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Hematology/Oncology

Paul R. Kaesberg, MD

Works at hospitals in Placerville, CA · Redding, CA · Sacramento, CA · California

Summary

Dr. Paul R. Kaesberg, MD is a hematologist-oncologist at 3850 G St, Merced, CA 95340. Phone: (209) 384-6528. Accepts Medicare assignment. In 2024, Paul R. Kaesberg had 426 Original Medicare patients and 1,612 services. NPI 1023084035. 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 Paul R. Kaesberg, 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 Paul R. Kaesberg accept Medicare assignment?
Yes. Medicare's clinician data says Paul R. Kaesberg 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 Paul R. Kaesberg see?
In 2024, CMS data shows 426 Original Medicare patients and 1,612 services for Paul R. Kaesberg. This counts Original Medicare only and measures volume, not quality.
What is Paul R. Kaesberg's NPI number?
1023084035. 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 Paul R. Kaesberg, 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 patients426
Services billed to Medicare1,612
Different services or procedures23
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)492 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)411 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)140 services
  4. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)87 services
  5. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)39 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 pressure73%
  • High cholesterol72%
  • Arthritis47%
  • Chronic kidney disease35%
  • Ischemic heart disease30%
  • Diabetes29%

Hospitals where Paul R. Kaesberg works

Medicare's Facility Affiliation Data lists Paul R. Kaesberg 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 Paul R. Kaesberg is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Paul R. Kaesberg as a member of this group (CMS data updated October 2, 2026).

  • Regents of the Univ of Ca1,584 clinicians in the group

Specialties

Find other Hematology/Oncology doctors in California →

Other hematologist-oncologists in Merced

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

All hematologist-oncologists in Merced →

Other clinicians in Regents of the Univ of Ca

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

Clinician information

CredentialMD
Medical schoolUniversity Of Wisconsin School Of Medicine
Graduation year1982 (44 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1023084035
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