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Hospitalist

Carlos A. Lago Hernandez, MD

Works at hospitals in San Diego, CA · California

Summary

Dr. Carlos A. Lago Hernandez, MD is a hospitalist at 200 W Arbor Dr, San Diego, CA 92103. Phone: (858) 657-7000. Accepts Medicare assignment. In 2024, Carlos A. Lago Hernandez had 62 Original Medicare patients and 64 services. NPI 1558756270. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Carlos A. Lago Hernandez, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Carlos A. Lago Hernandez accept Medicare assignment?
Yes. Medicare's clinician data says Carlos A. Lago Hernandez accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Carlos A. Lago Hernandez see?
In 2024, CMS data shows 62 Original Medicare patients and 64 services for Carlos A. Lago Hernandez. This counts Original Medicare only and measures volume, not quality.
What is Carlos A. Lago Hernandez's NPI number?
1558756270. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Carlos A. Lago Hernandez, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients62
Services billed to Medicare64
Different services or procedures3
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)62 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol71%
  • Arthritis61%
  • Heart failure50%
  • Chronic kidney disease47%
  • Diabetes45%

Hospitals where Carlos A. Lago Hernandez works

Medicare's Facility Affiliation Data lists Carlos A. Lago Hernandez at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Carlos A. Lago Hernandez is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Carlos A. Lago Hernandez as a member of this group (CMS data updated October 2, 2026).

  • Regents of the University of California2,089 clinicians in the group

Specialties

Find other Hospitalist doctors in California →

Other hospitalists in San Diego

Clinicians with the same Medicare primary specialty in San Diego, CA — not a recommendation.

All hospitalists in San Diego →

Other clinicians in Regents of the University of California

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolHarvard Medical School
Graduation year2015 (11 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1558756270
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians