Erik Finlayson, M.D.
NPI 1942470893 · Internal Medicine Physician · Mission Viejo, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erik Finlayson, M.D. is a Internal Medicine Physician provider in Mission Viejo, CA (NPI 1942470893).
Provider details
- NPI number
- 1942470893
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A101340 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
808 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 331 | $81 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 198 | $119 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 121 | $135 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 74 | $122 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 50 | $51 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 34 | 20 |
| Atorvastatin Calcium | 22 | 14 |
| Amlodipine Besylate | 21 | 15 |
| Pantoprazole Sodium | 20 | 13 |
| Levofloxacin | 17 | 17 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 15 | 15 |
| Clopidogrel Bisulfate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$27 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 27700 Medical Center RdMission Viejo, CA 92691-6426Phone: (949) 364-6000Fax: (949) 309-6412
Registry dates
- Enumerated
- 2008-03-06
- Last updated
- 2021-10-22
- Certified
- 2021-10-22
Frequently asked questions
- What is Erik Finlayson's NPI number?
- Erik Finlayson's National Provider Identifier (NPI) is 1942470893, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erik Finlayson's specialty?
- Erik Finlayson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Erik Finlayson located?
- Erik Finlayson's practice location on file with NPPES is 26732 Crown Valley Pkwy Ste 170, Mission Viejo, CA 92691-6337.
- What is Erik Finlayson's phone number?
- The practice phone number listed in the NPPES registry for Erik Finlayson is (949) 365-2444.
- Does Erik Finlayson accept Medicare?
- Erik Finlayson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erik Finlayson's NPI active?
- Yes — Erik Finlayson's NPI (1942470893) is active in the NPPES registry as of the last update on 2021-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.