Mary Shimkus, MD
NPI 1376123877 · Hospitalist Physician · New Haven, CT
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Shimkus, MD is a Hospitalist Physician provider in New Haven, CT (NPI 1376123877).
Provider details
- NPI number
- 1376123877
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
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
5 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
184 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 35 Minutes99232 | 135 | $80 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 23 | $51 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 13 | $83 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 13 | $117 |
Typical Medicare-allowed amounts for these services range $51–$117 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 36 | 15 |
| Fluticasone Propionate | 18 | — |
| Amlodipine Besylate | 18 | — |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 17 | — |
| Losartan Potassium | 16 | — |
| Apixabanbrand: Eliquis | 15 | — |
Practice location
Mailing address
Additional practice locations (1)
- 1 Gustave L Levy Pl # 1076New York, NY 10029-6504Phone: (212) 241-6694
Registry dates
- Enumerated
- 2021-04-09
- Last updated
- 2024-07-08
- Certified
- 2024-07-08
Frequently asked questions
- What is Mary Shimkus's NPI number?
- Mary Shimkus's National Provider Identifier (NPI) is 1376123877, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Shimkus's specialty?
- Mary Shimkus is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Shimkus located?
- Mary Shimkus's practice location on file with NPPES is 20 York St, New Haven, CT 06510-3220.
- What is Mary Shimkus's phone number?
- The practice phone number listed in the NPPES registry for Mary Shimkus is (203) 688-4242.
- Does Mary Shimkus accept Medicare?
- Mary Shimkus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Shimkus's NPI active?
- Yes — Mary Shimkus's NPI (1376123877) is active in the NPPES registry as of the last update on 2024-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.