Emmanuel P. Katsaros, D.O.
Rheumatology Physician · Pomona, CA
Emmanuel P. Katsaros, D.O. is a rheumatology physician with a practice address in Pomona, California, and NPI 1144240961, issued on Jul 21, 2006. Check the license (California 20A6857, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Emmanuel P. Katsaros
- Credential
- D.O.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 20A6857 CA
Self-reported in NPPES; status is on the state search - Practice location
- 795 E 2ND St Ste 7, Pomona, CA 91766
- Phone
- (909) 865-2565
- Enumerated
- Jul 21, 2006
- Record last updated
- Jun 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (909) 865-2955
- Medicaid ID
- 00AX86570 CA
- Medicare enrollment
- Enrolled (PECOS I20040701000915); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 795 E 2ND St Ste 7
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Adriana BuenaventuraFoot & Ankle Surgery Podiatrist1194400739
Verify Emmanuel P. Katsaros in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A6857Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average rheumatology physician in 2024
468 Medicare Part D claims for 62 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Methotrexate73 claims
- Hydroxychloroquine Sulfate36 claims
- Prednisone36 claims
- Teriparatide23 claims
- Enbrel Sureclick18 claims
- Gabapentin15 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: $79.99
1 payment: education; the largest payer was Janssen Biotech, 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 2 group practices
- County OF RiversideMoreno Valley, CA
- Western University OF Health SciencesPomona, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Emmanuel P. Katsaros among 926 rheumatology physician records in California
Emmanuel P. Katsaros, D.O. 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1995 · median 2003 among the 641 with a school on file
- Record last updated2021 · 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 Pomona → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Jaffar Tremazi, MDPomona, CA 917671649248782
- Saru Sachdeva, M.D.Ontario, CA 917641841470630
- Huynh Tran, MD, DPDRosemead, CA 917701649566571
- Michael KwarkMonterey Park, CA 917541033798269
- Winnie Pang, M.D.Monterey Park, CA 917541962734798
- Ramachandran Srinivasan, M.D.Monterey Park, CA 917541689865503
- Li Yang, M.D.Monterey Park, CA 917541093918112
- Antony Hou, M.D.Upland, CA 917861114926367
Common questions
What is Emmanuel P. Katsaros, D.O.'s NPI number?
Emmanuel P. Katsaros, D.O.'s National Provider Identifier (NPI) is 1144240961, issued on Jul 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Emmanuel P. Katsaros, D.O. located?
The NPPES record lists a practice address at 795 E 2ND St Ste 7, Pomona, CA, 91766. Phone: (909) 865-2565. Providers update this record themselves, so call before visiting.
How can I verify Emmanuel P. Katsaros, D.O.'s license?
NPPES lists California license number 20A6857, 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 Emmanuel P. Katsaros, D.O. prescribe under Medicare Part D?
In 2024, Emmanuel P. Katsaros, D.O. had 468 Medicare Part D claims for 62 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.