Peter Cawood Butler, MD
Endocrinology, Diabetes & Metabolism Physician · Los Angeles, CA
Peter Cawood Butler, MD is an endocrinology, diabetes & metabolism physician with a practice address in Los Angeles, California, and NPI 1255366142, issued on Jul 11, 2006. Check the license (California C50362, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Peter Cawood Butler
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- C50362 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Medical Plaza, Los Angeles, CA 90095
- Phone
- (310) 825-7922
- Enumerated
- Jul 11, 2006
- Record last updated
- Jun 8, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicaid ID
- 00C503620 CA
- Medicare enrollment
- Enrolled (PECOS I20100315000397); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 200 Medical Plaza
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anita Agzarian, MDInternal Medicine Physician1144254590
- Sheila Ahmadi, MDEndocrinology, Diabetes & Metabolism Physician1194800094
- Marine Altunyan, PHARMDAmbulatory Care Pharmacist1578300083
- Gayane Ambartsumyan, MDObstetrics & Gynecology Physician1174556849
- Parviz Amid, M.D.Surgery Physician1073633459
- Adrienne Bawa, REGISTERED NURSECase Management Registered Nurse1497355366
Verify Peter Cawood Butler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C50362Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
869 Medicare Part D claims for 75 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 54% of claims.
Most prescribed
- Jardiance107 claims
- Metformin Hcl86 claims
- Trulicity82 claims
- Ozempic68 claims
- Atorvastatin Calcium51 claims
- Metformin Hcl Er48 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaPorter Ranch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter Cawood Butler among 1,131 endocrinology, diabetes & metabolism physician records in California
Peter Cawood Butler, MD is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 54% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1980 · median 2003 among the 779 with a school on file
- Record last updated2010 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Los Angeles → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Sheila Ahmadi, MDLos Angeles, CA 900951194800094
- Shalini Bhat, MDLos Angeles, CA 900951699821553
- Inder Chopra, MDLos Angeles, CA 900951124053921
- Christine Darwin, MDLos Angeles, CA 900951639104482
- Susan Davis, MDLos Angeles, CA 900951780600841
- Anthony Heaney, M.D.Los Angeles, CA 900951720016850
- David Heber, MDLos Angeles, CA 900951972522589
- Stanley Korenman, MDLos Angeles, CA 900951780603183
Common questions
What is Peter Cawood Butler, MD's NPI number?
Peter Cawood Butler, MD's National Provider Identifier (NPI) is 1255366142, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Peter Cawood Butler, MD located?
The NPPES record lists a practice address at 200 Medical Plaza, Los Angeles, CA, 90095. Phone: (310) 825-7922. Providers update this record themselves, so call before visiting.
How can I verify Peter Cawood Butler, MD's license?
NPPES lists California license number C50362, 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.
How much does Peter Cawood Butler, MD prescribe under Medicare Part D?
In 2024, Peter Cawood Butler, MD had 869 Medicare Part D claims for 75 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Peter Cawood Butler, MD's MIPS final score?
The 2023 MIPS final score is 86.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.