Mather Humphrey Neill, M.D
Emergency Medicine Physician · Greenbae, CA
Mather Humphrey Neill, M.D is an emergency medicine physician with a practice address in Greenbae, California, and NPI 1073612537, issued on Sep 21, 2006. Check the license (California G31458, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mather Humphrey Neill
- Credential
- M.D
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G31458 CA
Self-reported in NPPES; status is on the state search - Practice location
- 250 Bon Air Road, Greenbae, CA 94902
- Phone
- (415) 925-7000
- Enumerated
- Sep 21, 2006
- Record last updated
- Oct 26, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00G314580 CA
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Verify Mather Humphrey Neill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G31458Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mather Humphrey Neill among 7,751 emergency medicine physician records in California
Mather Humphrey Neill, M.D is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileNo · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2007 · 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 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,751 in California → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Morgan Camp, MDSan Rafael, CA 949031407845738
- Cynthia Clark, MDSan Rafael, CA 949031144219767
- John David, MDSan Rafael, CA 949031912081993
- Anna Denham, MDSan Rafael, CA 949031750465738
- Jennifer Grayzar, M.D.San Rafael, CA 949031336160530
- Douglas Harris, MDSan Rafael, CA 949031073697066
- Kurt Kunzel, MDSan Rafael, CA 949031073502696
- Robert Martin, M.DMarysville, CA 949011205876208
Common questions
What is Mather Humphrey Neill, M.D's NPI number?
Mather Humphrey Neill, M.D's National Provider Identifier (NPI) is 1073612537, issued on Sep 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mather Humphrey Neill, M.D located?
The NPPES record lists a practice address at 250 Bon Air Road, Greenbae, CA, 94902. Phone: (415) 925-7000. Providers update this record themselves, so call before visiting.
How can I verify Mather Humphrey Neill, M.D's license?
NPPES lists California license number G31458, 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.