Rachel M. Koster, PA-C
- Part D claims, 2024
- 6,682
- Industry payments
- $803
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 2255 E Mossy Oaks Rd, Spring, TX 77389
- Practice phone
- Call (281) 440-5300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
David P Ellent
Spring, Texas
Find Rachel Koster's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Rachel M. Koster is a physician assistant in Spring, Texas
Rachel Koster practices at David P Ellent in Spring, Texas.
Rachel Koster's NPI, 1437469830, was assigned on October 19, 2010. Rachel Koster holds Idaho license PA-867.
- NPI
- 1437469830NPI Registry (opens in a new tab)
- NPI enumeration date
- October 19, 2010
- NPI status
- Active
- Practice phone
- (281) 440-5300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Rachel M. Koster practices at David P Ellent in Spring, Texas
Rachel Koster's primary practice is David P Ellent, at 2255 E Mossy Oaks Rd, Spring, TX 77389 in Harris County. The practice phone is (281) 440-5300.
- David P Ellent2255 E Mossy Oaks Rd, Spring, TX 77389 · Harris CountyPhone(281) 440-5300
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Rachel M. Koster is affiliated with 2 sites of care and 1 medical group
Rachel Koster's primary practice is David P Ellent in Spring, Texas. The medical group on file is Genesis Medical Group. Dmand AI also links Rachel Koster to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Rachel M. Koster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Rachel Koster practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| David P Ellent | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Rachel M. Koster is one of 8,663 physician assistants in Texas
Physician assistant is Rachel Koster's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Rachel Koster is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Rachel Koster is licensed in Idaho.
Specialties and state licenses
- Physician assistant, IdahoPrimary
Physician assistants near Rachel Koster
Counts of physician assistants 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
Rachel M. Koster's patients have a median age of 69
Across all payers, Dmand AI patient panel data puts Rachel Koster's median patient age at 69, with 71% women.
Rachel 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 69
Patient panel by sex, all payers
- Women71%
- Men28%
Source: Dmand AI Patient Panel Data
Rachel M. Koster wrote 6,682 Medicare Part D claims in 2024
In 2024, Rachel Koster wrote 6,682 Medicare Part D claims for 537 patients. 84% of them were for generic drugs. CMS names the drug for 6,000 of them, across 126 drugs with 11 or more claims each, at $695,357 in total drug cost.
Rachel Koster's Part D claims by kind of drug, 2024
- Generic5,621 claims84%
- Brand-name1,034 claims15%
- Other27 claims0%
Rachel 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 Rachel Koster's Part D claims, 2024
- Opioids1%54 of 6,682 claims
- Antibiotics3%211 of 6,682 claims
- Antipsychotics, patients 65 and over0%14 of 6,682 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
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Rachel M. Koster received $803 in industry payments from 2024 to 2025
CMS Open Payments shows 38 general payments to Rachel Koster from 13 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $228.
General payments to Rachel Koster by program year, 2024 to 2025
Companies that paid Rachel Koster the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Rachel M. Koster is board certified in certified physician assistant
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for Rachel M. 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Industry payments | Open Payments (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 Rachel M. 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 Rachel M. Koster's NPI number?
Rachel M. Koster's NPI number is 1437469830. It was assigned on October 19, 2010, and it is active in the NPI Registry.
What does Rachel M. Koster specialize in?
Rachel M. Koster is a physician assistant in Spring, Texas. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Rachel M. Koster practice?
Rachel Koster practices at 2255 E Mossy Oaks Rd, Spring, TX 77389. Rachel Koster's primary practice is David P Ellent in Spring, Texas. Dmand AI also links Rachel Koster to 1 group practice or clinic.
What is Rachel M. Koster's office phone number?
The practice phone on file for Rachel Koster is (281) 440-5300.
What is Rachel M. Koster's medical license number?
Rachel Koster holds Idaho license PA-867.
What medical group is Rachel M. Koster part of?
Rachel Koster is linked to Genesis Medical Group.
Is Rachel M. Koster board certified?
Yes. Rachel Koster is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
What drugs does Rachel M. Koster prescribe most?
In 2024 Medicare Part D data, Rachel Koster's most prescribed drugs by claims were Levothyroxine Sodium, Atorvastatin Calcium and Amlodipine Besylate.
Has Rachel M. Koster received payments from drug or device companies?
CMS Open Payments shows $803 in general payments to Rachel Koster from 13 companies from 2024 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Rachel M. Koster been practicing?
Rachel Koster graduated from medical school in 2010, 16 years ago.
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