Grant Landon, DO
NPI 1255956975 · Family Medicine Physician · Mason City, IA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grant Landon, DO is a Family Medicine Physician provider in Mason City, IA (NPI 1255956975).
Provider details
- NPI number
- 1255956975
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- R-11944 (IA)
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
6 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 · 79 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 156 | 84 |
| Atorvastatin Calcium | 118 | 62 |
| Levothyroxine Sodium | 117 | 58 |
| Amlodipine Besylate | 115 | 61 |
| Omeprazole | 96 | 42 |
| Metoprolol Succinate | 87 | 57 |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-06-09
- Last updated
- 2023-06-30
- Certified
- 2023-06-30
Frequently asked questions
- What is Grant Landon's NPI number?
- Grant Landon's National Provider Identifier (NPI) is 1255956975, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grant Landon's specialty?
- Grant Landon is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Grant Landon located?
- Grant Landon's practice location on file with NPPES is 1010 4th St Sw Ste 340, Mason City, IA 50401-2856.
- What is Grant Landon's phone number?
- The practice phone number listed in the NPPES registry for Grant Landon is (641) 428-7766.
- Does Grant Landon accept Medicare?
- Grant Landon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grant Landon's NPI active?
- Yes — Grant Landon's NPI (1255956975) is active in the NPPES registry as of the last update on 2023-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.