Karl Marzec, M.D.
NPI 1447520473 · Emergency Medicine Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karl Marzec, M.D. is a Emergency Medicine Physician provider in San Diego, CA (NPI 1447520473).
Provider details
- NPI number
- 1447520473
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A119448 (CA)
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
14 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
510 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 157 | $174 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 119 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 55 | $98 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 48 | $137 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Tracing93005 | 35 | $7 |
| Emergency Department Visit With Moderate Level of Medical Decision Making |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 36 | 36 |
| Tramadol Hcl | 29 | 29 |
| Famotidine | 13 | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-01-06
- Last updated
- 2023-03-06
- Certified
- 2023-03-06
Frequently asked questions
- What is Karl Marzec's NPI number?
- Karl Marzec's National Provider Identifier (NPI) is 1447520473, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl Marzec's specialty?
- Karl Marzec is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karl Marzec located?
- Karl Marzec's practice location on file with NPPES is 7901 Frost St, San Diego, CA 92123-2701.
- What is Karl Marzec's phone number?
- The practice phone number listed in the NPPES registry for Karl Marzec is (858) 939-3400.
- Does Karl Marzec accept Medicare?
- Karl Marzec is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karl Marzec's NPI active?
- Yes — Karl Marzec's NPI (1447520473) is active in the NPPES registry as of the last update on 2023-03-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.