John Zwiener, MD
NPI 1518038496 · Clinical Pathology/Laboratory Medicine Physician · Carlsbad, NM
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Zwiener, MD is a Clinical Pathology/Laboratory Medicine Physician provider in Carlsbad, NM (NPI 1518038496).
Provider details
- NPI number
- 1518038496
- Entity type
- Individual
- Primary specialty
- Clinical Pathology/Laboratory Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 90-132 (NM)
Specialties & taxonomies
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
19 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
920 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 648 | $34 |
| Special Stained Specimen Slides to Identify Organisms Including Interpretation and Report88312 | 176 | $24 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 38 | $10 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 25 | $74 |
| Special Stained Specimen Slides to Examine Tissue Including Interpretation and Report88313 | 18 | $11 |
| Preparation of Tissue for Examination By Removing Any Calcium Present88311 | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-13
- Last updated
- 2025-06-11
- Certified
- 2025-06-11
Frequently asked questions
- What is John Zwiener's NPI number?
- John Zwiener's National Provider Identifier (NPI) is 1518038496, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Zwiener's specialty?
- John Zwiener is listed in the NPPES registry with a primary specialty of Clinical Pathology/Laboratory Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Zwiener located?
- John Zwiener's practice location on file with NPPES is 2430 W Pierce St, Carlsbad, NM 88220-3553.
- What is John Zwiener's phone number?
- The practice phone number listed in the NPPES registry for John Zwiener is (648) 223-3070.
- Does John Zwiener accept Medicare?
- John Zwiener is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Zwiener's NPI active?
- Yes — John Zwiener's NPI (1518038496) is active in the NPPES registry as of the last update on 2025-06-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.