Maisie Orsillo, DO
NPI 1083233639 · Internal Medicine Physician · New Haven, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maisie Orsillo, DO is a Internal Medicine Physician provider in New Haven, CT (NPI 1083233639).
Provider details
- NPI number
- 1083233639
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 74929 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
6 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
124 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 | 51 | $80 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 38 | $51 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 35 | $121 |
Typical Medicare-allowed amounts for these services range $51–$121 (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 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 40 | 13 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 33 | — |
| Pantoprazole Sodium | 29 | — |
| Amlodipine Besylate | 25 | — |
| Duloxetine Hcl | 22 | — |
| Oxycodone Hcl | 22 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-04-14
- Last updated
- 2023-06-11
- Certified
- 2023-06-11
Frequently asked questions
- What is Maisie Orsillo's NPI number?
- Maisie Orsillo's National Provider Identifier (NPI) is 1083233639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maisie Orsillo's specialty?
- Maisie Orsillo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Maisie Orsillo located?
- Maisie Orsillo's practice location on file with NPPES is 20 York St, New Haven, CT 06510-3220.
- What is Maisie Orsillo's phone number?
- The practice phone number listed in the NPPES registry for Maisie Orsillo is (203) 688-4242.
- Does Maisie Orsillo accept Medicare?
- Maisie Orsillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maisie Orsillo's NPI active?
- Yes — Maisie Orsillo's NPI (1083233639) is active in the NPPES registry as of the last update on 2023-06-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.