Michael B. Lash, MD
Otolaryngology Physician · Sonoma, CA
Michael B. Lash, MD is an otolaryngology physician with a practice address in Sonoma, California, and NPI 1487606281, issued on May 17, 2006. Check the license (California A21710, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Michael B. Lash
- Credential
- MD
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- A21710 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15000 Arnold Drive, Sonoma, CA 95431
- Phone
- (707) 938-6556
- Enumerated
- May 17, 2006
- Record last updated
- Sep 11, 2025
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Also registered at 15000 Arnold Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael B. Lash in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A21710Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Michael B. Lash among 1,212 otolaryngology physician records in California
Michael B. Lash, MD is one of 1,212 otolaryngology physician records with a practice address in California. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileNo · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 67% of these records are
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in California
There are 1,212 otolaryngology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,212 in California → Every provider in Sonoma → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Christopher Lombardo, MDClearlake, CA 954221639111404
- Douglas Hoffman, MDSanta Rosa, CA 954051932287927
- Rami Abdou, M.D.Santa Rosa, CA 954041700143013
- Annick Aubin-PouliotSanta Rosa, CA 954041205213170
- Elizabeth Cedars, M.D.Santa Rosa, CA 954041982947404
- William Combs, M.D.Santa Rosa, CA 954041073687539
- Mark Homicz, M.D.Santa Rosa, CA 954041336198449
- Niraj Lal, MDSanta Rosa, CA 954041770614059
Common questions
What is Michael B. Lash, MD's NPI number?
Michael B. Lash, MD's National Provider Identifier (NPI) is 1487606281, issued on May 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael B. Lash, MD located?
The NPPES record lists a practice address at 15000 Arnold Drive, Sonoma, CA, 95431. Phone: (707) 938-6556. Providers update this record themselves, so call before visiting.
How can I verify Michael B. Lash, MD's license?
NPPES lists California license number A21710, 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. 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.