IAN B BUTLER MD
NPI 1053632034
Internal Medicine - Critical Care Medicine in Oceanside, CA
About Ian B Butler Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
IAN B BUTLER MD (NPI 1053632034) is an individual critical care medicine provider in Oceanside, California, licensed in California (C137716) and active in the NPI registry since June 2010. He is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (2005).
NPPES Registry Identity
Specialties & Licenses 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Ian B Butler Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Ian Butler reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oceanside, CA 92056
- Reassigned Medicare billing, California enrollment
- 126 clinicians in this Medicare group
Escondido, CA 92029
- Reassigned Medicare billing, California enrollment
- 962 clinicians in this Medicare group
La Jolla, CA 92037
- Reassigned Medicare billing, California enrollment
- 278 clinicians in this Medicare group
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 1,437 clinicians in this Medicare group
San Antonio, TX 78251
- Reassigned Medicare billing, Texas enrollment
- 33 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92056 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Ian Butler's NPI number?
The NPI number for Ian Butler is 1053632034. It was assigned to this individual provider in the NPPES registry on June 14, 2010.
Where is Ian Butler located?
Ian Butler practices at 3231 Waring Ct Ste D, Oceanside, CA 92056. The listed phone number is (760) 941-0221.
What is Ian Butler's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Ian Butler enrolled in Medicare?
Yes. Ian Butler is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Ian Butler's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ian Butler reassigns Medicare benefits to 5 organizations: Cep America - Intensivists PC (Oceanside, CA), Galen Inpatient Physicians PC (Escondido, CA), Scripps Health Inpatient Providers Medical Group Inc. (La Jolla, CA), Emergency And Acute Care Medical Corporation (San Diego, CA) and Cepamerica Texas PA (San Antonio, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ian Butler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ian Butler accept?
Health plans from CHRISTUS Health Plan list Ian Butler as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Ian Butler was last updated on September 1, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Ian B Butler, MD · NPI 1053632034
Critical Care Medicine physician in Oceanside, California. Individual provider, active in the CMS NPPES registry since June 14, 2010.
## Identity
- **NPI:** 1053632034 (Entity type: Individual)
- **Enumerated:** June 14, 2010
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** C137716 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3231 WARING CT STE D, Oceanside, CA 92056-4510
- **Phone:** (760) 941-0221 · **Fax:** (760) 941-0905
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Cep America - Intensivists PC (NPI 1588383111, Oceanside, CA); Galen Inpatient Physicians PC (NPI 1720329675, Escondido, CA); Scripps Health Inpatient Providers Medical Group Inc. (NPI 1699043000, La Jolla, CA); Emergency And Acute Care Medical Corporation (NPI 1437103942, San Diego, CA); Cepamerica Texas PA (NPI 1932774080, San Antonio, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 2005
## Record status
- **NPPES last updated:** September 1, 2022
---
Source: [NPI Profile](https://npiprofile.com/npi/1053632034) · Data from the CMS NPPES public registry.