THERESA GRECO MD
NPI 1356318240
Internal Medicine in Stanford, CA
About Theresa Greco Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THERESA GRECO MD (NPI 1356318240) is an individual internal medicine provider in Stanford, California, licensed in Indiana (01055109A) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, is affiliated with Eskenazi Health, and maintains a secondary practice location in Indianapolis.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Theresa Greco 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
3Medicare enrollment records show Theresa Greco reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Indianapolis, IN 46254
- Reassigned Medicare billing, Indiana enrollment
- 564 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 386 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 737 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
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Eskenazi Health
Acute Care Hospitals · Indianapolis, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94305 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 7
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.
STANFORD, CA 94305
STANFORD, CA 94305
STANFORD, CA 94305
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 Theresa Greco's NPI number?
The NPI number for Theresa Greco is 1356318240. It was assigned to this individual provider in the NPPES registry on March 1, 2006.
Where is Theresa Greco located?
Theresa Greco practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.
What is Theresa Greco's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Theresa Greco enrolled in Medicare?
Yes. Theresa Greco 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 Theresa Greco's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Greco reassigns Medicare benefits to 3 organizations: The Health And Hospital Corporation Of Marion County (Indianapolis, IN), Eskenazi Medical Group Inc (Indianapolis, IN) and University Family Physicians, Inc. (Indianapolis, IN). 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 Theresa Greco's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Theresa Greco accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and CareSource list Theresa Greco 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 Theresa Greco affiliated with any hospitals?
According to CMS data, Theresa Greco is affiliated with Eskenazi Health.
When was this NPI record last updated?
The NPPES record for Theresa Greco was last updated on September 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Theresa Greco, MD · NPI 1356318240
Internal Medicine physician in Stanford, California. Individual provider, active in the CMS NPPES registry since March 1, 2006.
## Identity
- **NPI:** 1356318240 (Entity type: Individual)
- **Enumerated:** March 1, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 01055109A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 PASTEUR DR, Stanford, CA 94305-2200
- **Phone:** (650) 723-4000
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): The Health And Hospital Corporation Of Marion County (NPI 1841855897, Indianapolis, IN); Eskenazi Medical Group Inc (NPI 1730451063, Indianapolis, IN); University Family Physicians, Inc. (NPI 1043275787, Indianapolis, IN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Indiana University School Of Medicine, class of 1998
## Record status
- **NPPES last updated:** September 17, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1356318240) · Data from the CMS NPPES public registry.