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Pathology

Yalda B. Naeini, MD

Works at hospitals in Santa Monica, CA · California

Summary

Dr. Yalda B. Naeini, MD is a pathologist at 2121 Santa Monica Blvd, Santa Monica, CA 90404. Phone: (310) 829-8101. Accepts Medicare assignment. In 2024, Yalda B. Naeini had 884 Original Medicare patients and 4,475 services. NPI 1104169424. 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.

  • Specialty: Pathologist (Medicare lists Pathology)
  • Address: 2121 Santa Monica Blvd, Santa Monica, CA 90404 · Directions
  • Phone: (310) 829‑8101
  • Medicare: Accepts Medicare assignment
  • Hospital: Saint John's Health Center
  • Group practice: Pathology Medical Group of Saint Johns
  • Medical school: graduated 2010 (16 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Yalda B. Naeini, 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 Yalda B. Naeini accept Medicare assignment?
Yes. Medicare's clinician data says Yalda B. Naeini 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 Yalda B. Naeini see?
In 2024, CMS data shows 884 Original Medicare patients and 4,475 services for Yalda B. Naeini. This counts Original Medicare only and measures volume, not quality.
What is Yalda B. Naeini's NPI number?
1104169424. 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 Yalda B. Naeini, 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 patients884
Services billed to Medicare4,475
Different services or procedures42
Participating Medicare providerYes
Average age of these patients77

Most frequent services

  1. Pathology examination of tissue using a microscope, intermediate complexity (88305)1,242 services
  2. Special stained specimen slides to examine tissue, each additional procedure (88341)912 services
  3. Microscopic genetic analysis of tumor, manual (88360)313 services
  4. Special stained specimen slides to examine tissue, initial procedure (88342)295 services
  5. Special stained specimen slides to examine tissue including interpretation and report (88313)222 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 cholesterol75%
  • Arthritis64%
  • Ischemic heart disease44%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)33%
  • Diabetes30%

Hospitals where Yalda B. Naeini works

Medicare's Facility Affiliation Data lists Yalda B. Naeini 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 Yalda B. Naeini is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Yalda B. Naeini as a member of this group (CMS data updated October 2, 2026).

  • Pathology Medical Group of Saint Johns8 clinicians in the group

Specialties

Find other Pathology doctors in California →

Other pathologists in Santa Monica

Clinicians with the same Medicare primary specialty in Santa Monica, CA — not a recommendation.

All pathologists in Santa Monica →

Other clinicians in Pathology Medical Group of Saint Johns

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

Clinician information

CredentialMD
Graduation year2010 (16 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1104169424
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