Quick answers
- Does Rehan Siddiqui accept Medicare assignment?
- Yes. Medicare's clinician data says Rehan Siddiqui accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Rehan Siddiqui see?
- In 2024, CMS data shows 58 Original Medicare patients and 251 services for Rehan Siddiqui. This counts Original Medicare only and measures volume, not quality.
- What is Rehan Siddiqui's NPI number?
- 1871736397. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Rehan Siddiqui, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 58 |
|---|---|
| Services billed to Medicare | 251 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 56 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)195 services
- Psychiatric diagnostic evaluation with medical services (90792)44 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Anxiety75%
- High blood pressure72%
- High cholesterol69%
- Depression66%
- Diabetes45%
- Arthritis24%
Hospitals where Rehan Siddiqui works
Medicare's Facility Affiliation Data lists Rehan Siddiqui at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Clara Maass Medical CenterBelleville, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 310009
- St Joseph's University Medical Center IncPaterson, NJ · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 310019
Practice locations
Addresses where Rehan Siddiqui is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Clara Maass DrBelleville, NJ 07109 (973) 450‑2111
Group practices
Medicare enrollment lists Rehan Siddiqui as a member of this group (CMS data updated October 2, 2026).
- Barnabas Health Medical Group, PC262 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Belleville
Clinicians with the same Medicare primary specialty in Belleville, NJ — not a recommendation.
Other clinicians in Barnabas Health Medical Group, PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2009 (17 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871736397 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians