Robert Sexton Kollen, M.D
Emergency Medicine Physician · Colton, CA
Robert Sexton Kollen, M.D is an emergency medicine physician with a practice address in Colton, California, and NPI 1073554531, issued on Jun 8, 2006. Check the license (California C33600, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Sexton Kollen
- Credential
- M.D
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- C33600 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 N. Pepper Avenue, Colton, CA 92324
- Phone
- (909) 580-1400
- Enumerated
- Jun 8, 2006
- Record last updated
- Jul 13, 2026
- Medicare enrollment
- Enrolled (PECOS I20050801000906); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1969
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 400 N. Pepper Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christine Bernier, P.A-CPhysician Assistant1366482259
- Rodney Borger, M.DEmergency Medicine Physician1619917465
- Dennis Carden, D.O.Obstetrics & Gynecology Physician1366526170
- Maximillian Cruz, P.A-CPhysician Assistant1538102751
- Lawrence Gates, P.A-CPhysician Assistant1023059318
- Richard Hausman, D.O.Emergency Medicine Physician1922049113
Verify Robert Sexton Kollen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C33600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6.0 times the Medicare Part D claims of the average emergency medicine physician in 2024
1,364 Medicare Part D claims for 162 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 119 claims were for opioids.
Most prescribed
- Zolpidem Tartrate50 claims
- Levothyroxine Sodium41 claims
- Hydrocodone-Acetaminophen37 claims
- Lisinopril36 claims
- Atorvastatin Calcium34 claims
- Tamsulosin Hcl33 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): 94.6 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 2 group practices
- American Specialty Physicians Group IncColusa, CA
- Surprise Valley Health Care DistrictCedarville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Sexton Kollen among 7,751 emergency medicine physician records in California
Robert Sexton Kollen, M.D is one of 7,751 emergency medicine 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 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1969 · median 2011 among the 4,560 with a school on file
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
110 emergency medicine physician records list a practice address in Colton
They are 110 of the 2,459 NPPES records with a practice address in Colton, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Colton → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Rodney Borger, M.DColton, CA 923241619917465
- Richard Hausman, D.O.Colton, CA 923241922049113
- Ali Jamehdor, D.OColton, CA 923241528009008
- Eugene Kwong, M.DColton, CA 923241003857020
- Carol Lee, M.DColton, CA 923241043251143
- Pamela Lux, D.OColton, CA 923241427090323
- Thomas Minahan, D.OColton, CA 923241457394827
- Michael Neeki, DOColton, CA 923241982668430
Common questions
What is Robert Sexton Kollen, M.D's NPI number?
Robert Sexton Kollen, M.D's National Provider Identifier (NPI) is 1073554531, issued on Jun 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Sexton Kollen, M.D located?
The NPPES record lists a practice address at 400 N. Pepper Avenue, Colton, CA, 92324. Phone: (909) 580-1400. Providers update this record themselves, so call before visiting.
How can I verify Robert Sexton Kollen, M.D's license?
NPPES lists California license number C33600, 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 Robert Sexton Kollen, M.D prescribe under Medicare Part D?
In 2024, Robert Sexton Kollen, M.D had 1,364 Medicare Part D claims for 162 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Robert Sexton Kollen, M.D's MIPS final score?
The 2023 MIPS final score is 94.6 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.