Dr. Erik W. Koster, DO
- Medicare services, 2024
- 670
- Medicare patients, 2024
- 226
- Part D claims, 2024
- 218
- MIPS score, 2024
- 86
- Hospital affiliations
- 2
- Practice address
- 2350 Meadows Blvd, Castle Rock, CO 80109
- Practice phone
- Call (720) 455-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Koster's professional email, personal email and mobile number
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Dr. Erik W. Koster is a hospitalist in Castle Rock, Colorado
Dr. Koster practices at AdventHealth Castle Rock in Castle Rock, Colorado, part of AdventHealth.
Dr. Koster's NPI, 1902843626, was assigned on June 1, 2006. Dr. Koster graduated from R Franklin University of Med & Sci/Chicago Medical School in 2003. Dr. Koster holds Colorado license DR.0043665.
- NPI
- 1902843626NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901818103
- NPI enumeration date
- June 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (720) 455-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Erik W. Koster practices at AdventHealth Castle Rock in Castle Rock, Colorado
Dr. Koster's primary practice is AdventHealth Castle Rock, at 2350 Meadows Blvd, Castle Rock, CO 80109 in Douglas County. The practice phone is (720) 455-5000.
- AdventHealth Castle Rock2350 Meadows Blvd, Castle Rock, CO 80109 · Douglas CountyPhone(720) 455-5000
Source: Dmand AI Affiliation Data
Dr. Erik W. Koster is affiliated with 2 sites of care and 2 medical groups
Dr. Koster's primary practice is AdventHealth Castle Rock in Castle Rock, Colorado, part of AdventHealth. Dr. Koster is also affiliated with CommonSpirit - Penrose Hospital. The medical group on file is AdventHealth Transplant Institute North Billings. Dmand AI also links Dr. Koster to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Erik W. Koster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Koster practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| AdventHealth Castle Rock | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Erik W. Koster is one of 758 hospitalists in Colorado
Hospitalist is Dr. Koster's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Koster is licensed in Colorado.
Specialties and state licenses
- Hospitalist, ColoradoPrimary
Hospitalists near Dr. Koster
Counts of hospitalists 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. Erik W. Koster billed Medicare for 670 services in 2024
CMS data shows 670 Medicare services from Dr. Koster across 6 procedure codes in 2024, for 226 Medicare patients. Medicare paid $63,356 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Koster's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6312024: 6706%
Dr. Koster compared with the Colorado median for hospitalists, 2024
- Dr. Koster
- Colorado median
- Medicare services
- 670vs 2842.4 times
- Medicare patients
- 226vs 16041% above
- Part D claims
- 76vs 4185% above
Medians across 646 hospitalists in Colorado with Dmand AI profiles that report each measure.
Dr. Koster'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Koster and other hospitalists in Colorado.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Erik W. Koster treated 226 Medicare patients in 2024, average age 77
CMS counts 226 Medicare patients who saw Dr. Koster in 2024. The largest group is 75 to 84, with 94 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 1.92, 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. Koster's median patient age at 74, with 56% women.
Dr. Koster's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Koster's Medicare patients by sex, 2024
- Women12455%
- Men10245%
Chronic conditions among Dr. Koster's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis64%
- Ischemic heart disease47%
- Anxiety45%
- Chronic kidney disease42%
- Heart failure38%
- COPD37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Koster's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Erik W. Koster wrote 218 Medicare Part D claims in 2024
In 2024, Dr. Koster wrote 218 Medicare Part D claims for 117 patients. 87% of them were for generic drugs. CMS names the drug for 76 of them, across 5 drugs with 11 or more claims each, at $7,635 in total drug cost. In 2023, CMS named 38 claims across 3 drugs.
Dr. Koster's Part D claims by kind of drug, 2024
- Generic189 claims87%
- Brand-name29 claims13%
Dr. Koster'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. Koster's Part D claims, 2024
- Antibiotics27%59 of 218 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: 382024: 76100%
Drugs named by CMS: 5 in 2024, 3 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
Dr. Erik W. Koster scored 86 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. Koster for performance year 2024, reported as part of a group. Dr. Koster accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Koster's MIPS scores, performance year 2024
- 86of 100Final score
- 78.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Erik W. Koster graduated from R Franklin University of Med & Sci/Chicago Medical School
Dr. Koster graduated from R Franklin University of Med & Sci/Chicago Medical School in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Erik W. Koster'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)Clinician Public Reporting: Overall MIPS Performance (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. Erik W. Koster
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. Erik W. Koster's NPI number?
Dr. Erik W. Koster's NPI number is 1902843626. It was assigned on June 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Erik W. Koster?
Dr. Erik W. Koster is a hospitalist in Castle Rock, Colorado. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Erik W. Koster practice?
Dr. Koster practices at 2350 Meadows Blvd, Castle Rock, CO 80109. Dr. Koster's primary practice is AdventHealth Castle Rock in Castle Rock, Colorado, part of AdventHealth. Dmand AI also links Dr. Koster to 1 medical group.
What is Dr. Erik W. Koster's office phone number?
The practice phone on file for Dr. Koster is (720) 455-5000.
What is Dr. Erik W. Koster's medical license number?
Dr. Koster holds Colorado license DR.0043665.
Which hospitals is Dr. Erik W. Koster affiliated with?
Dr. Koster practices at AdventHealth Castle Rock in Castle Rock, Colorado. Dr. Koster is also affiliated with CommonSpirit - Penrose Hospital.
What medical group is Dr. Erik W. Koster part of?
Dr. Koster is linked to AdventHealth Transplant Institute North Billings. Dmand AI links Dr. Koster to 1 more medical group.
Does Dr. Erik W. Koster accept Medicare?
Yes. CMS data shows Dr. Koster billed Medicare for 670 services in 2024, and Dr. Koster accepts Medicare assignment.
What is Dr. Erik W. Koster's MIPS score?
Dr. Koster's MIPS final score for performance year 2024 is 86 out of 100, reported as part of a group.
How many Medicare patients does Dr. Erik W. Koster see?
CMS counts 226 Medicare patients who saw Dr. Koster in 2024, with an average age of 77.
Show 4 more questionsShow fewer questions
What services does Dr. Erik W. Koster bill to Medicare?
In 2024, Dr. Koster's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99223).
Where did Dr. Erik W. Koster go to medical school?
Dr. Koster graduated from R Franklin University of Med & Sci/Chicago Medical School in 2003.
What drugs does Dr. Erik W. Koster prescribe most?
In 2024 Medicare Part D data, Dr. Koster's most prescribed drugs by claims were Prednisone, Amoxicillin-Clavulanate Potass and Cefpodoxime Proxetil.
How long has Dr. Erik W. Koster been practicing?
Dr. Koster graduated from medical school in 2003, 23 years ago.
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