DR. KUMIKO E TANAKA MD
NPI 1619396900
Obstetrics & Gynecology in Wellesley, MA
About Dr. Kumiko E Tanaka Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KUMIKO E TANAKA MD (NPI 1619396900) is an individual obstetrics & gynecology provider in Wellesley, Massachusetts, licensed in Massachusetts (286473) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS, is affiliated with Newton-wellesley Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Accepted Insurance
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. Kumiko E Tanaka 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
7Medicare enrollment records show Kumiko Tanaka reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Wellesley, MA 02481
- Reassigned Medicare billing, Massachusetts enrollment
- 12 clinicians in this Medicare group
Newton, MA 02462
- Reassigned Medicare billing, Massachusetts enrollment
- 992 clinicians in this Medicare group
Watertown, MA 02472
- Reassigned Medicare billing, Massachusetts enrollment
- 991 clinicians in this Medicare group
Brockton, MA 02301
- Reassigned Medicare billing, Massachusetts enrollment
- 409 clinicians in this Medicare group
Brockton, MA 02302
- Reassigned Medicare billing, Massachusetts enrollment
- Medicare enrollment name: Obhg Massachusetts - Direct PC
- 100 clinicians in this Medicare group
Providence, RI 02905
- Reassigned Medicare billing, Rhode Island enrollment
- 1,372 clinicians in this Medicare group
Springfield, MA 01199
- Reassigned Medicare billing, Massachusetts enrollment
- 1,537 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Newton-Wellesley Hospital
Acute Care Hospitals · Newton, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02481 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 18
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WELLESLEY, MA 02481
WELLESLEY HILLS, MA 02481
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 Kumiko Tanaka's NPI number?
The NPI number for Kumiko Tanaka is 1619396900. It was assigned to this individual provider in the NPPES registry on April 15, 2014.
Where is Kumiko Tanaka located?
Kumiko Tanaka practices at 30 Washington St, Wellesley, MA 02481. The listed phone number is (781) 263-9110.
What is Kumiko Tanaka's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Kumiko Tanaka enrolled in Medicare?
Yes. Kumiko Tanaka 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 Kumiko Tanaka's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kumiko Tanaka reassigns Medicare benefits to 7 organizations: About Women By Women A Professional Corporation (Wellesley, MA), Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA), Steward Medical Group, Inc (Watertown, MA), Signature Healthcare Medical Group Inc (Brockton, MA), Obhg Massachusetts - Direct, P.C. (Brockton, MA) and 2 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 Kumiko Tanaka's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kumiko Tanaka accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Kumiko Tanaka as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Kumiko Tanaka affiliated with any hospitals?
According to CMS data, Kumiko Tanaka is affiliated with Newton-Wellesley Hospital.
When was this NPI record last updated?
The NPPES record for Kumiko Tanaka was last updated on July 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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. Kumiko E Tanaka, MD · NPI 1619396900
Obstetrics & Gynecology physician in Wellesley, Massachusetts. Individual provider, active in the CMS NPPES registry since April 15, 2014.
## Identity
- **NPI:** 1619396900 (Entity type: Individual)
- **Enumerated:** April 15, 2014
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 286473 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 30 WASHINGTON ST, Wellesley, MA 02481-1929
- **Phone:** (781) 263-9110 · **Fax:** (781) 263-9125
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): About Women By Women A Professional Corporation (NPI 1609881564, Wellesley, MA); Mass General Brigham Medical Group Suburban Massachusetts Inc (NPI 1538191218, Newton, MA); Steward Medical Group, Inc (NPI 1629398219, Watertown, MA); Signature Healthcare Medical Group Inc (NPI 1508804949, Brockton, MA); Obhg Massachusetts - Direct, P.C. (NPI 1487229035, Brockton, MA); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Southern California Keck School Of Medicine, class of 2014
## Record status
- **NPPES last updated:** July 7, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1619396900) · Data from the CMS NPPES public registry.