Caroline Merrill, MD
NPI 1417440140 · Family Medicine Physician · Westminster, CO
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Caroline Merrill, MD is a Family Medicine Physician provider in Westminster, CO (NPI 1417440140).
Provider details
- NPI number
- 1417440140
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- DR.0065623 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
57 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 32 | $129 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 25 | $132 |
Typical Medicare-allowed amounts for these services range $129–$132 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 100 | 26 |
| Atorvastatin Calcium | 73 | 24 |
| Losartan Potassium | 47 | 16 |
| Lisinopril | 38 | 12 |
| Omeprazole | 34 | 11 |
| Metformin Hcl | 29 | — |
| Amlodipine Besylate |
Practice location
Mailing address
Additional practice locations (2)
- 4075 E 128th AveThornton, CO 80241-2201Phone: (303) 925-4210Fax: (303) 925-4212
- 2551 W 84th AveWestminster, CO 80031-3807Phone: (303) 430-5560Fax: (303) 430-5565
Registry dates
- Enumerated
- 2018-06-07
- Last updated
- 2025-06-11
- Certified
- 2025-06-11
Frequently asked questions
- What is Caroline Merrill's NPI number?
- Caroline Merrill's National Provider Identifier (NPI) is 1417440140, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Caroline Merrill's specialty?
- Caroline Merrill is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Caroline Merrill located?
- Caroline Merrill's practice location on file with NPPES is 14300 Orchard Pkwy, Westminster, CO 80023-9206.
- What is Caroline Merrill's phone number?
- The practice phone number listed in the NPPES registry for Caroline Merrill is (303) 430-5560.
- Does Caroline Merrill accept Medicare?
- Caroline Merrill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Caroline Merrill's NPI active?
- Yes — Caroline Merrill's NPI (1417440140) is active in the NPPES registry as of the last update on 2025-06-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.