Dr. Linnea I. Chap, MD
- Medicare services, 2024
- 7,174
- Medicare patients, 2024
- 191
- Part D claims, 2024
- 1,011
- Publications
- 3
- Clinical trials
- 6
- Practice address
- 8900 Wilshire Blvd, Beverly Hills, CA 90211
- Practice phone
- Call (310) 474-2010
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Westwood Eye Surgical Institute, Inc.
Beverly Hills, California
Find Dr. Chap's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Linnea I. Chap is a hematologist and oncologist in Beverly Hills, California
Dr. Chap practices at Westwood Eye Surgical Institute, Inc. in Beverly Hills, California.
Dr. Chap's NPI, 1700839362, was assigned on May 17, 2006. Dr. Chap graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1988. Dr. Chap holds California license G73680.
- NPI
- 1700839362NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234188301
- NPI enumeration date
- May 17, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (310) 474-2010
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Linnea I. Chap practices at Westwood Eye Surgical Institute, Inc. in Beverly Hills, California
Dr. Chap's primary practice is Westwood Eye Surgical Institute, Inc., at 8900 Wilshire Blvd, Beverly Hills, CA 90211 in Los Angeles County. The practice phone is (310) 474-2010.
- Westwood Eye Surgical Institute, Inc.8900 Wilshire Blvd, Beverly Hills, CA 90211 · Los Angeles CountyPhone(310) 474-2010
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Linnea I. Chap is affiliated with 6 sites of care and 3 medical groups
Dr. Chap's primary practice is Westwood Eye Surgical Institute, Inc. in Beverly Hills, California. Dr. Chap is also affiliated with Ronald Reagan UCLA Medical Center. The medical group on file is Beverly Hills Cancer Center. Dmand AI also links Dr. Chap to 2 more hospitals, 2 group practices and clinics and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Linnea I. Chap's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chap practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Westwood Eye Surgical Institute, Inc. | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Linnea I. Chap is one of 1,502 hematologists and oncologists in California
Hematology and oncology is Dr. Chap's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Chap is licensed in California.
Specialties and state licenses
- Hematology and oncology, CaliforniaPrimary
Hematologists and oncologists near Dr. Chap
Counts of hematologists and oncologists 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. Linnea I. Chap billed Medicare for 7,174 services in 2024
CMS data shows 7,174 Medicare services from Dr. Chap across 13 procedure codes in 2024, for 191 Medicare patients. Medicare paid $165,839 for them. Every service was in an office.
Dr. Chap's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 6,2472024: 4,86022%
- Lab and pathology
- 2023: 1,3562024: 1,3242%
- Office and hospital visits
- 2023: 5242024: 44914%
- Surgery
- 2023: 3672024: 3544%
- Tests and treatments
- 2023: 2172024: 18714%
Dr. Chap compared with the California median for hematologists and oncologists, 2024
- Dr. Chap
- California median
- Medicare services
- 7,174vs 9327.7 times
- Medicare patients
- 191vs 22515% below
- Part D claims
- 839vs 3942.1 times
Medians across 1,367 hematologists and oncologists in California with Dmand AI profiles that report each measure.
Dr. Chap'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chap and other hematologists and oncologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Linnea I. Chap treated 191 Medicare patients in 2024, average age 71
CMS counts 191 Medicare patients who saw Dr. Chap in 2024. The largest group is 65 to 74, with 118 patients. 75% of them have cancer, and 67% have high cholesterol. 46% are also on Medicaid. Their average risk score is 1.17, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chap's median patient age at 63, with 99% women.
Dr. Chap's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Chap's Medicare patients, 2024
- Cancer75%
- High cholesterol67%
- High blood pressure66%
- Osteoporosis51%
- Arthritis46%
- Diabetes27%
- Anxiety21%
- Ischemic heart disease20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chap'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
- Women99%
- Men1%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Linnea I. Chap wrote 1,011 Medicare Part D claims in 2024
In 2024, Dr. Chap wrote 1,011 Medicare Part D claims for 134 patients. 82% of them were for generic drugs. CMS names the drug for 839 of them, across 25 drugs with 11 or more claims each, at $1,370,205 in total drug cost. In 2023, CMS named 826 claims across 24 drugs.
Dr. Chap's Part D claims by kind of drug, 2024
- Generic832 claims82%
- Brand-name179 claims18%
Dr. Chap'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.
Drug classes CMS tracks in Dr. Chap's Part D claims, 2024
- Opioids2%17 of 1,011 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8262024: 8392%
Drugs named by CMS: 25 in 2024, 24 in 2023.
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
Dr. Linnea I. Chap offers telehealth to Medicare patients
Dr. Chap accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chap as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Linnea I. Chap has 3 publications on record
Dmand AI links 3 papers to Dr. Chap, published from 2012 to 2025. Dr. Chap has published most often in Nat Commun. Dr. Chap's most frequent co-authors are Pavani Chalasani, MD, William J. Gradishar, MD and Jason Michael Melear, MD.
Dr. Chap's papers by year, 2012 to 2025
Dr. Chap's most frequent co-authors
- Pavani Chalasani, MD2 shared papers
- William J. Gradishar, MD2 shared papers
- Jason Michael Melear, MD2 shared papers
Recent publications by Dr. Chap
See who Dr. Chap researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chap works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Linnea I. Chap has worked on 6 clinical trials
Dmand AI links Dr. Chap to 6 clinical trials, 2 of them phase 3 studies. 2 are still active or recruiting. Conditions studied include Breast Neoplasms, Breast Diseases and Carcinoma, Ductal, Breast. Eli Lilly and Company sponsors the most, 3. Open Payments lists research payments to Dr. Chap that name 2 trials.
Clinical trials with Dr. Chap by phase
- 1Phase 1: 1 trial
- NonePhase 2: no trials
- 2Phase 3: 2 trials
- NonePhase 4: no trials
Conditions in Dr. Chap's trials
- Breast Neoplasms
- Breast Diseases
- Carcinoma, Ductal, Breast
- Endometrial Neoplasms
- Multiple Endocrine Neoplasia Type 1
Investigators on the most trials with Dr. Chap
- Shakeela Wazeen Bahadur, MD3 shared trials
- Margaret Block, MD3 shared trials
- Erika P. Hamilton, MD3 shared trials
Recent clinical trials with Dr. Chap
G1T48, an Oral SERD, Alone and in Combination With Palbociclib in ER-Positive, HER2-Negative Advanced Breast Cancer (opens in a new tab)
Endocrine Therapy With or Without Abemaciclib (LY2835219) Following Surgery in Participants With Breast Cancer (opens in a new tab)
A Study of LY3484356 in Participants With Advanced or Metastatic Breast Cancer or Endometrial Cancer (opens in a new tab)
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Linnea I. Chap received $783,769 in industry payments from 2016 to 2025
CMS Open Payments shows 1,993 general payments to Dr. Chap from 94 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 63% of the total. Pfizer Inc. paid the most, $261,637. It also lists 9 research payments totaling $11,004 from 2017 to 2023, naming 2 clinical trials.
General payments to Dr. Chap by program year, 2016 to 2025
General payments to Dr. Chap by kind, 2016 to 2025
- Speaker and faculty fees$495,75963%
- Consulting fees$124,74516%
- Travel and lodging$111,74114%
- Food and beverage$45,0156%
- Other$5,9961%
Companies that paid Dr. Chap the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Linnea I. Chap graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Chap graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Linnea I. Chap's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Linnea I. Chap
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. Linnea I. Chap's NPI number?
Dr. Linnea I. Chap's NPI number is 1700839362. It was assigned on May 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Linnea I. Chap?
Dr. Linnea I. Chap is a hematologist and oncologist in Beverly Hills, California. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Linnea I. Chap practice?
Dr. Chap practices at 8900 Wilshire Blvd, Beverly Hills, CA 90211. Dr. Chap's primary practice is Westwood Eye Surgical Institute, Inc. in Beverly Hills, California. Dmand AI also links Dr. Chap to 2 hospitals, 2 group practices and clinics and 2 medical groups.
What is Dr. Linnea I. Chap's office phone number?
The practice phone on file for Dr. Chap is (310) 474-2010.
What is Dr. Linnea I. Chap's medical license number?
Dr. Chap holds California license G73680.
Which hospitals is Dr. Linnea I. Chap affiliated with?
Dr. Chap is affiliated with Ronald Reagan UCLA Medical Center. Dmand AI links Dr. Chap to 2 more hospitals.
What medical group is Dr. Linnea I. Chap part of?
Dr. Chap is linked to Beverly Hills Cancer Center. Dmand AI links Dr. Chap to 2 more medical groups.
Does Dr. Linnea I. Chap accept Medicare?
Yes. CMS data shows Dr. Chap billed Medicare for 7,174 services in 2024, and Dr. Chap accepts Medicare assignment.
Does Dr. Linnea I. Chap offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chap as offering telehealth services.
How many Medicare patients does Dr. Linnea I. Chap see?
CMS counts 191 Medicare patients who saw Dr. Chap in 2024, with an average age of 71.
Show 7 more questionsShow fewer questions
What services does Dr. Linnea I. Chap bill to Medicare?
In 2024, Dr. Chap's most billed Medicare services were injected or infused drug (J0897), lab and pathology test (85025) and lab and pathology test (80053).
Where did Dr. Linnea I. Chap go to medical school?
Dr. Chap graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1988.
What drugs does Dr. Linnea I. Chap prescribe most?
In 2024 Medicare Part D data, Dr. Chap's most prescribed drugs by claims were Letrozole, Alendronate Sodium and Anastrozole.
Has Dr. Linnea I. Chap received payments from drug or device companies?
CMS Open Payments shows $783,769 in general payments to Dr. Chap from 94 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Linnea I. Chap been practicing?
Dr. Chap graduated from medical school in 1988, 38 years ago.
Does Dr. Linnea I. Chap do research?
Dmand AI links 3 publications to Dr. Chap, published from 2012 to 2025. Dr. Chap has worked on 6 clinical trials.
Who does Dr. Linnea I. Chap publish with?
Dr. Chap's most frequent co-authors are Pavani Chalasani, MD (2 shared papers), William J. Gradishar, MD (2 shared papers) and Jason Michael Melear, MD (2 shared papers).
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