Dr. Margaret Jiemin Zhou, MD

  • Stanford, CA
  • Gastroenterologist
NPI1184157992PAC ID2365804267
Medicare services, 2024
97
Medicare patients, 2024
112
Part D claims, 2024
94
Publications
27
MIPS score, 2024
89
Practice address
300 Pasteur Drive, Stanford, CA 94305
Practice phone
Call (650) 723-4000
Professional email
Get professional email
Personal email
Get personal email
Mobile number
Get mobile number
Social profiles

Primary practice

Stanford Hospital at 300 Pasteur Drive

Hospital · Stanford, California

See all 4 affiliations

Find Dr. Zhou'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

Dr. Margaret Jiemin Zhou is a gastroenterologist in Stanford, California

Dr. Zhou practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.

Dr. Zhou's NPI, 1184157992, was assigned on April 7, 2017. Dr. Zhou graduated from UCSF School of Medicine in 2017. Dr. Zhou holds California license A169235.

NPI and contact details
Medicare PAC ID
2365804267
NPI enumeration date
April 7, 2017
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(650) 723-4000
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Female
Estimated age
35
Medical school graduation
2017

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

Dr. Margaret Jiemin Zhou practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California

Dr. Zhou's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.

Source: Dmand AI Affiliation Data

Dr. Margaret Jiemin Zhou is affiliated with 2 sites of care and 2 medical groups

Dr. Zhou's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Zhou to 1 more hospital and 1 medical group, each named with a free account. Dr. Zhou's employer is on file too: a hospital.

See all 4 affiliations for Dr. Zhou

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

Dmand AI tracks the EHR system at Dr. Margaret Jiemin Zhou's practice

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

EHR by site
SiteEHR vendor and product
Stanford Hospital at 300 Pasteur DriveAvailable with a free account
+1 more site and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

See the EHR and IT leaders at every hospital where Dr. Zhou practices

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

Dr. Margaret Jiemin Zhou is one of 1,977 gastroenterologists in California

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

Specialties and state licenses

  • Gastroenterology, CaliforniaPrimaryLicense A169235 · 2020 to 2026 · taxonomy 207RG0100X

Gastroenterologists near Dr. Zhou

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. Margaret Jiemin Zhou billed Medicare for 97 services in 2024

CMS data shows 97 Medicare services from Dr. Zhou across 5 procedure codes in 2024, for 112 Medicare patients. Medicare paid $13,917 for them.

Medicare services, 202497
Medicare patients112
Paid by Medicare$13,917
Procedure codes5

Dr. Zhou's Medicare services by type, 2024

  1. Office and hospital visits49
  2. Surgery48

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

  • In an office7072%
  • In a facility2728%

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

  • Dr. Zhou
  • California median
Medicare services
97vs 58683% below
Medicare patients
112vs 30263% below
Part D claims
57vs 38085% below

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

Dr. Zhou'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. Zhou

Need commercial claims for Dr. Zhou?

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

Book a meeting

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

Dr. Margaret Jiemin Zhou treated 112 Medicare patients in 2024, average age 72

CMS counts 112 Medicare patients who saw Dr. Zhou in 2024. The largest group is 65 to 74, with 52 patients. 73% of them have high blood pressure, and 71% have high cholesterol. 30% are also on Medicaid. Their average risk score is 1.67, 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. Zhou's median patient age at 55, with 56% women.

Medicare patients, 2024112
Average age72
Average risk score1.67
Also on Medicaid30%

Dr. Zhou's Medicare patients by age, 2024

Dr. Zhou's Medicare patients by sex, 2024

  • Women5246%
  • Men6054%

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

  1. High blood pressure73%
  2. High cholesterol71%
  3. Arthritis40%
  4. Diabetes38%
  5. Chronic kidney disease33%
  6. Anxiety29%
  7. Ischemic heart disease27%
  8. Mood disorders26%

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

Dr. Zhou's patients across all payers

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

Patient panel by age, all payers

Median age 55

Patient panel by sex, all payers

  • Women56%
  • Men43%

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

Dr. Margaret Jiemin Zhou wrote 94 Medicare Part D claims in 2024

In 2024, Dr. Zhou wrote 94 Medicare Part D claims for 63 patients. 89% of them were for generic drugs. CMS names the drug for 57 of them, across 3 drugs with 11 or more claims each, at $943 in total drug cost. In 2020, CMS named 343 claims across 13 drugs.

Part D claims, 202494
Drugs named by CMS3
Total drug cost$943
Part D patients63

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

  • Generic84 claims89%
  • Brand-name and other10 claims11%

Dr. Zhou'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, 2020 to 2024

  • 2020
  • 2024
Claims for drugs CMS names
2020: 3432024: 5783%

Drugs named by CMS: 3 in 2024, 13 in 2020.

See all prescribing by Dr. Zhou

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. Margaret Jiemin Zhou 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. Zhou for performance year 2024, reported as part of a group. Dr. Zhou accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Zhou as offering telehealth. CMS counts 172 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Zhou, more than 88% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Zhou's MIPS scores, performance year 2024

  • 89of 100Final score
  • 87.1of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 70of 100Cost

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

Where Dr. Zhou ranks in Medicare procedure volume

Upper gastrointestinal (GI) endoscopy for acid reflux
88th percentile172 procedures
Colonoscopy
56th percentile34 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)

For MedTech and pharma teams

Find gastroenterologists like Dr. Zhou 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.

Dr. Margaret Jiemin Zhou has 27 publications on record

Dmand AI links 27 papers to Dr. Zhou, published from 2012 to 2024. 2020 was the busiest year, with 5. The most frequent topics are Colonoscopy, Colorectal Neoplasms and Early Detection of Cancer. Dr. Zhou has published most often in Clin Gastroenterol Hepatol. Dr. Zhou's most frequent co-authors are John O'Brien Clarke, MD, Daniel Ezra Freedberg, MD and Uri Ladabaum, MD.

Papers27
Years published2012 to 2024

Dr. Zhou's papers by year, 2012 to 2024

Topics Dr. Zhou writes about most

  • Colonoscopy
  • Colorectal Neoplasms
  • Early Detection of Cancer
  • Esophageal Neoplasms
  • Adenocarcinoma
  • Adenoma
  • Barrett Esophagus
  • Helicobacter Infections

Dr. Zhou's most frequent co-authors

Recent publications by Dr. Zhou

See all 27 publications and co-authors

See who Dr. Zhou researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Zhou 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. Margaret Jiemin Zhou received $287,404 in industry payments from 2021 to 2025

CMS Open Payments shows 76 general payments to Dr. Zhou from 10 drug and device companies from 2021 to 2025. Consulting fees make up the largest share, 84% of the total. CapsoVision, Inc. paid the most, $241,601.

General payments to Dr. Zhou by program year, 2021 to 2025

General payments to Dr. Zhou by kind, 2021 to 2025

$287.4Kin total
  • Consulting fees$241,60184%
  • Grants$37,50013%
  • Travel and lodging$5,7802%
  • Food and beverage$2,2851%
  • Education$2390%

Companies that paid Dr. Zhou the most, 2021 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Zhou

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

Dr. Margaret Jiemin Zhou graduated from UCSF School of Medicine

Dr. Zhou graduated from UCSF School of Medicine in 2017.

  1. Medical schoolUCSF School of Medicine
  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

Dr. Margaret Jiemin Zhou accepts plans from 7 insurance carriers

Dr. Zhou is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • United Healthcare
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare

Plan types Dr. Zhou accepts, by number of carriers

  1. Medicare4
  2. PPO4
  3. HMO3
  4. POS3
  5. EPO2

Source: Dmand AI Insurance Network Data

Sources for Dr. Margaret Jiemin Zhou'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)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)
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. Margaret Jiemin Zhou

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. Margaret Jiemin Zhou's NPI number?

Dr. Margaret Jiemin Zhou's NPI number is 1184157992. It was assigned on April 7, 2017, and it is active in the NPI Registry.

What kind of doctor is Dr. Margaret Jiemin Zhou?

Dr. Margaret Jiemin Zhou is a gastroenterologist in Stanford, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Dr. Margaret Jiemin Zhou practice?

Dr. Zhou practices at 300 Pasteur Drive, Stanford, CA 94305. Dr. Zhou's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dmand AI also links Dr. Zhou to 1 hospital and 1 medical group.

What is Dr. Margaret Jiemin Zhou's office phone number?

The practice phone on file for Dr. Zhou is (650) 723-4000.

What is Dr. Margaret Jiemin Zhou's medical license number?

Dr. Zhou holds California license A169235.

Which hospitals is Dr. Margaret Jiemin Zhou affiliated with?

Dr. Zhou practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California. Dmand AI links Dr. Zhou to 1 more hospital.

What medical group is Dr. Margaret Jiemin Zhou part of?

Dr. Zhou is linked to Stanford Health Care. Dmand AI links Dr. Zhou to 1 more medical group.

Does Dr. Margaret Jiemin Zhou accept Medicare?

Yes. CMS data shows Dr. Zhou billed Medicare for 97 services in 2024, and Dr. Zhou accepts Medicare assignment.

Does Dr. Margaret Jiemin Zhou offer telehealth?

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

What is Dr. Margaret Jiemin Zhou's MIPS score?

Dr. Zhou'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. Margaret Jiemin Zhou see?

CMS counts 112 Medicare patients who saw Dr. Zhou in 2024, with an average age of 72.

Is Dr. Margaret Jiemin Zhou board certified?

Yes. Dr. Zhou is board certified in gastroenterology by the American Board of Internal Medicine.

What services does Dr. Margaret Jiemin Zhou bill to Medicare?

In 2024, Dr. Zhou's most billed Medicare services were surgery: digestive system (43239), office visit, new patient (99205) and surgery: digestive system (45385).

Where did Dr. Margaret Jiemin Zhou go to medical school?

Dr. Zhou graduated from UCSF School of Medicine in 2017.

What drugs does Dr. Margaret Jiemin Zhou prescribe most?

In 2024 Medicare Part D data, Dr. Zhou's most prescribed drugs by claims were Peg 3350-Electrolyte, Omeprazole and Gavilyte-G.

Has Dr. Margaret Jiemin Zhou received payments from drug or device companies?

CMS Open Payments shows $287,404 in general payments to Dr. Zhou from 10 companies from 2021 to 2025. The largest total came from CapsoVision, Inc.

How long has Dr. Margaret Jiemin Zhou been practicing?

Dr. Zhou graduated from medical school in 2017, 9 years ago.

Does Dr. Margaret Jiemin Zhou do research?

Dmand AI links 27 publications to Dr. Zhou, published from 2012 to 2024.

Who does Dr. Margaret Jiemin Zhou publish with?

Dr. Zhou's most frequent co-authors are John O'Brien Clarke, MD (4 shared papers), Daniel Ezra Freedberg, MD (4 shared papers) and Uri Ladabaum, MD (4 shared papers).

What insurance does Dr. Margaret Jiemin Zhou accept?

Dr. Zhou is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. 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)