Zachary Messina, D.O.
NPI 1336674498 · Critical Care Medicine (Internal Medicine) Physician · Philadelphia, PA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Messina, D.O. is a Critical Care Medicine (Internal Medicine) Physician provider in Philadelphia, PA (NPI 1336674498).
Provider details
- NPI number
- 1336674498
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- OS019882 (PA)
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 tenure28% of score
9 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
390 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 | 276 | $201 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 52 | $113 |
| Critical Care, Each Additional 30 Minutes99292 | 32 | $102 |
| Insertion of Non-Tunneled Central Venous Tube for Infusion (5 Years Or Older)36556 | 17 | $76 |
| Insertion of Artery Tube for Blood Sampling Or Infusion Through Skin36620 | 13 | $42 |
Typical Medicare-allowed amounts for these services range $42–$201 (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)
- 111 S Front StHarrisburg, PA 17101-2010Phone: (717) 231-8772
Registry dates
- Enumerated
- 2017-04-26
- Last updated
- 2024-03-13
- Certified
- 2024-03-13
Frequently asked questions
- What is Zachary Messina's NPI number?
- Zachary Messina's National Provider Identifier (NPI) is 1336674498, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Messina's specialty?
- Zachary Messina is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Messina located?
- Zachary Messina's practice location on file with NPPES is 10800 Knights Rd, Philadelphia, PA 19114-4200.
- What is Zachary Messina's phone number?
- The practice phone number listed in the NPPES registry for Zachary Messina is (215) 612-5161.
- Does Zachary Messina accept Medicare?
- Zachary Messina is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Messina's NPI active?
- Yes — Zachary Messina's NPI (1336674498) is active in the NPPES registry as of the last update on 2024-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.