Robert Larson, DO
NPI 1902546963 · Internal Medicine Physician · Rockford, IL
Robert Larson, DO is a Internal Medicine Physician provider in Rockford, IL (NPI 1902546963).
Provider details
- NPI number
- 1902546963
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 036.179662 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 21 | — |
| Atorvastatin Calcium | 18 | — |
| Levothyroxine Sodium | 14 | — |
| Prednisone | 13 | — |
| Pantoprazole Sodium | 13 | 11 |
| Niacinbrand: Niacin Er | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-03-29
- Last updated
- 2026-06-05
- Certified
- 2026-06-05
Frequently asked questions
- What is Robert Larson's NPI number?
- Robert Larson's National Provider Identifier (NPI) is 1902546963, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Larson's specialty?
- Robert Larson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Larson located?
- Robert Larson's practice location on file with NPPES is 5666 E State St, Rockford, IL 61108-2425.
- What is Robert Larson's phone number?
- The practice phone number listed in the NPPES registry for Robert Larson is (815) 519-6087.
- Is Robert Larson's NPI active?
- Yes — Robert Larson's NPI (1902546963) is active in the NPPES registry as of the last update on 2026-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.