John Kazilionis, DO
NPI 1114941937 · Family Medicine Physician · South Portland, ME
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Kazilionis, DO is a Family Medicine Physician provider in South Portland, ME (NPI 1114941937).
Provider details
- NPI number
- 1114941937
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 917 (ME)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
281 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 104 | $74 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 86 | $122 |
| Residence Visit for Established Patient With Straightforward Medical Decision Making, Per Day, If Using Time, at Least 15 Minutes99347 | 75 | $44 |
| Residence Visit for Established Patient With High Level of Medical Decision Making, Per Day, If Using Time, at Least 60 Minutes99350 | 16 | $179 |
Typical Medicare-allowed amounts for these services range $44–$179 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 58 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 143 | 23 |
| Lisinopril | 96 | 18 |
| Atorvastatin Calcium | 85 | 18 |
| Sertraline Hcl | 82 | 23 |
| Donepezil Hcl | 78 | 13 |
| Amlodipine Besylate | 77 | 16 |
| Apixabanbrand: Eliquis |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-26
- Last updated
- 2013-03-29
Frequently asked questions
- What is John Kazilionis's NPI number?
- John Kazilionis's National Provider Identifier (NPI) is 1114941937, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Kazilionis's specialty?
- John Kazilionis is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Kazilionis located?
- John Kazilionis's practice location on file with NPPES is 778 Main St, South Portland, ME 04106-5447.
- What is John Kazilionis's phone number?
- The practice phone number listed in the NPPES registry for John Kazilionis is (207) 775-7758.
- Does John Kazilionis accept Medicare?
- John Kazilionis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Kazilionis's NPI active?
- Yes — John Kazilionis's NPI (1114941937) is active in the NPPES registry as of the last update on 2013-03-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.