Daniel Lew

  • Baldwin Park, CA
  • Gastroenterologist
NPI1669859666PAC ID3375945660
Medicare patients, 2024
11
Part D claims, 2024
361
Publications
14
Hospital affiliations
2
Industry payments
$3,935
Practice address
1011 Baldwin Park Blvd, Baldwin Park, CA 91706
Practice phone
Call (626) 851-1011
Professional email
Get professional email
Personal email
Get personal email
Mobile number
Get mobile number
Social profiles

Primary practice

Kaiser Permanente Baldwin Park Medical Center

Hospital · Baldwin Park, California

Find Daniel Lew'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.

View contacts for free

Daniel Lew is a gastroenterologist in Baldwin Park, California

Daniel Lew practices at Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California, part of Kaiser Permanente.

Daniel Lew's NPI, 1669859666, was assigned on April 29, 2015. Daniel Lew graduated from Medical College Of Wisconsin in 2015. Daniel Lew holds California license A144634.

NPI and contact details
Medicare PAC ID
3375945660
NPI enumeration date
April 29, 2015
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(626) 851-1011
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
37
Medical school graduation
2015

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

Daniel Lew practices at Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California

Daniel Lew's primary practice is Kaiser Permanente Baldwin Park Medical Center, at 1011 Baldwin Park Blvd, Baldwin Park, CA 91706 in Los Angeles County. The practice phone is (626) 851-1011.

Source: Dmand AI Affiliation Data

Daniel Lew is affiliated with 2 sites of care and 1 medical group

Daniel Lew's primary practice is Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California, part of Kaiser Permanente. Daniel Lew is also affiliated with Cedars-Sinai Medical Center. The medical group on file is Southern California Permanente Medical Group.

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

Dmand AI tracks the EHR system at Daniel Lew's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Daniel Lew practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Kaiser Permanente Baldwin Park Medical CenterAvailable with a free account
+1 more affiliated siteAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

See the EHR and IT leaders at every hospital where Daniel Lew practices

Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.

Daniel Lew is one of 1,977 gastroenterologists in California

Gastroenterology is Daniel Lew's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Daniel Lew is board certified in gastroenterology by the American Board of Internal Medicine. Daniel Lew is licensed in California.

Specialties and state licenses

  • Gastroenterology, CaliforniaPrimaryLicense A144634 · 2016 to 2026 · taxonomy 207RG0100X

Clinical focus

Dmand AI lists colonoscopy and upper GI endoscopy among the conditions Daniel Lew treats.

Gastroenterologists near Daniel Lew

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

Daniel Lew treated 11 Medicare patients in 2024, average age 67

CMS counts 11 Medicare patients who saw Daniel Lew in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 1.25, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Daniel Lew's median patient age at 64, with 63% women.

Medicare patients, 202411
Average age67
Average risk score1.25

Daniel Lew's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Daniel Lew's patients across all payers

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

Patient panel by age, all payers

Median age 64

Patient panel by sex, all payers

  • Women63%
  • Men37%

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

Daniel Lew wrote 361 Medicare Part D claims in 2024

In 2024, Daniel Lew wrote 361 Medicare Part D claims for 159 patients. 86% of them were for generic drugs. CMS names the drug for 252 of them, across 6 drugs with 11 or more claims each, at $35,283 in total drug cost. In 2023, CMS named 193 claims across 6 drugs.

Part D claims, 2024361
Drugs named by CMS6
Total drug cost$35,283
Part D patients159

Daniel Lew's Part D claims by kind of drug, 2024

  • Generic311 claims86%
  • Brand-name and other50 claims14%

Daniel Lew'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 Daniel Lew's Part D claims, 2024

  • Antibiotics16%59 of 361 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: 1932024: 25231%

Drugs named by CMS: 6 in 2024, 6 in 2023.

See all prescribing by Daniel Lew

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 Daniel Lew takes part in Medicare

Daniel Lew accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)

Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)

Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)

For MedTech and pharma teams

Find gastroenterologists like Daniel Lew by procedure volume and prescribing

Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.

Daniel Lew has 14 publications on record

Dmand AI links 14 papers to Daniel Lew, published from 2014 to 2022. 2016 was the busiest year, with 3. The most frequent topics are Saccharomyces cerevisiae, Cell Polarity and Saccharomyces cerevisiae Proteins. Daniel Lew has published most often in Curr Biol. Daniel Lew's most frequent co-author is Kyle David Moran, DO.

Papers14
Years published2014 to 2022

Daniel Lew's papers by year, 2014 to 2022

Topics Daniel Lew writes about most

  • Saccharomyces cerevisiae
  • Cell Polarity
  • Saccharomyces cerevisiae Proteins
  • cdc42 GTP-Binding Protein, Saccharomyces cerevisiae
  • Signal Transduction
  • Actin Cytoskeleton
  • Cell Cycle Proteins
  • Cell Membrane

Daniel Lew's most frequent co-authors

Recent publications by Daniel Lew

See all 14 publications and co-authors

See who Daniel Lew researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Daniel Lew 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

Daniel Lew received $3,935 in industry payments from 2017 to 2025

CMS Open Payments shows 35 general payments to Daniel Lew from 12 drug and device companies from 2017 to 2025. Travel and lodging make up the largest share, 53% of the total. Boston Scientific Corporation paid the most, $2,864.

General payments to Daniel Lew by program year, 2017 to 2025

General payments to Daniel Lew by kind, 2017 to 2025

$3.9Kin total
  • Travel and lodging$2,07253%
  • Food and beverage$1,86347%

Companies that paid Daniel Lew the most, 2017 to 2025

Share is of all general payments to this clinician.

See all payments to Daniel Lew

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

Daniel Lew graduated from Medical College Of Wisconsin

Daniel Lew graduated from Medical College Of Wisconsin in 2015.

  1. Medical schoolMedical College Of Wisconsin
  2. Board certified in gastroenterologyAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Daniel Lew accepts plans from 7 insurance carriers

Daniel Lew is in network with 7 carriers, including Blue Cross Blue Shield of Michigan, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.

  • Blue Cross Blue Shield of Michigan
  • Kaiser Permanente
  • Blue Cross Blue Shield of Massachusetts
  • Elevance
  • HCSC
  • Regence Health Plans
  • CMS Medicare

Plan types Daniel Lew accepts, by number of carriers

  1. Medicare5
  2. PPO4
  3. HMO3
  4. POS2
  5. EPO1
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Daniel Lew'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 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)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)
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 Daniel Lew

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

What is Daniel Lew's NPI number?

Daniel Lew's NPI number is 1669859666. It was assigned on April 29, 2015, and it is active in the NPI Registry.

What does Daniel Lew specialize in?

Daniel Lew is a gastroenterologist in Baldwin Park, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Daniel Lew practice?

Daniel Lew practices at 1011 Baldwin Park Blvd, Baldwin Park, CA 91706. Daniel Lew's primary practice is Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California, part of Kaiser Permanente.

What is Daniel Lew's office phone number?

The practice phone on file for Daniel Lew is (626) 851-1011.

What is Daniel Lew's medical license number?

Daniel Lew holds California license A144634.

Which hospitals is Daniel Lew affiliated with?

Daniel Lew practices at Kaiser Permanente Baldwin Park Medical Center in Baldwin Park, California. Daniel Lew is also affiliated with Cedars-Sinai Medical Center.

What medical group is Daniel Lew part of?

Daniel Lew is linked to Southern California Permanente Medical Group.

Does Daniel Lew accept Medicare?

Yes. CMS lists Daniel Lew as accepting Medicare assignment.

How many Medicare patients does Daniel Lew see?

CMS counts 11 Medicare patients who saw Daniel Lew in 2024, with an average age of 67.

Is Daniel Lew board certified?

Yes. Daniel Lew is board certified in gastroenterology by the American Board of Internal Medicine.

Show 7 more questionsShow fewer questions

Where did Daniel Lew go to medical school?

Daniel Lew graduated from Medical College Of Wisconsin in 2015.

What drugs does Daniel Lew prescribe most?

In 2024 Medicare Part D data, Daniel Lew's most prescribed drugs by claims were Omeprazole, Ciprofloxacin HCl and Lubiprostone.

Has Daniel Lew received payments from drug or device companies?

CMS Open Payments shows $3,935 in general payments to Daniel Lew from 12 companies from 2017 to 2025. The largest total came from Boston Scientific Corporation.

How long has Daniel Lew been practicing?

Daniel Lew graduated from medical school in 2015, 11 years ago.

Does Daniel Lew do research?

Dmand AI links 14 publications to Daniel Lew, published from 2014 to 2022.

Who does Daniel Lew publish with?

Daniel Lew's most frequent co-authors are Kyle David Moran, DO (1 shared paper).

What insurance does Daniel Lew accept?

Daniel Lew is in network with 7 carriers, including Blue Cross Blue Shield of Michigan, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.

Selling to gastroenterology practices?

See gastroenterologists in California by site of care and group

Find the practices, groups and hospitals they work with, and the right people to contact at each.

  • 30 days free
  • Self-serve
  • No credit card

Cookie settings

Turn each category on or off. Your choice is kept for 12 months and you can change it here at any time.

Necessary

Always on. Sign-in, security, downloads you asked for, your cookie choice, and the page that led to a signup.

View cookies (6)
  • dm_consentDmand AI. Your cookie choices and whether your browser sent a Global Privacy Control signal. 12 months.
  • dm_ft, dm_ltDmand AI. The first and the latest page you arrived on, with the date, so a signup is credited to the page that worked. 90 days, 30 days.
  • dm_fs, dm_lsDmand AI. The first and the latest source of a visit (a search engine, a campaign or the site that linked here). 90 days, 30 days.
  • dm_dl, dm_dl_okDmand AI. After you give an email address for a download, lets you download files without being asked again. 30 days.
  • Session and CSRF cookiesDmand AI (app.dmand.ai). Sign-in and form protection in the application. Session.
  • __cf_bm, cf_clearanceCloudflare. Tells people from automated traffic and keeps the site available. 30 minutes; cf_clearance while a security check is valid.

Analytics

On unless you turn it off. How pages are used, in aggregate, and recordings of how pages are used.

View cookies (6)
  • Google Tag ManagerGoogle. Loads the analytics and marketing tags that are on. Sets no cookie of its own and does not load when both categories are off. n/a.
  • _ga, _ga_<container-id>Google Analytics 4. Visits and page views in aggregate on dmand.ai. 2 years.
  • _clck, _clskMicrosoft Clarity. Recordings and heatmaps of how pages are used, with form fields masked. 1 year, 1 day.
  • CLID, MUID, ANONCHK, MR, SMMicrosoft (clarity.ms). Set by Microsoft when Clarity loads, to recognize a browser across sites that use Clarity. Up to 1 year.
  • None (cookieless)Ahrefs Analytics. Page views in aggregate. n/a.
  • ph_<project>_posthogPostHog. Product usage, errors and performance in app.dmand.ai, used to fix bugs and improve features. 365 days.

Marketing

On unless you turn it off, and always off when your browser sends a Global Privacy Control signal. A visitor identification service tells our sales team which companies and people visit.

View cookies (6)
  • _reb2buid, _reb2butkRB2B. Recognizes a returning browser for visitor identification. 360 days, 1 year.
  • _reb2bgeoRB2B. The location used to decide whether a visit can be identified. 20 days.
  • _reb2brefRB2B. The page or site that referred the visit. 15 days.
  • _reb2bfxf, _reb2btd, _reb2bliRB2B. Links the visit to an identified business profile. 1 month.
  • _reb2bresolveRB2B. Holds a match while it is being resolved. 2 days.
  • _reb2sessionID, _reb2bloadedRB2B. The current visit, and a guard against loading the script twice. 30 minutes, 1 second.

Functional

On unless you turn it off. Remembers choices such as a collapsed section.

View cookies (none today)