John Ritzo, MD
NPI 1326780115 · Family Medicine Physician · Lewiston, ME
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Ritzo, MD is a Family Medicine Physician provider in Lewiston, ME (NPI 1326780115).
Provider details
- NPI number
- 1326780115
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- EC221068 (ME)
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 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 76 | 24 |
| Lisinopril | 67 | 18 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 57 | 18 |
| Metoprolol Succinate | 45 | 11 |
| Losartan Potassium | 36 | 12 |
| Amlodipine Besylate | 35 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-04-12
- Last updated
- 2022-04-12
- Certified
- 2022-04-12
Frequently asked questions
- What is John Ritzo's NPI number?
- John Ritzo's National Provider Identifier (NPI) is 1326780115, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Ritzo's specialty?
- John Ritzo is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Ritzo located?
- John Ritzo's practice location on file with NPPES is 76 High St, Lewiston, ME 04240-7649.
- What is John Ritzo's phone number?
- The practice phone number listed in the NPPES registry for John Ritzo is (207) 795-2800.
- Does John Ritzo accept Medicare?
- John Ritzo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Ritzo's NPI active?
- Yes — John Ritzo's NPI (1326780115) is active in the NPPES registry as of the last update on 2022-04-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.