David Lyons Kaufman, MD
Internal Medicine Physician · Mountain View, CA
David Lyons Kaufman, MD is an internal medicine physician with a practice address in Mountain View, California, and NPI 1720013782, issued on Jul 11, 2006. Check the license (California G89230, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Lyons Kaufman
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- G89230 CA
135662 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2500 Hospital Dr, Mountain View, CA 94040
- Phone
- (650) 691-8633
- Enumerated
- Jul 11, 2006
- Record last updated
- Aug 1, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (650) 644-0259
- Medicaid ID
- 01018184 NY
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2500 Hospital Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify David Lyons Kaufman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G89230Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average internal medicine physician in 2024
683 Medicare Part D claims for 40 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Maraviroc61 claims
- Fludrocortisone Acetate50 claims
- Sodium Chloride41 claims
- Cromolyn Sodium35 claims
- Hydrocortisone32 claims
- Tenofovir Disoproxil Fumarate26 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: $143.28
1 payment: food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
David Lyons Kaufman among 17,696 internal medicine physician records in California
David Lyons Kaufman, MD 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 updated2013 · 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).
119 internal medicine physician records list a practice address in Mountain View
They are 119 of the 2,467 NPPES records with a practice address in Mountain View, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Mountain View → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ravin Agah, M.D.Mountain View, CA 940401528075017
- Galina Balon, MDMountain View, CA 940401114932571
- Barbara Campbell, M.D.Mountain View, CA 940401679597405
- Steven Carlson, MDMountain View, CA 940401902813496
- Dean Cummings, MDMountain View, CA 940401265454029
- Vivien D'Andrea, MDMountain View, CA 940401760497135
- Francis Garrett, MDMountain View, CA 940401295799724
- Shuichi Kobayashi, M.D.Mountain View, CA 940401871509752
Common questions
What is David Lyons Kaufman, MD's NPI number?
David Lyons Kaufman, MD's National Provider Identifier (NPI) is 1720013782, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Lyons Kaufman, MD located?
The NPPES record lists a practice address at 2500 Hospital Dr, Mountain View, CA, 94040. Phone: (650) 691-8633. Providers update this record themselves, so call before visiting.
How can I verify David Lyons Kaufman, MD's license?
NPPES lists California license number G89230, 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 Lyons Kaufman, MD prescribe under Medicare Part D?
In 2024, David Lyons Kaufman, MD had 683 Medicare Part D claims for 40 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.