Dr. Joseph Lee Klapper, MD

  • Hollister, CA
  • Cardiologist
NPI1881638260PAC ID1456252634
Medicare services, 2024
18
Medicare patients, 2024
21
Part D claims, 2024
346
Hospital affiliations
1
Industry payments
$159
Practice address
911 Sunset Drive, Hollister, CA 95032
Practice phone
Call (831) 637-5711
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Hazel Hawkins Memorial Hospital

Hospital · Hollister, California

See all 4 affiliations

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Dr. Joseph Lee Klapper is a cardiologist in Hollister, California

Dr. Klapper practices at Hazel Hawkins Memorial Hospital in Hollister, California, part of Hazel Hawkins.

Dr. Klapper's NPI, 1881638260, was assigned on June 15, 2006. Dr. Klapper graduated from Drexel University College Of Medicine in 1990. Dr. Klapper holds California license G84033.

NPI and contact details
Medicare PAC ID
1456252634
NPI enumeration date
June 15, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(831) 637-5711
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Male
Estimated age
62
Medical school graduation
1990

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Joseph Lee Klapper practices at Hazel Hawkins Memorial Hospital in Hollister, California

Dr. Klapper's primary practice is Hazel Hawkins Memorial Hospital, at 911 Sunset Drive, Hollister, CA 95032 in Santa Clara County. The practice phone is (831) 637-5711.

Source: Dmand AI Affiliation Data

Dr. Joseph Lee Klapper is affiliated with 3 sites of care and 1 medical group

Dr. Klapper's primary practice is Hazel Hawkins Memorial Hospital in Hollister, California, part of Hazel Hawkins. The medical group on file is Hazel Hawkins Memorial Hospital. Dmand AI also links Dr. Klapper to 1 more physician office and 1 group practice or clinic, each named with a free account. Dr. Klapper's employer is on file too: a hospital.

See all 4 affiliations for Dr. Klapper

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Joseph Lee Klapper's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Klapper practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Hazel Hawkins Memorial HospitalAvailable with a free account
+2 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Joseph Lee Klapper is one of 2,375 cardiologists in California

Cardiovascular disease is Dr. Klapper's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Klapper is board certified in cardiovascular disease by the American Board of Internal Medicine. Dmand AI has Dr. Klapper's licenses on file in 7 states: California, Wisconsin, Arizona, Kansas, Florida, Indiana and Georgia.

Specialties and state licenses

  • Cardiovascular disease, CaliforniaPrimaryLicense G84033 · 1997 to 2026 · taxonomy 207RC0000X
  • Wisconsin license2018 to 2025
  • Arizona licenseLicense 32318 · 2019 to 2023
  • Kansas license2018 to 2021
  • Florida license2017 to 2020
  • Indiana license2018 to 2019
  • Georgia license2006 to 2008

Clinical focus

Dmand AI lists atrial fibrillation and flutter, chronic hypertension, coronary artery disease, heart blockage, heart failure, heart valve disorders, high cholesterol and pulmonary heart disease among the conditions Dr. Klapper treats.

Cardiologists near Dr. Klapper

Counts of cardiologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Joseph Lee Klapper billed Medicare for 18 services in 2024

CMS data shows 18 Medicare services from Dr. Klapper across 1 procedure code in 2024, for 21 Medicare patients. Medicare paid $1,105 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 202418
Medicare patients21
Paid by Medicare$1,105
Procedure codes1

Dr. Klapper's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Tests and treatments
2023: 152024: 1820%

Dr. Klapper compared with the California median for cardiologists, 2024

  • Dr. Klapper
  • California median
Medicare services
18vs 1,56099% below
Medicare patients
21vs 64497% below
Part D claims
267vs 1,41081% below

Medians across 2,237 cardiologists in California with Dmand AI profiles that report each measure.

Dr. Klapper's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Klapper

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Klapper and other cardiologists in California.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Joseph Lee Klapper treated 21 Medicare patients in 2024, average age 72

CMS counts 21 Medicare patients who saw Dr. Klapper in 2024. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.43, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Klapper's median patient age at 63, with 72% women.

Medicare patients, 202421
Average age72
Average risk score1.43

Chronic conditions among Dr. Klapper's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis57%
  4. Ischemic heart disease57%

Share of Medicare patients with each condition. A patient can have several.

Dr. Klapper's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 63

Patient panel by sex, all payers

  • Women72%
  • Men28%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Joseph Lee Klapper wrote 346 Medicare Part D claims in 2024

In 2024, Dr. Klapper wrote 346 Medicare Part D claims for 43 patients. 77% of them were for generic drugs. CMS names the drug for 267 of them, across 12 drugs with 11 or more claims each, at $71,815 in total drug cost. In 2023, CMS named 224 claims across 11 drugs.

Part D claims, 2024346
Drugs named by CMS12
Total drug cost$71,815
Part D patients43

Dr. Klapper's Part D claims by kind of drug, 2024

  • Generic268 claims77%
  • Brand-name and other78 claims23%

Dr. Klapper's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 2242024: 26719%

Drugs named by CMS: 12 in 2024, 11 in 2023.

See all prescribing by Dr. Klapper

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

How Dr. Joseph Lee Klapper takes part in Medicare

Dr. Klapper accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Joseph Lee Klapper received $159 in industry payments from 2016 to 2024

CMS Open Payments shows 7 general payments to Dr. Klapper from 1 drug or device company from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $159.

General payments to Dr. Klapper by program year, 2016 to 2024

Companies that paid Dr. Klapper the most, 2016 to 2024

Share is of all general payments to this clinician.

See all payments to Dr. Klapper

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Joseph Lee Klapper graduated from Drexel University College Of Medicine

Dr. Klapper graduated from Drexel University College Of Medicine in 1990.

  1. Medical schoolDrexel University College Of Medicine
  2. Board certified in cardiovascular diseaseAmerican Board of Internal Medicine
  3. Board certified in cardiovascular diseaseNational Board of Physicians and Surgeons
  4. Board certified in internal medicineNational Board of Physicians and Surgeons

Source: Dmand AI Professional Profile Data

Dr. Joseph Lee Klapper accepts plans from 11 insurance carriers

Dr. Klapper is in network with 11 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Regence Health Plans
  • Aspirus Health Plan
  • +3 more carriersWith a free account

Plan types Dr. Klapper accepts, by number of carriers

  1. Medicare8
  2. PPO7
  3. POS5
  4. HMO4
  5. EPO3
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Joseph Lee Klapper's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Joseph Lee Klapper

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Joseph Lee Klapper's NPI number?

Dr. Joseph Lee Klapper's NPI number is 1881638260. It was assigned on June 15, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Joseph Lee Klapper?

Dr. Joseph Lee Klapper is a cardiologist in Hollister, California. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).

Where does Dr. Joseph Lee Klapper practice?

Dr. Klapper practices at 911 Sunset Drive, Hollister, CA 95032. Dr. Klapper's primary practice is Hazel Hawkins Memorial Hospital in Hollister, California, part of Hazel Hawkins. Dmand AI also links Dr. Klapper to 1 physician office and 1 group practice or clinic.

What is Dr. Joseph Lee Klapper's office phone number?

The practice phone on file for Dr. Klapper is (831) 637-5711.

What is Dr. Joseph Lee Klapper's medical license number?

Dr. Klapper holds California license G84033, one of the licenses on file in 7 states.

Which states has Dr. Joseph Lee Klapper been licensed in?

Dmand AI has state licenses on file for Dr. Klapper in California (1997 to 2026), Wisconsin (2018 to 2025), Arizona (2019 to 2023), Kansas (2018 to 2021), Florida (2017 to 2020), Indiana (2018 to 2019) and Georgia (2006 to 2008).

Which hospitals is Dr. Joseph Lee Klapper affiliated with?

Dr. Klapper practices at Hazel Hawkins Memorial Hospital in Hollister, California.

What medical group is Dr. Joseph Lee Klapper part of?

Dr. Klapper is linked to Hazel Hawkins Memorial Hospital.

Does Dr. Joseph Lee Klapper accept Medicare?

Yes. CMS data shows Dr. Klapper billed Medicare for 18 services in 2024, and Dr. Klapper accepts Medicare assignment.

How many Medicare patients does Dr. Joseph Lee Klapper see?

CMS counts 21 Medicare patients who saw Dr. Klapper in 2024, with an average age of 72.

Show 7 more questionsShow fewer questions

Is Dr. Joseph Lee Klapper board certified?

Yes. Dr. Klapper is board certified in cardiovascular disease by the American Board of Internal Medicine.

What services does Dr. Joseph Lee Klapper bill to Medicare?

In 2024, Dr. Klapper's most billed Medicare services were heart test or procedure (93306).

Where did Dr. Joseph Lee Klapper go to medical school?

Dr. Klapper graduated from Drexel University College Of Medicine in 1990.

What drugs does Dr. Joseph Lee Klapper prescribe most?

In 2024 Medicare Part D data, Dr. Klapper's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Carvedilol.

Has Dr. Joseph Lee Klapper received payments from drug or device companies?

CMS Open Payments shows $159 in general payments to Dr. Klapper from 1 company from 2016 to 2024. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).

How long has Dr. Joseph Lee Klapper been practicing?

Dr. Klapper graduated from medical school in 1990, 36 years ago.

What insurance does Dr. Joseph Lee Klapper accept?

Dr. Klapper is in network with 11 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

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