Spencer Winters, M.D.
NPI 1225391840 · Critical Care Medicine (Internal Medicine) Physician · Kalamazoo, MI
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Spencer Winters, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in Kalamazoo, MI (NPI 1225391840).
Provider details
- NPI number
- 1225391840
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4301100707 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 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
43 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 43 | $209 |
Typical Medicare-allowed amounts for these services range $209–$209 (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)
- 3459 Fifth AveUpmc Montefiore, Nw628Pittsburgh, PA 15213Phone: (412) 648-3098
Registry dates
- Enumerated
- 2012-06-19
- Last updated
- 2023-11-27
- Certified
- 2020-09-25
Frequently asked questions
- What is Spencer Winters's NPI number?
- Spencer Winters's National Provider Identifier (NPI) is 1225391840, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Spencer Winters's specialty?
- Spencer Winters is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Spencer Winters located?
- Spencer Winters's practice location on file with NPPES is 601 John St Ste M-510, Kalamazoo, MI 49007-5341.
- What is Spencer Winters's phone number?
- The practice phone number listed in the NPPES registry for Spencer Winters is (269) 341-7762.
- Does Spencer Winters accept Medicare?
- Spencer Winters is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Spencer Winters's NPI active?
- Yes — Spencer Winters's NPI (1225391840) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.