Geethan Sivananthan
NPI 1598907990 · Gastroenterology Physician · Union, NJ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Geethan Sivananthan is a Gastroenterology Physician provider in Union, NJ (NPI 1598907990).
Provider details
- NPI number
- 1598907990
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- 25MA09696600 (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
17 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
1,642 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 Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 609 | $85 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 308 | $141 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 185 | $140 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 172 | $101 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 94 | $159 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 238 | 79 |
| Omeprazole | 111 | 33 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 80 | 79 |
| Mesalamine | 65 | 12 |
| Esomeprazole Magnesium | 59 | 15 |
| Famotidine | 52 | 14 |
| Dexlansoprazolebrand: Dexlansoprazole Dr | 36 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$704 across 39 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
- 2009-03-31
- Last updated
- 2019-04-04
Frequently asked questions
- What is Geethan Sivananthan's NPI number?
- Geethan Sivananthan's National Provider Identifier (NPI) is 1598907990, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Geethan Sivananthan's specialty?
- Geethan Sivananthan is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Geethan Sivananthan located?
- Geethan Sivananthan's practice location on file with NPPES is 695 Chestnut St, Union, NJ 07083-7200.
- What is Geethan Sivananthan's phone number?
- The practice phone number listed in the NPPES registry for Geethan Sivananthan is (908) 688-6565.
- Does Geethan Sivananthan accept Medicare?
- Geethan Sivananthan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Geethan Sivananthan's NPI active?
- Yes — Geethan Sivananthan's NPI (1598907990) is active in the NPPES registry as of the last update on 2019-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.