Karen Larson, M.D.
NPI 1245275593 · Internal Medicine Physician · Nashville, TN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Larson, M.D. is a Internal Medicine Physician provider in Nashville, TN (NPI 1245275593).
Provider details
- NPI number
- 1245275593
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 40823 (TN)
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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,926 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 244 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 198 | $10 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 168 | $16 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 145 | $13 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test85027 | 143 | $6 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 118 | $119 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 91 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 343 | 110 |
| Amlodipine Besylate | 320 | 90 |
| Levothyroxine Sodium | 299 | 78 |
| Atorvastatin Calcium | 235 | 69 |
| Omeprazole | 210 | 65 |
| Lisinopril | 208 | 59 |
| Metoprolol Succinate |
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
Registry dates
- Enumerated
- 2006-06-19
- Last updated
- 2018-07-18
Frequently asked questions
- What is Karen Larson's NPI number?
- Karen Larson's National Provider Identifier (NPI) is 1245275593, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Larson's specialty?
- Karen Larson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Larson located?
- Karen Larson's practice location on file with NPPES is 222 22nd Ave N, Nashville, TN 37203.
- What is Karen Larson's phone number?
- The practice phone number listed in the NPPES registry for Karen Larson is (629) 255-2141.
- Does Karen Larson accept Medicare?
- Karen Larson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Larson's NPI active?
- Yes — Karen Larson's NPI (1245275593) is active in the NPPES registry as of the last update on 2018-07-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.