Ranju Singh, MD
Internal Medicine · Rheumatology (CMS) · Princeton, NJ
At a glance
419 N Harrison St, Princeton, NJ 08540-3594
NPPES record updated Apr 25, 2023. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
419 N Harrison StPrinceton, NJ 08540-3594
Additional reported practice locations
3 Liberty StPlainsboro, NJ 085361816
Phone: 6099249300 2 Research Way
Monroe, NJ 088316816
Phone: 6099249300 601 Ewing St
Suite A-8
Princeton, NJ 085402757
Phone: 6099216555
Fax: 6099245911
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 1991
- CMS specialties
- Internal Medicine · Rheumatology
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
Reported hospital affiliations
- Centrastate Medical Center Freehold, NJ
- Robert Wood Johnson University Hospital At Hamilton Hamilton, NJ
- University Medical Center Of Princeton At Plainsboro Plainsboro, NJ
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $185.11 |
| Education | $74.99 |
Reporting companies
| Company | Amount |
|---|---|
| JANSSEN BIOTECH, INC. | $212.59 |
| ABBVIE INC. | $31.71 |
| AMGEN INC. | $15.80 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Internal Medicine · Rheumatology (CMS)
- Taxonomy code
- 207RR0500X
- Enumeration date
- Jan 8, 2007
- Record updated
- Apr 25, 2023
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
207RR0500X · Primary
License reported: 25MAO7370700 NJ
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
419 N Harrison StPrinceton, NJ 08540-3594
- Phone
- (609) 924-9300
Mailing address
601 EWING STREET, A-8PRINCETON, NJ 085402754
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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