John O'Brien, MD.
NPI 1013123579 · Family Medicine Physician · Cazenoviz, NY
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John O'Brien, MD. is a Family Medicine Physician provider in Cazenoviz, NY (NPI 1013123579).
Provider details
- NPI number
- 1013123579
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD.
- Sex
- Male
- Sole proprietor
- No
- License
- 243461 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
673 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 192 | $122 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 70 | $6 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 60 | $86 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 52 | $62 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 43 | $74 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 94 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 273 | 93 |
| Losartan Potassium | 140 | 46 |
| Lisinopril | 135 | 44 |
| Amlodipine Besylate | 118 | 45 |
| Levothyroxine Sodium | 113 | 42 |
| Omeprazole | 91 | 34 |
| Alprazolam |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-14
- Last updated
- 2014-01-23
Frequently asked questions
- What is John O'Brien's NPI number?
- John O'Brien's National Provider Identifier (NPI) is 1013123579, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John O'Brien's specialty?
- John O'Brien is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John O'Brien located?
- John O'Brien's practice location on file with NPPES is 132 1/2 Albany Street, Cazenoviz, NY 13035.
- What is John O'Brien's phone number?
- The practice phone number listed in the NPPES registry for John O'Brien is (315) 655-8171.
- Does John O'Brien accept Medicare?
- John O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John O'Brien's NPI active?
- Yes — John O'Brien's NPI (1013123579) is active in the NPPES registry as of the last update on 2014-01-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.