Dr. William Nelson Katkov, MD

  • Santa Monica, CA
  • Gastroenterologist
NPI1386693646PAC ID8921072281
Medicare services, 2024
1,271
Medicare patients, 2024
691
Part D claims, 2024
686
Publications
11
MIPS score, 2024
89
Practice address
1919 Santa Monica Blvd, Santa Monica, CA 90404
Practice phone
Call (310) 385-3200
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Cedars-Sinai Medical Care Foundation

Santa Monica, California

See all 11 affiliations

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Dr. William Nelson Katkov is a gastroenterologist in Santa Monica, California

Dr. Katkov practices at Cedars-Sinai Medical Care Foundation in Santa Monica, California.

Dr. Katkov's NPI, 1386693646, was assigned on May 6, 2006. Dr. Katkov graduated from Keck School of Medicine of USC in 1983. Dr. Katkov holds California license G54468.

NPI and contact details
Medicare PAC ID
8921072281
NPI enumeration date
May 6, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(310) 385-3200
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
69
Medical school graduation
1983

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

Dr. William Nelson Katkov practices at Cedars-Sinai Medical Care Foundation in Santa Monica, California

Dr. Katkov's primary practice is Cedars-Sinai Medical Care Foundation, at 1919 Santa Monica Blvd, Santa Monica, CA 90404 in Los Angeles County. The practice phone is (310) 385-3200.

  • Cedars-Sinai Medical Care Foundation
    1919 Santa Monica Blvd, Santa Monica, CA 90404 · Los Angeles CountyPhone(310) 385-3200

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. William Nelson Katkov is affiliated with 7 sites of care and 4 medical groups

Dr. Katkov's primary practice is Cedars-Sinai Medical Care Foundation in Santa Monica, California. Dr. Katkov is also affiliated with Cedars-Sinai Medical Center. The medical group on file is Cedars-Sinai Medical Group. Dmand AI also links Dr. Katkov to 1 more hospital, 4 group practices and clinics and 3 medical groups, each named with a free account.

See all 11 affiliations for Dr. Katkov

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. William Nelson Katkov's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Katkov practices, 6 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Cedars-Sinai Medical Care FoundationAvailable with a free account
+6 more sites and 3 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. William Nelson Katkov is one of 1,977 gastroenterologists in California

Gastroenterology is Dr. Katkov's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Katkov is board certified in internal medicine by the American Board of Internal Medicine. Dr. Katkov is licensed in California.

Specialties and state licenses

  • Gastroenterology, CaliforniaPrimaryLicense G54468 · 1985 to 2026 · taxonomy 207RG0100X

Clinical focus

Dmand AI lists acid reflux, chronic indigestion, colonoscopy, gastroduodenitis, gastroenteritis, gastrointestinal bleeding, hemorrhoids and intestinal diverticulosis among the conditions Dr. Katkov treats.

Gastroenterologists near Dr. Katkov

Counts of gastroenterologists 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. William Nelson Katkov billed Medicare for 1,271 services in 2024

CMS data shows 1,271 Medicare services from Dr. Katkov across 15 procedure codes in 2024, for 691 Medicare patients. Medicare paid $133,319 for them.

Medicare services, 20241,271
Medicare patients691
Paid by Medicare$133,319
Procedure codes15

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

  • 2023
  • 2024
Office and hospital visits
2023: 8792024: 77712%
Surgery
2023: 4542024: 4198%
Other services
2023: 762024: 751%

Where Dr. Katkov's Medicare services took place, 2024

  • In an office53342%
  • In a facility73858%

Dr. Katkov compared with the California median for gastroenterologists, 2024

  • Dr. Katkov
  • California median
Medicare services
1,271vs 5862.2 times
Medicare patients
691vs 3022.3 times
Part D claims
565vs 38049% above

Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.

Dr. Katkov'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. Katkov

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

Dr. William Nelson Katkov treated 691 Medicare patients in 2024, average age 76

CMS counts 691 Medicare patients who saw Dr. Katkov in 2024. The largest group is 65 to 74, with 324 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 18% are also on Medicaid. Their average risk score is 1.53, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Katkov's median patient age at 65, with 53% women.

Medicare patients, 2024691
Average age76
Average risk score1.53
Also on Medicaid18%

Dr. Katkov's Medicare patients by age, 2024

Dr. Katkov's Medicare patients by sex, 2024

  • Women36152%
  • Men33048%

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

  1. High cholesterol75%
  2. High blood pressure71%
  3. Arthritis53%
  4. Ischemic heart disease40%
  5. Diabetes29%
  6. Mood disorders29%
  7. Anxiety26%
  8. Depression26%

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

Dr. Katkov's patients across all payers

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

Patient panel by age, all payers

Median age 65

Patient panel by sex, all payers

  • Women53%
  • Men46%

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

Dr. William Nelson Katkov wrote 686 Medicare Part D claims in 2024

In 2024, Dr. Katkov wrote 686 Medicare Part D claims for 371 patients. 89% of them were for generic drugs. CMS names the drug for 565 of them, across 10 drugs with 11 or more claims each, at $66,175 in total drug cost. In 2023, CMS named 482 claims across 12 drugs.

Part D claims, 2024686
Drugs named by CMS10
Total drug cost$66,175
Part D patients371

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

  • Generic610 claims89%
  • Brand-name76 claims11%

Dr. Katkov'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. Katkov's Part D claims, 2024

  • Antibiotics5%32 of 686 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: 4822024: 56517%

Drugs named by CMS: 10 in 2024, 12 in 2023.

See all prescribing by Dr. Katkov

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. William Nelson Katkov scored 89 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Katkov for performance year 2024, reported as part of a group. Dr. Katkov accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Katkov as offering telehealth. CMS counts 195 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Katkov, more than 90% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Katkov's MIPS scores, performance year 2024

  • 89of 100Final score
  • 84.8of 100Quality
  • 99of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 73of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Where Dr. Katkov ranks in Medicare procedure volume

Upper gastrointestinal (GI) endoscopy for acid reflux
90th percentile195 procedures
Colonoscopy
90th percentile164 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)

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Dr. William Nelson Katkov has 11 publications on record

Dmand AI links 11 papers to Dr. Katkov. The most frequent topics are Hepatitis B Surface Antigens, Hepatitis B Vaccines and Hepatitis C. Dr. Katkov's most frequent co-authors are Hays L. Arnold, MD, Mark S. Avila, MD and Michael A. Biederman, DO.

Papers11

Topics Dr. Katkov writes about most

  • Hepatitis B Surface Antigens
  • Hepatitis B Vaccines
  • Hepatitis C
  • Radioimmunoassay

Dr. Katkov's most frequent co-authors

Recent publications by Dr. Katkov

See all 11 publications and co-authors

See who Dr. Katkov researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Katkov works with, so you can find a warm path to the right gastroenterologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. William Nelson Katkov received $4,543 in industry payments from 2016 to 2025

CMS Open Payments shows 215 general payments to Dr. Katkov from 32 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Abbvie Inc. paid the most, $1,309.

General payments to Dr. Katkov by program year, 2016 to 2025

General payments to Dr. Katkov by kind, 2016 to 2025

$4.5Kin total
  • Food and beverage$4,45998%
  • Consulting fees$621%
  • Education$220%

Companies that paid Dr. Katkov the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Katkov

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

Dr. William Nelson Katkov has 1 award and honors on record

Dmand AI lists 1 award for Dr. Katkov.

Awards and honors for Dr. Katkov

  1. Undated
    • Super Doc

Source: Dmand AI Professional Profile Data

Dr. William Nelson Katkov graduated from Keck School of Medicine of USC

Dr. Katkov graduated from Keck School of Medicine of USC in 1983. Dr. Katkov is a member of ACP.

  1. Medical schoolKeck School of Medicine of USC
  2. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. William Nelson Katkov accepts plans from 13 insurance carriers

Dr. Katkov is in network with 13 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. 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
  • Alliant Health Plans
  • +5 more carriersWith a free account

Plan types Dr. Katkov accepts, by number of carriers

  1. PPO10
  2. Medicare8
  3. EPO4
  4. HMO4
  5. POS4

Source: Dmand AI Insurance Network Data

Sources for Dr. William Nelson Katkov'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 phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
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. William Nelson Katkov

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. William Nelson Katkov's NPI number?

Dr. William Nelson Katkov's NPI number is 1386693646. It was assigned on May 6, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. William Nelson Katkov?

Dr. William Nelson Katkov is a gastroenterologist in Santa Monica, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Dr. William Nelson Katkov practice?

Dr. Katkov practices at 1919 Santa Monica Blvd, Santa Monica, CA 90404. Dr. Katkov's primary practice is Cedars-Sinai Medical Care Foundation in Santa Monica, California. Dmand AI also links Dr. Katkov to 1 hospital, 4 group practices and clinics and 3 medical groups.

What is Dr. William Nelson Katkov's office phone number?

The practice phone on file for Dr. Katkov is (310) 385-3200.

What is Dr. William Nelson Katkov's medical license number?

Dr. Katkov holds California license G54468.

Which hospitals is Dr. William Nelson Katkov affiliated with?

Dr. Katkov is affiliated with Cedars-Sinai Medical Center. Dmand AI links Dr. Katkov to 1 more hospital.

What medical group is Dr. William Nelson Katkov part of?

Dr. Katkov is linked to Cedars-Sinai Medical Group. Dmand AI links Dr. Katkov to 3 more medical groups.

Does Dr. William Nelson Katkov accept Medicare?

Yes. CMS data shows Dr. Katkov billed Medicare for 1,271 services in 2024, and Dr. Katkov accepts Medicare assignment.

Does Dr. William Nelson Katkov offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Katkov as offering telehealth services.

What is Dr. William Nelson Katkov's MIPS score?

Dr. Katkov's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. William Nelson Katkov see?

CMS counts 691 Medicare patients who saw Dr. Katkov in 2024, with an average age of 76.

Is Dr. William Nelson Katkov board certified?

Yes. Dr. Katkov is board certified in internal medicine by the American Board of Internal Medicine.

What services does Dr. William Nelson Katkov bill to Medicare?

In 2024, Dr. Katkov's most billed Medicare services were surgery: digestive system (43239), office visit, established patient (99214) and surgery: digestive system (45380).

Where did Dr. William Nelson Katkov go to medical school?

Dr. Katkov graduated from Keck School of Medicine of USC in 1983.

What drugs does Dr. William Nelson Katkov prescribe most?

In 2024 Medicare Part D data, Dr. Katkov's most prescribed drugs by claims were Sod Sulf-Potass Sulf-Mag Sulf, Omeprazole and Pantoprazole Sodium.

Has Dr. William Nelson Katkov received payments from drug or device companies?

CMS Open Payments shows $4,543 in general payments to Dr. Katkov from 32 companies from 2016 to 2025. The largest total came from Abbvie Inc.

How long has Dr. William Nelson Katkov been practicing?

Dr. Katkov graduated from medical school in 1983, 43 years ago.

Does Dr. William Nelson Katkov do research?

Dmand AI links 11 publications to Dr. Katkov.

Who does Dr. William Nelson Katkov publish with?

Dr. Katkov's most frequent co-authors are Hays L. Arnold, MD (1 shared paper), Mark S. Avila, MD (1 shared paper) and Michael A. Biederman, DO (1 shared paper).

What insurance does Dr. William Nelson Katkov accept?

Dr. Katkov is in network with 13 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

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