Jeffrey Marinshaw, MD
NPI 1831683820 · Internal Medicine Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jeffrey Marinshaw, MD is a Internal Medicine Physician provider in Ann Arbor, MI (NPI 1831683820).
Provider details
- NPI number
- 1831683820
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2021012134 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
460 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 210 | $112 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 188 | $75 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 27 | $166 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 23 | $109 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 12 | $78 |
Typical Medicare-allowed amounts for these services range $75–$166 (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.
Practice location
Mailing address
Additional practice locations (1)
- 1 Barnes Jewish Hospital PlzDiv Im HospitalistSaint Louis, MO 63110-1003Phone: (314) 362-1700Fax: (314) 362-9878
Registry dates
- Enumerated
- 2018-06-21
- Last updated
- 2025-08-05
- Certified
- 2025-08-05
Frequently asked questions
- What is Jeffrey Marinshaw's NPI number?
- Jeffrey Marinshaw's National Provider Identifier (NPI) is 1831683820, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jeffrey Marinshaw's specialty?
- Jeffrey Marinshaw is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jeffrey Marinshaw located?
- Jeffrey Marinshaw's practice location on file with NPPES is 1500 E Medical Center Dr, Ann Arbor, MI 48109-5000.
- What is Jeffrey Marinshaw's phone number?
- The practice phone number listed in the NPPES registry for Jeffrey Marinshaw is (734) 936-4000.
- Does Jeffrey Marinshaw accept Medicare?
- Jeffrey Marinshaw is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jeffrey Marinshaw's NPI active?
- Yes — Jeffrey Marinshaw's NPI (1831683820) is active in the NPPES registry as of the last update on 2025-08-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.