAgoura Hills, CA1447288147
- Aseel Abu-NasserRedding, CA1609641711
- Rachel Abuav, M.D.Beverly Hills, CA1356481733
- Boya Abudu, MD, MPHSacramento, CA1336608637
Common questions
What is Katharine Ball, M.D.'s NPI number?
Katharine Ball, M.D.'s National Provider Identifier (NPI) is 1801004650, issued on May 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Katharine Ball, M.D. located?
The NPPES record lists a practice address at 18988 Cox Ave Ste B, Saratoga, CA, 95070. Phone: (408) 253-4407. Providers update this record themselves, so call before visiting.
How can I verify Katharine Ball, M.D.'s license?
NPPES lists California license number A106522, 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 Katharine Ball, M.D. prescribe under Medicare Part D?
In 2024, Katharine Ball, M.D. had 801 Medicare Part D claims for 376 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is Katharine Ball, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.