Daniel B. Klein, MD
Infectious Disease Physician · Hayward, CA
Daniel B. Klein, MD is an infectious disease physician with a practice address in Hayward, California, and NPI 1245318096, issued on Nov 1, 2006. Check the license (California G28140, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Daniel B. Klein
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- G28140 CA
Self-reported in NPPES; status is on the state search - Practice location
- 27400 Hesperian Blvd, Hayward, CA 94545
- Phone
- (510) 784-4000
- Enumerated
- Nov 1, 2006
- Record last updated
- Apr 30, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicaid ID
- 00G281400 CA
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 27400 Hesperian Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Daniel B. Klein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G28140Check 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: $33.76
1 payment: food and beverage; the largest payer was Dexcom, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 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.
Daniel B. Klein among 1,119 infectious disease physician records in California
Daniel B. Klein, MD is one of 1,119 infectious disease 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 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2014 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in Hayward → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Mark Finch, M.D.Hayward, CA 945451730248196
- Harkiran Grewal, MDCastro Valley, CA 945461790022416
- Steven Oppenheimer, MDCastro Valley, CA 945461962435396
- Michael Ascher, M.D.Lafayette, CA 945491033427505
- James Pennington, M.D.Lafayette, CA 945491184962144
- Loretta Obrien, MDLivermore, CA 945501750379657
- Muni Barash, M.D.Fremont, CA 945381962428896
- Harman Chawla, M.D.Fremont, CA 945381518251701
Common questions
What is Daniel B. Klein, MD's NPI number?
Daniel B. Klein, MD's National Provider Identifier (NPI) is 1245318096, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Daniel B. Klein, MD located?
The NPPES record lists a practice address at 27400 Hesperian Blvd, Hayward, CA, 94545. Phone: (510) 784-4000. Providers update this record themselves, so call before visiting.
How can I verify Daniel B. Klein, MD's license?
NPPES lists California license number G28140, 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.