KAREN MA MD
NPI 1306293246
Internal Medicine in New York, NY
About Karen Ma Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN MA MD (NPI 1306293246) is an individual internal medicine provider in New York, New York, licensed in New York (297439) and active in the NPI registry since May 2016. She is enrolled in Medicare PECOS and is a graduate of Columbia University College Of Physicians And Surgeons (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
Karen Ma Md 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
5Medicare enrollment records show Karen Ma reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10065
- Reassigned Medicare billing, New York enrollment
- 428 clinicians in this Medicare group
New York, NY 10065
- Reassigned Medicare billing, New York enrollment
- 315 clinicians in this Medicare group
New York, NY 10065
- Reassigned Medicare billing, New York enrollment
- 248 clinicians in this Medicare group
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 259 clinicians in this Medicare group
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 514 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 2
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10065 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.
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.
NEW YORK, NY 10065
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 Karen Ma's NPI number?
The NPI number for Karen Ma is 1306293246. It was assigned to this individual provider in the NPPES registry on May 20, 2016.
Where is Karen Ma located?
Karen Ma practices at 1275 York Ave, New York, NY 10065. The listed phone number is (212) 639-2000.
What is Karen Ma's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Karen Ma enrolled in Medicare?
Yes. Karen Ma 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 Karen Ma's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Ma reassigns Medicare benefits to 5 organizations: Memorial Hematology Lymphoma Group (New York, NY), Memorial Medical Consultation Group (New York, NY), Mskcc Clinical Practice Plan (New York, NY), Memorial Developmental Chemo Group (New York, NY) and Memorial Solid Tumor Group (New York, NY). 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 Karen Ma's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Karen Ma was last updated on December 8, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.
# Karen Ma, MD · NPI 1306293246
Internal Medicine physician in New York, New York. Individual provider, active in the CMS NPPES registry since May 20, 2016.
## Identity
- **NPI:** 1306293246 (Entity type: Individual)
- **Enumerated:** May 20, 2016
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 297439 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 1275 YORK AVE, New York, NY 10065-6007
- **Phone:** (212) 639-2000
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Memorial Hematology Lymphoma Group (NPI 1891766366, New York, NY); Memorial Medical Consultation Group (NPI 1053382523, New York, NY); Mskcc Clinical Practice Plan (NPI 1306096508, New York, NY); Memorial Developmental Chemo Group (NPI 1912978487, New York, NY); Memorial Solid Tumor Group (NPI 1699746172, New York, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Columbia University College Of Physicians And Surgeons, class of 2016
## Record status
- **NPPES last updated:** December 8, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1306293246) · Data from the CMS NPPES public registry.