Nicholas Karlson, MD
NPI 1588284327 · Internal Medicine Physician · Lexington, KY
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Karlson, MD is a Internal Medicine Physician provider in Lexington, KY (NPI 1588284327).
Provider details
- NPI number
- 1588284327
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 261287 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 24 | 11 |
| Apixabanbrand: Eliquis | 18 | — |
| Amlodipine Besylate | 14 | — |
| Carvedilol | 12 | — |
| Clopidogrel Bisulfatebrand: Clopidogrel | 11 | — |
| Losartan Potassium | 11 | — |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$200 across 5 records (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
Registry dates
- Enumerated
- 2020-04-22
- Last updated
- 2023-10-09
- Certified
- 2023-10-09
Frequently asked questions
- What is Nicholas Karlson's NPI number?
- Nicholas Karlson's National Provider Identifier (NPI) is 1588284327, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Karlson's specialty?
- Nicholas Karlson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Karlson located?
- Nicholas Karlson's practice location on file with NPPES is 800 Rose St, Lexington, KY 40536-4617.
- What is Nicholas Karlson's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Karlson is (859) 323-2636.
- Does Nicholas Karlson accept Medicare?
- Nicholas Karlson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Karlson's NPI active?
- Yes — Nicholas Karlson's NPI (1588284327) is active in the NPPES registry as of the last update on 2023-10-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.