John Rajapakse, M.D.
NPI 1639377914 · Internal Medicine Physician · Perth Amboy, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Rajapakse, M.D. is a Internal Medicine Physician provider in Perth Amboy, NJ (NPI 1639377914).
Provider details
- NPI number
- 1639377914
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 25MA08277300 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
681 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 208 | $104 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 204 | $89 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 157 | $133 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 62 | $20 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 31 | $142 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 173 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Alprazolam | 687 | 90 |
| Amlodipine Besylate | 589 | 86 |
| Hydrochlorothiazide | 553 | 87 |
| Atorvastatin Calcium | 452 | 73 |
| Omeprazole | 433 | 64 |
| Metformin Hcl | 374 | 53 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,034 across 62 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
- 2007-07-06
- Last updated
- 2013-11-26
Frequently asked questions
- What is John Rajapakse's NPI number?
- John Rajapakse's National Provider Identifier (NPI) is 1639377914, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Rajapakse's specialty?
- John Rajapakse is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Rajapakse located?
- John Rajapakse's practice location on file with NPPES is 495 New Brunswick Ave, Perth Amboy, NJ 08861-3653.
- What is John Rajapakse's phone number?
- The practice phone number listed in the NPPES registry for John Rajapakse is (732) 442-4422.
- Does John Rajapakse accept Medicare?
- John Rajapakse is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Rajapakse's NPI active?
- Yes — John Rajapakse's NPI (1639377914) is active in the NPPES registry as of the last update on 2013-11-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.