Santiago Wer Arrivillaga, MD
NPI 1083049282 · Internal Medicine Physician · Cedar Knolls, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Santiago Wer Arrivillaga, MD is a Internal Medicine Physician provider in Cedar Knolls, NJ (NPI 1083049282).
Provider details
- NPI number
- 1083049282
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
934 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 | 344 | $139 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 129 | $142 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 77 | $18 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 71 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 53 | $10 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 180 | 65 |
| Amlodipine Besylate | 137 | 52 |
| Levothyroxine Sodium | 71 | 23 |
| Rosuvastatin Calcium | 63 | 22 |
| Lisinopril | 57 | 19 |
| Losartan Potassium | 49 | 17 |
| Celecoxib | 39 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-09-06
- Last updated
- 2022-09-29
- Certified
- 2022-09-29
Frequently asked questions
- What is Santiago Wer Arrivillaga's NPI number?
- Santiago Wer Arrivillaga's National Provider Identifier (NPI) is 1083049282, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Santiago Wer Arrivillaga's specialty?
- Santiago Wer Arrivillaga is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Santiago Wer Arrivillaga located?
- Santiago Wer Arrivillaga's practice location on file with NPPES is 160 E Hanover Ave, Cedar Knolls, NJ 07927-2000.
- What is Santiago Wer Arrivillaga's phone number?
- The practice phone number listed in the NPPES registry for Santiago Wer Arrivillaga is (973) 605-5090.
- Does Santiago Wer Arrivillaga accept Medicare?
- Santiago Wer Arrivillaga is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Santiago Wer Arrivillaga's NPI active?
- Yes — Santiago Wer Arrivillaga's NPI (1083049282) is active in the NPPES registry as of the last update on 2022-09-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.