Alexander Robert Peck, DO
Rheumatology Physician · Los Angeles, CA
Alexander Robert Peck, DO is a rheumatology physician with a practice address in Los Angeles, California, and NPI 1588197545, issued on Apr 6, 2017. Check the license (California 20A18318, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexander Robert Peck
- Credential
- DO
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 20A18318 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5230 Pacific Concourse Dr Ste 100, Los Angeles, CA 90045
- Phone
- (310) 297-9221
- Enumerated
- Apr 6, 2017
- Record last updated
- Apr 15, 2024
- Fax
- (310) 297-9222
- Medicare enrollment
- Enrolled (PECOS I20220902001500); accepts Medicare assignment
- Medical or professional school
- Arizona College Of Osteopathic Medicine Mid Western University, 2017
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Verify Alexander Robert Peck in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A18318Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average rheumatology physician in 2024
861 Medicare Part D claims for 177 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 35 claims were for opioids.
Most prescribed
- Methotrexate132 claims
- Prednisone110 claims
- Hydroxychloroquine Sulfate72 claims
- Leflunomide48 claims
- Celecoxib39 claims
- Tramadol Hcl35 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.
Industry payments in 2024: $3,467.92
115 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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.
Bills Medicare through one group practice
- Pacific Arthritis Care Center IncLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander Robert Peck among 926 rheumatology physician records in California
Alexander Robert Peck, DO is one of 926 rheumatology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 88% of them.
- NPI issued2017 · 88% of these records are older, 10% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2017 · median 2003 among the 641 with a school on file
- Record last updated2024 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Los Angeles → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Ali Ashrafzadeh, MDLos Angeles, CA 900451962447060
- Gary Feldman, MDLos Angeles, CA 900451841220373
- Paul Lin, M.D.Los Angeles, CA 900451952614000
- Francesco Boin, M.D.West Hollywood, CA 900481417908229
- Elizabeth Frame, M.D.West Hollywood, CA 900481912094434
- Elayne Garber, MDLos Angeles, CA 900481508960840
- Jon Giles, M.D.Los Angeles, CA 900481679511810
- Arash Horizon, M.D.Los Angeles, CA 900481881694131
Common questions
What is Alexander Robert Peck, DO's NPI number?
Alexander Robert Peck, DO's National Provider Identifier (NPI) is 1588197545, issued on Apr 6, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Alexander Robert Peck, DO located?
The NPPES record lists a practice address at 5230 Pacific Concourse Dr Ste 100, Los Angeles, CA, 90045. Phone: (310) 297-9221. Providers update this record themselves, so call before visiting.
How can I verify Alexander Robert Peck, DO's license?
NPPES lists California license number 20A18318, 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 Alexander Robert Peck, DO prescribe under Medicare Part D?
In 2024, Alexander Robert Peck, DO had 861 Medicare Part D claims for 177 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
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.