Joanna Spencer-Segal, MD
NPI 1609161611 · Endocrinology, Diabetes & Metabolism Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joanna Spencer-Segal, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Ann Arbor, MI (NPI 1609161611).
Provider details
- NPI number
- 1609161611
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301098891 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
64 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 33 | $98 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 31 | $16 |
Typical Medicare-allowed amounts for these services range $16–$98 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocortisone | 211 | 51 |
| Levothyroxine Sodium | 179 | 54 |
| Cabergoline | 66 | 17 |
| Lanreotide Acetatebrand: Somatuline Depot | 32 | — |
| Osilodrostat Phosphatebrand: Isturisa | 25 | — |
| Testosterone | 20 | — |
| Testosterone Cypionate | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,505 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-17
- Last updated
- 2017-01-24
Frequently asked questions
- What is Joanna Spencer-Segal's NPI number?
- Joanna Spencer-Segal's National Provider Identifier (NPI) is 1609161611, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanna Spencer-Segal's specialty?
- Joanna Spencer-Segal is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Joanna Spencer-Segal located?
- Joanna Spencer-Segal's practice location on file with NPPES is 1500 East Medical Center Dr, Ann Arbor, MI 48109-5832.
- What is Joanna Spencer-Segal's phone number?
- The practice phone number listed in the NPPES registry for Joanna Spencer-Segal is (734) 763-9812.
- Does Joanna Spencer-Segal accept Medicare?
- Joanna Spencer-Segal is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joanna Spencer-Segal's NPI active?
- Yes — Joanna Spencer-Segal's NPI (1609161611) is active in the NPPES registry as of the last update on 2017-01-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.