Ian B. Butler, MD
Critical Care Medicine (Internal Medicine) Physician · Oceanside, CA
Ian B. Butler, MD is a critical care medicine (internal medicine) physician with a practice address in Oceanside, California, and NPI 1053632034, issued on Jun 14, 2010. Check the license (California C137716, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ian B. Butler
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License numbers
- C137716 CA
MD439803 PA
H5896 TX
Self-reported in NPPES; status is on the state search - Practice location
- 3231 Waring CT Ste D, Oceanside, CA 92056
- Phone
- (760) 941-0221
- Enumerated
- Jun 14, 2010
- Record last updated
- Sep 1, 2022
- Fax
- (760) 941-0905
- Medicare enrollment
- Enrolled (PECOS I20151006003142); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2005
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 723 in California → Look up another NPI →
Verify Ian B. Butler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C137716Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Cep America - Intensivists PCBakersfield, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ian B. Butler among 723 critical care medicine (internal medicine) physician records in California
Ian B. Butler, MD is one of 723 critical care medicine (internal medicine) physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 64% of them.
- NPI issued2010 · 64% of these records are older, 32% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2005 · median 2005 among the 559 with a school on file
- Record last updated2022 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in California
There are 723 critical care medicine (internal medicine) physician records in California.
All 723 in California → Every provider in Oceanside → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Ranju Soni, M.D.Poway, CA 920641417991282
- Laura Barnes, MDLa Jolla, CA 920371558749242
- Ashley Binder, MDLa Jolla, CA 920371265775365
- Ayana Boyd King, D.O.La Jolla, CA 920371760530794
- Claire Davis, M.D.La Jolla, CA 920371962933242
- Sean Dewolf, MDLa Jolla, CA 920371518312230
- Preeti Gupta, MDLa Jolla, CA 920371861926123
- Nicholas Huynh, M.D.La Jolla, CA 920371427322197
Common questions
What is Ian B. Butler, MD's NPI number?
Ian B. Butler, MD's National Provider Identifier (NPI) is 1053632034, issued on Jun 14, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Ian B. Butler, MD located?
The NPPES record lists a practice address at 3231 Waring CT Ste D, Oceanside, CA, 92056. Phone: (760) 941-0221. Providers update this record themselves, so call before visiting.
How can I verify Ian B. Butler, MD's license?
NPPES lists California license number C137716, 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.