Christina Daria Fonseca, M.D.
Dermatology Physician · Walnut Creek, CA
Christina Daria Fonseca, M.D. is a dermatology physician with a practice address in Walnut Creek, California, and NPI 1225222128, issued on Sep 4, 2007. Check the license (California A101459, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Christina Daria Fonseca
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A101459 CA
Self-reported in NPPES; status is on the state search - Practice location
- 320 Lennon Lane Kaiser Permanente Medical Group, Walnut Creek, CA 94598
- Phone
- (925) 617-5600
- Enumerated
- Sep 4, 2007
- Record last updated
- Jan 12, 2022
- Fax
- (916) 442-5702
- Medicare enrollment
- Enrolled (PECOS I20091109000292); accepts Medicare assignment
- Medical or professional school
- University Of Oklahoma College Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Verify Christina Daria Fonseca in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A101459Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average dermatology physician in 2024
268 Medicare Part D claims for 115 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Fluorouracil43 claims
- Clobetasol Propionate27 claims
- Calcipotriene20 claims
- Imiquimod16 claims
- Doxycycline Monohydrate12 claims
- Retin-A12 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: $159.84
2 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer 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 one group practice
- Permanente Medical Group IncWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christina Daria Fonseca among 2,083 dermatology physician records in California
Christina Daria Fonseca, M.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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 45% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2006 · median 2006 among the 1,450 with a school on file
- Record last updated2022 · 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 Walnut Creek → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Edward Becker, MDWalnut Creek, CA 945981962515858
- Paru Chaudhari, MDWalnut Creek, CA 945981811148224
- Errol Craig, M.D., PHDWalnut Creek, CA 945981659344281
- Nancy Franklin, MDWalnut Creek, CA 945981669550745
- Stacey Hunt, MDWalnut Creek, CA 945981841362688
- Stewart Kupetz, MDWalnut Creek, CA 945981366516973
- Min-Wei Lee, M.D.Walnut Creek, CA 945981124014741
- Shabnam Madani, MDWalnut Creek, CA 945981972681476
Common questions
What is Christina Daria Fonseca, M.D.'s NPI number?
Christina Daria Fonseca, M.D.'s National Provider Identifier (NPI) is 1225222128, issued on Sep 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Christina Daria Fonseca, M.D. located?
The NPPES record lists a practice address at 320 Lennon Lane Kaiser Permanente Medical Group, Walnut Creek, CA, 94598. Phone: (925) 617-5600. Providers update this record themselves, so call before visiting.
How can I verify Christina Daria Fonseca, M.D.'s license?
NPPES lists California license number A101459, 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 Christina Daria Fonseca, M.D. prescribe under Medicare Part D?
In 2024, Christina Daria Fonseca, M.D. had 268 Medicare Part D claims for 115 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.