David Fan, MD
Allergy & Immunology Physician · Walnut Creek, CA
David Fan, MD is an allergy & immunology physician with a practice address in Walnut Creek, California, and NPI 1619596152, issued on Apr 14, 2020. Check the license (California A176237, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Fan
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- A176237 CA
Self-reported in NPPES; status is on the state search - Practice location
- 320 Lennon LN Bldg 3, Walnut Creek, CA 94598
- Phone
- (925) 906-2015
- Enumerated
- Apr 14, 2020
- Record last updated
- Jun 24, 2025
- Medicare enrollment
- Enrolled (PECOS I20250630002345); accepts Medicare assignment
- Medical or professional school
- R Franklin University Of Med & Sci/Chicago Medical School, 2020
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 444 in California → Look up another NPI →
Also registered at 320 Lennon LN Bldg 3
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nancy Ngoc Giao Ly, MD, MPHOccupational Medicine Physician1598050205
Verify David Fan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A176237Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $249.49
2 payments; by number, the most common kind was food and beverage; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 2,496 providers of this specialty with any payment received $8,321.81 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).
David Fan among 444 allergy & immunology physician records in California
David Fan, MD is one of 444 allergy & immunology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 97% of them.
- NPI issued2020 · 97% of these records are older, under 1% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2020 · median 2004 among the 281 with a school on file
- Record last updated2025 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in California
There are 444 allergy & immunology physician records in California.
All 444 in California → Every provider in Walnut Creek → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Eric Chen, MDWalnut Creek, CA 945981558440222
- David Cook, MDWalnut Creek, CA 945981740282425
- Karna Gendo, M.D.Walnut Creek, CA 945981720164536
- Ilisten Jones, M.D., M.P.H.Walnut Creek, CA 945981407148943
- Toral Kamdar, M.D.Walnut Creek, CA 945981073776555
- Barbara Karpel, MDWalnut Creek, CA 945981033111729
- Matthew Lodewick, MDWalnut Creek, CA 945981922091362
- Nancy Mozelsio, MDWalnut Creek, CA 945981114910551
Common questions
What is David Fan, MD's NPI number?
David Fan, MD's National Provider Identifier (NPI) is 1619596152, issued on Apr 14, 2020. An NPI identifies a provider in billing; it is not a license.
Where is David Fan, MD located?
The NPPES record lists a practice address at 320 Lennon LN Bldg 3, Walnut Creek, CA, 94598. Phone: (925) 906-2015. Providers update this record themselves, so call before visiting.
How can I verify David Fan, MD's license?
NPPES lists California license number A176237, 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.
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.