JOANNA LOUISE SPENCER-SEGAL MD
NPI 1609161611
Internal Medicine - Endocrinology, Diabetes & Metabolism in Ann Arbor, MI
About Joanna Louise Spencer-segal Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOANNA LOUISE SPENCER-SEGAL MD (NPI 1609161611) is an individual endocrinology, diabetes & metabolism provider in Ann Arbor, Michigan, licensed in Michigan (4301098891) and active in the NPI registry since June 2011. She is enrolled in Medicare PECOS, is affiliated with University Of Michigan Health System, and is a graduate of Other (2011).
NPPES Registry Identity
Specialties & Licenses 3
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
Joanna Louise Spencer-segal 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
2Medicare enrollment records show Joanna Spencer-segal reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ann Arbor, MI 48109
- Reassigned Medicare billing, Michigan enrollment
- 2,377 clinicians in this Medicare group
New York, NY 10032
- Reassigned Medicare billing, New York enrollment
- 3,922 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.
University Of Michigan Health System
Acute Care Hospitals · Ann Arbor, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48109 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
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 Joanna Spencer-segal's NPI number?
The NPI number for Joanna Spencer-segal is 1609161611. It was assigned to this individual provider in the NPPES registry on June 17, 2011.
Where is Joanna Spencer-segal located?
Joanna Spencer-segal practices at 1500 East Medical Center Dr 3rd Floor Med Inn Rm C333, Ann Arbor, MI 48109. The listed phone number is (734) 763-9812.
What is Joanna Spencer-segal's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Joanna Spencer-segal enrolled in Medicare?
Yes. Joanna Spencer-segal 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 Joanna Spencer-segal's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joanna Spencer-segal reassigns Medicare benefits to 2 organizations: Regents Of The University Of Michigan (Ann Arbor, MI) and Trustees Of Columbia University In The City Of New York (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 Joanna Spencer-segal's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Joanna Spencer-segal accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Joanna Spencer-segal 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 Joanna Spencer-segal affiliated with any hospitals?
According to CMS data, Joanna Spencer-segal is affiliated with University Of Michigan Health System.
When was this NPI record last updated?
The NPPES record for Joanna Spencer-segal was last updated on January 24, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Joanna Louise Spencer-Segal, MD · NPI 1609161611
Endocrinology, Diabetes & Metabolism physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since June 17, 2011.
## Identity
- **NPI:** 1609161611 (Entity type: Individual)
- **Enumerated:** June 17, 2011
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** 4301098891 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 EAST MEDICAL CENTER DR, 3RD FLOOR MED INN RM C333, Ann Arbor, MI 48109-5832
- **Phone:** (734) 763-9812
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of Michigan (NPI 1003848144, Ann Arbor, MI); Trustees Of Columbia University In The City Of New York (NPI 1508266347, New York, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** January 24, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1609161611) · Data from the CMS NPPES public registry.