George Isajiw, M.D.
NPI 1861509135 · Internal Medicine Physician · Lansdowne, PA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
George Isajiw, M.D. is a Internal Medicine Physician provider in Lansdowne, PA (NPI 1861509135).
Provider details
- NPI number
- 1861509135
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD012611E (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Nursing & Custodial Care Facilities
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
638 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 365 | $93 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 206 | $132 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 33 | $58 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 21 | $15 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 13 | $15 |
Typical Medicare-allowed amounts for these services range $15–$132 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 109 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Telmisartan | 172 | 41 |
| Rosuvastatin Calcium | 166 | 42 |
| Hydrochlorothiazide | 135 | 31 |
| Famotidine | 131 | 46 |
| Atorvastatin Calcium | 124 | 32 |
| Levothyroxine Sodium | 117 | 28 |
| Pantoprazole Sodium | 108 | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$536 across 22 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-24
- Last updated
- 2013-10-31
Frequently asked questions
- What is George Isajiw's NPI number?
- George Isajiw's National Provider Identifier (NPI) is 1861509135, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is George Isajiw's specialty?
- George Isajiw is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is George Isajiw located?
- George Isajiw's practice location on file with NPPES is 23 N Lansdowne Ave, Lansdowne, PA 19050-2205.
- What is George Isajiw's phone number?
- The practice phone number listed in the NPPES registry for George Isajiw is (610) 626-4397.
- Does George Isajiw accept Medicare?
- George Isajiw is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is George Isajiw's NPI active?
- Yes — George Isajiw's NPI (1861509135) is active in the NPPES registry as of the last update on 2013-10-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.