Frederick Butler, M.D.
NPI 1427088830 · Critical Care Medicine (Internal Medicine) Physician · Los Angeles, CA
Frederick Butler, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in Los Angeles, CA (NPI 1427088830).
Provider details
- NPI number
- 1427088830
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A73853 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-03
- Last updated
- 2007-07-09
Frequently asked questions
- What is Frederick Butler's NPI number?
- Frederick Butler's National Provider Identifier (NPI) is 1427088830, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frederick Butler's specialty?
- Frederick Butler is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Frederick Butler located?
- Frederick Butler's practice location on file with NPPES is 616 Witmer Street, Los Angeles, CA 90017-2395.
- What is Frederick Butler's phone number?
- The practice phone number listed in the NPPES registry for Frederick Butler is (213) 977-2423.
- Is Frederick Butler's NPI active?
- Yes — Frederick Butler's NPI (1427088830) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.