John Hewitt, MD
Emergency Medicine Physician · Clearlake, CA
John Hewitt, MD is an emergency medicine physician with a practice address in Clearlake, California, and NPI 1902840176, issued on Jun 16, 2006. Check the license (California A31314, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Hewitt
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A31314 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15630 18TH Ave, Clearlake, CA 95422
- Phone
- (707) 995-5890
- Enumerated
- Jun 16, 2006
- Record last updated
- Jul 14, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid ID
- 1902840176 CA
- Entity
- Type 1 · individual
Also registered at 15630 18TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John ClarkeAnesthesiology Physician1053329359
- Martina Cordova, FNPFamily Nurse Practitioner1114793643
- Laurie Halversen, LCSWClinical Social Worker1356649545
- Stephenie Hargrove, NPFamily Nurse Practitioner1053927608
- Thomas Kreck, MDCritical Care Medicine (Internal Medicine) Physician1457439200
- Linnea Lantz, DOEmergency Medicine Physician1841759974
Verify John Hewitt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A31314Check 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: $33.25
1 payment: food and beverage; the largest payer was Abbvie Inc. The 12,335 providers of this specialty with any payment received $953.79 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.
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
Other emergency medicine physician records in California
- Cooper Aakhus, MDStanford, CA1194351007
- Pyra Aarden, MDMartinez, CA1417058199
- Neal Aaron, D.O.Encinitas, CA1114283520
- Eric AaserudeWalnut Creek, CA1811491194
- Nader Abas, MDBarstow, CA1346288305
- Michael Abbo, MDNovato, CA1205819042
- Daniel Abbott, MDFullerton, CA1518907864
- Paul-Andre Abboud, M.D.Oakland, CA1710065503
- Mostafa Abdel-Hamid, MDStanford, CA1457918740
- Ashraf Abdel-KerimChino, CA1396961538
Common questions
What is John Hewitt, MD's NPI number?
John Hewitt, MD's National Provider Identifier (NPI) is 1902840176, issued on Jun 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Hewitt, MD located?
The NPPES record lists a practice address at 15630 18TH Ave, Clearlake, CA, 95422. Phone: (707) 995-5890. Providers update this record themselves, so call before visiting.
How can I verify John Hewitt, MD's license?
NPPES lists California license number A31314, 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.