David Hollander Lyon, M.D
Internal Medicine Physician · Modesto, CA
David Hollander Lyon, M.D is an internal medicine physician with a practice address in Modesto, California, and NPI 1538229638, issued on Dec 11, 2006. Check the license (California A43180, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Hollander Lyon
- Credential
- M.D
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A43180 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 Kansas Ave Ste B, Modesto, CA 95351
- Phone
- (209) 579-1151
- Enumerated
- Dec 11, 2006
- Record last updated
- Aug 30, 2024
- Fax
- (209) 579-9605
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1100 Kansas Ave Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify David Hollander Lyon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A43180Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
15 Medicare Part D claims for 11 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
David Hollander Lyon among 17,696 internal medicine physician records in California
David Hollander Lyon, M.D is one of 17,696 internal medicine 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
129 internal medicine physician records list a practice address in Modesto
They are 129 of the 9,262 NPPES records with a practice address in Modesto, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Modesto → Internal Medicine Physician nationwide →
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- Weizheng Jiang, MDModesto, CA 953501275023780
Common questions
What is David Hollander Lyon, M.D's NPI number?
David Hollander Lyon, M.D's National Provider Identifier (NPI) is 1538229638, issued on Dec 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Hollander Lyon, M.D located?
The NPPES record lists a practice address at 1100 Kansas Ave Ste B, Modesto, CA, 95351. Phone: (209) 579-1151. Providers update this record themselves, so call before visiting.
How can I verify David Hollander Lyon, M.D's license?
NPPES lists California license number A43180, 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 David Hollander Lyon, M.D prescribe under Medicare Part D?
In 2024, David Hollander Lyon, M.D had 15 Medicare Part D claims for 11 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.