Dr. Robert Sexton Kollen, MD
- Medicare services, 2024
- 28
- Medicare patients, 2024
- 40
- Part D claims, 2024
- 1,364
- Hospital affiliations
- 5
- Medical groups
- 4
- Practice address
- 745 Main Street, Cedarville, CA 96104
- Practice phone
- Call (916) 279-6115
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surprise Valley Medical Clinic
Rural Health Clinic - Hospital-Owned · Cedarville, California
Find Dr. Kollen's professional email, personal email and mobile number
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Dr. Robert Sexton Kollen is an emergency medicine physician in Cedarville, California
Dr. Kollen practices at Surprise Valley Medical Clinic in Cedarville, California.
Dr. Kollen's NPI, 1073554531, was assigned on June 8, 2006. Dr. Kollen graduated from University of Minnesota Medical School in 1969. Dr. Kollen holds California license C33600.
- NPI
- 1073554531NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476581307
- NPI enumeration date
- June 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (916) 279-6115
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 83
- Medical school graduation
- 1969
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Sexton Kollen practices at Surprise Valley Medical Clinic in Cedarville, California
Dr. Kollen's primary practice is Surprise Valley Medical Clinic, at 745 Main Street, Cedarville, CA 96104. The practice phone is (916) 279-6115.
- Surprise Valley Medical Clinic745 Main Street, Cedarville, CA 96104Phone(916) 279-6115
Source: Dmand AI Affiliation Data
Dr. Robert Sexton Kollen is affiliated with 7 sites of care and 4 medical groups
Dr. Kollen's primary practice is Surprise Valley Medical Clinic in Cedarville, California. Dr. Kollen is also affiliated with Surprise Valley Community Hospital. The medical group on file is Surprise Valley Community Hospital. Dmand AI also links Dr. Kollen to 4 more hospitals, 3 medical groups and 1 group practice or clinic, each named with a free account. Dr. Kollen's employer is on file too: a rural health clinic (rhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert Sexton Kollen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kollen practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Surprise Valley Medical Clinic | Available with a free account |
| +6 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Sexton Kollen is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Kollen's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Kollen is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Dr. Kollen
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Robert Sexton Kollen billed Medicare for 28 services in 2024
CMS data shows 28 Medicare services from Dr. Kollen across 2 procedure codes in 2024, for 40 Medicare patients. Medicare paid $2,775 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Kollen's Medicare services by type, 2020 to 2024
- 2020
- 2024
- Office and hospital visits
- 2020: 1732024: 2884%
- Tests and treatments
- 2020: 662024: 0100%
Dr. Kollen compared with the California median for emergency medicine physicians, 2024
- Dr. Kollen
- California median
- Medicare services
- 28vs 26589% below
- Medicare patients
- 40vs 24384% below
- Part D claims
- 917vs 6214.8 times
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Kollen's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Sexton Kollen treated 40 Medicare patients in 2024, average age 68
CMS counts 40 Medicare patients who saw Dr. Kollen in 2024. The largest group is 65 to 74, with 20 patients. 75% of them have high blood pressure, and 65% have high cholesterol. Their average risk score is 2.38, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Kollen's median patient age at 51, with 54% women.
Dr. Kollen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Kollen's Medicare patients by sex, 2024
- Women2050%
- Men2050%
Chronic conditions among Dr. Kollen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol65%
- Diabetes53%
- Arthritis43%
- Ischemic heart disease43%
- Chronic kidney disease40%
- Heart failure33%
- Anxiety28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kollen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert Sexton Kollen wrote 1,364 Medicare Part D claims in 2024
In 2024, Dr. Kollen wrote 1,364 Medicare Part D claims for 162 patients. 87% of them were for generic drugs. CMS names the drug for 917 of them, across 43 drugs with 11 or more claims each, at $33,911 in total drug cost. In 2023, CMS named 339 claims across 18 drugs.
Dr. Kollen's Part D claims by kind of drug, 2024
- Generic1,185 claims87%
- Brand-name161 claims12%
- Other18 claims1%
Dr. Kollen's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Kollen's Part D claims, 2024
- Opioids9%119 of 1,364 claims
- Antibiotics5%64 of 1,364 claims
- Antipsychotics, patients 65 and over2%21 of 1,364 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3392024: 917171%
Drugs named by CMS: 43 in 2024, 18 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Robert Sexton Kollen takes part in Medicare
Dr. Kollen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Robert Sexton Kollen graduated from University of Minnesota Medical School
Dr. Kollen graduated from University of Minnesota Medical School in 1969.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert Sexton Kollen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Robert Sexton Kollen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Robert Sexton Kollen's NPI number?
Dr. Robert Sexton Kollen's NPI number is 1073554531. It was assigned on June 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Sexton Kollen?
Dr. Robert Sexton Kollen is an emergency medicine physician in Cedarville, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Robert Sexton Kollen practice?
Dr. Kollen practices at 745 Main Street, Cedarville, CA 96104. Dr. Kollen's primary practice is Surprise Valley Medical Clinic in Cedarville, California. Dmand AI also links Dr. Kollen to 4 hospitals, 3 medical groups and 1 group practice or clinic.
What is Dr. Robert Sexton Kollen's office phone number?
The practice phone on file for Dr. Kollen is (916) 279-6115.
What is Dr. Robert Sexton Kollen's medical license number?
Dr. Kollen holds California license C33600.
Which hospitals is Dr. Robert Sexton Kollen affiliated with?
Dr. Kollen is affiliated with Surprise Valley Community Hospital. Dmand AI links Dr. Kollen to 4 more hospitals.
What medical group is Dr. Robert Sexton Kollen part of?
Dr. Kollen is linked to Surprise Valley Community Hospital. Dmand AI links Dr. Kollen to 3 more medical groups.
Does Dr. Robert Sexton Kollen accept Medicare?
Yes. CMS data shows Dr. Kollen billed Medicare for 28 services in 2024, and Dr. Kollen accepts Medicare assignment.
How many Medicare patients does Dr. Robert Sexton Kollen see?
CMS counts 40 Medicare patients who saw Dr. Kollen in 2024, with an average age of 68.
What services does Dr. Robert Sexton Kollen bill to Medicare?
In 2024, Dr. Kollen's most billed Medicare services were emergency department visit (99284) and emergency department visit (99285).
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Where did Dr. Robert Sexton Kollen go to medical school?
Dr. Kollen graduated from University of Minnesota Medical School in 1969.
What drugs does Dr. Robert Sexton Kollen prescribe most?
In 2024 Medicare Part D data, Dr. Kollen's most prescribed drugs by claims were Zolpidem Tartrate, Levothyroxine Sodium and Hydrocodone-Acetaminophen.
How long has Dr. Robert Sexton Kollen been practicing?
Dr. Kollen graduated from medical school in 1969, 57 years ago.
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