DR. SHAMANTHY RATNASINGAM M.D
NPI 1184076507
Hospitalist in Middletown, NY
About Dr. Shamanthy Ratnasingam M.d NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SHAMANTHY RATNASINGAM M.D (NPI 1184076507) is an individual hospitalist provider in Middletown, New York, licensed in New York (299495) and active in the NPI registry since July 2016. She is enrolled in Medicare PECOS, is affiliated with Peconic Bay Medical Center, and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Shamanthy Ratnasingam M.d is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
8Medicare enrollment records show Shamanthy Ratnasingam reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Middletown, NY 10941
- Reassigned Medicare billing, New York enrollment
- 434 clinicians in this Medicare group
Astoria, NY 11102
- Reassigned Medicare billing, New York enrollment
- 207 clinicians in this Medicare group
Smithtown, NY 11787
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Southwest Suffolk Medical PC
- 348 clinicians in this Medicare group
Riverhead, NY 11901
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Central Suffolk Hospital
- 134 clinicians in this Medicare group
Sayre, PA 18840
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Guthrie Medical Group PC
- 798 clinicians in this Medicare group
Ithaca, NY 14850
- Reassigned Medicare billing, New York enrollment
- 328 clinicians in this Medicare group
Hornell, NY 14843
- Reassigned Medicare billing, New York enrollment
- 436 clinicians in this Medicare group
Dansville, NY 14437
- Reassigned Medicare billing, New York enrollment
- 275 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Peconic Bay Medical Center
Acute Care Hospitals · Riverhead, NYSt Anthony Community Hospital
Acute Care Hospitals · Warwick, NYNicholas H Noyes Memorial Hospital
Acute Care Hospitals · Dansville, NYGood Samaritan Hospital Medical Center
Acute Care Hospitals · West Islip, NYCayuga Medical Center At Ithaca
Acute Care Hospitals · Ithaca, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10941 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 5
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MIDDLETOWN, NY 10941
MIDDLETOWN, NY 10941
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Shamanthy Ratnasingam's NPI number?
The NPI number for Shamanthy Ratnasingam is 1184076507. It was assigned to this individual provider in the NPPES registry on July 9, 2016.
Where is Shamanthy Ratnasingam located?
Shamanthy Ratnasingam practices at 155 Crystal Run Rd, Middletown, NY 10941. The listed phone number is (845) 703-6999.
What is Shamanthy Ratnasingam's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Shamanthy Ratnasingam enrolled in Medicare?
Yes. Shamanthy Ratnasingam is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Shamanthy Ratnasingam's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Shamanthy Ratnasingam reassigns Medicare benefits to 8 organizations: Crystal Run Healthcare Physicians LLP (Middletown, NY), Icahn School Of Medicine At Mount Sinai (Astoria, NY), Southwest Suffolk Medical, P.C. (Smithtown, NY), Central Suffolk Hosptial (Riverhead, NY), Guthrie Medical Group, P.C. (Sayre, PA) and 3 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Shamanthy Ratnasingam's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Shamanthy Ratnasingam affiliated with any hospitals?
According to CMS data, Shamanthy Ratnasingam is affiliated with Peconic Bay Medical Center, St Anthony Community Hospital, Nicholas H Noyes Memorial Hospital, Good Samaritan Hospital Medical Center and Cayuga Medical Center At Ithaca.
When was this NPI record last updated?
The NPPES record for Shamanthy Ratnasingam was last updated on June 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Shamanthy Ratnasingam, M.D · NPI 1184076507
Hospitalist physician in Middletown, New York. Individual provider, active in the CMS NPPES registry since July 9, 2016.
## Identity
- **NPI:** 1184076507 (Entity type: Individual)
- **Enumerated:** July 9, 2016
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 299495 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 155 CRYSTAL RUN RD, Middletown, NY 10941-4028
- **Phone:** (845) 703-6999 · **Fax:** (845) 703-6297
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 8 organizations under Medicare reassignment (form CMS-855R): Crystal Run Healthcare Physicians LLP (NPI 1952376410, Middletown, NY); Icahn School Of Medicine At Mount Sinai (NPI 1477932275, Astoria, NY); Southwest Suffolk Medical, P.C. (NPI 1104096049, Smithtown, NY); Central Suffolk Hosptial (NPI 1841637741, Riverhead, NY); Guthrie Medical Group, P.C. (NPI 1245246644, Sayre, PA); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** June 21, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1184076507) · Data from the CMS NPPES public registry.