Joanna Louise Spencer-Segal, MD
Endocrinology, Diabetes & Metabolism Physician · Ann Arbor, MI
Joanna Louise Spencer-Segal, MD is an endocrinology, diabetes & metabolism physician with a practice address in Ann Arbor, Michigan, and NPI 1609161611, issued on Jun 17, 2011. Check the license (Michigan 4301098891, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Joanna Louise Spencer-Segal
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 4301098891 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1500 East Medical Center Dr, Ann Arbor, MI 48109
- Phone
- (734) 763-9812
- Enumerated
- Jun 17, 2011
- Record last updated
- Jan 24, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20161205001408); accepts Medicare assignment
- Medical or professional school
- Js Weill Medical College, Cornell University, 2011
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 270 in Michigan → Look up another NPI →
Also registered at 1500 East Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joanna Louise Spencer-Segal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301098891Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
701 Medicare Part D claims for 108 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D.
Most prescribed
- Hydrocortisone211 claims
- Levothyroxine Sodium179 claims
- Cabergoline66 claims
- Somatuline Depot32 claims
- Isturisa25 claims
- Testosterone20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $4,504.50
6 payments; by number, the most common kind was food and beverage; the largest payer was Corcept Therapeutics. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Regents OF The University OF MichiganAnn Arbor, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joanna Louise Spencer-Segal among 270 endocrinology, diabetes & metabolism physician records in Michigan
Joanna Louise Spencer-Segal, MD is one of 270 endocrinology, diabetes & metabolism physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 64% of them.
- NPI issued2011 · 64% of these records are older, 31% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2011 · median 2004 among the 195 with a school on file
- Record last updated2017 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Michigan
There are 270 endocrinology, diabetes & metabolism physician records in Michigan.
All 270 in Michigan → Every provider in Ann Arbor → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Ariel Barkan, MDAnn Arbor, MI 481091891877320
- Gary Hammer, MDAnn Arbor, MI 481091871676791
- William Herman, MDAnn Arbor, MI 481091316020233
- Shafaq Khairi, M.D.Ann Arbor, MI 481091225284334
- Ronald Koenig, MDAnn Arbor, MI 481091982787818
- Julia MeirelesAnn Arbor, MI 481091760052773
- Richard Mortensen, MDAnn Arbor, MI 481091194962530
- Mary TownsendAnn Arbor, MI 481091891431946
Common questions
What is Joanna Louise Spencer-Segal, MD's NPI number?
Joanna Louise Spencer-Segal, MD's National Provider Identifier (NPI) is 1609161611, issued on Jun 17, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Joanna Louise Spencer-Segal, MD located?
The NPPES record lists a practice address at 1500 East Medical Center Dr, Ann Arbor, MI, 48109. Phone: (734) 763-9812. Providers update this record themselves, so call before visiting.
How can I verify Joanna Louise Spencer-Segal, MD's license?
NPPES lists Michigan license number 4301098891, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joanna Louise Spencer-Segal, MD prescribe under Medicare Part D?
In 2024, Joanna Louise Spencer-Segal, MD had 701 Medicare Part D claims for 108 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.